Stratigraphic Name | Stratno |  Previous Name  |Previous Name Stratno| Replacement Name | Replacement Name Stratno |Is Current | Rank | Status | Category | Usage | Parent Name | Parent Stratno | Chemical Parent Name | Chemical Parent Stratno | Top Minimum Age Name | Top Minimum Age (Ma) | Top Minimum Age Error (Ma)| Top Minimum Age Method | Topstrat Age Event | Base Maximum Age Name | Base Maximum Age (Ma) | Base Maximum Age Error (Ma) | Base Maximum Age Method | Basestrat Age Event | Minimum Thickness (m) | Maximum Thickness (m) | Type Section State | Definition Card | First ref as on form | Def ref as on form | Reserved by | Resdate | Approved by | Approved date |General Comments | Lithology Description | Primary Lithology Group | Secondary Lithology Group | Tectonic Setting | Intrusive | Granite Type | Last Update
Abarungkwa Sandstone|21096|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Bustard Subgroup|21402|||Orosirian|1815||inferred, overlying unit|deposition|Orosirian|1820||inferred||||NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Within Groote Eylandt Group.|Sandstone: pebbly, quartz-rich (lithic at base); granule conglomerate, quartz-rich; pebble to cobble conglomerate, polymict; quartz sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Abner Sandstone|55|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Collara Subgroup|35509|||Calymmian|||inferred|deposition|Calymmian|||inferred||35|220|NT|No|44436|23937|||||After Abner Range Sandstones of Jensen (1914). Name now [2013] restricted to undifferentiated succession of sandstone in the Abner Range. In 2001 former units Arnold Sst. Member, Jalboi Member and Hodgson Sst. Member are assigned to Collara Subgroup; Munyi Member is reassigned to the Corcoran Fm.  Occurs in the Beetaloo Sub-basin. Intruded by a sill of age 1280-110Ma. In 2010 it appears that Arnold Sst. Member and Hodgson Sst. Member were temporarily reinstated as members of Abner Sandstone.|White to grey, very fine to medium, ripple-marked and cross-bedded quartz sandstone; minor claystone interbeds.|siliciclastic sedimentary rock|||N||06-SEP-23
Acacia Gap Quartzite Member|71|Acacia Gap Tongue|74|||Yes|Member, phase|Formal|Other new published name|Defined|Wildman Siltstone|24105|||Orosirian|2019|4|inferred, lithostratigraphic correlation|deposition|Orosirian|2029||inferred, geological correlation|||300|NT|Yes|39068||Crick I.H.||Brakel, A.|29-MAY-82|Originally 'defined' [described] in 1962 as Acacia Gap Tongue of Masson Formation. Unit re-named and redefined by I. Crick in 1982. See also Rum Jungle Uranium Field 1:100 000 explan notes (1987). Within the Mount Partridge Group. Min deposition age (2019+/-4 Ma) as referred from ages of tuffaceous beds in the Wildman Siltstone, above Acacia Gap Quartzite Member.|Quartzite, commonly pyritic; sandstone; interbedded shale and phyllite, commonly carbonaceous. Magnetic.|metasedimentary siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Accident Subgroup|37738|||||Yes|Subgroup|Formal|Resvd name published|Defined|South Nicholson Group|17123|||Calymmian|1492|4|inferred, geological correlation||Calymmian|1500||inferred, geological correlation||400|3350|QLD|Yes|65336||Rawlings, D.|22-NOV-02|Withnall, I.W.|08-MAY-06|Used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area. (7/06 PP).|A succession of sandstone, siltstone, shale and minor conglomerate and sedimentary ironstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Adam Shale|92|Grant Bluff Formation|7690|||Yes|Formation, beds|Formal|Other new published name|Defined|Shadow Group|37961|||Early Cambrian||||deposition|Early Cambrian||||||16|NT|No|8217|35798|||||Previously included in underlying Grant Bluff Formation.|Green and brown pyritic shale, black shale toward top; minor basal brown-grey sandstone.|siliciclastic sedimentary rock||continental rift|N||17-JUL-23
Adla Granulite|28157|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Strangways Metamorphic Complex|17395|||Paleoproterozoic|1790||||Paleoproterozoic|1820||||||NT|Yes|48992|48992|Langworthy, A.P.|25-JUL-75|Brown, M.|01-NOV-79|Proposed by Langworthy A.P. in RC79/047. Replaced in part by Bunghara Metamorphics, may need to be redefined. Arunta Block.  Defn approved by: C.T. Branch/M Brown (per V Passmore)|Migmatitic garnet-biotite-sillimanite gneiss and mafic granulite, along with felsic granulite and rare calc-silicate rock and quartzite.|high grade metamorphic rock|||N||17-JAN-23
Adnera Member|24148|||||Yes|Member, phase|Formal|Resvd name published|Defined|Central Mount Stuart Formation|3865|||Ediacaran|||inferred, biostratigraphic correlation|deposition|Ediacaran|||inferred, underlying unit||72|310|NT|Yes|42504|42643|Haines P.W., Bagas L.|17-DEC-87|Kruse, P.D.|10-APR-90|First reserved as Adnera Sandstone. Age is Ediacaran (Late Adelaidean).|Medium-grained, white, feldspathic quartz arenite and orthoquartzite. Some granule horizons. Upper unit of red-brown sandstone and siltstone in some areas. Well developed cross-bedding. Rare trace fossils in upper unit.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Age Creek Formation|151|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Middle Cambrian||||deposition|Middle Cambrian||||||1200|NT|No|34395|44211|||||See also Lexicon. Type Section type advised by Paul Blake 30-JUN-2023.|Calcarenite, dolarenite. Contains platform and platform-edge carbonates.|carbonate sedimentary rock|||N||17-JUL-23
Aileron Metamorphics|168|Aileron metamorphics|24149|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian|||||Orosirian|||||||NT|Yes|8222||Warren R.G.|30-APR-72|Comm. Territories SNSC|06-MAR-79|Reserved and first published in R216, as Aileron metamorphics. Defn by Stewart A.J., Glikson A.Y., Warren R.G|Felsic and mafic granulite, cordierite granulite, amphibolite, biotite-, garnet-biotite gneiss, sillimanite gneiss, quartzofeldspathic gneiss, calc-silicate rock, marble, quartz rich sediments|high grade metamorphic rock|||N||17-JAN-23
Aileron Metamorphics - highly magnetic|76201|||||Yes|Member, phase|Informal|Variation of published name|Unpublished|Aileron Metamorphics|168|||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Aileron Province. Gneissic mafic granulite, amphibolite and felsic granulite (paragneiss). Informal unit to be used for Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Gneissic mafic granulite, amphibolite and felsic granulite (paragneiss)|high grade metamorphic rock|||N||17-JAN-23
Aileron Province - granite 79877|79877|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. See also 'Arunta Block granitoids 78447', also Qld.|Granite.|acid intrusive rock|||Y||17-JAN-23
Aileron Province - moderately magnetic rocks 79888|79888|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Aileron Province - metasedimentary and igneous rocks 81851|81851|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Interpreted unit for basement geology work of A.J. Stewart. Appears on the Glenormiston 250k map sheet.|Unknown.||||U||17-JAN-23
Aileron Province - strongly magnetic rocks 79905|79905|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Aileron Province - metasedimentary and igneous rocks 81851|81851|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. Appears on the Glenormiston 250k map sheet.|Unknown.|unknown|||U||17-JAN-23
Aileron Province - weakly magnetic rocks 79924|79924|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Aileron Province - metasedimentary and igneous rocks 81851|81851|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Interpreted unit for basement geology work of A.J. Stewart. Appears on the Glenormiston 250k map sheet.|Unknown.||||U||17-JAN-23
Airport Porphyry|81915|Airport porphyry|79077|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Orosirian|||inferred||Orosirian|1846|2.9|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|71592||||||Tennant Creek Region. Variation of Airport porphyry (Unit no. 79077).|Felsic porphyry.|acid volcanic rock|||N||17-JAN-23
Albarta Metamorphics|26252|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1729|3|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Statherian|1776|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|No|39887|49036|R.D.Shaw|28-MAR-80|||Res 1980. Publ VL70 1985. Maximum intrusion age: 1771+/-3Ma; metamorphic age: 567+/-9Ma. Dating of metamorphic monazite from Casey Inlier (Carson et al. 2009) gave age of 1729 +/-3 Ma.|Quartzofeldspathic gneiss, biotite and muscovite-biotite schist, massive and compositionally layered amphibolite; minor calc-silicate rock, hornblende gneiss, magnetite-quartzite, granitic gneiss, porphyroblastic feldspar gneiss and biotite gneiss.|foliated metamorphic rock|||N||17-JAN-23
Albinia Formation|27692|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Cryogenian||||deposition|Cryogenian||||||500|NT|Yes|46903|45155|Wells A.T.||Wells, A.T.|01-OCT-77|Presumably reserved in 1977 if definition approved then. Defined as Adelaidean (1977), updated to Neoproterozoic (2010) to conform to 2004 timescale. Probably disconformably overlies Vaughan Springs Quartzite. Inferred thickness 150-500m thick.|Thinly interbedded grey mudstone, dolomitic mudstone and foetid black shale; ovoid dolomite nodules are characteristic. Includes a band of distinctive pale grey to black columnar stromatolitic dolostone with thinly bedded to laminated chert lenses.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Alcoota beds|76102|Alcoota Beds|76103|||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||||Pliocene|||||Miocene||||||180||No|5030||||||[Also] of  Senior (1972) - BMR Record 1972/47. Waite Basin. Part of the Alcoota beds succession is now Miocene-Pliocene Waite Formation. See also Arcoota Beds.|Basal mudstone and siltstone, overlain by coal and lignite intervals beneath lacustrine clays; followed up-section by beds of cream or white, chalcedonic calcarenitic limestone (Waite Formation).|siliciclastic sedimentary rock|||N||17-JAN-23
Alcurra Dolerite|39599|Alcurra Dyke Swarm|29763|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Warakurna Supersuite|73257|Stenian|1054|14|isotopic, Rb/Sr|intrusion|Stenian|1085|2|isotopic, Ar/Ar||||NT|Yes|61154|61154|Edgoose, C.|03-AUG-92|Kruse, P.D.|31-OCT-03|See also Alcurra dolerite. Also included in 'post-Musgravian mafic dykes, sills, plugs 79298' in 1:2.5million national dataset.|Dolerite in dykes, sills, or plugs, with olivine gabbro, olivine norite, mesocratic orthopyroxene(-olivine) ferronorite to ferrodiorite.|basic intrusive rock|||Y||11-OCT-23
Aleeltara Granite|75899|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas.|Granite.|acid intrusive rock|||Y||17-JAN-23
Algamba Dolostone Member|76120|Algamba Dolomite Member|24151|||Yes|Member, phase|Formal|Variation of published name|Briefly described|Pine Hill Formation|26103|||Statherian||||deposition|Orosirian||||||||No|65338||||||Within the Reynolds Range Group. Intruded by Warimbi granite. See definition card for Algamba Dolomite Member. Age from Pine Hill Formation.|Massive pure dolostone and limestone (including algal boundstone) topped by siliceous sericitic shale, and ferruginous siltstone and sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Algebuckina Sandstone|262|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Valanginian||||deposition|Toarcian||||||750|SA|No|44689|41063|||||Age: Early Jurassic to Early Cretaceous but includes 2 erosional breaks.[from chart dated 1/5/97]. See also Algebuckina Formation. This unit is said to be (Eromanga) basin margin equivalent to Hutton Sandstone, Namur Sandstone [Callabonna 1:250k map sheet, (2000)].|A thick succession of fine- to coarse-grained, quartzic continental sandstone, with granule and pebble layers; minor shale and siltstone. Shale intraclasts are common in coarser beds. Contains a variety of plant macrofossils.|siliciclastic sedimentary rock|||N||17-JUL-23
Ali Curung Granite|24152|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Ali Curung Suite|33043|Statherian|1660||isotopic, Rb/Sr|intrusion|Statherian|1713||||||NT|Yes|42643|42643|L.Bagas|28-AUG-84|Kruse, P.D.|10-APR-90|Briefly described as Ali Curung Complex (91/27249 Table 2 p14). Intrudes the Hatches Creek Group.|A multi-phase intrusion with six mappable units: porphyritic to equigranular biotite and biotite-muscovite granites, with lesser leucogranite and biotite granodiorite.|acid intrusive rock|||Y||17-JAN-23
Alice Springs Granite|27281|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1750|20|isotopic, Sm/Nd|intrusion|Statherian|1752|11|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|9199|48992|Offe L.A.|22-NOV-73|Brown, M.|31-OCT-78|Defn card held [CEB May 2002]|A homogeneous foliated biotite-muscovite granite, varying from equigranular to porphyritic.|acid intrusive rock|||Y||17-JAN-23
Alinjabon Sandstone|28277|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Hanlon Subgroup|24304|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Statherian|||||350|750|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|07-OCT-81|Brakel, A.|17-FEB-84|Davenport Project. Defn card held [CEB May 2002].  Within the Hatches Creek Group. In the Tennant Creek Inlier Davenport Province. See also the informal Alinjabon sandstone.|Subarkosic and sublithic arenite, quartz arenite; minor mafic lava, greywacke, chert and ironstone.|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Alkara Suite|81826|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1724|6|isotopic, U/Pb-Pb/Pb ICP-MS||Statherian|1735|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|73591||Reno, B. (NTGS)|31-JAN-20|Munson, T. (NTGS)|25-AUG-22|To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Named for Alkara Creek. Nearest town is Alateye. Rasdiometric age from Jamaica Granite.|Granite.|acid intrusive rock|||Y|S-type|02-JUN-23
Alkipi Metamorphics|41842|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Yaya Metamorphic Complex|41858|||Paleoproterozoic|1640||isotopic, U/Pb|metamorphism|Paleoproterozoic|1670||isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Warumpi Province.Interpreted to be a package of siltstone and sandstone, intruded by granite and mafic rock, that was metamorphosed to granulite facies. Two samples of metapelite have maximum deposition ages of 1670-1650 Ma, based on SHRIMP U-Pb dating of detrital zircons, with metamorphic zircon rims with ages of ~1640 Ma (Kinny 2002).|Metapelite, metapsammite; lesser strained biotite- and hornblende-bearing granite, felsic migmatite, mafic amphibolite; Quartz-rich metasediments, quartzite, garnet-biotite-sillimanite-pelite, biotite migmatite, mafic amphibolite, strained granite.|metasedimentary siliciclastic rock|||Y||17-JAN-23
Allamber Springs Granite|27035|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Allamber Springs Suite|31739|Orosirian|1818|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1826|18|isotopic, U/Pb-Pb/Pb, TIMS|||||No|39679||Needham, R.S.|13-JUL-83|||Of Cullen Batholith/Cullen Supersuite. Pine Creek Province. One of a group of concentrically zoned transitional granite and leucogranite dominated plutons. Intrudes Manton Group, Mount Partridge Group and South Alligator Group.|Pink and green, coarse porphyritic hornblende-biotite granite; pink coarse porphyritic biotite granite; equigranular biotite leucogranite. I-type mostly.|acid intrusive rock|||Y|I-type|17-JAN-23
Allamber Springs Granite - phase 1|72375|||||Yes|Member, phase|Informal|Variation of published name|Described|Allamber Springs Granite|27035|||Orosirian|1818|||intrusion|Orosirian|1822|||||||No|||||||Lithology referring to an informal unnamed unit of the Allamber Springs Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pink and green, coarse porphyritic hornblende-biotite granite|acid intrusive rock|||Y||17-JAN-23
Allamber Springs Granite - phase 2|72376|||||Yes|Member, phase|Informal|Variation of published name|Described|Allamber Springs Granite|27035|||Orosirian|1818|||intrusion|Orosirian|1822|||||||No|||||||Lithology referring to an informal unnamed unit of the Allamber Springs Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pink coarse porphyritic biotite granite|acid intrusive rock|||Y||17-JAN-23
Allamber Springs Granite - phase 3|72377|||||Yes|Member, phase|Informal|Variation of published name|Described|Allamber Springs Granite|27035|||Orosirian|1818|||intrusion|Orosirian|1822|||||||No|||||||Lithology referring to an informal unnamed unit of the Allamber Springs Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Equigranular biotite leucogranite|acid intrusive rock|||Y||17-JAN-23
Allamber Springs Suite|31739|||||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic||||||||No|70866||NTGS|19-JAN-07|||Of Cullen Batholith. Pine Creek Province.|Concentrically zoned transitional granites and leucogranite-dominated plutons.|acid intrusive rock|||Y||17-JAN-23
Allanah Gneiss|38051|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Mesoproterozoic|1539|23|isotopic, U/Pb-Pb/Pb ion probe||Mesoproterozoic|1591|30|isotopic, U/Pb-Pb/Pb ion probe|||||No|24302|24301|||||See also Allanah Granitic Gneiss. Age: 1539+/-28Ma.  In the Olia Chain (Mulga Park Domain). Amphibolite facies felsic gneiss of the 1600-1540Ma period.|Biotite-bearing granitic gneiss with secondary muscovite; grey, medium grained; commonly migmatitic with veins of partial melt cutting early gneissic fabric|metamorphosed acid igneous rock|||N||17-JAN-23
Allaru Mudstone|291|Allaru Member|290|||Yes|Formation, beds|Formal|Variation of published name|Defined|Wilgunya Subgroup|20031|||Albian||||deposition|Albian|||||87|700|QLD|No|33642|63979|||||See also Allaru Formation. Previously considered laterally equivalent to Oodnadatta Formation, but not by Roach (2015). The name Allaru Mudstone is only used when Toolebuc Formation is present, see Strzelecki 1:250k explan notes (1995). Part of Wilgunyah Subgroup, Rolling Downs Gp, although some authors attribute it to the Maree Subgroup of the Neales River Group. See also Alluru Mudstone (a misspelling). Type Section type advised by Paul Blake 30-JUN-2023.|Primarily blue-grey mudstone (partly pyritic) and interbedded calcareous siltstone, cone-in-cone limestone and lesser sandstone.|fine grained siliciclastic rock|carbonate sedimentary rock|intracratonic|N||17-JUL-23
Allia Creek Granite|303|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Allia Creek Suite|39136|Orosirian|1806|7|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1850|||||||No|45003||||||In Pine Creek Province.  Age: ~1845Ma. See also older form - Allia Granite. Intrudes Burrell Creek Formation, unconformably overlain by Depot Creek Sandstone|Biotite granite commonly coarsely porphyritic with large phenocrysts of microcline, some xenoliths, associated muscovite-tourmaline-quartz pegmatites.|acid intrusive rock|||Y|S-type|17-JAN-23
Allia Creek Suite|39136|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Orosirian|1806||||Orosirian|1872|||||||No|50586||||||See also Allia Suite. Age limits from constituent units (Rb/Sr dates excluded).|Predominantly S-type granites containing peraluminous minerals (eg andalusite, cordierite and muscovite); high-level intrusions (numerous pegmatites and greisens). Fractionated.|acid intrusive rock|||Y|S-type|17-JAN-23
Alooarjara Metamorphics|75901|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Paleoproterozoic|1754|6|||Paleoproterozoic|1770|||||||No|66767||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|Garnet-bearing metapsammite; garnet-orthopyroxene-hornblende-bearing quartzo-feldspathic granulite sampled from layers within dominantly metapelitic rocks.|metasedimentary siliciclastic rock|||N||17-JAN-23
Aloolya Gneiss|26291|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian|1807|6|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1818|5|||||NT|Yes|48992|48992|A.J.Stewart|05-JUL-74|Wells, A.T.|12-NOV-76|Intruded by Possum Creek Charnockite. Crystal Age: 1818+/-5Ma.|Medium-grained granitic gneiss, with tourmaline and garnet.|foliated metamorphic rock|||Y||17-JAN-23
Alroy Formation|81848|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian|1855||inferred, intrusive relationship||Orosirian|1872.5|3.1|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|23.2|182|NT|Yes|73427||Clark, A. (GA)|25-FEB-20|Munson, T. (NTGS)|25-NOV-22|Named after the Alroy 1:250k mapsheet, SE53-15. Entirely subsurface. Identified from 3 drill hole descriptions and geophysical interpretation.These deformed and metamorphosed rocks are no longer considered correlative with the Ooradigee Group (as believed in the past).Instead, their age, detrital spectra, structural and metamorphic characteristics and lithology are far more comparable to the Warramunga Formation and the Murphy Metamorphics of the Warramunga and Murphy Province. Proposed publication: GA basement geology dataset,EFTF-related abstracts, during 2020. Type locality: Drill-hole DDH005, down-hold depth from 147.42 m to 284.40 m (EOH). Drilled at 600288mE and 7841346mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs.|Metasedimentary rocks: banded garnet schist, phyllite and siltstone; cordierite gneiss; graphitic schist; marble; tightly folded and sheared; locally abundant hematite and magnetite alteration.|metasedimentary rock|||N||02-FEB-23
Alroy Formation - moderately magnetic|82221|||||Yes|Member, phase|Informal|Variation of published name|Briefly described|Alroy Formation|81848|||Orosirian|||inferred||Orosirian|||inferred|||||No|||||||East Tennant basement interpretation - Andy Clark.|Moderately magnetic metasedimentary rock and minor volcanic rock.|metasedimentary rock|igneous volcanic rock||N||17-JAN-23
Alroy Formation - strongly magnetic|82219|||||Yes|Member, phase|Informal|Variation of published name|Briefly described|Alroy Formation|81848|||Orosirian|||inferred||Orosirian|||inferred|||||No|||||||East Tennant basement interpretation - Andy Clark.|Strongly magnetic skarn, calc-silicate rock and/or altered clastic sedimentary rock. Minor volcanic components.|metasedimentary rock|||N||17-JAN-23
Alroy Formation - weakly magnetic|82220|||||Yes|Member, phase|Informal|Variation of published name|Briefly described|Alroy Formation|81848|||Orosirian|||inferred||Orosirian|||inferred|||||No|||||||East Tennant basement interpretation - Andy Clark.|Weakly magnetic clastic metsedimentary rock. Predominantly turbiditic shale and siltstone, but schistose or gneissic in some areas.|fine grained siliciclastic rock|high grade metamorphic rock||N||17-JAN-23
Alsace Quartzite|332|Myally Beds|13628|||Yes|Formation, beds|Formal|Resvd name published|Defined|Myally Subgroup|13635|||Statherian|1650||inferred, geological correlation|deposition|Statherian|1779|5|||70|600|QLD|Yes|30529|30534|Derrick G.|21-APR-75|Staines, H.R.E.|18-MAR-76|Defn card held [CEB Msy 2002].  Within the Haslingden Group.|Quartzite, sandstone, grey-pink, feldspathic to quartzose, medium to coarse-grained, massive to blocky, thick to thin-bedded; contains some clayey rock fragments; thin grey-green siltstone interbeds near the top.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Alyangula Subgroup|21122|||||Yes|Subgroup|Formal|Resvd name published|Defined|Groote Eylandt Group|33979|||Statherian||||deposition|Orosirian|||inferred|deposition||1100|NT|Yes|71606|22808|Haines P.W., Rawlings D.J., Pietsch B.A.|01-MAR-95||||Predominantly sandstone and pebbly sandstone with minor pebble and conglomerate, interbedded with basalt and dolerite (Bartalumba Basalt and thin basaltic unit in Dalumbu Sandstone).|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Alyinga Sandstone|21123|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Alyangula Subgroup|21122|||Statherian||||deposition|Statherian||||||300|NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Within the Groote Eylandt Group.|Medium- to coarse-grained sandstone, with very large trough cross-beds in lower part. Basal polymict granule to boulder conglomerate and pebbly and cobbly sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Amata Dolerite|42483|Amata dyke swarm|42407|||Yes|Formation, beds|Formal|Resvd name published|Described|||||Tonian|790|40|isotopic, Sm/Nd|intrusion|Tonian|824|4|isotopic, U/Pb|||||No|60679||Gum, J. (PIRSA)|27-JUN-05|||Evidence suggests this dolerite forms part of a widespread episode of mafic magmatism across several tectonic provinces. Intrudes the Pitjantjatjara Supersuite. See also informal Amata dykes.|Medium-grained, intergranular to subophitic dolerite dykes; gabbro.|basic intrusive rock|||Y||17-JAN-23
Amata Dolerite, Alcurra Dolerite|72639|||||Yes|Formation, beds|Informal|Variation of published name|Described|post-Musgravian mafic dykes, sills, plugs 79298|79298|||Neoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Basement geology description: Post-Musgravian mafic dykes, sills and plugs; variably magnetic, including reversely magnetised; may be as young as Neoproterozoic. Mulga Park and Fregon Subdomain, Musgrave Province.|Dolerite and amphibolite dykes, sills and plugs; minor gabbro|basic intrusive rock|||Y||11-OCT-23
Amazon Dolerite|83022|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Calymmian|||inferred||Calymmian|1569|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|||Schofield, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Named after Amazon Lagoon, approx. 15 km to the northwest. Type locality: Drill-hole NDIBK08, down-hold depth from 225.84 m to 227.20 m. Drilled at 627699mE and 7862236mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. Distinguished by Massive texture, dark colour, relatively young age (see below) and intrusive contacts with surrounding supracrustal rocks of the Alroy Formation.|Fine- to medium-grained fractured mafic rock, intensively altered by a propylitic assemblage of calcite, albite/adularia, epidote, chlorite, biotite, quartz and pyrite, with minor talc, actinolite and hematite.|metasomatic rock|basic igneous rock||Y||02-FEB-23
Ambalindum Sandstone Member|21126|||||Yes|Member, phase|Formal|Resvd name published|Described|Hale Formation|25689|||Lutetian||||deposition|Paleocene||||||||No|43748||Senior B.|22-DEC-94|||Of the Tertiary Hale Formation, Hale Hale, Ti-Tree and Waite  Basins. Not related to 1932 Precambrian Ambalindum Series.|Argillaceous, poorly sorted sandstone and pebble conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Ambulbinya Supersuite|75900|||||Yes|Supergroup|Formal|Resvd name published|Briefly described|||||Statherian|||||Statherian||||||||No|69917||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|||||Y||17-JAN-23
Amelia Dolostone|76091|Amelia Dolomite|25760|||Yes|Formation, beds|Formal|Variation of published name|Described|Umbolooga Subgroup|18813|||Statherian|||||Statherian|||||50|180|NT|No|63112||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). See Amelia Dolomite in Jackson (1987) p65-72 for definition.|Stratiform, domical, conical and columnar stromatolitic dololutite and silty dololutite with interbeds of dolarenite and shale and rare fine-grained sandstone; ooid, brecciated and conglomeratic intervals common; local sideritic 'marble'|carbonate sedimentary rock|||N||17-JAN-23
Amesbury Quartzite|24156|Amesbury Quartzite Member|367|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Plenty Group|37959|||Neoproterozoic|||inferred, overlying unit|deposition|Cryogenian|||inferred|||20|NT|Yes|42504|42643|Haines P.W.  (originally Offe, 1978)|08-MAY-90|Kruse, P.D.|10-APR-90|Previously reserved,  then published as Amesbury Quartzite Member in 79/19617 (1978). Age may not be as precisely known as stated.|White rippled and crossbedded orthoquartzite and quartz arenite with dessication cracks and clay galls; minor bimodal quartz granule and pebble beds near base; thin basal conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Amos Formation|25761|||||Yes|Formation, beds|Formal|Other new published name|Defined|Batten Subgroup|1257|||Statherian|||inferred|deposition|Statherian|||inferred||||NT|No|44287|45162|||||Defn on Tech File E/53-3. Different from Amos Knob Formation, Victoria River region (Birrindudu Basin). Within the McArthur Group. Part of the Lawn Supersequence. Dated from tuffs in ~ the middle of the formation.|Dolomitic siltstone, dolomite, dolomitic sandstone, sideritic chert. Includes red sandy grainstones and sandstones, and stylolitic and pisoloidal crystalline carbonate; pink tuff beds.|carbonate sedimentary rock|igneous volcanic rock||N||17-JAN-23
Amos Knob Formation|29231|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian|||inferred, overlying unit|deposition|Statherian||||||41|NT|No|28255|48943|||||SE52-8. Victoria River region. Different unit from Amos Formation, McArthur Basin. Basis for showing Statherian age seems to be dating of a tuffite in Kunja Siltstone (higher in Limbunya Group) [CEB Oct 2011]. Birindudu Basin.|Stromatolitic dolostone, dolarenite, mudstone, dolomitic mudstone; interbedded.|carbonate sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Ampiara member|68767|||||Yes|Member, phase|Informal|Other new published name|Briefly described|Mount Currie Conglomerate|12609|||Cambrian||||deposition|Cambrian||||||||No|60683||||||Informal format for the name.|Conglomerate with rounded pebble to boulder-sized clasts of silicified Winnall beds sandstone, with minor tuff fragments in the upper section; epidotised sandstone matrix.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Amputjuta Dacite|35317|Umputjutu Dacite|33814|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||Pottoyu Granite Suite|33649|Stenian||||eruption|Stenian|1153|3|isotopic, Pb/Pb||||NT|Yes|50321|65256|Edgoose C., Close D.|23-NOV-99|Kruse, P.D.|21-JAN-02|Bloods Range 1:250 000 map sheet area. Age: 1153+/-3Ma (Pb-Pb). Type Section: 24 56' 53.04'' S, 129 05' 10.25''E (WGS84). Underlies Dean Quartzite in the Mannanana Range. Within the Pitjantjatjara Supersuite.|Finely porphyritic hypabyssal dacite; less abundant equigranular leucogranite.|acid volcanic rock|||N||17-JAN-23
Amulda Member|393|||||Yes|Member, phase|Formal|Other new published name|Defined|Parke Siltstone|14883|||Devonian||||deposition|Devonian|||||||NT|No|31566|31566|||||Within the Pertnjara Group.|Interbedded fine- to coarse-grained sandstone and sandy, micaceous siltstone; siltstone is more abundant towards the base and is laminated or massive.|siliciclastic sedimentary rock|||N||17-JAN-23
Amungee Member|80427|Velkerri Formation, middle|40494|||Yes|Member, phase|Formal|Resvd name published|Defined|Velkerri Formation|19074|||Mesoproterozoic|1312.9|.7|inferred|minimum depositional age|Mesoproterozoic|1492|4|inferred, underlying unit|maximum depositional age|75|502|NT|Yes|71779|71779|Munson, T.|19-FEB-18|Normington, V.|25-JUN-18|Name derived from the Amungee Mungee Station in the Tanumbirini 250k mapsheet. Nearest town is Daly Waters.|Interlaminated to thinly interbedded, grey-green to dark grey claystone, pale grey siltstone and rare, light grey fine-grained sandstone, with intervals of massive to laminated, grey-green and dark grey to brown-black organic-rich to -poor claystone.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Anamarra Orthogneiss|409|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|60547||Langworthy A.P.||Branch, C., Brown, M.|31-MAR-79|The definition card for this unit claims to be for the informal Anamarra orthogneiss, but applies equally to the formal, capitalized version of the name. See RC79/047. See also full description of Anamarra orthogneiss published in R216. Se also the Anamarra Granite, which seems to be the more recently preferred version of the name.|Porphyroblastic orthogneiss, granitic gneiss|metamorphosed acid igneous rock|||N||17-JAN-23
Anburla Anorthosite|410|Mount Hay Anorthosite|12785|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic||||intrusion|Paleoproterozoic|||||||NT|Yes|49831|43503|||||Reserved as Anburla Leuconorite (Shaw 1991). For Hermannsburg 1:250 000 sheet area. Arunta Block. Defn card not found [May 2002 CEB]|Plagioclase-rich mafic granulite (meta-anorthosite), gabbronorite|basic intrusive rock|||Y||17-JAN-23
Andagera Formation|24158|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mopunga Group|12305|||Ediacaran|||inferred, geological correlation|deposition|Ediacaran|||inferred, geological correlation|||50|NT|Yes|68518|41524|L.Bagas|23-MAR-84|Brakel, A.|26-NOV-86|Age is Ediacaran (Late Adelaidean). Age restricted from 'Neoprot to Early Cambrian' because whole of Mopunga Group is shown as Ediacaran. Was previously mapped as part of Sandover beds (Smith and Milligan, 1966) in central and eastern parts of region, and as part of Tomahawk beds (Smith and Milligan, 1964) in the west.|Conglomerate: massive, oligomictic, arenaceous matrix; pebbly sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Andrew Young Igneous Complex|21137|||||Yes|Group, Suite|Formal|Resvd name published|Described|||||Statherian|1633|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1640|6|isotopic, U/Pb-Pb/Pb ion probe|||||No|43749||Young D.N.|19-JAN-93|||Mount Doreen area. Part of the complex is 1640Ma in age.|Orthopyroxene and olivine norite, gabbronorite, diorite, porphyritic biotite granite, anorthosite and calc-silicate rock|basic intrusive rock|acid intrusive rock||Y||17-JAN-23
Angalarri Siltstone|437|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Auvergne Group|787|||Cryogenian|838|80|isotopic, Rb/Sr|deposition|Cryogenian|1147|26|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|300|753|NT|No|45022|48938|||||Age: 838 +/-80Ma (Rb-Sr, Webb and Page 1977)(controversial?) . Formerly shown as Calymmian but reason not clear. Group is Neoproterozoic. Age is Adelaidean. See also the misspelt Angalarri Sandstone. Victoria Basin.|Siltstone,  interbeds of fine sandstone, shale; minor dolostone and limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Angatja Granite|33655|Angatja|30601|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Angatja Suite|42420|Stenian|1071|5|isotopic, Pb/Pb|intrusion|Stenian|1071|5|isotopic, Pb/Pb||||NT|Yes|60572|60683|Scrimgeour I., Close D.,Edgoose C.|13-NOV-96|Beier, P.|27-JUL-99|PETERMANN RANGES 1:250 000 sheet area. Age: 1071+/-5Ma. Intrudes the Alcurra Dolerite in the eastern Mann Ranges.|Porphyritic orthopyroxene-clinopyroxene granite (locally with rapakivi textures) and coarsely porphyritic hornblende-biotite granite; both variably mylonitised and recrystallised.|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Angatja Suite|42420|||||Yes|Group, Suite|Formal|Variation of published name|Described|||Warakurna Supersuite|73257|Mesoproterozoic|1071|5|isotopic, Pb/Pb||Mesoproterozoic||||||||No|60683||||||See also Angatja Granite Suite.  Age: 1071+/-5Ma (Pb-Pb).|Foliated, porphyritic orthopyroxene-clinopyroxene granite, charnockite, hornblende-biotite granite; variably mylonitised and recrystallised to garnet-clinopyroxene-biotite-bearing assemblages|metamorphosed acid igneous rock|||Y||17-JAN-23
Angula Metamorphics|75790|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Beyer, E. (NTGS)|03-NOV-10|||To be published = Alcoota 2nd edition 1:250,000 geological map and explanatory notes|Interlayered granulite facies metapsammite and metapelite|metasedimentary siliciclastic rock|||N||17-JAN-23
Angulmeri Quartzite Member|23336|Angulmeri Member|457|||Yes|Member, phase|Informal|Variation of published name|Mentioned|||||Paleoproterozoic||||deposition|Paleoproterozoic||||||||No|39679||G.M.Fahey, J.E.Fahey|18-APR-83|||Probably obsolete?|||||N||17-JAN-23
Anira Metamorphics|69778|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1723|3|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Statherian|1785|19|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|61388|65341|Haines, P.W., Scrimgeour, I.R.|31-JUL-07|||SHRIMP U-Pb zircon maximum deposition age of 1785+/-19 Ma. Metamorphic age from Casey Inlier sample: 1723+/-3 Ma (Carson et al. 2009).|Granulite facies metasediments; cordierite-rich migmatite, meta-psammite.|high grade metamorphic rock|||N||17-JAN-23
Ankala Gneiss|39322|Ankala gneiss|24160|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|9199||R.D.Shaw|21-FEB-75|Branch, C., Brown, M.|01-NOV-79|Definition card says its for Ankala gneiss but applies equally to the more formal capitalised Ankala Gneiss.|Quartzofeldspathic gneiss, calc-silicate rock, biotite gneiss, quartz-rich biotite gneiss, amphibolite; rare marble, cummingtonite rock, meta-ultramafic rock, hematite quartzite, sillimanite gneiss|foliated metamorphic rock|||N||17-JAN-23
Anmatjira Orthogneiss|466|Anmatjira orthogneiss|467|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Harverson Suite|30858|Statherian|1795|4|||Orosirian|1798|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992|48992|Stewart A.J.||Strusz, D.L.|03-AUG-73|If Defn approved before publication, name must have been reserved. Intrudes Tyson Creek granulite, Weldon metamorphics, Possum Creek Charnockite (probably), Lander Rock beds (q.v.), and Mount Stafford beds (q.v.). Note: name still in use in 2008. See also Anmatjira Granite.|Coarse porphyritic granitic augen gneiss, comprising ovoids of microcline up to 10 cm across and smaller subhedral rapakivi feldspars (microcline mantled by plagioclase) in granitic groundmass.|metamorphosed acid igneous rock|||Y||17-JAN-23
Anmatyerre Clay|35247|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Chibanian||||deposition|Lower Pleistocene||||||80||No|61828||English P.|22-JAN-00|||Lake Lewis region. Palaeolacustrine unit roughly analogous to Uluru Clay & Winmatti beds at Lake Amadeus, Etadunna Formation at Lake Eyre, Blanchetown Clay & Lake Tyrrell beds in the Murray Basin etc.|Distinctive lacustrine facies - red/brown homogeneous clay.|regolith|||N||17-JAN-23
Annaburroo Volcanic Member|21141|||||Yes|Member, phase|Informal|Resvd name published|Mentioned|Wildman Siltstone|24105|||Proterozoic||||eruption|Proterozoic||||||||No|50586||P.G.Stuart-Smith, Bastrakova I.|17-JAN-80|||Originally reserved in 1980. Reservation lapsed when name only used informally in BMR Record 1980/15, p2. Re-reserved for original use. Only published once.|||||N||17-JAN-23
Anningie Member|72424|Anningie|35618|||Yes|Member, phase|Formal|Resvd name published|Defined|Lander Rock Formation|69780|||Statherian|1789||inferred, intrusive relationship|deposition|Orosirian|||inferred, geological correlation|||1200|NT|Yes|62642||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||Reserved as Anningie. Intruded by Esther Granite|Predominantly micaceous fine-grained quartzo-feldspathic schist; local sillimanite schist apparently proximal to contacts with intrusive mafic rocks; layer-parallel ortho-amphibolite.|high grade metamorphic rock|||N||17-JAN-23
Anthony Lagoon Formation|76092|Anthony Lagoon beds|482|||Yes|Formation, beds|Formal|Variation of published name|Defined|Barkly Group|32954|||Middle Cambrian||||deposition|Middle Cambrian||||||||No|67144|67352|||||'Anthony Lagoon beds' was formally redefined as 'Formation' in the explanatory notes for: Kruse PD, Maier RC and Khan M, 2009. Walhallow-Brunette Downs-Alroy-Frew River, Northern Territory. 1:250 000 geological map series explanatory notes, SE 53-07, SE 53-11, SE 53-15, SF 53-03. Northern Territory Geological Survey, Darwin. (T. Munson, NT Convenor, 26-AUG-2011).|Dolomudstone/dolosparstone, dolomitic-siliciclastic siltstone and mudstone, dolomitic sandstone-siltstone interbeds; evaporites, chert concretions; minor intraclast and oncoid dolostone, microbial dololaminite, dolomitic quartz sandstone.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock|continental rift|N||17-JAN-23
Antrim Plateau Volcanics|488|Antrim Plateau Basalts|487|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Kalkarindji Suite|75724|Middle Cambrian|505|2|isotopic, Ar/Ar|eruption|Early Cambrian|513|12|isotopic, U/Pb-Pb/Pb ion probe||30|1500|WA|No|44965|69445|||||Present name by Traves (1955). U-Pb SHRIMP age 513 +/- 12 Ma. Ar-Ar ages 505 +/- 2 and 508 +/- 2 Ma (Glass and Phillips, 2006). K-Ar age ~510 Ma. Of the Kalkarindji continental flood basalt province. Included in the Kalkarindji Suite in Oct 2009. Locally associated with minor copper mineralisation.|Massive and amygdaloidal tholeiitic basalt and basalt breccia; commonly capped by ferricrete. Agglomerate with brecciated flow tops. Minor sandstone and chert interbeds.|basic volcanic rock|sedimentary rock|intracratonic|N||21-SEP-23
Antrim Plateau Volcanics 2 - sandstone|70590|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||deposition|Early Cambrian||||||||No||||||||Quartzose and feldspathic sandstone, rare limestone |siliciclastic sedimentary rock|||N||17-JAN-23
Antrim Plateau Volcanics 3 - chert|70589|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||deposition|Early Cambrian||||||||No||||||||Laminated chert, limestone |non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Antrim Plateau Volcanics 4 - sandstone|70591|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||deposition|Early Cambrian||||||||No||||||||Interbedded sandstone and chert |siliciclastic sedimentary rock|||N||17-JAN-23
Antrim Plateau Volcanics 5 - sandstone|70592|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||deposition|Early Cambrian||||||||No||||||||Tuffaceous sandstone with angular chert and vesicular basalt fragments near base, minor dark grey chert interbeds |siliciclastic sedimentary rock|||N||17-JAN-23
Antrim Plateau Volcanics 6 - basalt|70585|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||eruption|Early Cambrian||||||||No||||||||Medium-grained porphyritic basalt with plagioclase phenocrysts |basic volcanic rock|||N||17-JAN-23
Antrim Plateau Volcanics 7 - agglomerate|70586|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||eruption|Early Cambrian||||||||No||||||||Agglomerate, highly weathered and lateritised in places |basic volcanic rock|||N||17-JAN-23
Antrim Plateau Volcanics 8 - agglomerate|70587|||||Yes|Member, phase|Unnamed|Variation of published name|Briefly described|Antrim Plateau Volcanics|488|||Early Cambrian||||eruption|Early Cambrian||||||||No||||||||Agglomerate |basic volcanic rock|||N||17-JAN-23
Anuma Schist|496|Anuma schist|27062|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic||||||||No|9199|||||||Kyanite-muscovite schist; overlain by intercalated mica schist with staurolite and kyanite, quartzofeldspathic gneiss; some calcareous rocks near top.|foliated metamorphic rock|||N||17-JAN-23
Apertawonga Monzogranite|73191|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Frederick Suite|40071|||||intrusion|||||||||No|62580||||||See also the informal variations: Apertawonga monzogranite and Apertawonga granite. Of the Frederick Suite. Hornblende biotite monzogranite in a non-magnetic, poorly defined pluton south of Tanami Mine.|Hornblende biotite monzogranite in a non-magnetic pluton.|acid intrusive rock|||Y||17-JAN-23
Aquarium Formation|513|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Tawallah Group|17902|||Statherian|1730||inferred, overlying unit|deposition|Statherian|1740||inferred, underlying unit|||200|NT|Yes|44306|65340|||NT SNSC|18-AUG-03|Defn on Tech File E/53-8. Redefinition by David Rawlings 2006. The redefinition also formalises the change of name for areas mapped as Aquarium Formation by Pietsch et al (1991) and Haines et al (1993) in the Batten Fault Zone to McDermott Formation (Rawlings 1999, Jackson et al 2000), and areas previously assigned to Sly Creek Sandstone on the Wearyan Shelf, now assigned to Wununmantyala Sandstone.|Glauconitic and dolomitic siltstone, shale, sandstone, dolomite; locally hornfelsed.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Aquitaine Formation|74208|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Wadeye Group|74204|||Bashkirian||||deposition|Bashkirian||||||||No|61542||||||Offshore equivalent of the onshore Point Spring Sandstone - named for a petroleum company and therefore does not adhere to stratigraphical rules/conventions. Geological province: onshore Bonapart Basin/Petrel-Sub-basin.|Fine- to coarse-grained sandstone with a few siltstone interbeds, grading up into siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Arabulja Volcanics|24163|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Orosirian|1814|3|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1819|8|isotopic, U/Pb-Pb/Pb ion probe|||700|NT|Yes|39624|49033|Stewart A.J.,Blake D.H.|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project. Age: 1819 +/- 8Ma (SHRIMP). Within the Hatches Creek Group (Lower Wauchope Subgroup).  Definition by D.H.Blake, 07-OCT-1983.|Felsic lava; minor interbedded welded and friable tuff, ashstone, agglomerate, possible ignimbrite, micaceous arenite.|acid volcanic rock|||N||17-JAN-23
Arafura Group|522|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Upper Devonian|||||Upper Devonian||||||||No|42056|||||||Shallow marine to non-marine interbedded mudstone, siltstone, sandstone and minor carbonate.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Aralka Formation|524|||||Yes|Formation, beds|Formal|Other new published name|Redefined|||||Ediacaran|||inferred, overlying unit|deposition|Cryogenian|658|5|isotopic, Re/Os|deposition||1020|NT|Yes|46865|46865|Preiss W.V., Walter M.R., Coats R.P. and Wells A.T.||Wells, A.T.|01-OCT-77|Unit redefined 29-SEP-2015 by Normington, V.J. and Donnellan, N, and data available here. Redefinition also to be published in: Normington and Donnellan, in prep. Characterisation of the Neoproterozoic stratigraphy of the northeast Amadeus Basin, Northern Territory. Northern Territory Geological Survey Report.  The depositional age(658 Ma) is inferred from Re-Os dating in Wallara 1.|Grey-green to red siltstone and shale; minor interbeds of fine-grained sandstone. Laminated to finely-bedded in metre to dekametre- scale bedsets, exposures are flaggy and platy. Occasionally calcareous or dolomitic|siliciclastic sedimentary rock|||N||17-JAN-23
Aralka Formation, Lower|83365|||||Yes|Member, phase|Informal|Variation of published name|Described|Aralka Formation|524||||||||||||||||No|73086|||||||Laminated, thinly-bedded fine-grained calcareous green siltstone interbedded with fine-grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Aralka Formation, Upper|83366|||||Yes|Member, phase|Informal|Variation of published name|Briefly described||||||||||||||||||No|73086|||||||Reddish-brown and green siltstone and thickly-bedded to massive sandstone.||||N||17-JAN-23
Archean granites 76507|76507|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoarchean|2500|||intrusion|Neoarchean|2530|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Archean granulite-facies metamorphics 76510|76510|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoarchean|2500||||Neoarchean|2600|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|High-grade metamorphic rocks, generally with granulite facies assemblages; includes granitic gneisses|high grade metamorphic rock|||N||17-JAN-23
Arco Formation|74209|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Wadeye Group|74204|||Bashkirian||||deposition|Bashkirian||||||||No|61542||||||Of Wadeye Gp - offshore equiv.of onshore Point Spring Sst. Variously overlies Sunbird+Tanmurra Fms.+ Kingfisher Shale. Named for a petroleum company and therefore does not adhere to stratigraphic rules/conventions.|Lower 62m-thick interval of interbedded siltstone and fine- to very coarse-grained sandstone; up to 5% recrystallised limestone grains, occcasional fossils and common calcite cement; below fine- to coarse- and rarely very coarse-grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Ardmore Chert Member|556|||||Yes|Member, phase|Formal|Other new published name|Briefly described|Thorntonia Limestone|18088|||Late Cambrian||||deposition|Middle Cambrian||||||||No|45079||||||See also Ardmore Chert. Name appears to have been dropped in NT - See "Ardmore Chert Member", but may still be in use in Qld? [CEB Sept 2011]|Regionally extensive layer of rubbly black to white banded and convoluted chert and chert breccia that is well developed in the Quita Creek area and crops out in the Ardmore Outlier|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Aremra Granodiorite|566|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Ambulbinya Supersuite|75900|Statherian||||magmatic crystallisation|Statherian|1762|6|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|No|39888|49036||||||Granodiorite, tonalite, diorite.|acid intrusive rock|intermediate intrusive rock||Y||17-JAN-23
Areyonga Formation|571|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|||||Cryogenian|660||inferred, geological correlation|deposition|Tonian|876|14|isotopic, U/Pb-Pb/Pb ICP-MS||10|500|NT|Yes|48838|48863|Preiss W.V., Walter M.R., Coats R.P., Wells A.T.||Wells, A.T.|31-OCT-77|Defined 1962,1965. Redefined on 1977 definition card & in J0301/05. Predominantly a NT unit? Correlative of Sturtian glacial succession of Adelaide Geosyncline where Rb-Sr dates have yielded an age of ~730Ma, but duration of the glaciation is now [2016] believed to be from ~720-660 Ma. Redefined 2015. To be published in: VJ Normington and N Donnellan, in prep. Characterisation of the Neoproterozoic stratigraphy of the northeast Amadeus Basin, Northern Territory. Northern Territory Geological Survey Report.|Dominated by glacial diamictite (tillite), with thin interbeds of sandstone, conglomerate, shale and siltstone, and dolostone.|siliciclastic sedimentary rock|||N||17-JAN-23
Arltunga Nappe Complex|605|||||Yes|Group, Suite|Informal|Structural term|Described|||||Mississippian|322|6|isotopic, K/Ar||Mississippian|358|7|isotopic, K/Ar|||||No|48880||||||A south-directed thrusting event c.430-300 Ma. Involves Palaeoproterozoic rocks including Cavenagh, Tommys Gap and Hillsoak Bore Metamorphics, Atnarpa Igneous Complex, and Cryogenian Heavitree Quartzite and Bitter Springs Formation. The Arltunga beds nomenclature (Beds, beds, Series, etc) is of a different age, Paleogene-Neogene, and the names are also different therefore use of both names is permissible, although not advisable.|metamorphic rocks, granitoids and small ultramafic intrusions, and sedimentary rocks.|metamorphic rock|||N||17-JAN-23
Arltunga beds|26353|Arltunga Beds|27320|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Miocene|11.5||||Miocene|20.5|||||30||No|60547||||||Arltunga Member (superseded) was a different unit than the informal Arltunga beds, which is considered probably equivalent to Waite Formation.|Arenaceous limestone, silicified limestone and pebbly sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Arnold Sandstone|30271|Arnold Sandstone Member|28334|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Collara Subgroup|35509|||Ectasian||||deposition|Calymmian|||||20|292|NT|No|44112||Young D.|24-APR-96|||To replace Arnold Sandstone Member. Also referred to as Arnold Formation (02/32193). This form of the name used ~1997 - 2001, but  Arnold Sandstone Member used in 2010 Walhallow-Brunette Downs-Alroy-Frew River, Northern Territory. 1:250 000 geological map series explanatory notes, SE 53-07, SE 53-11, SE 53-15, SF 53-03. NTGS returned to Arnold Sandstone in 2013.|Medium to coarse grained quartz sandstone; planar and trough cross bedded, lenticular thin quartz granule beds.|siliciclastic sedimentary rock|||N||06-SEP-23
Aroota Group|37960|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Cryogenian|||inferred, geological correlation||Cryogenian|||inferred, geological correlation||||NT|Yes|61404||Kruse, P.D.|30-JAN-03|Kruse, P.D.|30-JAN-03||Green-grey diamictite and laminated siltstone;minor quartz sandstone and arkose; locally capped by  dolomitic shale and lenticular dolostone. Blue-green diamictite with interbeds of varvite and siltstone; minor sandstone, arkose and dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Arrarra Gneiss|75503|Myra Falls Metamorphics|27515|||Yes|Formation, beds|Formal|Resvd name published|Defined|Nanambu Complex|27856|||Neoarchean|2640|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Neoarchean|2671|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|66683|67779|Hollis, J.A., Glass, L. (NTGS), Carson, C. (GA)|14-AUG-09|Munson, T., Glass, L., Beyer, E.|03-NOV-10|Previously known as part of the former Myra Falls Metamorphics. The contact relationships between the Kukalak and Arrarra Gneiss are not clear, due to poor exposure. A plausible relationship is that the Kukalak Gneiss protolith intruded the Arrarra Gneiss at 2530-2510Ma and the composite granitic package was transposed and interleaved by subsequent tectonism, probably during ca. 1865Ma tectonometamorphism.|Granitic gneiss in the type area preserves a well developed S2 gneissosity defined by quartzo-feldspathic and biotite-rich cm-scale layers, and by feldspars elongated within the fabric. Minor amphibolite.|metamorphosed acid igneous rock|high grade metamorphic rock||Y||17-JAN-23
Arrinthrunga Formation|632|Ninmaroo Formation|14173|||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Furongian|||inferred, biostratigraphic correlation|deposition|Furongian|||inferred, isotopic correlation|deposition|450|975|NT|No|44358|45052|||||SF53-11 and SE 53-12. Synonymous with former Meeta beds (ELKEDRA, SANDOVER RIVER, FREW RIVER, and AVON DOWNS). Maximum depositional age (U-Pb SHRIMP) ca. 825 Ma, but deposition considered to be late Cambrian.|Locally silicified medium- to thick-bedded evaporitic dolostone, limestone, minor quartz sandstone, siltstone, shale, marl and conglomerate.|carbonate sedimentary rock|siliciclastic sedimentary rock|continental rift|N||12-JUL-23
Arthur Creek Formation|645|Arthur Creek beds|646|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Narpa Group|37962|||Miaolingian|||biozone|deposition|Miaolingian|||biozone||42|720|NT|Yes|47035|60122|Freeman M.J. (NTGS)||Brakel, A.|25-OCT-83|Probably only occurs in NT. Thickness: 483m in TOBERMORY. Now incorporates part of the former Sandover beds of ELKEDRA, Marqua Formation and "Upper Hay River Formation Member 2" of TOBERMORY. Potential hydrocarbon source. Hosts the Barrow Creek 1 and Arganara phosphate deposits. Potential marine source rocks.|Foetid pyritic-carbonaceous black shale and laminated dolostone interval with minor dolomitic quartz sandstone and conglomerate; overlain by dolostone, limestone and minor quartzose dolostone and siliciclastic mudstone.|carbonate sedimentary rock|fine grained siliciclastic rock|continental rift|N||17-JAN-23
Arumbera Sandstone|668|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Pertaoorrta Group|15091|||Early Cambrian||||deposition|Ediacaran||||||2000||No|48639||||||Formerly Eninta Formation? This unit comprises two depositional successions which may be referred to as the Lower (Late Neoproterozoic) and Upper (Early Cambrian) Arumbera Sandstones, separated by a disconformity (RefID: 65233). Key reservoir in the Dingo and Orange gas fields in the Amadeus Basin.|Red-brown to purple-brown, thinly-bedded, fine- and medium-grained, ferruginous, micaceous feldspathic sandstone, with minor pebble conglomerate, micaceous siltstone and dolostone.|siliciclastic sedimentary rock|||N||17-JAN-23
Ascalon Formation|75075|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Goodwin Subgroup|75073|||Olenekian||||deposition|Olenekian|||||||NT|No|67370||Gorter, J.D. (Eni Australia), Nicoll, R.S. (GA)|19-MAR-09|||Of Mount Goodwin Subgroup (Gorter, Nicoll, et al. in prep. Mar2009).|Very fine to fine-grained very well sorted sandstone with traces of silt and clay minerals, carbonaceous specks and poor to fair visual and 'inferred intergranular' porosity|siliciclastic sedimentary rock|||N||17-JAN-23
Ashmore Volcanics|718|Ashmore Volcanic Beds|717|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Troughton Group|18608|||Bathonian|166|||eruption|Hettangian|201||||||WA|No|34363|||||||Altered basalt flows and claystone.|basic volcanic rock|||N||17-JAN-23
Atnarpa Igneous Complex|24166|Atnarpa Complex|738|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1651|47|isotopic, Rb/Sr|intrusion|Statherian|1719|24|isotopic, Rb/Sr||||NT|Yes|9199|48992|A.J.Stewart|08-JUN-78|Brown, M.|12-JUL-78|I-type granite. Age: ~1880 Ma. Ages: 1879+/-11Ma and 1873+/-11Ma (Zhao and Cooper 1992, in Maidment et al 2005) may reflect zircon inheritance rather than crystallisation age.|Tonalite, diorite, trondhjemite, granodiorite, granite and aplite. Grouped into 3 suites: (1) gabbro-diorite-tonalite-trondhjemite suite; (2) a low-Al tonalite-trondhjemite-granodiorite suite; (3) a younger tonalite suite.|acid intrusive rock|||Y|I-type|17-JAN-23
Atneequa Granite|79164|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Atneequa Granitic Complex|23344|Statherian|1743|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1743|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|68150||||||Its relationship to the Atneequa Suite and Atneequa Granitic Complex is unknown. On 100K mapsheet: ILLOGWA 6050.|K-feldspar megacrystic biotite granodiorite|acid intrusive rock|||Y||17-JAN-23
Atneequa Suite|41810|Atneequa Granitic Complex|23344|||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|69931||||||Geological Province: Arunta Inlier.|Strongly foliated to mylonitic intrusive rocks.|igneous intrusive rock|||Y||09-AUG-23
Attack Creek Formation|25768|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tomkinson Creek Group|18318|||Statherian||||deposition|Statherian|1752|26|isotopic, U/Pb-Pb/Pb ion probe||330|700|NT|Yes|33307|35771|Mendum J.R., Tonkin P.C. (submitted by D.E. Gardner)|25-MAY-77|Wells, A.T.||Age: 1752 +/- 26 Ma (U-Pb).|Massive to laminated dolostone and limestone(?);  laminated to thinly bedded siltstone and mudstone; chert; thinly bedded quartzose dolostone; microbialite, thin to medium beds of intraformational conglomerate.|carbonate sedimentary rock|||N||17-JAN-23
Attutra Metagabbro|23345|||||Yes|Formation, beds|Formal|Other new published name|Redefined|||Casper Suite|80344|Statherian|1786|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1786|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|1|1000|NT|Yes|49036|72516|R.D.Shaw|11-APR-83|Whelan, J.|15-NOV-18|Mafic intrusions contain reported PGE-Au-V mineralisation.|Metagabbro, metadolerite: fine to coarse-grained, aphyric with primary igneous textures locally preserved, rare amygdaloidal textures; undeformed to locally foliated. Rare norite; magnetite bearing.|metamorphosed basic igneous rock|||Y||17-JAN-23
Atula Quartzite|77206|||||Yes|Formation, beds|Informal|Other new published name|Mentioned||||||||||||||||||No|62595||||||Appears to be a reincarnation of Atula metamorphics (unit no. 21166), an obsolete name that was reserved but no longer required.|Quartzite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Atula calc-silicate|81853|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||Cambrian|||inferred, geological correlation||Cambrian|||inferred, geological correlation|||||No|72516||||||Variation on Atula Quartzite? or different unit?|||||N||17-JAN-23
Austral Downs Limestone|780|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Middle Miocene|||inferred, biostratigraphic correlation|deposition|Middle Miocene|||inferred, biostratigraphic correlation|||35|NT|No|44273|44285|||||See also Lexicon. SF54-5,9,14 etc. Together with Noranside Limestone thickness is 35m. Several references include this unit in the Georgina Basin but this much younger unit overlies Georgina Basin rocks. Lithologically identical with Brunette Limestone; distinguished geographically: this unit is within Georgina River drainage.|Brackish lacustrine and spring limestone and chalcedony overlying limestone and ferruginous detritus. characteristic features include rhizoliths and circum- and intragranular cracks.|carbonate sedimentary rock|||N||31-JUL-23
Auvergne Group|787|Yambarra Beds|20790|||Yes|Group, Suite|Formal|Other new published name|Defined|||||Neoproterozoic|635||inferred, geological correlation|deposition|Mesoproterozoic|1332|22|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|950|1900|NT|No|32310|48938|||||Most references give age as Neoproterozoic, but a few say Mesoproterozoic (as per unconformably underlying Tijunna Group). Victoria Basin.|Sandstone, siltstone, dolostone, conglomerate, dolarenite, shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Ayers Range Granite|39515|Ayers Ranges Adamellite|29278|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1152|3|isotopic, U/Pb-Pb/Pb, TIMS|intrusion|Mesoproterozoic|1159|17|isotopic, U/Pb-Pb/Pb ion probe|||||No|60678|61154|Edgoose, C.|24-OCT-03|Kruse, P.D.|24-OCT-03|Intruded by Alcurra Dolerite.[ ?? Article says intrudes Alcurra Dolerite]|Porphyritic clinopyroxene-hornblende-biotite monzonite and granodiorite|acid intrusive rock|||Y||17-JAN-23
Ayers Range and Kulgera Granites|76195|||||Yes|Formation, beds|Informal|Variation of published name|Unpublished|||Pitjantjatjara Supersuite|39078|Mesoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Musgrave Province. Porphyritic clinopyroxene-hornblende-biotite monzonite and granodiorite (Ayers Range Granite) and porphyritic hornblende-biotite granite and quartz monzonite (Kulgera Granite). Informal combined unit to be used for Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Porphyritic clinopyroxene-hornblende-biotite monzonite and granodiorite (Ayers Range Granite) and porphyritic hornblende-biotite granite and quartz monzonite (Kulgera Granite).|acid intrusive rock|||Y||17-JAN-23
Ayers Rock Arkose|81344|Ayers Rock arkose|818|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Neoproterozoic|||||Neoproterozoic||||||||No|70018||||||Amadeus Basin. Of Supersequence 4 in the southern Amadeus Basin.  Equivalent to Mount Currie Conglomerate. Correlable to Arumbera Sandstone in the northern Amadeus Basin.|||||N||17-JAN-23
Babylon Volcaniclastic Sediment|42062|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Statherian||||eruption|Statherian|1798|5||||||No|23809||||||Age: 1798+/-5Ma. Underlies Wiso Basin.|Unknown.||||N||17-JAN-23
Bacardi Granite|81823|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||Black Label Suite|81822||||||||||||||No|||Reno, B. (NTGS)|31-JAN-20|||To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Named for the Bacardi Bore. Nearest town is Alateye.|Hornblende-biotite granite; fine- to medium-grained, equigranular, melanocratic, rare allanite; fresh to moderately weathered; foliated to gneissic; mafic enclaves and country rock xenoliths locally present.|acid intrusive rock|||Y||17-JAN-23
Badalngarrmirri Formation|26360|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|Parsons Range Group|27873|||Statherian||||deposition|Statherian||||||2500|NT|Yes|44299|24048||||||Quartz sandstone: laminated and thin wavy bedded mudstone, siltstone and very fine grained sandstone; pyritic mudstone and sandstone; minor dolostone and chert|siliciclastic sedimentary rock|||N||17-JAN-23
Badalngarrmirri Formation, Marura Siltstone, Fleming Sandstone|72390|||||Yes|Subgroup|Informal|Variation of published name|Described|Parsons Range Group|27873|||Statherian||||deposition|Statherian||||||||No|||||||Informal grouping of units of the Parsons Range Group to be used for Northern Territory 1:1 million geological map, National Maps Project.|Quartz sandstone: medium to very thick bedded, fine to coarse grained, massive or cross bedded; laminated and thin wavy bedded mudstone, siltstone and very fine grained sandstone; pyritic, ferruginous, glauconitic mudstone and sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Badens Camp quartzite|79081|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||Ediacaran|||inferred, geological correlation||Ediacaran|||inferred, geological correlation|||||No|69383||||||Arunta Region, Irindina Province (Maidment 2005) PhD. RefID 69383.|||||N||17-JAN-23
Baiguridji Formation|26362|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Statherian|1599|11|inferred, overlying unit|deposition|Statherian|1626|9|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||400|NT|No|44299|43010|||||Formerly of McArthur Group. Age: Statherian.|Sandstone: commonly dolomitic, fine-grained, thin-bedded, flaggy; mudstone: dolomitic in part; tuffaceous mudstone: thin beds; rock types are interbedded, relative proportions vary across sheet area.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Baikal Supersuite|80342|||||Yes|Supergroup|Formal|Resvd name published|Defined|||||Statherian|1770||inferred||Orosirian|1794|6|inferred|magmatic crystallisation|||NT|Yes|71621|72516|Beyer, E. (NTGS)|29-NOV-17|Normington, V.|15-NOV-18|The Baikal Supersuite comprises voluminous I-type intrusions emplaced between ca. 1.79-1.77 Ga and grouped on the basis of similar chronology, isotopic character and geochemistry. It consists of the Mascotte Orthogneiss, Casper Suite and Fosters Suite.  Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin.|Voluminous I-type and bimodal intrusions. Granite, granodiorite, tonalite, metadolerite, metagabbro, orthogneiss.|acid intrusive rock|metamorphosed basic igneous rock||Y|I-type|17-JAN-23
Balbirini Dolostone|76089|Balbirini Dolomite|923|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Nathan Group|26072|||Calymmian|1589|3|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1613|4|isotopic, U/Pb-Pb/Pb ion probe|deposition||1500|NT|No|63112||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). Thus the type area of the Dolostone is the same as that for the Dolomite. Ages from RefID 23398 (2000). Ages given for various tuffaceous units in "Upper Balbirini Dolomite'  - 1589 +/-3 Ma, 'Lower Balbirini Dolomite' - as old as 1613 +/-4 Ma. U/Pb SHRIMP.|(Stromatolitic-) dololutite, dolarenite, dolomitic siltstone and shale, silty dololutite; diagnostic silicified ooid beds; pink tuff; conical, large columnar, stratiform and domical stromatolites.|carbonate sedimentary rock|||N||17-JAN-23
Balbirini Dolostone, 'lower'|81656|Balbirini Dolostone|76089|||Yes|Member, phase|Informal|Variation of published name|Briefly described|Balbirini Dolostone|76089|||Statherian||||deposition|Statherian||||deposition||||No|72373||||||This unit may be better reinterpreted as a new formation at the top of the McArthur Group, underlying Balbirini Dolostone sensu stricto (Haines et al 1999, Rawlings 1999).|||||N||17-JAN-23
Balbirini Dolostone, 'upper'|81657|Balbirini Dolostone|76089|||Yes|Member, phase|Informal|Variation of published name|Briefly described|Balbirini Dolostone|76089|||Calymmian|1589|3|isotopic, U/Pb-Pb/Pb ion probe|deposition|||||||||No|72373|||||||||||N||17-JAN-23
Balma Group|21185|McArthur Group|11512|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Calymmian|1599|11|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1620|21|isotopic, U/Pb-Pb/Pb ion probe|||5000|NT|Yes|71606|24048|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Kruse, P.D.|15-JUL-94|Age: Statherian.|A thick succession of mainly mudstone, carbonate and sandstone, with minor tuffaceous components in some Formations.|siliciclastic sedimentary rock|||N||17-JAN-23
Balma Group, Lower|72382|||||Yes|Subgroup|Informal|Variation of published name|Described|Balma Group|21185|||Statherian||||deposition|Statherian||||||||No|71632||||||Informal grouping of units in the lower Balma Group to be used for Northern Territory 1:1 million geological map, National Maps Project.  Includes Koolatong Siltstone, Strawbridge Breccia.|Mudstone, dolomitic siltstone, stromatolitic-evaporitic dolostone, sandstone, chert breccia|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Balma Group, Middle|72383|||||Yes|Subgroup|Informal|Variation of published name|Described|Balma Group|21185|||Statherian||||deposition|Statherian||||||||No|71632||||||Informal grouping of units in the middle Balma Group to be used for Northern Territory 1:1 million geological map, National Maps Project.  Includes Vaughton Siltstone, Conway Formation, Zamia Creek Siltstone.|Dolomitic mudstone (+/- carbonaceous), dolostone; minor pink chert beds (tuff?)|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Balma Group, Upper|72384|||||Yes|Subgroup|Informal|Variation of published name|Described|Balma Group|21185|||Statherian||||deposition|Statherian||||||||No|71632||||||Informal grouping of units in the upper Balma Group to be used for Northern Territory 1:1 million geological map, National Maps Project.  Includes Yarrawirrie Formation, Baiguridji Formation, Bath Range Formation.|Dolomitic siltstone, sandstone, dolarenite, chertified evaporitic-stromatolitic dolostone; minor conglomerate and pink chert beds (tuff?)|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Banyan Formation|25774|||||Yes|Formation, beds|Formal|Other new published name|Defined|Bullita Group|2914|||Calymmian||||deposition|Calymmian|||||||NT|No|32170|48942||||||Algal and oolitic limestone and dolomite; minor siltstone and sandstone|carbonate sedimentary rock|||N||17-JAN-23
Banyan Formation - chert|72400|||||Yes|Member, phase|Informal|Variation of published name|Described|Banyan Formation|25774|||Mesoproterozoic||||deposition|Mesoproterozoic||||||||No|||||||Lithology referring to an informal unnamed unit of the Banyan Formation to be used for Northern Territory 1:1 million geological map, National Maps Project.|Chert bands|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Baralandji Formation|38410|Tomkinson Creek beds|18320|||Yes|Formation, beds|Formal|Resvd name published|Defined|Renner Group|38406|||Calymmian||||deposition|Calymmian||||||700|NT|No|24304|24303|||||Reserved as Baralandji (Hussey, 1996). Previously mapped as undifferentiated Tomkinson Creek beds.|Fine- to medium-grained sandstone, siltstone and mudstone with minor coarse-grained sandstone and conglomerate. Comprises two major coarsening-upward units (Members) and a number of smaller-scale fining-upward cycles at the top of the Formation.|siliciclastic sedimentary rock|||N||17-JAN-23
Barkly Group|32954|Ranken Limestone|27886|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Middle Cambrian|||inferred, overlying unit|deposition|Middle Cambrian|||biozone||||NT|Yes|44283|64443|||Kruse, P.D.|07-JUN-05|See also Lexicon. SE53-16. Ref to Noakes & Traves 1947, 1951, 1954. Reinstated / revised definition of abandoned name by Kruse, P.D., after Noakes and Traves 1954 (07/06/05). Previously replaced by Ranken Lst, now redefined as parent of Ranken Lst. Georgina Basin, Undilla Subbasin (Geology of Queensland 2013, p88).|Peritidal to marine deposits: limestone, dolostone, siltstone, minor quartz sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Barney Creek Formation|1130|||||Yes|Formation, beds|Formal|Other new published name|Defined|Umbolooga Subgroup|18813|||Statherian|1638|7|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1640|3|isotopic, U/Pb-Pb/Pb ion probe|||700|NT|No|30345|45162|||||Defn on Tech File E/53-3.  Within the McArthur Group. Age: 1640+/-3 Ma; and, 1639Ma (U-Pb zircon (Southgate et al, 2000). Hosts McArthur River (formerly HYC) Zn-Pb-Ag stratiform deposit at the base of the HYC Pyritic Shale Member. Good potential hydrocarbon source rocks.|Thinly bedded to laminated, dolomitic, carbonaceous and pyritic shale and siltstone, dololutite, rare breccia and sandstone; occasional gypsum casts; talus slope breccia adjacent to Emu Fault. Locally abundant tuffs and breccias.|sedimentary rock|acid volcanic rock||N||17-JAN-23
Barramundi Metamorphics|35484|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||Barramundi Suite|41413||||||||||||||No|43281||||||Probably obsolete.|||||N||17-JAN-23
Barrow Creek Granite Complex|27283|Barrow Creek Granite|1201|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Orosirian|1809|5||intrusion|Orosirian|1830|6|||||NT|Yes|42643|42643|Bagas, L.|09-MAY-90|Kruse, P.D.|10-APR-90|First published as Barrow Creek Granite in Shaw et al (1984) RefID 39888.  This term should possibly be replaced by Barrow Creek Suite? (ref: emails P. Kruse and N. Donnellan to PP 31/7/06).|Biotite granite with porphyritic K-feldspar, and locally abundant enclaves and xenoliths, minor orthogneiss; and equigranular to porphyritic biotite and biotite-muscovite granite, respectively|acid intrusive rock|||Y||17-JAN-23
Bartalumba Basalt|21201|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Alyangula Subgroup|21122|||Statherian||||eruption|Statherian||||||400|NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Within the Groote Eylandt Group.|Deeply weathered, red and black, massive to vesicular and amygdaloidal basalt and microdolerite.|basic volcanic rock|||N||17-JAN-23
Bath Range Formation|1243|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Calymmian|1599|11|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1624|16|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||600|NT|No|44299|43010|||||Formerly of McArthur Group. Also stated to be present in the Habgood Group in northern McArthur Basin (2003). Age: 1600Ma.|Sandstone: fine to coarse-grained, lithic (chert clasts), commonly dolomitic; chert (silicified carbonate): relict peloidal and stromatolitic textures; tuffaceous mudstone: thin to thick-bedded.|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Bathurst Island Group|1249|Bathurst Island Formation|1246|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Maastrichtian|||biozone|deposition|Valanginian|||biozone|||||No|41459||||||Age limits inferred from ages of component Darwin Formation (base) and Wangarlu Formation (top). This name superseded Bathurst Island Formation, but the Formation may have been reinstated in ~2005 by NTGS?|Sublabile sandstone, siltstone, mudstone, conglomerate, conglomeratic sandstone, argillaceous siltstone; locally calcareous or unconsolidated; strongly weathered in outcrop with the development of a trizonal laterite profile.|siliciclastic sedimentary rock|||N||17-JAN-23
Batten Subgroup|1257|||||Yes|Subgroup|Formal|Variation of published name|Described|McArthur Group|11512|||Statherian|1614|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1625|2|isotopic, U/Pb-Pb/Pb ion probe|||1000||No|44287||||||Age: <1640 Ma.|Chertified evaporitic-stromatolitic dolostone, dolomitic siltstone, sandstone, pyritic-carbonaceous shale; minor pink chert beds (tuff?).|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Battle Creek Formation|1264|||||Yes|Formation, beds|Formal|Other new published name|Defined|Bullita Group|2914|||Calymmian||||deposition|Calymmian||||||179|NT|No|28255|48943|||||Unconformable beneath Tijunna Group units. Does not extend into Qld.|Dolostone, siltstone, shale, dolomitic sandstone, sandstone|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Bawaka Granite|79871|Bawaka granite|79828|||Yes|Formation, beds|Formal|Resvd name published|Described|||Nhulunbuy Suite|80477|Orosirian||||magmatic crystallisation|Orosirian|1872|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|71620||Whelan, J. (NTGS)|20-JUN-17|||Previously published as the Bawaka granite but has now been formally reserved. To be published = Definition card will be published in the Gove Special 1:100,000 explanatory notes.|Medium- to coarse-grained, equigranular to weakly porphyritic cordierite-garnet-biotite-bearing granite and foliated granite. Includes abundant metasedimentary and metaigneous xenoliths.|acid intrusive rock|||Y||17-JAN-23
Bean Tree Granite|24175|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Barrow Creek Granite Complex|27283|Barrow Creek Suite|33042|Statherian||||intrusion|Orosirian|1803|6|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|42643|42643|Haines P.W., Bagas L.|04-JUL-88|Kruse, P.D.|10-APR-90|Used on Barrow Creek and Alcoota 1:250 000 map sheets.  Age: 1803+/-6Ma.  Intrudes the Bullion Schist.|Biotite granite with porphyritic K-feldspar, and locally abundant enclaves and xenoliths; minor orthogneiss; and, equigranular to porphyritic biotite and biotite-muscovite granite, respectively.|acid intrusive rock|||Y||17-JAN-23
Beasley Knob Member|1322|Beasly Knob Member|1325|||Yes|Member, phase|Formal|Other new published name|Defined|Ranford Formation|15830|||Neoproterozoic||||deposition|Neoproterozoic||||||||No|39827||||||Correct place name spelling is Beasley. Variation Beasly Knob Member is still being published.|Quartz sandstone, conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Beatrice Island Limestone|1333|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Quaternary||||deposition|Cenozoic||||||||No|44530||||||In east Arnhem Land. See also the misspelt Beatrice Islands Limestone.|Fossiliferous, large-scale cross-bedded limestone; finely oolitic limestone|carbonate sedimentary rock|||N||17-JAN-23
Beef Hole Gabbro|83009|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Orosirian|||inferred|intrusion|Orosirian|1849.2|2.9|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|||Schofield, A, Clark, A.. (GA)|28-MAR-22|Munson, T. (NTGS)|25-NOV-22|Type section: Drill-hole DDH004, down-hold depth from 157.53 m to 252.20 m (EOH). Drilled at 609375mE and 7816424mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. Dark colour, mafic composition, medium-coarse grain size. Very high magnetic susceptibility in places. Originally considered part of the Mount Lamb Suite.|Light grey and black medium-grained, mafic intrusive rock. Plagioclase and amphibole are common in thin-section. Biotite and quartz are present locally.|basic intrusive rock|||Y||03-FEB-23
Beestons Formation|26378|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Manton Group|25203|||Orosirian|2026||inferred, overlying unit|deposition|Siderian|2506|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||300||No|44315|44314|||||Formerly of the Batchelor Group, and then of the Namoona Group.  See also Beestons Creek Formation. Maximum age from detrital zircon. Up to 300m thick. Fluvial Deposits. Rum Jungle Region.|Quartz conglomerate, feldspathic quartz sandstone, minor banded ironstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Beetle Creek Formation|1389|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone||15|126|QLD|No|44273|44210|||||Equivalent to Border Waterhole Formation in LAWN HILL 1:250 000 sheet area.|Calcareous and siliceous siltstone, shale and chert; sandstone, phosphorite, phosphatic siltstone, silicified coquinite, basal conglomerate; trilobite fossils.|siliciclastic sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||31-JUL-23
Belt Granite|41843|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|||inferred|intrusion|Statherian|||inferred, intrusive relationship||||NT|Yes|67565|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Intrudes Alkipi Metamorphics and unnamed felsic gneiss of the Yaya Metamorphic Complex. Intruded by Stuart Pass Dolerite (Warren and Shaw 1995).|Foliated, weakly porphyritic biotite and biotite-hornblende granite and granodiorite.|acid intrusive rock|||Y||17-JAN-23
Benalla Formation|23374|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Sahul Group|16515|||Norian||||deposition|Carnian|||||||WA|No|41532|42442|A.J.Mory|26-AUG-87|||Unit occurs in both Northern Territory and Western Australia.|Carbonate; minor shale and sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Benmara Group|42492|Benmara beds|1488|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Calymmian|1580||inferred, geological correlation|deposition|Statherian|1660||inferred, geological correlation|||380|NT|Yes|24442||Rawlings, D. (after Smith and Roberts, 1963)|11-APR-05|Kruse, P.D.|11-APR-05||Ferruginous to silicified, immature to mature, sublithic to lithic sandstone, trachyte, pebble conglomerate, ferruginous siltstone, minor stromatolitic chert|siliciclastic sedimentary rock|intermediate volcanic rock||N||17-JAN-23
Benning Gabbro|75949|Jarong Spring Gabbro|75537|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Statherian|||inferred|intrusion|Orosirian|1860||inferred, intrusive relationship||||NT|Yes|67232|67232|Glass, L. (NTGS)|12-MAY-11|Munson, T., Glass, L., Beyer, E.|03-NOV-10|Formerly included in Wangi Basics.|Metamorphosed high-Ti tholeiitic gabbro; equigranular assemblages of :qtz; plagioclase with highly sausseritised/sericitised cores and unaltered rims; cpx; brown/green hornblende; fibrous actinolite/tremolite  and uralitised hornblende common|basic intrusive rock|||Y||17-JAN-23
Berinka Volcanics|1503|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Finniss River Group|6669|Gerowie Suite|31730|Orosirian|1861|4|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1885|||||2000||No|46163||||||Described as part of Wingate Group in Hammond et al. (1984) 85/24777. Conformably overlain by Burrell Creek Formation, intruded by Ti-Tree Granophyre, other contacts faulted.|Metamorphosed to altered spherulitic dacite; sheared lithic tuff; agglomerate; silicified-sericitised feldspar-crystal tuff; porphyritic rhyodacite; interlayered siltstone and mudstone.|acid volcanic rock|||N||17-JAN-23
Bernborough Formation|1514|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Ooradidgee Group|39122|||Orosirian|1840|8|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1845|4|isotopic, U/Pb-Pb/Pb ion probe|||900||No|48891||||||Of the Flynn Subgroup.  Age: 1840+/-8Ma, 1845+/-4Ma (Compston 1991). Within the Tennant Creek Supersuite.|Felsic crystal-lithic tuff, lapilli tuff, ignimbrite, probable lava, chert; siltstone, shale, fine-grained lithic arenite/wacke.|acid volcanic rock|||N||17-JAN-23
Bessie Creek Sandstone|24715|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Maiwok Subgroup|25195|||Ectasian|1361|21||deposition|Calymmian|1422|20|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age|10|417|NT|No|46679|70968|||||Included in Maiwok Subgroup of Roper Group in Urapunga-Roper River 2nd ed. explan. notes. Occurs in the Beetaloo Sub-basin. Note a Re-Os date from the lower part of the overlying Velkerri Formation is 1417+/-29 Ma (Munson, 2016). The 1386 Ma age is from a single grain (Yang et al, 2018).|Quartz sandstone: fine to medium and locally coarse grained, trough cross-stratification, ripple marks.|medium-coarse grained siliciclastic rock|||N||08-SEP-23
Bickerton Rhyolite|30960|Bickerton Volcanics|1573|||Yes|Formation, beds|Formal|Variation of published name|Defined|Bustard Subgroup|21402|||Orosirian|1814|8||eruption|Orosirian|1814|8|isotopic, U/Pb-Pb/Pb ion probe|||250|NT|Yes|22808|22808|Rawlings D. J., Haines P.W., Pietsch B.A. (after Plumb & Roberts)|25-JUL-06|||To be used in the Arnhem Bay-Gove 1:250 000 sheet area. Within the Groote Eylandt Group. Part of the Bickerton Suite? Intrudes the Abarungkwa Sandstone|Red porphyritic, Kfeldspar rhyolite|acid volcanic rock|||N||17-JAN-23
Bickleys Porphyry|1575|||||Yes|Formation, beds|Formal|Other new published name|Described|||Paperbark Supersuite|31788|Paleoproterozoic|1850|||intrusion|Paleoproterozoic|1865|||||||No|44366|||||||Grey fine grained quartz feldspar porphyry and porphyritic micromonzogranite, in places foliated; a phase contains pink feldspar phenocrysts in places.|acid intrusive rock|||Y||17-JAN-23
Big Knob beds|41376|Big Knob Beds|1593|||Yes|Formation, beds|Informal|Variation of published name|Described|Duerdin Group|5760|||Neoproterozoic|||||Neoproterozoic||||||||No|60006||||||Thickness: >20m.|Quartzose and lithic sandstone, polymict conglomerate. Outcrops as knolls and ridges.|siliciclastic sedimentary rock|||N||17-JAN-23
Big Sunday Formation|25685|||||Yes|Formation, beds|Formal|Resvd name published|Defined|El Sherana Group|24261|David Suite|72698|Orosirian|1825|||deposition|Orosirian|1829|5|inferred, underlying unit|||480|NT|Yes|39679|43718|P.G.Stuart-Smith|11-FEB-82|Brakel, A.|13-JUL-83|Volcanic parts are included in the Jim Jim (now David) Suite|Interbedded volcanolithic to arkosic sandstone, volcanic siltstone and amygdaloidal, commonly porphyritic basalt in lower section; rhyolite and rhyolitic ignimbrite in upper section|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Bigie Formation|1621|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Myally Subgroup|13635|Fiery Suite|38573|Statherian|1700|||deposition|Statherian|1762|18||maximum depositional age||800|QLD|Yes|37459|37459|I.H.Wilson, G.M.Derrick|08-OCT-80|Whitaker, W.|24-JUL-81|Age updated by NABRE project. Defn card held [CEB Jul 2002]. Previously included in Fiery Creek Volcs and 'Myally Beds'. Maximum depositional age 1762+/-18 Ma, from Geology of Queensland 2013, p56. High-permeability aquifer. part of the Big Supersequence.|Purple-brown hematitic labile sandstone, pebbly sandstone, tuff, conglomerate, red-brown siltstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Bigrlyi Member|31356|Bigrlyi Sandstone Member|21245|||Yes|Member, phase|Formal|Resvd name published|Described|Vaughan Springs Quartzite|19064|||Cryogenian||||deposition|Cryogenian||||||200||No|44158||||||Mount Doreen 1:250 000 sheet.|Quartz sandstone, minor siltstone; conglomerate; typically granules, pebbles and cobbles of quartzite and vein quartz; local concentrations of corroded magnetite crystals.|siliciclastic sedimentary rock|||N||17-JAN-23
Bilba Hills Granite|70541|Bilba|39112|||Yes|Formation, beds|Informal|Resvd name published|Mentioned|||||||||intrusion|||||||||No|62378||||||Reserved as Bilba by N.Donellan of the NTGS (2003) - not known if published by originator yet (PP 07/06). .|Granite.|acid intrusive rock|||Y||17-JAN-23
Billabong Complex|42069|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Neoarchean|2514|3|isotopic, U/Pb-Pb/Pb ion probe||Neoarchean|2532|3||||||No|61056||||||Possible source of Archean detrital zircons in Ferdies Member of the Dead Bullock Formation, Tanami region. See also Billabong complex.|Strongly foliated, upper amphibolite facies biotite gneiss, coarse-grained augen gneiss.|high grade metamorphic rock|metamorphosed acid igneous rock||Y||17-JAN-23
Billicumidji Rhyolite Member|1637|||||Yes|Member, phase|Formal|Other new published name|Defined|Cliffdale Volcanics|4151|||Orosirian|1851|3||eruption|Orosirian|1851|3|||||QLD|Yes|35640|49001|Mitchell J.||Staines, H.R.E.|24-JUN-76|1976 Defn card held [CEB Jul 2002]. Type section crosses Qld/NT border. Conformable within parent unit.|Alkali rhyolite lava, red, flow-banded, with numerous ashfall tuff horizons.|acid volcanic rock|||N||17-JAN-23
Bills Formation|83015|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Statherian|1652|24|inferred, overlying unit|deposition|Orosirian|||inferred|maximum depositional age|||NT|Yes|||Clark, A. (GA)|28-MAR-22|Munson, T. (NTGS)|25-NOV-22|No local features in vicinity of type interval. Name conveys some information regarding drilling conditions encountered within this unit. Type locality: Drill-hole NDIBK07 from down-hold depth 151.42 to 275.5 m (EOH). Collar at 641523mE and 7877108mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. This unit is predominantly distinguished by its detrital zircon maximum depositional age (see below) and unique detrital zircon age spectrum, both of which are markedly different from data obtained from the overlying Hinkler Conglomerate, or any other rocks so far encountered at East Tennant (Koscitcin/Cross et al. in prep).|Upper interval (151.42?234.48 m) of massive- to moderately-bedded lithic arenite and pebble-cobble conglomerate and lower interval (234.48?275.5 m) of clast-supported sedimentary breccia, cataclasite and quartz-calcite fault infill.|medium-coarse grained siliciclastic rock|metasedimentary rock||N||27-APR-23
Bingy Bingy Basalt Member|1693|Bingy Bingy Member|1694|||Yes|Member, phase|Formal|Other new published name|Defined|Antrim Plateau Volcanics|488|||Early Cambrian||||eruption|Early Cambrian||||||40|NT|No|28255|48943||||||Medium-grained porphyritic basalt with plagioclase phenocrysts; agglomerate.  Highly weathered and laterised.|basic volcanic rock|||N||17-JAN-23
Birdum Creek beds|1722|Birdum Creek Beds|26394|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Middle Miocene|9|||minimum depositional age|Middle Miocene|||inferred|||20||No|36335||||||Formerly part of Winnecke Creek Tableland formation. Overlies Wiso Basin.|Hard, white, nodular fossiliferous limestone, soft chalky limestone, with locally developed opaline nodules, intervals of chalcedony and layers with abundant quartz sand.|carbonate sedimentary rock|||N||17-JAN-23
Birksgate Complex|29906|Birksgate Granitic Complex|1734|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Mesoproterozoic|1300||||Statherian|1605|6|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|43052||||||Fregon Domain, Musgrave Province. Connection to Birksgate Granitic Complex assumed. Volcanosedimentary protoliths of ages: ~1550 and 1300 Ma.  Many rocks in the Birksgate Complex are also in the Pitjantjatjara Supersuite. In W.A. this unit has also been referred to as Birksgate Metamorphics - to be renamed in updated version of the BELL ROCK map sheet.|Granulite to amphibolite facies quartzofeldspathic gneiss and paragneiss, locally migmatitic; granitic augen gneiss, locally mylonitic; felsic to ultramafic orthogneiss; leucogranite layers; garnet-sillimanite gneiss; staurolite gneiss; iron formation|high grade metamorphic rock|||Y||14-AUG-23
Birraduk Amphibolite|76182|Zamu Dolerite|27310|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic|||inferred||Orosirian|||inferred, intrusive relationship||||NT|Yes|67779|67779|Glass, L.M., Hollis, J.A. (NTGS)|03-OCT-11|Beyer, E., Normington, V.|09-SEP-14|Replaces Zamu Dolerite (of Ferguson and Needham 1978) in part. Occurs within Cahill Formation and Nourlangie Schist in northwestern Myra Falls Inlier, also intersected in drill core along fault systems in nearby Kombolgie Subgroup.|Fine-grained amphibolite with strong schistosity. Foliation defined by hornblende and biotite (which encircles elongate feldspar). Often garnet-bearing.|high grade metamorphic rock|||Y||17-JAN-23
Birrindudu Group|1735|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Calymmian|1560|20|isotopic, Rb/Sr|deposition|Statherian|1735|||||6000|NT|No|32659|45140|||||Based on lithological and structural similarities the Supplejack Downs Sandstone (formerly of Ware Group) is now included in this group (RefID: 63261). Latest age control (summarised, 2008, by http://www.nt.gov.au/d/Minerals_Energy/Geoscience/index.cfm?header=Victoria%20and%20Birrindudu%20Basins) suggest Birrindudu Basin ranges from 1700-1640 Ma.  Equivalent of Tolmer Group. Hosts U and REE's in the Killi Killi Hills.|Sublithic arenite, quartz arenite,siltstone, shale, conglomerate,stromatolitic chert, limestone,glauconitic sandstone. Marine to fluvial sediments.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Birthday Suite|38833|Winnecke Suite|41159|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Orosirian|1810||isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1825||isotopic, U/Pb-Pb/Pb ion probe|||||No|64662||Crispe, A.|06-AUG-03|||SF52-03. Tanami mine area. Originally reserved by Puquan Ding (1996) as Birthday Creek Group (now obsolete). See also Mount Winnecke Suite.|Biotite hornblende granodiorite: I-type, medium to coarse, strong magnetic response; biotite hornblende granite: I-type, porphyritic, medium to coarse, weak magnetic response.|acid intrusive rock|||Y|I-type|17-JAN-23
Bitter Springs Group|79261|Bitter Springs Formation|1758|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Tonian|767|130|isotopic, U/Pb|deposition|Tonian|896|24|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000|NT|Yes|70762||Normington, V., Donnellan, N. (NTGS)|28-SEP-15|Whelan, J., Normington, V.|09-NOV-15|Upgrade of Bitter Springs Formation to Group rank. CONSTITUENT UNITS (from base to top): Gillen Formation, Loves Creek Formation, Johnnys Creek Formation. Age from correlation of basalt in Johnnys Creek Formation with Amata Dolerite (824+/-4 Ma). New work gives a  maximum depositional age of 896 +/- 24 Ma for detrital zircon U-Pb SHRIMP sampled from informal member 3 of the Gillen Formation (Kositcin et al 2014), which is considerably older than the inferred deposition of 820 Ma for the Bitter Springs Group. Amadeus Basin, Centralian Superbasin.|Dolomite, stromatolitic dolomite, siltstone, and sandstone; evaporitic in subsurface. Limestone, siltstone, mudstone.|carbonate sedimentary rock|||N||17-JAN-23
Black Label Suite|81822|||||Yes|Group, Suite|Reserved|Reserved|Reserved||||||||||||||||||No|||Reno, B. (NTGS)|31-JAN-20|||To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Named for the Black Label Bore. Closest town is Alateye.|Granite, metadolerite.|acid intrusive rock|metamorphosed intermediate igneous rock||Y||17-JAN-23
Black Point Sandstone Member|1807|||||Yes|Member, phase|Formal|Other new published name|Defined|Bullo River Sandstone|26436|||Cryogenian||||deposition|Cryogenian|1018|13|isotopic, U/Pb-Pb/Pb ion probe|||60|NT|No|32699|48938||||||Reddish brown feldspathic quartz sandstone, minor conglomerate.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Black Stump Arkose|1843|Field River Beds|6636|||Yes|Formation, beds|Formal|Resvd name published|Defined|Keepera Group|9375|||Cryogenian|||inferred, geological correlation|deposition|Cryogenian|||inferred, geological correlation|||700|NT|Yes|8217|48990|Walter M.R.||Passmore, V.L.|26-MAY-80|Defn gives first ref as BMR Journal 4(1), Burek et al (1979). Type section on HAY RIVER sheet. See also Geology of Queensland 2013, p94.|Red-brown to purple-brown micaceous fine to very coarse (to pebbly) arkose, sandstone, laminated micaceous mudstone and siltstone.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Blackfella Rockhole Member|1854|||||Yes|Member, phase|Formal|Other new published name|Redefined|Antrim Plateau Volcanics|488|||Early Cambrian||||eruption|Early Cambrian||||||100|WA|No|28255|41840|||||Fine grained basalt and basaltic breccia. Kalkarindji Province.|Interbedded basalt and agglomerate, minor intercalated sandstone and siltstone.|basic volcanic rock|||N||17-JAN-23
Blackfellow Creek Sandstone|27109|||||Yes|Formation, beds|Formal|Other new published name|Defined|Duerdin Group|5760|||Ediacaran||||deposition|Cryogenian|||||||NT|No|32699|48938||||||Massive to thinly-bedded, medium-grained quartzic sandstone; abundant sole-marks and ripples.|siliciclastic sedimentary rock|||N||17-JAN-23
Blackjack kimberlite|36761|||||Yes|Formation, beds|Informal|Other new published name|Briefly described||||||||||||||||||No|23772||||||In the North Australian Craton. Informal name with no relation to other Blackjack or Black Jack nomenclature of NSW or Queensland.|Highly weathered and ferruginised kimberlite dyke.|exotic composition igneous rock|||Y||17-JAN-23
Blanche Creek Member|1896|||||Yes|Member, phase|Formal|Resvd name published|Defined|Hayward Creek Formation|8199|||Statherian||||deposition|Statherian|||||||NT|Yes|33307|35771|Mendum J.R., Tonkin P.C. (per D.E. Gardner)|25-MAY-77|Wells, A.T.||In the Tennant Creek region.|Widespread but localised, poorly sorted lithic sandstone and polymictic conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Blatherskite Quartzite Member|1931|Blatherskite Member|73768|||Yes|Member, phase|Formal|Other new published name|Defined|Heavitree Formation|8223|||Neoproterozoic||||deposition|Neoproterozoic|||||||NT|Yes|35102|48992|Clarke D.B., Shaw R.D.|01-JAN-70|Branch, C.T.|01-DEC-79||Well-sorted, very fine to medium-grained quartz sandstone with rare silty interbeds. Mainly medium to thick-bedded, but includes some thin beds in the lowermost and uppermost parts.|siliciclastic sedimentary rock|||N||17-JAN-23
Blazan Shale|1937|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Narpa Group|37962|||Undillan|||biozone|deposition|Middle Cambrian|||biozone|||60||No|44273||||||Interfingers with Quita Formation.|Siltstone, shale, thin-bedded chert, fine-grained sandstone and rare beds of bituminous limestone. Basal conglomerate. Interfingers with Quita Formation.|siliciclastic sedimentary rock|||N||17-JAN-23
Bleechmore Metamorphics|79086|Bleechmore Granulite|40801|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Paleoproterozoic|||||Paleoproterozoic|1822|11||maximum depositional age||||No|69917||||||Central Arunta Region, Aileron Province. U/Pb SHRIMP zircon dating, Hf analytical data. 1822+/-11 Ma is maximum depositional age for the precursor sedimentary rock. Subsequently affected by Strangways Event and Chewings Orogeny. See also Mount Bleechmore Granulite, also used 2013.|Mafic granulite; migmatitic metapelite.|high grade metamorphic rock|||N||17-JAN-23
Bloods Range Formation|36765|Bloods Range beds|29413|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Tjauwata Group|36772|||Neoproterozoic|||inferred, overlying unit|deposition|Mesoproterozoic|||inferred, underlying unit|||100|NT|Yes|50321|65256|C.J. Edgoose, D.F. Close||Kruse, P.D.|21-JAN-02|Name not originally reserved. This unit also occurs near Mt Bertreaux (along Wankari Detachment Zone). Underlies Amadeus Basin sediments.|Red shales, polymictic conglomerate, sandstone, siltstone; tuffaceous horizons and local lensoidal quartz sandstone beds; felsic and mafic schist derived from volcanic rock, schistose quartz conglomerate.|metasedimentary siliciclastic rock|metamorphosed igneous rock||N||17-JAN-23
Bloodwood Formation|1963|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Middle Cambrian||||deposition|Early Cambrian||||||270|NT|No|30258|45155|||||At least 270m thick. Fossils include sea pens, molluscs and trace fossils. Deposited in a shallow marine to intertidal depositional environment.|Dark red-brown, sparsely fossiliferous mudstone and minor, red-brown, fine-grained, sometimes micaceous thinly bedded sandstone. Some intraformational breccia occurs in the basal part.|siliciclastic sedimentary rock|||N||17-JAN-23
Bludells Dolerite|1981|Bludells Monzonite|1982|||Yes|Formation, beds|Formal|Variation of published name|Described|||Cullen Supersuite|30778|Orosirian|1840|||intrusion|Orosirian|1860||||||NT|No|42756||||||Represents the remainder of Bludells Monzonite after revision of non-doleritic elements to Driffield Granite. Remnants of dolerite in Cullen Batholith granites.|Altered quartz dolerite and fine- to medium-grained diorite; pyroxene-bearing monzonite, monzodiorite and quartz syenite.|basic intrusive rock|intermediate intrusive rock||Y|I-type|17-JAN-23
Blue Hole Formation|1990|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian|1636|5|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1639|7|isotopic, U/Pb-Pb/Pb ion probe|||330|NT|No|28255|48943||||| Age: 1636 +/- 5Ma [on what basis? SHRIMP dating of tuffite in this unit?]. See also [misspelling] Bluehole Formation. Birindudu Basin.|Siltstone, silty dolostone, dolarenite, dolomitic mudstone and siltstone, dololutite, minor orange tuffite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Bluebush Metamorphics|75904|Bluebush metamorphics""|79281|||Yes|Formation, beds|Formal|Resvd name published|Described|||||Statherian|1743|7|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Orosirian|1827|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|68997||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas. Maximum depositional age of sedimentary protolith, from detrital zircons. Granulite facies metamorphism occurred at 1757 +/- 6 Ma.|Granulite-facies metasedimentary rocks; includes pelitic diatexite.|high grade metamorphic rock|||N||17-JAN-23
Boggy Hole Gneiss|21279|Boggy Hole gneiss|30752|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|Madderns Yard Metamorphic Complex|29769|||Statherian|1648|10|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1648|10|isotopic, U/Pb-Pb/Pb ion probe|||||No|69925||Shaw R.D.|08-OCT-91|||Defn card with State Convener (advised 2-Oct-91). Note on revised card - NLR. To be used on Hermannsburg 1:250 000 sheet as informal Boggy Hole gneiss?|Deformed megacrystic quartzofeldspathic gneiss|foliated metamorphic rock|||N||09-AUG-23
Boko Formation|24190|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Keepera Group|9375|||Cryogenian|||inferred, geological correlation|deposition|Cryogenian|||inferred, geological correlation||20|30|NT|Yes|42643|42643|Haines P., L.Bagas|17-DEC-87|Kruse, P.D.|10-APR-90|Definition by P.W. Haines.|Massive diamictite interpreted as a tillite. Clasts, up to 2 m diameter, often faceted and striated. Clast types include quartzite, granite, and various volcanics and metamorphics. The rarely exposed matrix consists of red-brown poorly-lithified mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Bonanza Creek Formation|33182|McCaw Formation|11530|||Yes|Formation, beds|Formal|Resvd name published|Defined|Katherine River Group|9312|||Statherian|1720||inferred|deposition|Statherian|1740||inferred|||85|NT|No|22538|24050|Brakel A.T.|30-NOV-98|Beier, P.|30-NOV-98|Mount Marumba 1:250 000 sheet area. New unit formerly mapped inconsistently as parts of both Shadforth Sandstone and McCaw Formation.Tentatively correlated with Aquarium Formation on the basis of similar lithofacies (2006 Robinson River Explan Notes.)|Very fine- to fine-grained sandstone; glauconite common in some beds. Also described as fine- to medium-grained laminated quartz sandstone, cross-bedded and massive in places, medium to thickly bedded fine-grained sandstone, medium to coarse laminae.|siliciclastic sedimentary rock|||N||17-JAN-23
Bonaparte Formation|2161|Bonaparte beds|2164|||Yes|Formation, beds|Formal|Variation of published name|Defined|Langfield Group|10161|||Tournaisian|||inferred, biostratigraphic correlation|deposition|Upper Devonian|||inferred, biostratigraphic correlation|||279|WA|No|41839|40993|||||Offshore shale and siltstone equivalent of Langfield and Ningbing Groups, also Cockatoo Group equivalent. See also Bonaparte Formation, Upper and Bonaparte Formation, Lower. Divided into upper and lower parts on the basis of palynological assemblages.|Shale, siltstone, dolomitic sandstone and quartzitic limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Bond Springs Gneiss|35951|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Paleoproterozoic|||||Paleoproterozoic|1620|70|isotopic, Rb/Sr||||NT|Yes|9199||L.Offe|04-NOV-75|Brown, M.C.|31-OCT-78|Definition card for Bond Springs gneiss but applies equally to capitilised Bond Springs Gneiss.|Quartzofeldspathic gneiss, garnet-muscovite gneiss, banded biotite gneiss, amphibolite, muscovite schist|foliated metamorphic rock|||N||17-JAN-23
Bone Creek Sandstone|30417|Bone Creek Formation|2169|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Mount Rigg Group|13064|||Calymmian|1590|||deposition|Statherian|1610|||||180||No|43149|||||||White, medium to thickly bedded, cross-bedded medium to coarse quartz sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Bonrook Granite|27638|Cullen Granite|4989|||Yes|Formation, beds|Formal|Variation of published name|Described|||Allamber Springs Suite|31739|Paleoproterozoic|1825|||intrusion|Paleoproterozoic|1825|||||||No|39679||Needham, R.S.|13-JUL-83|||Of Cullen Batholith. Pine Creek Province. Intrudes Burrell Creek Formation. previously included in Shoobridge Suite. Included in Allamber Springs Suite in 2013 Geology and Mineral Resources of NT. See also Bonbrook Granite - probably a misspelling of Bonrook.|Pink to grey, fine- to medium-grained porphyritic to equigranular biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Bonya Metamorphics|28387|Bonya metamorphic complex|24193|||Yes|Formation, beds|Formal|Variation of published name|Redefined|||||Statherian|1786|4|inferred, intrusive relationship|metamorphism|Orosirian|1807|21|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|42770|72516|||Normington, V.|12-OCT-18|Pb age of stratabound Jervois lodes 1790+/-15 Ma.  Variation of Bonya Schist, used only by  Warren (1994,1995).  See also Bonya Hills Metamorphics. Name to be revived to replace Bonya Schist in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. Replaced Bonya Schist in 2015: see RefID 70303.|Porphyroblastic schists. Mica schists. Mica-bearing metasandstones. Garnet schists. Quartz-magnetite-hematite rocks and tourmalinites. Abundance varies in Bonya Hills and Jervois mineral field.|metamorphosed igneous rock|||N||17-JAN-23
Boomerang Formation|82055|Surprise Creek Formation|17551|||Yes|Formation, beds|Formal|Resvd name published|Defined|Carrara Range Group|3679|||Statherian|||||Statherian|1725||||300|450|NT|Yes|||Simmons. J. (NTGS)|02-OCT-20|Munson, T. (NTGS)|01-JUN-23|The definition of the Surprise Creek Formation should be retained for all outcrops mapped as such in Queensland. However, all outcrops of 'Surprise Creek Formation' in the Northern Territory should be redefined as Boomerang Formation. Named for Boomerang Creek on MOUNT DRUMMOND. Nearest town = Camooweal. The Boomerang Formation (named after Boomerang Creek in MOUNT DRUMMOND) is a new name to describe outcrop of the Surprise Creek Formation in the Northern Territory. The Surprise Creek Formation represents a siliciclastic sedimentary succession that was previously interpreted to stretch from Queensland into the Northern Territory. However, it is unclear whether outcrop of the Surprise Creek Formation in Queensland is genetically related to outcrop in the Northern Territory, due to the large distance between the type section of the Surprise Creek Formation in Queensland and mapped exposures in MOUNT DRUMMOND (Northern Territory). There is also no intervening outcrop of the Surprise Creek Formation between the type section in Queensland and mapped exposures in MOUNT DRUMMOND (Northern Territory). This formation name will be published in a revised geological map of MOUNT DRUMMOND (Northern Territory) in 2021. The following publications are anticipated: Simmons JM, Williams B, Carson C, Verdel C, in prep. Mount Drummond, NT (Third Edition). 1:250 000 Geological Map, Sheet SE 53-12. Northern Territory Geological Survey, Darwin. Simmons JM, Williams B, Carson C, Verdel C, in prep. Mount Drummond, NT (Third Edition). 1:250 000 Geological Map Series Explanatory Notes, Sheet SE 53-12. Northern Territory Geological Survey, Darwin.|Basal lenses and beds of pebble to boulder conglomerate, interbedded with and overlain by sublithic to quartz sandstone. The conglomerate consists of sub-rounded to rounded pebbles and cobbles, and scattered boulders of quartz, pink quartzite and qtz sst.||||N||02-OCT-23
Boothby Orthogneiss|28156|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Napperby Suite|30862|Orosirian|||||Orosirian|1806|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|8222|48992|Warren R.G., Stewart A.J., Glikson A.Y.|30-APR-73|Brown, M.C.|06-MAR-79|Originally reserved as granite.  Age: Rb-Sr Whole Rock 900+/-150ma (in 1977). Crystal age: 1806+/-4Ma.|Coarse porphyritic granitic augen gneiss with mantled feldspar. Contains occasional xenoliths of coarse grained cordierite rich granofels.|foliated metamorphic rock|||Y||17-JAN-23
Boothby orthogneiss|84060|Boothby Orthogneiss|28156|Boothby Orthogneiss|28156|Yes|Formation, beds|Informal|Variation of published name|Mentioned||||||||||||||||||No|74204||||||Hosts flourapatite veins containing REE mineralisation at Nolans Bore deposit. Also referred to as Boothby granitic gneiss p4 in RefID 74204.|||||N||
Bootu Formation|32406|Bootu|30255|||Yes|Formation, beds|Formal|Resvd name published|Redefined|Tomkinson Creek Group|18318|||Statherian|1780|||deposition|Statherian|1780||||2000|2200||No|23410|24303|Hussey K.|24-APR-96|||Helen Springs,Tennant Creek 1:250 000 sheet areas. Previously mapped as uppermost part of Attack Creek Formation, with which it is transitional. Age: <1780Ma. Hosts numerous Manganese deposits, including the Bootu Creek mine.|Medium- to very coarse-grained sandstone and pebbly sandstone; minor thinly bedded siltstone and mudstone; calcareous siltstone and sandstone; minor carbonaceous shale and manganiferous sandstone, stromatolites and halite pseudomorphs.|siliciclastic sedimentary rock|||N||17-JAN-23
Border Creek Formation|2314|Border Creek Member|2316|||Yes|Formation, beds|Formal|Other new published name|Defined|Wadeye Group|74204|||Stephanian||||deposition|Westphalian||||||||No|45038|45038|||||Also Defn on Tech File D/52-14. Has been used for Waggon Creek Fm+Point Spring Sst. Onshore unit of Wadeye Gp. Regarded as part of Point Spring Sst by Mory and Beere(1988) but actually overlies it; onshore equiv. of Kuriyippi Fm. Formerly of Point Spr Sst. See also Point Spring Sandstone.|Quartz sandstone, conglomerate, siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Border Waterhole Formation|2321|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|Narpa Group|37962|||Cambrian Series 2||||deposition|Cambrian Series 2|||||30|180|QLD|Yes|44211|44274|||Munson, T. (NTGS)|01-JUN-23|Of Stewart and Mitchell (1987); Lindsay and Brasier (2006). Includes small phosphate deposits.|Siliceous shale, siltstone, chertified limestone, bedded to nodular chert; basal quartz-lithic sandstone, granule to pebble conglomerate.|carbonate sedimentary rock|||N||02-OCT-23
Bortala Formation|2347|Myally Beds|13628|||Yes|Formation, beds|Formal|Resvd name published|Defined|Myally Subgroup|13635|||Statherian||||deposition|Statherian|1773|2||||700|QLD|Yes|30529|30534|Derrick G.|21-APR-75|Staines, H.R.E.|18-MAR-76|Formerly included in Myally Beds. Defined 1976. Within the Haslingden Group.|Flaggy, fine feldspathic siltstone, micaceous siltstone, dolomitic sandstone, tuffaceous siltstone, grey-green chert.|siliciclastic sedimentary rock|||N||17-JAN-23
Boundary Igneous Complex|80341|Jervois Granite|28624|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1746|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1769|14|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|71621|72516|Beyer, E. (NTGS)|29-NOV-17|Edgoose, C., Normington|31-OCT-18|Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. Poorly outcropping granitoids with complex intrusive relationships. Previously included in Jervois Granite.|Biotite granite, leucogranite, biotite granodiorite: fine to medium-grained, equigranular to strongly porphyritic; undeformed to moderately foliated.;|acid intrusive rock|||Y|I-type|17-JAN-23
Bow River Granite|2394|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Paperbark Supersuite|31788|Orosirian|1834|32|isotopic, Rb/Sr|intrusion|Orosirian|1853|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|44317||||||On Bow 100K map (GSWA, 1999) superseded by Paperbark and Sally Down Supersuites? Proposed this be redefined as Bow batholith, reflecting the diversity of granitoid rocks - will incl: Sally Downs, Violet Valley Tonalites, some of Mabel Downs. But published as Bow River Granite on Auvergne 100K and 1:250k maps (NTGS, 2000, 2006, 2015), and in GSWA Kimberley update 2013., perhaps with modified distribution?|Typically a pink to green-grey, coarsely crystalline and porphyritic biotite granite; phenocrysts of K-feldspar locally displaying rapakivi textures.|acid intrusive rock|||Y||17-JAN-23
Bowgan Sandstone|37730|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wild Cow Subgroup|37739|||Mesoproterozoic|1450|||deposition|Mesoproterozoic|1652|10|isotopic, U/Pb||||NT|No|24442|65337|Rawlings, D.|22-NOV-02|||To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area.|Maroon, variably ferruginous, lithic to sublithic, fine- to coarse-grained sandstone; possible rare chertified digitate stromatolites; local basal chert clast conglomerate or breccia.|siliciclastic sedimentary rock|||N||17-JAN-23
Bowthorn Member|80377|Bowthorn Siltstone Member|2444|||Yes|Member, phase|Formal|Variation of published name|Defined|Constance Sandstone|24864|||Ectasian|1316||inferred||Calymmian|1577||inferred||100|400|QLD|Yes|69591||||Munson, T. (NTGS)|01-JUN-23|Originally the Bowthorn Siltstone Member of Slater and Mond (1980), Sweet et al. (1981). It was abandoned as a Member of the Constance Sandstone, and absorbed into the Schultz Sandstone Member, by Rawlings et al. (2008). Resurrected and modified in this study as Bowthorn Member (Sweet, 2017) to apply to the upper part of the Constance Sandstone.|Coarsening-up sequences of green laminated shale, interbedded siltstone and very fine sandstone, to fine sandstone with scattered glauconite.|siliciclastic sedimentary rock|||N||03-OCT-23
Boxer Member|84104|Tobacco Member|37740|||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Statherian|||||Statherian|1649|19|||300|500|NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|Reason for name change unclear.|White to red/brown/maroon, silicified, fine- to very coarse-grained quartzose to lithic sandstone, with local pebble trails and poorly sorted pebble-cobble conglomerate. Interlayered with micaceous siltstone and fine - medium-grained qtz to sublithic sst.||||N||04-OCT-23
Bradshaw Complex|2472|Bradshaw Granite|2473|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Orosirian|1845|12|isotopic, U/Pb|intrusion|Orosirian|1867|12|isotopic, U/Pb||||NT|No|41406|44112|||||Formerly included in the "Grindall Metamorphics" and "Bikerton Volcanics". Previously mapped as 'Bradshaw Granite' by Dunnet (1965). Redefined by Plum and Roberts (1992) as a result of rationalisation of component units.  Intruded by Giddy Suite.|Garnetiferous granite, cordierite-bearing granite, garnet-biotite-muscovite migmatite, amphibolite facies gneiss, metapelites, calcsilicates, psammites, mafic enclaves|acid intrusive rock|high grade metamorphic rock||N||17-JAN-23
Brady Gneiss|2476|||||Yes|Formation, beds|Formal|Other new published name|Described|Harts Range Metamorphic Complex|36822|||Cambrian|||||Cambrian|499|6|isotopic, U/Pb-Pb/Pb ion probe|||||No|44964||||||Geological Province: Arunta Block (Division 2).  Of the Harts Range Group. Biotite gneiss, calc-silicate rock, schistose garnet-muscovite-biotite gneiss, muscovite-biotite gneiss. Previously considered Statherian, but Harts Range Group/Harts Range Metamorphic Complex now considered Early Cambrian|Schistose leucocratic garnet-muscovite-biotite gneiss; calc-silicate rock|foliated metamorphic rock|metasomatic rock||N||17-JAN-23
Breaden Formation|79781|Mount Breaden Formation|79222|||Yes|Formation, beds|Reserved|Variation of reserved name|Defined|Winnall Group|79223|||Ediacaran|||inferred, overlying unit|deposition|Neoproterozoic|640||inferred, underlying unit||70|100|NT|Yes|72369||Donnellan, N., Normington, V. (NTGS)|28-FEB-17|Reno, B., Normington, V.|08-MAR-17|Map Sheet: HENBURY SG53-1, 5548. Nearest Town: Stuarts Well. Silicified and silcretised red and purple siltstones, thinly bedded and laminated. This will be part of the Winnall Group (to be elevated from Winnall beds). To be published: Donnellan N and Normington VJ, 2017. Towards a stratigraphy for the Neoproterozoic and probable early Cambrian in the central Amadeus Basin, Northern Territory: in Annual Geoscience Exploration Seminar (AGES) Proceedings, Alice Springs, Northern Territory 28-29 March 2017. Northern Territory Geological Survey, Darwin., also 2nd Edition Henbury 250K geology map and associated explanatory notes, release 2018.|Siltstone: thinly- + planar-bedded, or ripple cross-stratified. Chocolate-brown / dark red-brown but weathers orange, pinkish or white/pale cream. Locally chertifed to form finely banded 'ribbon-like' chert. Typically capped with ferricrete or silcrete.|fine grained siliciclastic rock|||N||17-JAN-23
Breakfast Sandstone|37732|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Benmara Group|42492|||Statherian|1725||inferred, overlying unit|deposition|Statherian|1756|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|24442|65337|Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area.|White to pink, medium- to coarse-grained silicified sublithic sandstone; thin basal pebble or cobble conglomerate; rare chertified stromatolitic carbonate.|siliciclastic sedimentary rock|||N||17-JAN-23
Brewer Conglomerate|2526|Brewer Formation|2527|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Pertnjara Group|15099|||Carboniferous|354|||deposition|Upper Devonian|365|||||1780||No|44342||||||Age: 354-365 Ma. given in 2003, but said to be Late Devonian. Source rocks include high-U granitic orthogneiss of Iwupataka Metamorphic Complex and Teapot Granite Complex.|Polymictic conglomerate with sedimentary clasts, sandstone lenses.|siliciclastic sedimentary rock|||N||17-JAN-23
Briggs Member|78970|||||Yes|Member, phase|Formal|Resvd name published|Defined|Oolloo Dolostone|24443|||Middle Cambrian|||inferred, overlying unit|deposition|Middle Cambrian|||inferred, underlying unit||133.8|160.9|NT|Yes|70380||Tickell, S.J. (NTGS)|03-OCT-14|Munson, T., Normington, V.|03-OCT-14|Middle Cambrian age is considered most likely. PROPOSED PUBLICATION: Tickell SJ, Kruse PD and Munson TJ. In prep.  Revision of the Cambrian-Ordovician succession of the Daly Basin, Northern Territory. Australian Journal of Earth Sciences.|Fine to medium, crystalline pink-grey dolostone, ooid dolograinstone, stromatolitic doloboundstone, microbial dololaminite, fine-grained quartz dolostone and dolomitic quartz sandstone; minor flat-pebble breccia, qtz sandstone, silty & shaly dolostone.|carbonate sedimentary rock|||N||17-JAN-23
Brinkley Bluff Gneiss|21329|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|||Paleoproterozoic|1605|6|||Paleoproterozoic|1605|6|||||NT|Yes|43225|43503|Shaw R.D.|22-MAY-91|||Defn card with State Convener (advised 2-Oct-91). Arunta Block.|Augen gneiss; minor leucogranite|foliated metamorphic rock|||Y||17-JAN-23
Brown Gannet Limestone|25814|Woodbine Beds|20478|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Bathurst Island Group|1249|||Santonian||||deposition|Coniacian|||||||WA|No|41532|42442|||||Reserved as Gannet Formation - advised by R.Hocking 10-12-92.|Limestone.|carbonate sedimentary rock|||N||17-JAN-23
Browns Range Granite|79304|Browns Range Dome Granite|30720|||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||Grimwade Suite|40137|||||intrusion|||||||||No|69426||||||Vandenberg and Crispe (in prep). Not formally defined. [The name is probably invalid, as Browns Range Metamorphics has priority, or does this name replace the Metamorphics?].|Porphyritic granite.|acid intrusive rock|||Y||17-JAN-23
Browns Range Metamorphics|30280|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Siderian|2504|4|||Neoarchean|2507|22||||1000|WA|Yes|43301|23621|Blake D.|26-MAR-96|Hocking, R.|22-APR-99|East Kimberley, Gordon Downs 1:250 000 sheet area. Different ages appear to represent different events.|Arkose metamorphosed to quartzofeldspathic granofels with sparse to abundant pebbles and cobbles; minor banded ironstone, siltstone, and foliated conglomeratic calc-silicate rocks.|metasedimentary siliciclastic rock|||N||17-JAN-23
Brumbreu Formation|21342|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1810||inferred|deposition|Orosirian|1840|8|inferred, underlying unit|||900|NT|Yes|24172|24172|Donnellan N.|25-MAR-91|Kruse, P.D.|31-DEC-95|Tennant Creek 1:250 000 sheet? Previously of Flynn Subgroup.|Lithic and volcanilithic sandstone; magnetite-bearing quartz sandstone; granule and pebble beds; felsic tuff (chert); sandstone is fine- to coarse-grained and thinly to medium bedded.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Brumby Formation|38038|||||Yes|Formation, beds|Formal|Resvd name published|Defined|McNamara Group|11575|||Statherian|1653||||Statherian|1725|3|||||NT|Yes|62659||Sweet, I.|10-MAR-03|Kruse, P.D.|11-APR-05|Not related to Triassic Brumby Sandstone Member (QLD). Not related to Permian Brumby Formation (TAS).  Contact between Brumby Formation and overlying Shady Bore Quartzite is sharp but probably conformable; it is not exposed.|Interbedded fine- to medium-grained, rarer coarse to granule sandstone; laminated, brecciated and stromatolitic chert; chert-clast breccia and conglomerate with sandstone matrix; siltstone and shale dominate upper part.|siliciclastic sedimentary rock|||N||17-JAN-23
Bruna Granitic Gneiss|76872|Bruna Gneiss|27349|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Statherian|1745|6|isotopic, U/Pb-Pb/Pb ICP-MS||Statherian|1747|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|64337||||||See also variations Bruna Gneiss, Bruna Granite and Bruna Granite Gneiss.|A flat-lying, sheet-like body of highly-deformed megacrystic granite up to 400m thick; typically mylonitic. Has mid to upper amphibolite facies, high-strain zones up to 100m thick at the upper and lower surfaces.|metamorphosed acid igneous rock|||Y||17-JAN-23
Brunette Limestone|2718|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Middle Miocene||||deposition|Middle Miocene|11.5|||||18||No|44965|44301|||||See also Lexicon. SE53-16,11. Age: <11.5Ma. Geological region: Barkly Tableland. Overlies Carpentaria Basin and Georgina Basin sediments.  Lithologically identical with Austral Downs Limestone; distinguished geographically: this unit is within drainage areas centred on lakes in south-central BRUNETTE DOWNS.|Fossiliferous nodular white limestone, silicified in part and containing chert nodules and bands, minor quartz sandstone and conglomerate. Characteristic features include rhizoliths, Cambrian pebbles, alveolar texture, circum- and intragranular cracks.|carbonate sedimentary rock|||N||17-JAN-23
Buchanan Hills beds|24775|Merrina beds|11727|||Yes|Formation, beds|Informal|Unknown or process pending|Defined|||||Neogene|||inferred|deposition|Cretaceous|||inferred||||NT|No|45148|45148|||||See also definition for Buchanan Hills Beds. Overlies Wiso Basin sediments.|Fine to coarse grained, angular to rounded, poorly sorted quartz sandstone; minor sandy siltstone and conglomerate: probably fluvial|siliciclastic sedimentary rock|||N||17-JAN-23
Bucket Spring Member|2782|Bucket Spring member|2783|||Yes|Member, phase|Formal|Variation of published name|Defined|Ranford Formation|15830|||Cryogenian||||deposition|Cryogenian|||||||NT|No|32699|48938|||||Of Ranford Formation, Duerdin Group.|Interbedded siltstone and fine-grained micaceous sandstone. Abundant ripple forms occur at the top of the unit.|siliciclastic sedimentary rock|||N||17-JAN-23
Buckingham Bay Sandstone|2790|Buckingham Bay Formation|29650|||Yes|Formation, beds|Formal|Variation of published name|Defined|Wessel Group|27928|||Ediacaran||||deposition|Ediacaran||||||350|NT|No|44338|43010||||||White to red, fine to coarse grained sandstone, mostly medium to thick bedded, commonly cross bedded, rare mudstone interbeds; common basal breccia or conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Buddawadda Basalt Member|2809|||||Yes|Member, phase|Formal|Other new published name|Defined|Peters Creek Volcanics|15114|||Statherian|1726|2|inferred, overlying unit|eruption|Statherian||||||600|QLD|Yes|35640|49001|Sweet I.|21-APR-78||21-APR-78|Defn card held [CEB Jul 2002]. Age from ovelying felsic parts of Peters Creek Volcanics.|Basalt, rhyolite, rhyodacite; some intermediate volcanics, possibly trachyte and andesite; minor tuff, shale, sandstone, siltstone, dolomite and conglomerate|basic volcanic rock|acid volcanic rock||N||17-JAN-23
Buddycurrawa Volcanics|37731|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Benmara Group|42492|||Calymmian|1580||inferred, geochemical correlation|eruption|Statherian|1725||inferred, geological correlation|||300|NT|Yes|24442|65337|Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area.|Interval of ferruginous sandstone (basal unit), overlain by a mixed sequence of coherent trachyte, debris flow sandstone and conglomerate, mature sandstone, ferruginous siltstone/fine sandstone and minor but distinctive stromatolitic chert horizon(s).||||N||17-JAN-23
Buffallo Fly Hill Granodiorite|23433|Buffallo Fly Hill granodiorite|2824|||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||intrusion|||||||||No|39889||R.Hammond|19-MAY-83|||Not a proper geographic name according to Brakel July84. M 85/24777|Granite.|acid intrusive rock|||Y||17-JAN-23
Buger Creek Granite|21352|||||Yes|Formation, beds|Formal|Resvd name published|Fully described|||||||||intrusion|||||||||No|43631||Blake D.|18-MAY-92|||Mount Doreen 1:250 000 sheet. Age: approx. 1780.|Granite.|acid intrusive rock|||Y||17-JAN-23
Bukalara Sandstone|2840|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Kiana Group|69563|||Ediacaran|||inferred, geological correlation|deposition|Ediacaran|1170|15|inferred, geological correlation|deposition||100|NT|Yes|44306|42639|Kruse P.D., after Dunn, 1963||Kruse, P.D.|10-APR-90|Defn on Tech File E/53-8. Redefined 1990. New definition from Tim Munson expected in late 2023 to include former Jamison sandstone within this unit.|Fine to very coarse grained, cross bedded, friable quartz to lithic sandstone with minor shale beds and basal pebbly sandstone to conglomerate; trace fossils|siliciclastic sedimentary rock|||N||01-SEP-23
Bukalorkmi Sandstone|2843|Bukalorkmi Sandstone Member|2842|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Maiwok Subgroup|25195|||Ectasian|1324|4|inferred, intrusive relationship|deposition|Ectasian|1361|21|inferred, underlying unit||5|40|NT|No|41268|23937|||||Hosts the Roper Field kimberlitic dykes.|White, light grey to brown, thinly to medium bedded, fine- to coarse-grained and locally granule-rich quartz sandstone with lesser fine-grained micaceous sandstone. Numerous sedimentary structures listed.|siliciclastic sedimentary rock|||N||08-SEP-23
Bukudal Granite|21356|Caledon Granite|27357|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Giddy Suite|30863|Orosirian|1835|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1837|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71606|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Comm. Territories SNSC|01-JAN-97|Previously included in the Myaoola and Caledon Granites.  Intrudes the Bradshaw Complex. To become part of (reserved) Wanyanmera Suite.|Massive, medium to coarse grained, equigranular, granophyric, fayalite-bearing granite; miarolitic cavities and mafic clots.|acid intrusive rock|||Y||17-JAN-23
Bullion Schist|29219|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian|1805||||Orosirian|1819||||||NT|Yes|42643|42643|P.Haines, L.Bagas|17-DEC-87|Kruse, P.D.|10-APR-90|Originally reserved as Bullion Formation. Defined by L.Bagas.  Intruded by Bean Tree and Ooralingie Granites, and the Barrow Creek Granitic Complex. Hosts Sn-Ta mineralisation at the Barrow Creek pegmatite field.|Metamorphosed pelite, feldspathic/lithic and quartz arenite, quartz mica schist with andalusite, porphyritic felsic volcanics and amphibolite|metasedimentary siliciclastic rock|||N||17-JAN-23
Bullita Group|2914|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Calymmian|1570|||deposition|Statherian|1610||||||NT|No|32699|48943|||||Age: 1610-1570Ma. Birindudu Basin.|Dolostone, dolarenite, siltstone, sandstone, chert, shale.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Bullo River Sandstone|26436|||||Yes|Formation, beds|Formal|Other new published name|Defined|Duerdin Group|5760|||Cryogenian||||deposition|Cryogenian||||||320|NT|No|32699|48938||||||Quartz sandstone, conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Bullrush Conglomerate|38039|||||Yes|Formation, beds|Formal|Resvd name published|Defined|McNamara Group|11575|||Statherian||||deposition|Statherian|1646|5|inferred|||500|NT|Yes|62659||Sweet, I.|10-MAR-03|Kruse, P.D.|11-APR-05|Located on map sheet SE53-12. Overlain by Plain Creek Formation, probably conformably.|Polymict granule, pebble and cobble conglomerates, cross-bedded sandstone; stromatolitic chert and chert-clast conglomerate, fine-grained lithic sandstone and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Bunghara Metamorphics|23442|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Narwietooma Metamorphic Complex|29528|Narwietooma Suite|33045|Orosirian|1880|5|isotopic, Sm/Nd||Orosirian|1880|5|isotopic, Sm/Nd||||NT|Yes|49831|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|01-JUL-91|||Defn Card with State Convenor, Oct 91. BD RC/022 p15. Previously Mount Zeil granulite, Adla Granulite [in part] etc. The westernmost outcrops previously assigned to this unit, in the Hermannsburg 1:250 000 sheet, are now [2005] included in the Yaya Metamorphic Complex (Scrimgeour et al., 2005).|Migmatitic banded biotite gneiss; minor quartzofeldspathic gneiss, sillimanite gneiss, rare calc-silicate rock|high grade metamorphic rock|||N||17-JAN-23
Bungitina metamorphics|3012|Bungitina Granodiorite|3011|||Yes|Formation, beds|Informal|Variation of published name|Fully described|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic|1770|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992||Shaw R.D.||Branch, C.T.|01-JUL-79|1979 definition card. Fully described. Includes Joklik's (1955) Bungitina Granodiorite and granitised Irindina Gneiss. Has this name been formalised? PP 08/06.|Quartzofeldspathic gneiss, mafic gneiss, biotite gneiss; some amphibolite, hornblende or clinopyroxene bearing quartz-plagioclase rock, garnet-biotite gneiss, porphyroblastic feldspar gneiss|foliated metamorphic rock|||U||17-JAN-23
Bungle Bungle Dolomite|24791|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Mesoproterozoic||||deposition|Paleoproterozoic||||||300|WA|No|44317|45140|||||Defn on Tech File SE/52-6. Probably conformable on Mount Parker Sandstone. Limited to Osmond Range area.  No longer includes Halls Creek area dolomite (now the Neoproterozoic Eliot Range Dolomite). See also recent use of Bungle Bungle Formation.|Dolarenite, dololutite, and dolorudite, and chert breccia; commonly stromatolitic; minor dolomitic sandstone, siltstone and mudstone, and stromatolitic chert.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Bunkers Granodiorite|42077|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Inningarra Suite|41160|Paleoproterozoic||||magmatic crystallisation|Paleoproterozoic|1815|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|23809||||||In the region of Bunkers Hill, NT, but|medium to coarse granodiorite with noticeably deformed feldspars and quartz.|acid intrusive rock|||Y||17-JAN-23
Burangoo Formation|84105|Burangoo Sandstone|77877|||Yes|Formation, beds|Formal|Variation of published name|Defined|Wild Cow Subgroup|37739|||Calymmian||||||1615||||50|320|QLD|Yes|||||Munson, T. (NTGS)|01-JUN-23||Fine- to coarse-grained, lithic, sublithic and quartzose sandstone, with scattered grains and layers of quartz granules and pebbles; strongly trough cross-bedded in many outcrops; also planar cross-beds, planar bedding and hummocky cross-stratification.||||N||04-OCT-23
Burangoo Sandstone|77877|Burangoo Sandstone Member|37736|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Wild Cow Subgroup|37739|||Ectasian||||deposition|Calymmian|1602|30|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|50|320|QLD|No|67539||||||Is to replace B.S.Member (37736). See also Geology of Queensland 2013, p52, 54. Of Wild Cow Subgroup, South Nicholson Group. Maximum depositional age given. May extend into NT?|White to pale yellow, silicified to friable, fine- to coarse-grained, quartzose to sublithic sandstone with minor scattered granules and rare small pebbles of quartz.|siliciclastic sedimentary rock|||N||14-APR-23
Burash Sandstone|33171|Masterton Formation|11440|||Yes|Formation, beds|Formal|Resvd name published|Defined|Tawallah Group|17902|||Statherian|1670|||deposition|Statherian|1708|5|inferred, underlying unit|||370|NT|Yes|22538|22538|Rawlings D.|17-NOV-98|||Part of Rawling's 'Goyder package'. Previously included in Masterton Sandstone. Equivalent to the upper part of 'Masterton Formation' mapped on Tanumbirini sheet (Paine, 1963).|Quartzic sandstone, with minor coarse or granule intervals near top.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Burnside Granite|26441|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||Burnside Suite|31738|Statherian|1750|||intrusion|Statherian|1800|5|isotopic, U/Pb||||NT|No|46676||||||Pine Creek Province. Intrudes South Alligator and Finniss River Groups. NOT related to Mesoproterozoic Burnside Granite (WA).|Pink to grey, fine- to medium-grained, porphyritic to equigranular biotite granite, moderately foliated.|acid intrusive rock|||Y|I-type|17-JAN-23
Burnside Suite|31738|Burnside suite|31712|||Yes|Group, Suite|Formal|STRATLEX Entry|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic|||||||NT|No|50586||||||Geochemical suite nomenclature, using Burnside Granite as the type.  Comprising the Burnside and Wandie Granites, and the Frances Creek and Douglas Leucogranites.|Leucogranite-dominated plutons;|acid intrusive rock|||Y||17-JAN-23
Burrell Creek Formation|3134|Noltenius Formation|14211|||Yes|Formation, beds|Formal|Other new published name|Defined|Finniss River Group|6669|||Orosirian|1862|6|inferred, intrusive relationship|deposition|Orosirian|1868|4|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||4000|NT|No|22574|44314|||||See also Lexicon. Maximum depositional age (RefID 69383 (2010)), from detrital zircons: 1851 +/- 9 Ma from sample near top of Formation. Intruded by Allia Suite, Two Sisters Granite (age 1862+/-6 Ma). 3000m thick. Hosts several gold deposits; also the Anomaly A (Cu-Pb-Zn), Daly River (Cu) and Mount Diamond (Cu-Bi-Au) deposits. Also hosts pegmatite Sn-Ta-Nb deposits and vein Sn deposits.|Fine to coarse feldspathic metagreywacke; minor phyllite, slate, mudstone, lenses of volcanilithic pebble conglomerate, quartz-mica schist.|metasedimentary siliciclastic rock|||N||17-JAN-23
Burt Bluff Gneiss|27284|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|||Paleoproterozoic|1603|7|isotopic, U/Pb-Pb/Pb ion probe||Paleoproterozoic|1603|7|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60547|48992|L.Offe|05-MAR-75|Brown, M.C.|31-OCT-78|Arunta Block.|Biotite-quartz-feldspar orthogneiss, subordinate laminated granitic gneiss.|foliated metamorphic rock|||N||17-JAN-23
Burt Range Formation|3168|Burt Range Limestone|3171|||Yes|Formation, beds|Formal|Other new published name|Defined|Langfield Group|10161|||Tournaisian||||deposition|Tournaisian||||||460||No|48635|45038|||||Formerly Burt Range Series. Now includes Spirit Hill Limestone. Hosts Pb-Zn-Ag deposits.|Calcareous sandstone, quartzose limestone and dolostone, minor carbonaceous shale. A diverse fossil assemblage.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Burt-Rungutjirba Suite|81761|Burt-Rungutjirba granite suite|69471|||Yes|Group, Suite|Informal|Variation of published name|Briefly described||||||||||Statherian|1615|11|isotopic, U/Pb-Pb/Pb ion probe|||||No|69931||||||Possible formalising of units 69471 and 79340. Arunta Block. Intrudes the Iwaupataka Package.|||||Y||09-AUG-23
Burtawurta Formation|3176|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Calymmian||||||53|NT|No|28255|48943|||||Source of age information not clear. Said to be Mesoproterozoic, but conformably underlying unit, Wickham Formation may be Statherian (Paleoprot). Birrindudu Basin.|Siltstone and sandstone mainly. Micaceous siltstone interbedded with light grey, very fine quartz sandstone dolomitic siltstone and dolostone.|fine grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Burvill Formation|3187|Burvill beds|24800|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Weaber Group|19643|||Visean||||deposition|Visean||||||85||No|41839||||||Formally known as Burvill beds. Max. thickness: <80m.|Sandstone, typically fine- to very fine-grained; minor siltstone, shale, calcareous sandstone and quartzose limestone. A diverse assemblage of macrofossils, trace and microfossils.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Bustard Subgroup|21402|||||Yes|Subgroup|Formal|Resvd name published|Defined|Groote Eylandt Group|33979|Bickerton Suite|31751|Statherian|1790||inferred, geological correlation|deposition|Orosirian|1820||inferred, geological correlation|||1000|NT|Yes|71606|22808|Haines P.W., Rawlings D.J., Pietsch B.A.|01-MAR-95|||Age inferred from constituent Bickerton Rhyolite (1814+/-8 Ma), towards the top of the Group..|Lithic and quartzose sandstone, conglomerate; rhyolitic volcanics|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Bynoe Formation|3225|Coolibah Formation""|4542|||Yes|Formation, beds|Formal|Other new published name|Defined|Bullita Group|2914|||Calymmian||||deposition|Calymmian||||||243|NT|No|28255|48942|||||May be unconformable, locally on Bardia Chert Member [??]. Age reasons not clear. Birindudu Basin.|Siltstone, dolomitic siltstone and sandstone, quartz sandstone;  minor dolostone, chert, granular and pebbly sandstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Cabbage Gum Granite|3256|Cabbage Gum Granite Complex|3255|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Tennant Creek Supersuite|39127|Orosirian|1846|8||intrusion|Orosirian|1848|7|isotopic, U/Pb-Pb/Pb ion probe|||||No|29135|60684|||||Tennant Creek / Davenport Province.|Biotite-bearing granite; seriate porphyritic to equigranular; rapakivi texture; minor metasediment xenoliths; foliated, sheared in part, and locally gneissic.|acid intrusive rock|||Y|I-type|17-JAN-23
Cackleberry Metacarbonates|83054|Cackleberry Metamorphics|23452|||Yes|Member, phase|Formal|Variation of published name|Defined|Deep Bore Metamorphics|23539|||Statherian|1790||inferred, geological correlation||Orosirian|1820||inferred, geological correlation||||NT|Yes|73128||||Munson, T. (NTGS)|25-AUG-22|Bit unclear in RefID 73128 whether this unit is intended as a subset of the Cackleberry Metamorphics (which would be an invalid use of the name), or a major revision of the old unit to now only include the metacarbonates. Written as: Re-interpretation by Reno et al (in prep) of the metacarbonate portion of the 'Cackleberry Metamorphics' of Scrimgeour and Raith (2001).|Calc-silicate rocks.||||N||17-JAN-23
Cadna-owie Formation|3284|Transition Beds""|18534|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Aptian|||inferred|deposition|Berriasian|||inferred, geological correlation||10|100|SA|No|44658|69946|||||Defined Wopfner, Freytag and Heath 1970. See also Marree Formation. Formerly part of Rolling Downs Group, NSW; Blythsdale Group, Qld & Neales River Group, SA. Age - Neocomian-Aptian  (see Strzelecki 1:250k explan notes (1995) for details). Currently (2013) ungrouped. The name Rolling Downs Group is applied to the succession from top Cadna-owie Formation to top Winton Formation. See 'Geology and Mineral Resources of the Northern Territory (2013), p41:6. Main aquifer of the Great Artesian Basin.|Transitional, non-marine to marine pale grey sandstone, siltstone, calcareous sandstone and pebbly sandstone, some feldspathic;intraformational conglomerate; thin coaly layers, dark mudstone, layers of kaolin-like material, possibly altered tuff.|siliciclastic sedimentary rock||intracratonic|N||17-JAN-23
Cadney Metamorphics|26447|Cadney metamorphics|27730|||Yes|Formation, beds|Formal|Variation of published name|Described|Strangways Metamorphic Complex|17395|||Paleoproterozoic|1760||||Paleoproterozoic|1780|||||||No|39888||||||See Cadney metamorphics for definition (defined as an informal unit). Not to be confused with Cadney Park nomenclature in South Australia.|Calc-silicate rock, marble, sillimanite and biotite gneiss; minor quartzofeldspathic gneiss, felsic granulite, mafic granulite, garnet-biotite gneiss, quartzite, amphibolite|high grade metamorphic rock|||N||17-JAN-23
Cahill Formation|24806|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian|||inferred, intrusive relationship|deposition|Paleoproterozoic|2500|8|isotopic, U/Pb-Pb/Pb ion probe|||3500|NT|Yes|46824||Needham, R.S.|29-MAR-76|Wells, A.T.|29-APR-76|Myra Falls Metamorphic may be a high-grade equivalent of Cahill Formation. See also variation Cahill Schist. Previously included in Namoona Group, Woodcutters Supergroup. May now be included in Cosmo Supergroup? Hosts gold deposits|Interbedded and well foliated, medium-grained mica-feldspar-quartz schist, feldspathic quartzite, meta-arkose, feldspar-quartz schist, mica schist, garnet-mica schist and quartzite; minor conglomerate; commonly magnetitic, locally chloritised|foliated metamorphic rock|metasedimentary siliciclastic rock||N||17-JAN-23
Cahill Formation - high grade metasediments|72380|||||Yes|Member, phase|Informal|Variation of published name|Described|Cahill Formation|24806|||Orosirian|2050||||Siderian|2500|||||||No|||||||Lithology referring to an informal unnamed unit of the Cahill Formation to be used for Northern Territory 1:1 million geological map, National Maps Project.|Calc-silicate gneiss, metapsammite, metapelite; higher metamorphic grade part of Cahill Formation|foliated metamorphic rock|||N||17-JAN-23
Cahill Formation - quartzite|72399|||||Yes|Member, phase|Informal|Variation of published name|Described|Cahill Formation|24806|||Orosirian|2050||||Siderian|2500|||||||No|||||||Lithology referring to an informal unnamed unit of the Cahill Formation to be used for Northern Territory 1:1 million geological map, National Maps Project.|Quartzite|metasedimentary siliciclastic rock|||N||17-JAN-23
Calamity gneiss|69472|Calamity gneissic unit|29762|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|1540||||Mesoproterozoic|1600|||||||No|61154|||||||Homogeneous gneissic granite and tonalite - fine to medium to coarse-grained; typically has granoblastic texture with gneissic foliation. Four distinct lithotypes; tonalitic biotite gneiss, granitic gneiss, red granite, clinopyroxene-hornblende gneiss.|metamorphosed acid igneous rock|acid intrusive rock||N||17-JAN-23
Callie Member|40762|||||Yes|Member, phase|Formal|Resvd name published|Fully described|Dead Bullock Formation|35396|||Orosirian||||deposition|Orosirian|||||600|1000||No|62628||Crispe, A.|08-APR-04|||Crystallisation age from a tuff within the Callie Member (Cross and Crispe 2007). Within the Tanami Group. Detailed stratigraphy for this unit at Dead Bullock Soak is published by Smith et al (1998) and Lambeck (2004) - see page 10 RefID: 63261. Contains the Callie mineralisation deposit hosted by the "Callie host unit". Top boundary redefined in Bagas et al. (2014). Hosts sedimentary gold.|Grey siltstone, chert, silty shale, fine-grained sandstone, laminated siltstone, quartzite, black carbonaceous shale, nodular chert, amphibolite, ironstone interlayered with chert.|siliciclastic sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Cambrian rocks 79421|79421|||||Yes|Formation, beds|Unnamed|Unnamed published|Unpublished|||||Cambrian|||||Cambrian||||||||No|||||||Cambrian, undivided.|||||N||17-JAN-23
Cambrian sedimentary rocks 76536|76536|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Late Cambrian|490|||deposition|Early Cambrian|545|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset, and 'Pre-Cz geology, NSW & Vic'.|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Cambrian to Ordovician sedimentary rocks 76530|76530|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Ordovician|434|||deposition|Early Cambrian|545|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Camfield beds|25829|Camfield Beds|3399|||Yes|Formation, beds|Informal|Variation of published name|Defined|||||Late Miocene||||deposition|Middle Miocene|||||||NT|No|45148|45148||||||Conglomeratic limestone, chalcedonic limestone, calcareous sandstone, siltstone, basal conglomerate.|carbonate sedimentary rock|||N||17-JAN-23
Camooweal Dolostone|68909|Camooweal Dolomite|3402|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Barkly Group|32954|||Mindyallan||||deposition|Boomerangian||||||167|NT|Yes|60122|64443|||Kruse, P.D.|07-JUN-05|Revised definition (PD Kruse, after Öpik (1954, 1956a), 07-JUN-2005). Replaces Camooweal Dolomite. Age: Middle Cambrian: latest Floran or early Boomerangian to notionally early Mindyallan. See also BMR Cattle Creek-1.|Dolostone, dolomitic limestone, planar microbial dololaminite with nodular chert; minor marl; basalt intraclast and ooid dolograinstone, oncoid dolofloatstone, quartzic dolostone and quartz sandstone.|carbonate sedimentary rock|||N||17-JUL-23
Camooweal-Murphy Domain - moderately magnetic rocks 79891|79891|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Camooweal-Murphy Domain - strongly magnetic rocks 79908|79908|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Campbell Springs Dolostone|33807|Campbell Springs Dolomite|28279|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Limbunya Group|10414|||Statherian|1638|9|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1639|7|isotopic, U/Pb|deposition||50|NT|No|60682||Kruse P. , Beier P., Young D.|02-DEC-99|||Supersedes Campbell Springs Dolomite (unit no. 28279). Birrindudu - Victoria River Basins.  Age of volcaniclastic unit within dolostone: 1639 +/- 7Ma [Check Ref ID 23809 Smith, 2001 for more info on what was dated & how] . Overlain by the former Bardia Chert Member, now remapped as Tertiary silcrete/duricrust.|Dolostone, stromatolitic in part; chert, dolomitic siltstone, dolarenite, dolorudite; minor water-laid tuffite.|carbonate sedimentary rock|acid volcanic rock||N||17-JAN-23
Canefire Granite|80604|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Alkara Suite|81826|Statherian|1735|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|||||||NT|Yes|||Reno, B. (NTGS)|10-AUG-18|Munson, T. (NTGS)|25-AUG-22|To be published: Dneiper 1:100k explanatory notes in 2020. Sheet 5952, 1:250k sheet Huckitta SF53-11. See also Canefire granite. Sample gave 1776 +/- 13 Ma max emplacement age. May be inheritance from Kanandra Metamorphics.|Medium-grained biotite granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Canulgerra Sandstone|24210|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Hanlon Subgroup|24304|||Statherian||||deposition|Statherian|||||||NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project. Definition by Wyche S. 07-OCT-1981. Within the Hatches Creek Group.|Quartz sandstone, siltstone and shale; minor feldspathic lithic sandstone; pebbly sandstone locally, and rare polymictic conglomerate. Siltstone flakes common in sandstone.|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Cape Londonderry Formation|3509|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Troughton Group|18608|||Norian||||deposition|Anisian||||||||No|41532||A.J.Mory|17-JUL-87||||Sandstone; minor siltstone and shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Cappocks Granodiorite|80337|Mascotte Gneiss|11430|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Casper Suite|80344|Statherian|1760||isotopic, U/Pb-Pb/Pb ICP-MS|deformation|Statherian|1772.6|3.4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71621|72516|Beyer, E. (NTGS)|29-NOV-17|Munson, T.|15-NOV-18|Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin.|Biotite - hornblende granodiorite to diorite, rare monzogranite: medium- to coarse-grained, equigranular; moderately foliated to locally gneissic.|acid intrusive rock|metamorphosed acid igneous rock||Y|I-type|17-JAN-23
Captain Morgan Metadolerite|81824|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||Black Label Suite|81822||||||||||||||No|||Reno, B. (NTGS)|31-JAN-20|||To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Nearest town is Alateye. Named for the Captain Morgan Bore.|Metadolerite: fine- to medium-grained, aphyric to porphyritic to glomerophyric with primary igneous assemblages and textures locally preserved; fresh to moderately weathered; undeformed to foliated to locally gneissic.|basic intrusive rock|||Y||17-JAN-23
Caramal Amphibolite|76181|Zamu Dolerite|27310|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic|||inferred, intrusive relationship||Orosirian|||inferred, intrusive relationship||||NT|Yes|67779|67779|Glass, L.M., Hollis, J.A. (NTGS)|03-OCT-11|Beyer, E., Normington, V.|09-SEP-14|Replaces Zamu Dolerite (of Ferguson and Needham 1978) in part. Occurs within Cahill Formation, Nourlangie Schist  and Kukalak Gneiss.  In Caramal and Myra Falls Inliers, Nimbuwah Domain, Pine Creek Orogen.|Mainly granoblastic hornblende and plagioclase amphibolite; weakly to strongly foliated, locally garnetiferous; hornblende-bearing leucosomes that are cross-cut and deformed in the foliation.|high grade metamorphic rock|||Y||17-JAN-23
Caranbirini Member|23467|||||Yes|Member, phase|Formal|Resvd name published|Fully described|Lynott Formation|10891|||Statherian||||deposition|Statherian||||||200||No|39791||K.A.Plumb|28-APR-83||||Thinly bedded laminated dolomitic siltstone and shale, in part carbonaceous and pyritic; silty dololutite, dololutite; minor fine-grained dolarenite and lenses of slump breccia; uncommon ripples and evaporite mineral casts.|carbonate sedimentary rock|||N||17-JAN-23
Carl Creek Limestone|3620|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Miocene||||deposition|Miocene|21.5|||||||No|44281|44274|||||Defined 1960, 1968. See also Lexicon. Renamed Verdon Limestone by Traves and Noakes 1954, but old name was re-established. Age: <21.5Ma Together with Gregory Downs Limestone thickness is 12m.|Basal calcite-cemented breccia overlain by a thick-bedded sandy calcirudite containing gastropod and vertebrate remains.|carbonate sedimentary rock|||N||17-JAN-23
Carlo Sandstone|3624|||||Yes|Formation, beds|Formal|Other new published name|Defined|Toko Group|18263|||Sandbian|||inferred, overlying unit|deposition|Sandbian||||||190|QLD|No|44358|44309|||||Contains Middle Ordovician pelecypods.|Medium to thick beds of fine to medium quartz sandstone, and minor feldspathic sandstone and siltstone; various current features. Has a prominent basal clay-pellet bed.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Carlton Group|3629|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Lower Ordovician||||deposition|Middle Cambrian||||||1500||No|44159||||||Do not confuse with Carlton nomenclature of NSW.|Sandstone, siltstone, shale, and stromatolitic dolomite|siliciclastic sedimentary rock|carbonate sedimentary rock||N||23-FEB-23
Carmencita Metadolerite|83559|Carmencita Granulite|80196|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Statherian|||inferred, intrusive relationship||Statherian|1780||inferred, intrusive relationship|intrusion|||NT|Yes|73551||Weisheit, A, (NTGS)|03-MAY-22|Munson, T. (NTGS)|25-AUG-22||||||Y||02-JUN-23
Carmichael Sandstone|3635|||||Yes|Formation, beds|Formal|Other new published name|Defined|Larapinta Group|10184|||Upper Ordovician|444||inferred, lithostratigraphic correlation|deposition|Upper Ordovician|458||inferred, lithostratigraphic correlation|||150|NT|No|44342|45041|||||Previously combined with Stokes Siltstone in "Stokes Formation". Age assumed to be Ordovician, but some authors give range into the Devonian. Age control appears to be very poor, from limited fossils. Important aquifer. Maximum depositional age: youngest concordant zircon 497 +/- 5 Ma.|Interbedded pale brown to red-brown sandstone, siltstone and mudstone. Sandstone is fine- to medium-grained, moderately to poorly sorted. Siltstone and mudstone sometimes have mudcracks and halite pseudomorphs.|siliciclastic sedimentary rock|||N||21-SEP-23
Carmilly Formation|38418|Carmilly Creek|30249|||Yes|Formation, beds|Formal|Resvd name published|Defined|Tomkinson Creek Group|18318|||Statherian|1780|||deposition|Statherian|1780|||||750||No|60684|24303|||||Reserved as Carmilly Creek (Hussey, 1996)|Mudstone, sandstone, dolostone and chert; stromatolitic bioherms and evaporite pseudomorphs|siliciclastic sedimentary rock|||N||17-JAN-23
Carnegie Formation|3647|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Ediacaran||||deposition|Ediacaran||||||||No|48842|44439||||||Sandstone, siltstone, shale, conglomerate, diamictite, dolomite.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Carolina Sandstone Member|26462|||||Yes|Member, phase|Formal|Other new published name|Fully described|Seigal Volcanics|16726|||Statherian|||inferred|deposition|Statherian|1863|6|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||20||No|44306||||||Previously considered part of Peters Creek Volcanics. Defn on Tech File E/53-8. Within the Tawallah Group. Maximum depositional age (detrital zircons) applies to the parent Seigal Volcanics too, and is older than the maximum depositional age for the underlying Westmoreland Conglomerate (~1843 Ma).|Lithic sandstone and quartz sandstone, fine- to medium-grained, flaggy or massive; minor siltstone beds in the north and conglomerate in the southwest..|siliciclastic sedimentary rock|||N||17-JAN-23
Carr Boyd Group|3663|Carr Boyd Range Group|3665|||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Ectasian||||deposition|Ectasian|1200|||||||No|31393||||||Carr Boyd Ranges, East Kimberley? Different from Carr Boyd Rocks Complex/Carr Boyd Complex.|Sandstone, ferruginous sandstone, siltstone and mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Carrara Range Group|3679|Carrara Range Formation|3678|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Statherian|1700|||deposition|Statherian|1750||||||NT|Yes|49018|49018||||||Pink, massive to flow banded rhyolite; fine to medium grained sublithic to lithic sandstone; massive to vesicular basalt and microdolerite; medium to coarse grained locally pebbly lithic to quartzose sandstone|igneous rock|siliciclastic sedimentary rock||N||17-JAN-23
Carrington Suite|41811|Carrington Granitic Suite|31354|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Statherian|1767|||intrusion|Statherian|1779|6|isotopic, U/Pb-Pb/Pb ion probe|||||No|50369||||||Probably intended to replace Carrington Granitic Suite. See also Carrington Granite Suite. Informally subdivided in to 7 unnamed granite bodies in Lake Mackay area. Shown as equivalent age to Rapide Granite, older than 1770-1760Ma Yambah Event, younger than Reynolds Range Group, Nicker beds. Aileron Province, Arunta orogen, North Australian Craton. NTGS has a longer description than GSWA.|Weakly porphyritic to equigranular biotite metagranite. Granite gneiss interlayered with metagabbro.|metamorphosed acid igneous rock|metamorphosed basic igneous rock||Y|S-type|17-JAN-23
Carrington Suite - group 1|72640|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Carrington Granitic Suite|31354|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Porphyritic biotite granite|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - group 2|72641|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Carrington Granitic Suite|31354|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Granite, varies fine, medium to coarse grained, equigranular, commonly biotite-rich, occasional muscovite|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - group 3|72642|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Carrington Granitic Suite|31354|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Granite, dominantly leucocratic and equigranular, varies fine, medium to coarse, contains aplite and leucocratic veins, rare clots or radial tourmaline|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - group 4|72643|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Carrington Granitic Suite|31354|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Foliated porphyritic biotite granite and biotite-hornblende, may contain garnet. Rare cordierite and garnet bearing phase|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - group 5|72644|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Carrington Granitic Suite|31354|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Porphyritic biotite granite, foliated|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - highly magnetic 80658|80658|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||Carrington Suite|41811|Statherian|||inferred||Statherian|||inferred|||||No|||||||Subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area. After NT interpreted geology: Lake Mackay (-Pgc)|Some of: porphyritic to equigranular biotite granite, fine to coarse grained, leucocratic in places; lesser muscovite granite; w aplite, leucocratic veins, rare clots of radial tourmaline; biotite-hornblende granite; all foliated.|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - moderately magnetic 80660|80660|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||Carrington Suite|41811|Statherian|||inferred||Statherian|||inferred|||||No|||||||Subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area. After NT interpreted geology: Lake Mackay (-Pgc).|Some of: porphyritic to equigranular biotite granite, fine to coarse grained, leucocratic in places; lesser muscovite granite; w aplite, leucocratic veins, rare clots of radial tourmaline; biotite-hornblende granite; all foliated.|acid intrusive rock|||Y||17-JAN-23
Carrington Suite - weakly magnetic 80659|80659|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||Carrington Suite|41811|Statherian|||inferred||Statherian|||inferred|||||No|||||||Subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area. After NT interpreted geoogy: Lake Mackay (-Pgc).|Some of: Porphyritic to equigranular biotite granite, fine to coarse grained, leucocratic in places; lesser muscovite granite; w aplite, leucocratic veins, rare clots of radial tourmaline; biotite-hornblende granite; all foliated.|acid intrusive rock|||Y||17-JAN-23
Carruthers Formation|38416|Carruthers Creek Formation|38515|||Yes|Formation, beds|Formal|Variation of published name|Defined|Namerinni Group|38414|||Statherian|1639|27|inferred, overlying unit|maximum depositional age|Statherian|||inferred|maximum depositional age||1100||No|24304|24303|||||Reserved as Carruthers Creek (Hussey, 1996). Abbreviation of Carruthers Creek Formation.|Includes upper (sandstone and mudstone; stromatolitic bioherms, halite and gypsum pseduomorphs), middle (sst; lithic arenite, mudst. dolomitic mudst.,) and lower (mudst. and fine-gr.sst)) facies as well as undifferentiated sst, mudst, chert and dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Carters Bore Rhyolite|3701|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Sybella Suite|30647|Statherian|1678|2|isotopic, U/Pb-Pb/Pb ion probe|eruption|Statherian|1680|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||QLD|Yes|32660|35167|Derrick G.||Ward, W.T.|26-JAN-78|Mount Isa Province. Age updated by NABRE project. Of McArthur Group, or revised to McNamara Group? (See AJES 47[3]). Magmatic age from Page and Sweet (1998). Co-magmatic with Sybella Batholith granites, and dolerite reported herein as 1674+/-2.4 Ma.|Porphyritic rhyolite, porphyritic felsic volcanics, minor basalt|acid volcanic rock|||N||17-JAN-23
Cartier Formation|3707|Cartier Beds|3705|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Woodbine Group|20481|||Aquitanian|20.4|||deposition|Oligocene|30|||||||No|41437|||||||Comprises claystones, marls and calcisiltites.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Casey Inlier East 78213|78213|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. No lithology stated. Both Yambah and Stafford age plutons present within the polygon [which means??]. Aileron province in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006).|Unknown.||||U||17-JAN-23
Casper Suite|80344|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||Baikal Supersuite|80342|Statherian|1770||inferred|magmatic crystallisation|Statherian|1794|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71750|72516|Beyer, E. (NTGS)|29-NOV-17|Normington, V.|15-NOV-18|Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. The Casper Suite is a suite of ca. 1.79-1.77 Ga I-type calc-alkaline to low-K (tholeiitic) intrusives with compositions ranging from gabbro to tonalite to granodiorite. It consists of six named units; White Violet Orthogneiss, Attutra Metagabbro, Kings Legend Metadolerite, Jervois Granodiorite, Cappocks Granodiorite and Xanten Granodiorite plus a poorly exposed, unnamed granodiorite.|I-type calc-alkaline to low-K (tholeiitic) intrusives with compositions ranging from gabbro to tonalite to granodiorite.|basic igneous rock|intermediate igneous rock||Y|I-type|17-JAN-23
Castlereagh Hill Porphyry|3764|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Paperbark Supersuite|31788|Orosirian||||magmatic crystallisation|Orosirian|1855|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|44317||||||Part of the Whitewater Volcanics reassigned to Castlereagh Hill Porphyry. Porphyritic rock unit of Castlereagh Hill redefined as Greenvale Porphyry. In the Western Zone of the Lamboo Complex.|Quartz-feldspar porphyry, hornblende-biotite granodiorite.|igneous volcanic rock|acid intrusive rock||Y||17-JAN-23
Catfish Conglomerate|3784|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|41268|||||||||||N||17-JAN-23
Cato Volcanics|21470|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Spencer Creek Group|29406|Fagan Supersuite|31308|Statherian||||eruption|Statherian|1717|11|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||400|NT|Yes|44112|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|27-APR-94|Haines, P.|14-MAR-95|Arnhem Bay 1:250 000 sheet area. Correlated with McArthur Basin units. Geochemical parent grouping - Fagan Supersuite.|Rhyolite: pink to brown, porphyritic with phenocrysts of K-feldspar, quartz, plagioclase and pyroxene.|acid volcanic rock|||N||17-JAN-23
Caulfield Formation|84102|Caulfield beds|37728|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Calymmian|||||Statherian|1634|20||||||Yes|||||Munson, T. (NTGS)|01-JUN-23||Dominated by, lithic, micaceous, coarse- to very coarse-grained, pebble-bearing sandstone and pebble to boulder conglomerate. Interbedded minor fine- to medium-grained lithic sandstone, micaceous siltstone, dolarenite, dolorudite, dololutite.||||N||03-OCT-23
Caulfield beds|37728|Fickling beds|6632|||Yes|Formation, beds|Informal|Resvd name published|Defined|South Nicholson Group|17123|||Calymmian|||inferred|deposition|Orosirian|1634|20|isotopic, U/Pb|||600|NT|Yes|24442||Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area. Previously mapped as 'Fickling beds' .|Medium to very thick bedded, coarse grained, poorly sorted lithic sandstone and matrix supported granule to pebble conglomerate; minor intercalated carbonate, chert and siltstone|siliciclastic sedimentary rock|||N||17-JAN-23
Cavenagh Metamorphics|3844|Cavenagh metamorphics|24216|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|9199|||||||Well layered and massive quartzofeldspathic gneiss, para-amphibolite, amphibolite; rare calc-silicate rock, hematite quartzite|high grade metamorphic rock|||N||17-JAN-23
Celia Dolostone|42259|Celia Dolomite|26471|||Yes|Formation, beds|Formal|Variation of published name|Described|Manton Group|25203|||Paleoproterozoic|2026|||deposition|Paleoproterozoic|2500|||||300|NT|No|24442||||||Dolostone now preferred term. Advised by P.Kruse (Nov. 2004). Hosts widely distributed stratabound magnesite bodies.|Stromatolitic magnesite, dolostone, some silicified, rare para-amphibolite and mudstone.|carbonate sedimentary rock|||N||17-JAN-23
Cement Dam Gneiss|41993|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|||inferred, geological correlation||Paleoproterozoic|||inferred, geological correlation|||||No|9199||||||See also the informal Cement Dam gneiss.  Age inferred from regional geology.|Porphyroblastic-feldspar biotite-rich gneiss|foliated metamorphic rock|||N||17-JAN-23
Cenozoic alluvium 76543|76543|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Holocene|0|||deposition|Paleocene|65|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Surficial or regolith units; poorly consolidated alluvial, colluvial, aeolian, lacustrine and coastal deposits; residual deposits (eg, laterite).|regolith|||N||17-JAN-23
Cenozoic regolith 76541|76541|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Holocene|0|||deposition|Paleocene|65|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Surficial or regolith units; poorly consolidated alluvial, colluvial, aeolian, lacustrine and coastal deposits; residual deposits (eg, laterite).|regolith|||N||17-JAN-23
Cenozoic regolith 76542|76542|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Holocene|0|||deposition|Paleocene|65|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Surficial or regolith units; poorly consolidated alluvial, colluvial, aeolian, lacustrine and coastal deposits; residual deposits (eg, laterite).|regolith|||N||17-JAN-23
Central Mount Stuart Formation|3865|Central Mount Stuart Beds|3864|||Yes|Formation, beds|Formal|Variation of published name|Defined|Mopunga Group|12305|||Ediacaran|||biozone|deposition|Ediacaran|||biozone|||800|NT|Yes|11884|45155|||||Original definition by Offe L.A., 1978  79/19617. Age is Ediacaran (Late Adelaidean).|Lithic, arkosic and quartzitic arenite, white, purple and red-brown; siltstone, dolostone and minor basal conglomerate.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Century Domain - moderately magnetic rocks 79987|79987|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Century Formation|38832|Century Bore Formation|38760|||Yes|Formation, beds|Formal|Resvd name published|Fully described|Ware Group|38831|||Orosirian|1815|||deposition|Orosirian|1823|4|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1200||No|60681||Crispe, A.|31-JUL-03|||SF52-03. Near Tanami mine. Detrital zircons in lithic arenite from this unit give maximum depositional age: ca.1823+/-4Ma.|Quartz arenite, fine-grained lithic arenite, cleaved siltstone, granular and pebble conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Chabalowe Formation|26298|Tomahawk Beds|18304|||Yes|Formation, beds|Formal|Resvd name published|Defined|Narpa Group|37962|||Late Cambrian||||deposition|Middle Cambrian|||inferred, underlying unit|||342|NT|Yes|41204|41524|D.G.Morris, L.Bagas, P.A.Stidolph|29-NOV-84|Brakel, A.|26-NOV-86||Dolomitic quartz sandstone and siltstone, intraformational breccia; minor dolostone, mudstone; basal arkosic conglomerate.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Challis Formation|3892|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Sahul Group|16515|||Norian|213|||deposition|Carnian|232||||||WA|No|41532|41532|A.J.Mory|26-AUG-87|||Reservoir for Challis field.|Massive limestone, interbedded shale, sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Chambers River Formation|3897|||||Yes|Formation, beds|Formal|Other new published name|Defined|Maiwok Subgroup|25195|||Tonian|||inferred, overlying unit|deposition|Ectasian|1320|15|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||2000|NT|No|46679|23937|||||After Chambers River Beds of Walpole (1958). Within the Roper Group. Possibly a correlative of ungrouped units at the top of the Beetaloo Sub-basin rather than a part of the Roper Group (Yang et al. 2018).|Mudrocks, siltstone and subordinate sandstone in varying proportions: thinly interbedded siltstone, laminated siltstone to claystone and very fine-grained sandstone beds.|siliciclastic sedimentary rock|||N||17-JAN-23
Chandler Formation|27739|Chandler Limestone|3902|||Yes|Formation, beds|Formal|Variation of published name|Defined|Pertaoorrta Group|15091|||Middle Cambrian||||deposition|Early Cambrian||||||1000|NT|Yes|34186||Bradshaw J.||Brakel, A.|11-AUG-86|Age is Toyonian.|Laminated and locally contorted limestone and dolomite with numerous chert laminae, shale and evaporites in subsurfaces.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Channingum Granite|3910|New Hope Granite|31747|||Yes|Formation, beds|Formal|Other new published name|Described|||Tennant Creek Supersuite|39127|Orosirian|1840|9|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1849|5|inferred, intrusive relationship|intrusion||||No|29135||||||Tennant Creek / Davenport Province. Intrudes the Flynn Subgroup (Yungkulungu Formation). See also the informal "Channingum granite".|Medium- to coarse-grained, equigranular to seriate porphyritic granite (syeno- to monzogranite); minor rapakivi texture; hiatal-textured porphyry forms marginal phase to granite; rare felsic porphyry autoliths and late-stage aplite dykes.|acid intrusive rock|||Y|I-type|27-APR-23
Charles River Gneiss|29239|Charles River gneiss|24218|||Yes|Formation, beds|Formal|Variation of published name|Described|||Jennings Suite|30859|Paleoproterozoic|||||Paleoproterozoic||||||||No|41664|||||||Garnet-biotite gneiss, amphibolite, local migmatite|high grade metamorphic rock|||N||17-JAN-23
Chatsworth Limestone|3934|||||Yes|Formation, beds|Formal|Other new published name|Defined|Cockroach Group|37963|||Payntonian|||biozone|deposition|Iverian|||biozone|||885|QLD|No|44543|45052|||||Gola beds included in this unit in 2007 by NTGS and 2013 by GSQ, but subsequently separated again by GSQ. Relationship with Chatswood Limestone? - need to check this out with NTGS. PP08/06.|Limestone; minor breccia, marl; grey to dark grey and locally fossiliferous.Contains echinoderms.|carbonate sedimentary rock|||N||17-JAN-23
Chewings Range Quartzite|3971|Chewings Range quartzite|28451|||Yes|Formation, beds|Formal|Other new published name|Redefined|Iwupataka Metamorphic Complex|24318|||Statherian|1587|70|isotopic, Rb/Sr|deposition|Statherian|1669|13|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|31991|48992|Offe L.A.|30-SEP-78|Brown, M.C.|31-OCT-78|Arunta Block. Defined 1980. Max. deposition 1669 +/- 13 Ma (Cross et al. 2004).|Quartzite, sericite-quartz phyllite, staurolite-garnet schist|metasedimentary siliciclastic rock|||N||17-JAN-23
Chilling Sandstone|3990|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Finniss River Group|6669|||Orosirian|1820||inferred, intrusive relationship|deposition|Orosirian|1861|4|inferred, underlying unit|maximum depositional age||8000|NT|No|46676||||||See also Chilling Creek Formation of Wingate Group. Included in Finniss River Group by NTGS 1989 (89/26582).  Removed from Finniss Group by NTGS (2005). Included in Finniss River Group again 2008. Conformably overlies Burrell Creek Formation, intruded by Ti-Tree Granophyre. Maximum depositional age: 1861+/-4Ma. Around 6500m thick. Hosts the Muldiva field Sn pegmatite deposit.|White quartz sandstone, locally micaceous, ripple-marked and cross-bedded, minor conglomerate, siltstone and tuff.|siliciclastic sedimentary rock|||N||17-JAN-23
Chiripee Metamorphics|79087|Chiripee Gneiss|4021|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Mesoproterozoic|1554|||metamorphism|Paleoproterozoic|1824|11|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|69917||||||Central Arunta Region, Aileron Province. May replace Chiripee Gneiss? U/Pb SHRIMP zircon dating, Hf analytical data. Migmatitic metapelite sampled. 1824+/-11 Ma is interpreted as the maximum depositional age. Metamorphic rims: 1554 Ma, during Chewings Orogeny. Metapsammite sampled gave 1834+/-15 Ma as the maximum depositional age of the precursor sediments.|Migmatitic metasedimentary gneisses (metapelitic and metapsammitic) interlayered with metamafic intrusive rocks.|foliated metamorphic rock|metamorphosed basic igneous rock||N||17-JAN-23
Chookla Member|79227|||||Yes|Member, phase|Formal|Resvd name published|Defined|Puna Kura Kura Formation|79226|||Cambrian|||inferred, geological correlation|deposition|Ediacaran|||inferred, geological correlation||30|100|NT|Yes|71898||Normington, V. (NTGS)|01-SEP-15|NT SNSC|09-MAR-16|Map Sheet: HENBURY SG53-1, 5348. Nearest Town: Mount Ebenezer, on Kulgera SG53-5, 5447. Conglomerate and conglomeratic sandstone with rounded clasts up to  50 cm in diameter, commonly with a coarse-grained sandstone matrix. This unit will be a member of the Puna Kura Kura Formation. To be published: 2nd Edition Henbury 250K geology map and associated explanatory notes, release 2018.|Conglomerate and conglomeratic sandstone with rounded clasts up to 50 cm in diameter, commonly with a coarse-grained sandstone matrix.|siliciclastic sedimentary rock|||N||17-JAN-23
Chuall beds|28454|Chuall Beds|4051|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Paleozoic||||deposition|Paleozoic||||||||No|45155||||||Age is Early Palaeozoic. Appears in GSWA Memoir 3 (1990) which has NOT yet been indexed. PP08/06. Described in GSWA Memoir 3 (1990) , NW Birrindudu Basin,  p351, 359, 360. Possibly Devonian.|Shallow to emergent mainly fine to medium grained clayey and micaceous quartose and lithic sandstone with some low-angle cross beds and minor grit and pebble-rich beds|siliciclastic sedimentary rock|||N||17-JAN-23
Cleanskin Formation|84106|Cleanskin beds|4123|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Miocene|||||Oligocene||||||||Yes|||||Munson, T. (NTGS)|01-JUN-23||White to light grey, blocky to massive, porous unfossiliferous limestone and saprolitic limestone||||N||04-OCT-23
Cleanskin beds|4123|Cleanskin Beds|32802|Cleanskin Formation|84106|Yes|Formation, beds|Superseded|Variation of published name|Described|||||Middle Miocene||||deposition|Early Miocene||||||||No|39422||||||See also Clean Skin beds.|Loose scattered blocks of white, porous unfossiliferous limestone and saprolitic limestone along narrow blacksoil plains; pores and vughs commonly infilled by banded chalcedony.|carbonate sedimentary rock|||N||04-OCT-23
Cleia Formation|42362|Cleia Shale|34219|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Upper Jurassic||||deposition|Middle Jurassic||||||||No|5952||||||See also Cleia Shale. Of Gorter and Kirk (1995).|Thick shale|fine grained siliciclastic rock|||N||17-JAN-23
Cleland Sandstone|28456|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Late Cambrian||||deposition|Middle Cambrian|||||540|1067||No|48862|48864||||||A succession of fine- to coarse-grained and pebbly, ferruginous, partly feldspathic and micaceous sandstone; pebble beds and scattered pebbles occur throughout, mostly towards the base. Some siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Cliffdale Volcanics|4151|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Nicholson Suite|30724|Orosirian|1732|20|isotopic, Rb/Sr|eruption|Orosirian|1851|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|4000|||No|44272||||||Also in McArthur Basin (00/30118). See also Geology of Queensland 2013, p58. Hosts the Eva Mine unconformity related U and Au deposit. Hosts Copper deposits including the Norris Copper Mine. Considered co-magmatic with Nicholson Granite. Both intrude Murphy Metamorphics.|Rhyolite, alkali rhyolite and dacitic lavas, ignimbrites and intrusions; minor andesite and sedimentary intervals.|acid volcanic rock|||N||10-AUG-23
Coast Range Sandstone|21509|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|||inferred, overlying unit|deposition|Statherian|1670|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||40|NT|Yes|43292||Haines P.W.|27-FEB-95|Brakel, A.|01-MAR-95|Blue Mud Bay 1:250 000 map sheet. Age probably late Palaeoproterozoic. SHRIMP date is maximum depositional age.|White, medium- to coarse-grained, thickly bedded quartz sandstone, commonly pebbly; lenticular basal pebble or cobble conglomerate.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Cockatoo Group|4273|Cockatoo Formation|4271|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Frasnian||||deposition|Frasnian||||||2700||No|40792||||||Formerly Cockatoo "Formation" "Cockatoo Series", "Cockatoo Sandstone".|Quartz sandstone, conglomerate and limestone; minor dolomite and siltstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Cockroach Group|37963|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Lower Ordovician|||biozone|deposition|Late Cambrian|||biozone||||NT|Yes|61404|64068|Kruse, P.D.|30-JAN-03|Kruse, P.D.|30-JAN-03|Usage is different in Queensland, where clastic units form theToko Group and the dominantly carbonate Coolibah Formation and Kelly Creek Formation are placed in the Cockroach Group instead (Geology of Queensland 2013, p94-95).|Dolostone, limestone, calcarenite, calcilutite, chert, siltstone, sandstone, silicified coquinite, minor breccia, dolomitic quartz sandstone and conglomerate.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Coggans Gabbro|79092|||||Yes|Formation, beds|Formal|Variation of reserved name|Briefly described|||||Cambrian||||intrusion|Cambrian|506.4|9.6|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||||||Eastern Arunta Region, Irindina Province. U/Pb LA-ICPMS zircon dating, Hf analytical data. Emplacement age.|Weakly foliated metagabbro.|metamorphosed basic igneous rock|||Y||17-JAN-23
Coles Dam Granite|41999|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Proterozoic||||intrusion|Proterozoic||||||||No|9199|||||||Granite.|acid intrusive rock|||Y||17-JAN-23
Collara Subgroup|35509|Roper Group, Lower|25450|||Yes|Subgroup|Formal|Resvd name published|Defined|Roper Group|16319|||Calymmian|||inferred|deposition|Calymmian|||inferred|||1000|NT|No|23937|23937|Sweet I.|26-MAY-00|||Lower part of Roper Group, from Phelp Sst. up to and including Hodgson Sst.  To be used in Urapunga-Roper River 2nd ed. explan. notes - revision of Abner Sst. added Arnold Sst. Mbr., Jalboi Mbr. and Hodgson Sst. Mbr. to the constituents in this subgroup. SHRIMP dating of tuffs in Mainoru Formation (~middle of Subgroup) provide the best available age control.|Quartzose sandstone, lithic-glauconitic-ferruginous sandstone, mudstone, shale (+/- carbonaceous)|siliciclastic sedimentary rock|||N||17-JAN-23
Colless Volcanics|4338|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Kalkarindji Suite|75724|Middle Cambrian|504|||eruption|Middle Cambrian|513||||||QLD|No|44290|44989|||||Geochemically identical with Antrim Plateau Volcanics, Helen Springs Volcanics and Peaker Piker Volcanics in NT. This unit occurs in Qld & probably NT, but was originally listed as in WA too. This seems very unlikely.[CEBfeb2009]. Formerly included in Georgina Basin. Included in the Kalkarindji Suite in Oct 2009. Mentioned in Geology of Queensland 2013, p54 as being in Camooweal-Murphy domain & shown as Cambrian p87. Also subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area, 2017.|Amygdaloidal basalt, trachyte, arenite.|basic volcanic rock|||N||17-JAN-23
Colombo Sandstone|4364|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Neoproterozoic|800|||deposition|Neoproterozoic|830||||||WA|No|44397|45047|||||Age stated to be: ~830 Ma in 1998.|Massive medium grained white and purple quartz sandstone and sandy purple chert-pebble breccia.|siliciclastic sedimentary rock|||N||17-JAN-23
Confusion Dam Formation|83006|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Orosirian|||inferred||Orosirian|1969|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|||Clark, A. (GA)|28-MAR-22|Munson, T. (NTGS)|25-NOV-22|Named after dam approx. 10 km to the south of type intersection. Type section in drill-hole NDIBK04, down-hold depth from 236 m to 416 m. Drilled at 635380mE and 783955.mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. Lithologically comparable to parts of the Alroy Formation. However, an atypical detrital zircon maximum deposition age (1969+/-10 Ma) obtained from this formation is significantly older than the Alroy Formation and the overlying Kerringnew Formation (Cross/Kositcin et al. in prep). The unimodal age spectra obtained from this sample, albeit from only nine analyses, is also inconsistent with other detrital zircon age spectra from the Alroy Formation or the overlying Kerringnew Formation.|Dark- to light-grey banded phyllite and massive graphitic phyllite. Schistose in parts. Minor intervals of carbonate. Banding is generally several mm thick and corresponds mainly to the quantity of graphite in the rock.|metasedimentary siliciclastic rock|||N||21-MAR-23
Coniston Schist|24221|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1780|10|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1780|10|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992|48992|A.J.Stewart|26-JUL-73|Strusz, D.L.|05-NOV-73|Intrudes between Lander Rock beds and Mount Thomas Quartzite (Reynolds Range Group). 1780 Ma zircon date reported by Smith (2001) may not date the intrusion due to contamination|Biotite-sericite-quartz orthoschist with quartz and feldspar augen, minor microgranite.|metamorphosed acid igneous rock|||Y|S-type|17-JAN-23
Connellys Volcanics|68733|Connelly Volcanics|37733|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian|1845|||eruption|Orosirian|1860||||||NT|Yes|69423||Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area.   Age as shown on Mt Drummond 250K 2nd edition map (2006). previously mapped within Murphy Metamorphics.|Red-brown, altered-weathered, porphyritic rhyolite or rhyodacite ("redrock") with locally abundant quartz veins|acid volcanic rock|||N||17-JAN-23
Conner Member|78894|||||Yes|Member, phase|Formal|Resvd name published|Defined|Areyonga Formation|571|||Sturtian|660||inferred, overlying unit|deposition|Sturtian|720||inferred, underlying unit||||NT|Yes|71842||Normington, V. (NTGS)|10-JUL-14|Williams, B., Normington, V.|10-APR-18|Map Sheet: AYERS ROCK. Nearest Town: Yulara. This is the only known occurrence of these sediments and sit stratigraphically between diamictites of the Areyonga Formation and stromatolitic dolostones of the Aralka Formation. It has therefore been identified as being part of the upper Areyonga Formation and is assumed Sturtian in age. Proposed publication: Edgoose CJ, Normington VJ, Haines PW and Allen H, in prep. Revised Neoproterozoic stratigraphy in the Mount Conner Area, Amadeus Basin, NT. Northern Territory Geological Survey Record. Also: NTGS mapping of the western Amadeus Basin and associated explanatory notes.|Aeolian sandstone - clean, quartz sandstone with evenly sized, well rounded medium-sized, well sorted quartz grains overlying a lower sandstone that is massively bedded and well laminated. The sandstone has large angle cross beds with foresets.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Constance Sandstone|24864|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|Accident Subgroup|37738|||Calymmian|1468|36|isotopic, U/Pb-Pb/Pb ion probe|deposition|Calymmian|1591|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|100|1100|QLD|Yes|44272|65337|||Withnall, I.W.|09-MAY-06|See also Lexicon. Defined 1960, 1961.  SE53-8,12.  Age updated by AGSO's NABRE project, 1998 [but not accepted by Sweet 2006 redefinition]. Top age inferred by correlation with Roper Group. Part of the South Nicholson Group. Also referred to as Constance Range Sandstone. Underlies Georgina Basin.|Dominantly thickly-bedded, cross-bedded, medium- to coarse-grained, granule-rich and occasionally pebbly, quartz or sublithic sandstone; interbedded red to grey-green fine-grained sandstone to siltstone; minor shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Conway Formation|4462|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Statherian||||deposition|Statherian||||||100|NT|No|44299|43010|||||Formerly of McArthur Group. Age: Statherian.|Upper chert bands (silicified carbonate), massive to weakly stromotolitic; lower cherty to dolomitic siltstone, laminated; sandstone, dolomitic; interbedded mudstone.|non-carbonate chemical or biochemical sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Coodna Member|38421|Coodna|35281|||Yes|Member, phase|Formal|Resvd name published|Defined|Hayward Creek Formation|8199|||Statherian||||deposition|Statherian||||||1300||No|24304|23733|||||Reserved as Coodna (Donnellan, 2000). Within the Tomkinson Creek Group.|Lithic, sublithic and feldspathic-sublithic sandstone, and pebbly sandstone. Medium- to coarse-grained, and grain size laminated thinly to thickly bedded, planar and very shallow-angle cross-bedded in laterally persistent bed sets.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Cooley Dolostone Member|78840|Cooley Dolomite Member|4530|||Yes|Member, phase|Informal|Variation of published name|Described|Barney Creek Formation|1130|||Statherian|||inferred, overlying unit|deposition|Statherian|||inferred, underlying unit||||NT|No|64815||||||Intended to replace Cooley Dolomite Member. See NTGS Special Pub 5 (2013) p15:18. See Cooley Dolomite Member in  Jackson et al. 1987, p98 for type section information.|One or more intraformational, locally-derived (from the Emmerugga and Teena Dolostones), fault-related chaotic breccias; clasts range from millimetres to several tens of metres.|carbonate sedimentary rock|||N||17-JAN-23
Coolibah Formation|4543|||||Yes|Formation, beds|Formal|Other new published name|Defined|Toko Group|18263|||Dapingian|||biozone|deposition|Floian|||biozone|||110|NT|No|44358|45052|||||See also Coolibah beds. Usage is different in Queensland, where clastic units form the Toko Group and the dominantly carbonate Coolibah Formation and Kelly Creek Formation are placed in the Cockroach Group instead (Geology of Queensland 2013, p94-95). Some rocks previously included in the Mesoproterozoic NT Coolibah Formation by Laing and Allen (1956), are now named the Wondoan and Stubb Formations of the Tijunna Group, Birrindudu Basin.|Limestone, quartzose limestone, dolostone, marl and local lenticular chert; basal interval of sandstone, conglomerate or silicified microbial boundstone.|carbonate sedimentary rock|siliciclastic sedimentary rock|continental rift|N||17-JAN-23
Coomalie Dolostone|42256|Coomalie Dolomite|4580|||Yes|Formation, beds|Formal|Variation of published name|Described|Mount Partridge Group|13012|||Paleoproterozoic|2019|4|inferred, overlying unit||Paleoproterozoic|2500|||||600|NT|No|24442||||||Dolostone now preferred term. Advised by P.Kruse (Nov 2004). Hosts a number of Au-Pt-Pd prospects and the Yarram iron ore deposit. Also hosts the Kylie unconformity-related U deposit.|Stromatolitic, magnesite and marble, in places chloritic and tremolitic, commonly silicified or lateritised at the surface; metalutite, commonly graphitic.|metasedimentary carbonate rock|||N||17-JAN-23
Coomarie Sandstone|4586|||||Yes|Formation, beds|Formal|Other new published name|Defined|Birrindudu Group|1735|||Statherian|1640||inferred, overlying unit|minimum depositional age|Statherian|1768||inferred, underlying unit|maximum depositional age|400|2500|NT|No|29804|45140|||||Latest age control (summarised, Crispe et al 2007) suggest Birrindudu Basin ranges from 1735-1640 Ma.|Sublithic arenite and minor quartz arenite, mainly medium-grained, thin-bedded to flaggy, showing cross-bedding and ripple marks; siltstone and shale. Shale pellets common in the sublithic arenite.|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Coora Dolerite|73196|Dead Bullock Soak dolerite|73199|||Yes|Bed|Informal|Other new published name|Described|Callie Member|40762|||Orosirian||||intrusion|Orosirian|1864||inferred, intrusive relationship|||||No|62580||||||See also the informal Coora dolerite. Of Dead Bullock Formation or intrudes Dead Bullock Formation?|Fine- to coarse-grained basalt and amphibole-pyroxene-plagioclase dolerite; minor graphitic siltstone and claystone; semi-conformable with bedding.|basic volcanic rock|||Y||17-JAN-23
Copia Granite|26495|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Jervois Suite|30860|Statherian|1760|||intrusion|Statherian|1780||||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|24-JUN-74|Intruded by Ida Granite.|Coarse gneissic biotite granite.|acid intrusive rock|||Y||17-JAN-23
Corcoran Formation|27379|||||Yes|Formation, beds|Formal|Other new published name|Defined|Maiwok Subgroup|25195|||Ectasian|1417|29|inferred, overlying unit|deposition|Calymmian|1492|4|inferred, underlying unit||20|505|NT|No|44332|23937|||||Formerly included in lower Roper Group before redefinition of the Maiwok Subgroup (Roper Group) to include it and Bessie Creek Sst. In Urapunga- Roper River area. Min age from Velkerri Formation. Max age from Mainoru Formation.|Lower part: red to brown ferruginous sandstone, siltstone, mudstone, conglomerate and pisolitic ironstone; grades upward into laminated green-grey to black mudstone and siltstone, minor fine sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Cordillo Silcrete|4714|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|||||Miocene|||||Oligocene||||||||No|38605|66623|||||Data from Strzelecki 1:250k explan notes (1995) suggest that this material could well be mainly late Tertiary [?Pliocene], not Oligocene-Miocene as suggested by Wopfner (1974), see . See also Cordillo Surface.|Variably siliceous, sheet-like bodies of silica-indurated sandstone and some conglomerate, now mainly comprising chalcedonic and locally opaline rocks; light grey to pale orange-brown.|regolith|||N||17-JAN-23
Corkwood Hill Granite|75784|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Devonian||||magmatic crystallisation|Devonian|386.9|3.5|isotopic, U/Pb-Pb/Pb ion probe|||||No|64337||Edgoose, C. (NTGS)|27-OCT-10|||Not named after a geographical location.  To be published by NTGS:  Alcoota 1:250,000 2nd edition geological map|Weakly-deformed, fine-grained biotite granite.|acid intrusive rock|||Y||17-JAN-23
Coronation Sandstone|4739|Coronation Member|4738|||Yes|Formation, beds|Formal|Variation of published name|Defined|El Sherana Group|24261|||Paleoproterozoic|1827|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Paleoproterozoic|1870|||||600|NT|Yes|31723||Stuart-Smith P.G.||Brakel, A.|25-OCT-83|Originally of Needham and Stuart-Smith (1985). Definition card 1983?  Formerly Coronation Member (Edith River Volcanics). Intruded by Jim Jim Suite. Up to 600m thick. Hosts Coronation Hill Au deposit and small U deposits.|Trough cross-bedded, coarse to very coarse, moderately sorted quartz to sublithic sandstone; polymictic pebble to cobble conglomerate with lenses of poorly sorted medium to coarse lithic sandstone at base; minor felsic volcanics|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Corrie Member|4749|Corrie Limestone Member|4748|||Yes|Member, phase|Formal|Resvd name published|Defined|Ninmaroo Formation|14173|||Warendan|||biozone|deposition|Warendan|||biozone|||210|QLD|Yes|46897||Druce E.C., Radke B.M., Shergold J.H.||Whitaker, W.|21-DEC-79||Medium to thick bedded limestone (pelmatozoan grainstone (grain supported carbonate rocks (Dunham, 1962)) ooid and peloidal (pellet-like) grainstone, skeletal peloidal clast grainstone); minor cross-stratified dolomitic sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Cosmo Supergroup|72987|||||Yes|Supergroup|Formal|Other new published name|Briefly described|||||Orosirian|1861|4|inferred, lithostratigraphic correlation||Orosirian|1863|2|inferred, lithostratigraphic correlation|||||No|67355||||||Name from AGES 2007 record of Abstracts. Requested by O.Raymond (HG 2007). Ages from interlayered volcanics. [Is age really that tightly constrained? On what basis? CEB Nov2011] RefID 67232 (2011) gives age as1860-1840 Ma. Finniss River Group min age ~. See also Cosmo Howley supergroup, published 2006.|Carbonaceous shale, banded iron formation, mudstone, siltstone, felsic tuffs, carbonate.|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Cottee Formation|24881|||||Yes|Formation, beds|Formal|Other new published name|Defined|Katherine River Group|9312|||Statherian|1740|||deposition|Statherian|1760|||||350|NT|No|44400|43010|||||Age: Statherian.|Thinly interbedded red mudstone, siltstone, fine sandstone and dolostone with mudflakes, halite casts, synaeresis cracks and erosion structures (tool marks and flute casts) in places; glauconitic sandstone, green mudstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Coulters Sandstone|24230|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Orosirian|1809|18|inferred||140|1000|NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project. Definition by Sweet I.P. 07-OCT-1981? Within the Hatches Creek Group. Part of the Tennant Creek Inlier.|Ridge-forming quartz arenite and slightly feldspathic or lithic quartz arenite; minor pebbly arenite and recessive friable kaolinitic or sericitic arenite, siltstone and altered basaltic? lava.|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Cox Formation|24636|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Kiana Group|69563|||Ediacaran||||deposition|Ediacaran|||||||NT|Yes|44332|42812|Dunn P.R. et al|02-MAR-94|Kruse, P.D.|24-FEB-94|Unit named by Dunn in 1963, but not defined then.  See also Plumb and Paine, 1964). New definition from Tim Munson expected to incorporate former Hayfield mudstone within this unit, and the Hayfield Sandstone Member.|Very fine- to fine-grained, usually micaceous sandstone, thinly interbedded with micaceous siltstone and shale, overlain by finely laminated siltstone and shale. Finer-grained lithofacies may be low-angle cross-stratified.|siliciclastic sedimentary rock|||N||04-SEP-23
Coxco Dolostone Member|76090|Coxco Dolomite Member|27753|||Yes|Member, phase|Formal|Variation of published name|Described|Teena Dolostone|76084|||Statherian||||deposition|Statherian|1639|6|isotopic, U/Pb-Pb/Pb ion probe|eruption|||NT|No|64815||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). See Coxco Dolomite Member. Material dated was interpreted as airfall tuff (RefID 23398, 2000)|Grey crystalline dololutite with radiating, needle-like gypsum crystal pseudomorphs normal to bedding; rare conical stromatolites; uncommon thin interbeds of dolomitic shale and siltstone.|carbonate sedimentary rock|||N||17-JAN-23
Crater Formation|27960|||||Yes|Formation, beds|Formal|Other new published name|Defined|Mount Partridge Group|13012|||Paleoproterozoic|2019|4|inferred, overlying unit|deposition|Neoarchean|2527|15|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||900|NT|No|44315|44314|||||See also Lexicon. Formerly of Batchelor Group. Maximum depositional age from detrital zircons.|Feldspathic quartz sandstone, quartz-pebble conglomerate, poorly sorted BIF-quartz pebble-boulder conglomerate, siltstone, mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Cravens Peak beds|4859|Cravens Peak Beds|4858|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Eifelian|||biozone|deposition|Pragian|||biozone|||280||No|8217||||||Originally included rocks now mapped as Ethabuka Sandstone and Poodyea Formation. Toko Syncline, Georgina Basin (Geology of Queensland 2013, p96)|Calcareous sandstone and siltstone, limestone, minor conglomerate; grades upward into quartz sandstone and conglomerate.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Crawford Formation|27754|||||Yes|Formation, beds|Formal|Other new published name|Defined|Collara Subgroup|35509|||Ectasian|||inferred|deposition|Calymmian|1490||inferred||0|235|NT|No|44436|23937|||||First published 1963, defined Roberts & Plumb (1965). Originally mapped by Dunnet (1965) as upper sandy part of  'Wigram Formation' and the overlying 'Pobasso Formation' of  'Malay Road Group'.  Occurs in the Beetaloo Sub-basin.|Thickly bedded, mostly fine-grained micaceous and glauconitic sandstone; subsidiary thinly interbedded sandstone, siltstone and mudstone; minor trough cross-bedded medium quartz sandstone.|siliciclastic sedimentary rock|||N||06-SEP-23
Creswell Creek Formation|84107|Mittebah Sandstone|82071|||Yes|Formation, beds|Formal|Other new published name|Fully described|Benmara Group|42492|||Statherian|||||Statherian|1658|23|||450|1700|NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|Outcrops across the northwestern MOUNT DRUMMOND and northeastern BRUNETTE DOWNS 1:250 000 mapsheets, with isolated outcrops across the southern CALVERT HILLS and southeastern WALHALLOW 1:250 000 mapsheets. Mittebah Formation is used in the rest of the former extent of the Mittebah Sandstone.|Mainly pale yellow to pink, fine - medium-grained (± coarse-grained), quartzose to lithic sandstone, w local conglomerates, mainly chert, quartzite and quartz clasts. Sst  planar-bedded w planar and trough x-beds. One siltstone interval.||||N||04-OCT-23
Cretaceous sedimentary rocks 76565|76565|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Cretaceous|65|||deposition|Lower Cretaceous|97|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Cretaceous sedimentary rocks 76566|76566|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Cretaceous|97|||deposition|Lower Cretaceous|141|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Crooked Hole Granite|26504|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Jervois Suite|30860|Statherian||||intrusion|Statherian|1806|12|isotopic, U/Pb-Pb/Pb ICP-MS||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|24-JUN-74|Previously informally referred to as Crooked Hole Creek Granite. Intrudes Delmore Metamorphics and probably the Mapata Gneiss with sharp margins. Intruded by Woodgreen Granite Complex. Similar to Copia Granite. Intrudes Delny Gneiss.|Foliated biotite granite and granodiorite, pegmatite.|acid intrusive rock|||Y||17-JAN-23
Crossing Bore schist|81443|Crossing Bore Schist|83162|||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||Cambrian|||inferred, geological correlation||Cambrian|||inferred, geological correlation|||||No|70839||||||Irindina Province. Sample location rather than unit name.|||||Y||17-JAN-23
Crow Formation|37729|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wild Cow Subgroup|37739|||Calymmian|1450|||deposition|Calymmian|1483|12|isotopic, U/Pb|maximum depositional age||2500|NT|Yes|24442|65337|Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|Within the South Nicholson Group. Mount Drummond 1:250 000 map sheet area. Conformably or disconformably overlain by Mittiebah Sandstone; disconformably or unconformably overlain by Constance Sandstone. Parts of this unit now (2023) redefined as Racecourse Formation, Mingabarri Formation.|Interbedded lithic micaceous siltstone and fine-grained sandstone, red-brown to grey shale, chalky white claystone, fine- to medium-grained, quartzose to sub-lithic sandstone; minor very coarse-grained sandstone and conglomerate.|siliciclastic sedimentary rock|||N||09-OCT-23
Crown Point Formation|26505|Crown Point Series|79135|||Yes|Formation, beds|Formal|Other new published name|Defined|||||Asselian||||deposition|Pennsylvanian||||||350||No|48865|48865||||||Conglomerate, diamictite, cross-bedded pebbly and coarse sandstone, ripple-laminated fine sandstone and siltstone, thick claystone-dominated intervals with varvite bands.|siliciclastic sedimentary rock|||N||17-JAN-23
Culaly Amphibolite|76183|Zamu Dolerite|27310|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic|||inferred||Neoarchean|||inferred||||NT|Yes|67779|67779|Glass, L.M., Hollis, J.A. (NTGS)|03-OCT-11|Whelan, J., Normington, V.|07-AUG-14|Replaces Zamu Dolerite (of Ferguson and Needham 1978) in part. Age poorly constrained. May be Archean, but given Proterozoic map symbol.|Amphibolite: moderately foliated, locally garnetiferous: garnets have asymmetric tails, are commonly poikilitic with encircling coronas of recrystallised feldspar.|high grade metamorphic rock|||Y||17-JAN-23
Cullen Supersuite|30778|||||Yes|Supergroup|Formal|STRATLEX Entry|Described|||||Orosirian|1820||||Orosirian|1835|||||||No|50586||||||Pine Creek Province. More or less equivalent to Cullen Batholith. See also Cullen Suite, Cullen Granite, Cullen Granite Complex (defined). Extensive and uniform suite of I- and lesser A-type granites and comagmatic volcanics (Etheridge et al 1987, Wyborn 1988). Tin occurs in mineralised quartz veins in the contact aureoles of granites from this supersuite.|Predominantly I-type granites. I-type, granodioritic, consisting of 3 major pluton types: leucogranites, uniform granodiorite to granite suites and concentrically zoned plutons.|acid intrusive rock|||Y|I-type|17-JAN-23
Cumming Leucogabbro|29771|Cumming Meta-Leucogabbro|21587|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Proterozoic||||intrusion|Proterozoic|||||||NT|Yes|43225|43503|Shaw R.D., Wakelin-King G.|22-MAY-91|||Arunta Block.  Age indeterminate.|Actinolite and tremolite-bearing rocks (meta-ultrabasic rock and metamorphosed leucogabbro), minor microgranite|metamorphosed basic igneous rock|||Y||17-JAN-23
Currant Bush Limestone|5070|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Narpa Group|37962|||Drumian||||deposition|Drumian||||||500|NT|No|34395|44210|||||SE53-12. Contains thin oil shale, bituminous limestone and bituminous shale. By inference, the type locality is in the vicinity of Currant Bush Creek, 16 km SW of Thorntonia homestead. No type section has been specified (Shergold et al., 1976).|Thin-bedded, bituminous limestone with chert, shale, marl and dolomite lenses.|carbonate sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Currinya Clay|31345|Curinya Clay|30580|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Neogene||||deposition|Neogene||||||||No|61385||Lau J.E.|05-NOV-96|||Mount Doreen SF52-12. [Reference previously gave age as Permian.This was an indexing error, now corrected CEB 16-DEC-2011]|Clay, silt, micrite; dark-coloured; shelly; pyritic; lacustrine (littoral carbonate).|sediment|||N||17-JAN-23
Cyclops Member|26509|||||Yes|Member, phase|Formal|Other new published name|Redefined|Pertatataka Formation|15094|||Ediacaran||||deposition|Ediacaran|650|15|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|48890|48890|||Beyer, E., Normington,V.|08-DEC-15|In the Amadeus Basin. See also the informal Cyclops member. Maximum depositional SHRIMP U-Pb detrital zircon age of c.807 Ma (Maidment et al (2007). Recent detrital zircon grain analysis via U-Pb isotopic methods (SHRIMP) produced a maximum depositional age of 650 ± 15 Ma (Kositcin et al 2015).|Platy sandstone, very thinly bedded and laminated, evenly and rhythmically bedded.|siliciclastic sedimentary rock|||N||02-JUN-23
Dalumbu Sandstone|21611|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Alyangula Subgroup|21122|||Statherian||||deposition|Statherian||||||1000|NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Within the Groote Eylandt Group.|White, coarse-grained, cross-bedded, pebbly (mainly quartz) quartz-rich sandstone with granule lenses; white to pink, medium-grained, cross-bedded quartz-rich sandstone; basalt, very weathered and ferruginised.|siliciclastic sedimentary rock|||N||17-JAN-23
Daly River Group|5163|||||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Middle Cambrian|||inferred, lithostratigraphic correlation|deposition|Middle Cambrian|||biozone|deposition||708.5|NT|Yes|44954|42012|Kruse P.D.|21-APR-88|||Originally Noakes (1949). See also Lexicon. Defined by Randal(1962). Redefined by Kruse 1988. Ages determined by biozones. Revised in RefID 70380 Tickell et al. (2015) to exclude Early Ordovician rocks now recognised as Florina Formation.|Limestone, siltstone, sandstone, conglomerate. Karstified.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Darbilla Formation|5202|||||Yes|Formation, beds|Formal|Other new published name|Described|Arafura Group|522|||Famennian|||biozone|deposition|Famennian|||biozone|||||No|42058||||||Previously considered early Carboniferous.|Mudstone, sandy siltstone and lesser interbedded sandstone; includes fining-upward intervals; palynoflora.|siliciclastic sedimentary rock|||N||17-JAN-23
Dare Siltstone Member|5204|||||Yes|Member, phase|Formal|Other new published name|Defined|Parke Siltstone|14883|||Devonian||||deposition|Devonian|||||||NT|No|31566|31566|||||Within the Pertnjara Group.|A cyclic succession of laminated and massive siltstone. Thin beds of very fine-grained calcareous sandstone occur near the base; thin beds of fine-grained silty sandstone occur towards the top.|fine grained siliciclastic rock|||N||17-JAN-23
Darwarunga Sandstone|5252|Darwarunga Formation|5251|||Yes|Formation, beds|Formal|Variation of published name|Defined|Habgood Group|7964|||Statherian||||deposition|Statherian|1661|19|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||350|NT|No|32660|43010|||||SHRIMP date is a maximum depositional age.|Lower part (ridge forming): sandstone; minor stromatolitic chert (silicified carbonate) and cauliflower chert nodules. Upper part (recessive): sandstone, dolomitic siltstone and silty dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Darwin Formation|5253|Darwin Member|5258|||Yes|Formation, beds|Formal|Variation of published name|Defined|Bathurst Island Group|1249|||Albian|||inferred, biostratigraphic correlation|deposition|Aptian|||inferred, biostratigraphic correlation||||NT|No|44965|42442|||||Supersedes Darwin Member? See also Lexicon.  Along with the Petrel Formation, equivalent to the former "Mullaman Beds". Different unit from Darwin Granite in Tasmania. Shown as Aptian to Albian in 2015|Kaolinitic claystone, commonly radiolaria-rich, silty in places, montmorillonitic, glauconitic and calcareous when fresh; basal conglomerate; minor bioturbated siltstone, carbonate, sandy claystone and clayey sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Dashwood Gabbro Complex|21620|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Mesoproterozoic|||inferred|intrusion|Mesoproterozoic|||inferred||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C. & Wakelin-King G.A.|07-MAY-92|||Mostly Southern Province of Arunta Block. Defn card with Subcommittee.  Age inferred only. See also Dashwood Gabbro.|Altered gabbro, dolerite, ultramafic rocks; leucocratic quartzofeldspathic gneiss|basic intrusive rock|||Y||17-JAN-23
Datson Member|5263|||||Yes|Member, phase|Formal|Resvd name published|Defined|Ninmaroo Formation|14173|||Warendan|||biozone|deposition|Warendan|||biozone|||295|QLD|Yes|46897||Druce E.C., Radke B.M., Shergold J.H.|08-AUG-06||||Thin to thick bedded limestone or dolostone (skeletal grainstone, boundstone, peloidal (pellet-like) grainstone, clast grainstone and lime mudstone (Dunham, 1962)). Characterised by dolomitisation and interlaminated cherts.|carbonate sedimentary rock|||N||17-JAN-23
Davenport Dacite|42087|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|1862|5||eruption|Paleoproterozoic|1862|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|23809||||||Previously mapped as part of Warramunga Group on BONNEY WELL 1:250 000 sheet.||acid volcanic rock|||N||17-JAN-23
Davenport Province - moderately magnetic rocks 79892|79892|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Davenport Province - strongly magnetic rocks 79909|79909|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Davenport Province - weakly magnetic rocks 80185|80185|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Dead Bullock Formation|35396|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tanami Group|17763|||Orosirian|1838|6|isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1865|12|isotopic, U/Pb-Pb/Pb ion probe||1000|4000|NT|Yes|50315||Hendrickx M.|11-JAN-00|||~1km thick. Hosts gold deposits.|Grey siltstone, intercalated chert, interbedded silty shale, fine grained sandstone, laminated siltstone, massive quartzite, fine grained black shale, boudin chert, calc-silicate? (Fe-amphibolite interlayered with massive chert), amphibolite.|siliciclastic sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Dead camel granite|79061|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Statherian||||intrusion|Statherian|1736|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|64956||||||Informal name for 'medium-grained felsic intrusive' intruding the Albarta Metamorphics, east Arunta Region. Limbla 1:100k sheet area.|medium-grained felsic intrusive|acid intrusive rock|||N||17-JAN-23
Deagan Member|32407|Deagan|29856|||Yes|Member, phase|Formal|Resvd name published|Defined|Short Range Sandstone|26139|||Statherian||||deposition|Statherian||||||150||No|23410|24303|Donnellan N.|13-JUL-95|||Formerly undifferentiated Tomkinson Creek beds. Helen Springs, Tennant Creek 1:250 000 sheet area.  Disconformably to conformably overlain by the Short Range Sandstone middle lithofacies within the Tomkinson Creek Group.|Siltstone; subordinate interbedded sandstone: quartz arenite and minor pebbly arenite; conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Dean Quartzite|5300|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Tonian|750|||deposition|Tonian|850|||||100||No|48842|48864|||||Mount Harris Basalt has been thrust over Dean Quartzite at Mt Harris. Correlated with Heavitree Quartzite in northern Amadeus Basin.|Fine to coarse grained quartzite, quartz sandstone; minor vein quartz pebble conglomerate, sericite-quartz schist, quartz-kyanite-muscovite layers, feldspathic sandstone.|metasedimentary siliciclastic rock|siliciclastic sedimentary rock||N||20-SEP-23
Deception Formation|5310|Deception Member|32909|||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Late Cambrian|||inferred, overlying unit|deposition|Middle Cambrian|516|11|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||175|NT|No|48863|48863|||||Defined 1965. See also Deception Sandstone and Deception Siltstone, both probably misspelt. A recessive unit in the Gardiner Range.|Red-brown micaceous siltstone, shale; interbeds of quartz sandstone, dolostone and limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Deep Bore Metamorphics|23539|||||Yes|Formation, beds|Formal|Other new published name|Redefined|||||Statherian|1730|7|inferred, structural relationship|metamorphism|Orosirian|1808|5|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|39887|49036|R.G.Warren|10-NOV-80|Munson, T. (NTGS)|25-AUG-22|Previously mapped as Arunta Complex. Intruded by Marshall Granite (age 1791+/-3 Ma). Underwent high-T, low-P metamorphism (3 - 4 kbar and 750 - 800 degrees C) during the Strangways Orogeny at 1730 +/- 7 Ma.|Pelitic and quartzose metasediments containing cordierite, sillimanite, garnet, biotite and albite; calc-silicate rock; mafic granulite; layered amphibolite; cordierite quartzite|metasedimentary siliciclastic rock|metamorphosed acid igneous rock||N||17-JAN-23
Deering Siltstone Member|25875|||||Yes|Member, phase|Formal|Other new published name|Defined|Parke Siltstone|14883|||Upper Devonian||||deposition|Middle Devonian|||||||NT|No|31566|31566|||||Within the Pertnjara Group. Basal member of Parke Siltstone.|Alternating laminated and massive red-brown siltstone; local thin limestone or calcareous siltstone beds; sandstone beds are sporadic and fine- to very fine-grained. Various sedimentary structures listed.|siliciclastic sedimentary rock|||N||17-JAN-23
Delaney Mudstone Member|21635|Claraville Mudstone Member|76721|||Yes|Member, phase|Formal|Resvd name published|Briefly described|Hale Formation|25689|||Eocene|||inferred, lithostratigraphic correlation|deposition|Eocene|||inferred, lithostratigraphic correlation|||||No|43748||Senior B.|22-DEC-94|||Of Tertiary Hale Formation. Subject to convenor's approval. Replaced the invalid Claraville Mudstone Member.|Olive green mudstone and siltstone.|fine grained siliciclastic rock|||N||17-JAN-23
Delmore Metamorphics|26516|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|||||Orosirian|1806|21|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|Age given as Precambrian. Map symbol shown as pCr on Defn Card, but p-Cl used on Alcoota 1:250 000 sheet. Intruded by Mount Ida Granite.|Calc-silicate rock, microcline-bearing pelitic gneiss, epidote quartzite, anthophyllite-chlorite-cordierite rock; rare epidote|metasomatic rock|foliated metamorphic rock||N||17-JAN-23
Delny Gneiss|5354|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|||||Statherian|||||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|Intruded by Copia Granite.|Meta-sedimentary gneiss, schist, amphibolite, minor quartzite, rare calcsilicate gneiss, abundant pegmatite intrusions.|foliated metamorphic rock|high grade metamorphic rock||N||17-JAN-23
Denara Orthogneiss|79232|Strangways Metamorphic Complex|17395|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1744|4|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Statherian|1778.7|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71592|72516|Reno, B. (NTGS)|05-NOV-14|Munson, T.|15-NOV-18|Jervois Range 1:100k sheet area 6152 . Strongly foliated and compositionally layered migmatitic orthogneiss. An extensive nextwork of leucosomes contain Kfs and peritectic garnet; melanosomes are Bt rich. To be published: End of 2015 in the Jervois Range 1:100 000 Map sheet and the accompanying explanatory notes published by NTGS.|Strongly foliated and compositionally layered migmatitic orthogneiss. An extensive nextwork of leucosomes contain K feldspar and peritectic garnet; melanosomes are bioite rich.|high grade metamorphic rock|||Y|I-type|17-JAN-23
Depot Creek Sandstone|5379|Depot Creek Sandstone Member|5378|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Tolmer Group|18275|||Statherian|1700||inferred, geological correlation|deposition|Orosirian|1837|15|isotopic, U/Pb-Pb/Pb ion probe|||1500|NT|Yes|32700||Edgoose C.||Brakel, A.|23-JAN-85|Unconformably overlies the Pine Creek Geosyncline. RefID 65232: Correlated with upper part of Katherine River Group gives depositional age of 1720-1700 Ma. In Litchfield Province/Domain, probably not Central Domain.|Cross-bedded and ripple-marked, medium- to coarse-grained sandstone, conglomerate and orthoquartzite.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Derim Derim Dolerite|35928|Derim Derim Dolerite Suite|31695|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||||Ectasian|1312.9|.7|isotopic, U/Pb-Pb/Pb, TIMS|intrusion|Ectasian|1327.5|.6|isotopic, U/Pb-Pb/Pb, TIMS|magmatic crystallisation|20|281.4|NT|No|23374|23937|||||Referred to as "Basic Intrusives" by Dunn (1963b). Reserved as Derim Derim Dolerite Suite. Intrudes Mount Rigg Group; intrudes Roper Group as sills, and some dykes. Best identified by magnetic signature. SHRIMP date on baddelyite.|Fine to coarse grained dolerite and gabbro sills.|basic intrusive rock|||Y||23-JAN-23
Devils Marbles Granite|5434|Devil's Marbles Granite|32651|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Devils Suite|30736|Statherian|1711|11|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1711|11|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|49033|49033|Wyche S.||Brakel, A.|17-FEB-84|Tennant Creek / Davenport Province.|Pink, medium- to coarse-grained two-mica granite with phenocrystic microcline and subhedral andesine; accessory minerals are fluorite, titanite, apatite, zircon and opaque oxides.|acid intrusive rock|||Y|I-type|17-JAN-23
Devils Suite|30736|||||Yes|Group, Suite|Formal|STRATLEX Entry|Fully described|||||Statherian|1711|2|||Statherian|1720|||||||No|50588||||||Includes the Warrego, Elkedra and Devils Marbles Granites. This Suite was described as I-type in 2002 and previously by Budd et al., but the Warrego Granite has been described as S-type in the NTGS Tennant Creek notes.|Porphyritic and even-grained muscovite-biotite or biotite granite, fine-to coarse-grained, locally xenolithic; minor pegmatite, aplite, greisen|acid intrusive rock|||Y|I-type|10-AUG-23
Devoncourt Limestone|5439|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||210||No|44211|44276|||||Defined 1961.|Interbedded  limestones: laminated, marly, foetid, and nodular; calcareous shale; minor intraformational breccia; trilobite fossils locally.|carbonate sedimentary rock|||N||17-JAN-23
Devonian sedimentary rocks 76554|76554|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Famennian||||deposition|Middle Devonian|384|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset.|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Devonian to Carboniferous sedimentary rocks 76547|76547|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mississippian|314|||deposition|Lower Devonian|410|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Dhalinybuy Granite|21653|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Giddy Suite|30863|Orosirian|1710|||intrusion|Orosirian|1870||||||NT|Yes|43292|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94||14-MAR-95|Previously included in Spencer Creek Volcanics by Dunnet (1965). Intrudes Bradshaw Complex, overlain by Yanungbi Volcanics and Gove Sandstone (Spencer Creek Group). To become part of (reserved) Wanyanmera Suite.|Massive to foliated, pink to green, medium- to coarse-grained, equigranular to porphyritic, quartz-K-feldspar-biotite granite. Plagioclase and garnet are minor localised components. Localised mylonite lenses.|acid intrusive rock|||Y||17-JAN-23
Dhunganda Formation|21654|Ritarango beds|16120|||Yes|Formation, beds|Formal|Resvd name published|Defined|Donydji Group|21680|||Statherian|1706|10|inferred, overlying unit|minimum depositional age|Statherian|1726|6|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation||500|NT|Yes|44112|44112|Rawlings D.|01-MAR-95||16-MAR-95|Arnhem Land.The maximum age is poorly constrained by an inferred age of ~1870 Ma for the underlying Mirarrmina Complex (based on correlation with Bradshw Complex in eastern Arnhem Bay/western Gove mapsheet areas; Plumb and Roberts, 1992). Tentatively correlated with Aquarium Formation on the basis of similar lithofacies (2006 Robinson River Explan Notes.)|Sandstone: silicified, white, fine to coarse grained, locally pebbly, quartzose, cross bedded, commonly sheared; minor recessive mudstone; altered felsic voncanic rock.|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Dhupuwamirri Member|21655|||||Yes|Member, phase|Formal|Resvd name published|Defined|Fagan Volcanics|24971|||Statherian|||inferred|deposition|Statherian|1706|10|isotopic, U/Pb-Pb/Pb ion probe|deposition||550|NT|Yes|22600|44112|Rawlings D.|01-MAR-95||16-MAR-95|Arnhem Bay-Gove 1:250 000 map sheet.|Rhyolite: porphyritic with phenocrysts of K-feldspar, quartz and albite, massive to flow banded; volcaniclastic mudstone, sandstone and breccia; dolerite, basalt and hybrid rocks.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Diamond Creek Volcanics|30418|Diamond Creek Formation|5449|||Yes|Formation, beds|Formal|Variation of published name|Defined|Katherine River Group|9312|||Statherian|1720|||eruption|Statherian||||||230|NT|Yes|46678||Sweet, I.|09-AUG-06|||May supersede Diamond Creek Formation. Originally Diamond Creek Member of Diljin Hill Formation. The age is constrained only by the 1830 Ma age for parts of the underlying Edith River Group, and by the 1710 Ma age for the overlying West Branch Volcanics. The actual age is likely to be much closer to that of the West Branch Volcanics. In nthn McArthur Basin. Likely to be correlative with Gold Creek Volcanics in sthn McArthur Basin.|Vesicular and amygdaloidal, strongly altered mafic lavas; minor tuff and volcaniclastic sandstone.|basic volcanic rock|sedimentary rock||N||17-JAN-23
Dingo Member|34243|||||Yes|Member, phase|Formal|Variation of published name|Briefly described|Giles Creek Dolostone|67994|||Cambrian||||deposition|Cambrian||||||||No|22651||||||A thin transgressive unit at the base of the Giles Creek Dolomite. Do not confuse with other Dingo units in WA, Victoria and Qld.|Siliciclastic.|siliciclastic sedimentary rock|||N||17-JAN-23
Dinki Di granite|79326|||||Yes|Formation, beds|Informal|Other new published name|Briefly described||||||520|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||||||||No|69444||||||Maidment (2005). An informal name. An unfortunate publication from a PhD thesis. Further use of this name is strongly discouraged unless it is to be formalised with a definition.|A small body of porphyritic garnet-biotite granite. Occurs within a low-strain boudin in migmatitic biotite gneiss and amphibolite of the upper Stanovos Gneiss Member [sic].|acid intrusive rock|||Y||17-JAN-23
Dinkum Orthogneiss|80615|Dinkum Gneiss|80197|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||Molyhil Suite|81819|Statherian|||inferred||Statherian|1793|4|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|71839||||Munson, T. (NTGS)|25-AUG-22|Variably deformed. Variably gneissic to mylonitic.Has a near-identical appearance to the mylonitic parts of the Marshall Granite.|Migmatitic orthogneiss.|high grade metamorphic rock|||Y|I-type|02-JUN-23
Dirty Water Metamorphics|24608|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic|||||Neoarchean|2500|||||800|NT|Yes|39679|41305|B.A.Pietsch|24-AUG-84|Brakel, A.|15-NOV-84|See also misspelling Dirtywater Metamorphics.|Schist, gneiss, banded ironstone, marble.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||17-JAN-23
Dirty Water Metamorphics - magnetite, quartzite|79984|||||Yes|Member, phase|Informal|Variation of published name|Briefly described|Dirty Water Metamorphics|24608|||Paleoproterozoic|||inferred||Neoarchean|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Magnetite, quartzite.|metasedimentary non-carbonate chemical or biochemical rock|metasedimentary siliciclastic rock||U||17-JAN-23
Djabura Formation|5539|||||Yes|Formation, beds|Formal|Other new published name|Described|Arafura Group|522|||Upper Devonian||||deposition|Upper Devonian||||||466||No|42058|||||||Interbedded mudstone, siltstone, sandstone and minor carbonate rocks; diverse fossil fauna including conodonts, ostracods, phosphatic brachiopods, conulariids and fish fossils; palynoflora.|siliciclastic sedimentary rock|||N||17-JAN-23
Djagamara Formation|28261|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ordovician||||deposition|Ordovician|447|||||320|NT|No|30258|45155||||||White to grey sandstone with abundant mudstone pellets, minor glauconitic sandstone and green to dark grey mudstone; rare trace fossils|siliciclastic sedimentary rock|||N||17-JAN-23
Djilbar|39116|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Donnellan, N.|18-SEP-03|||Mount Peake 1:250 000 sheet area.|||||N||17-JAN-23
Dneiper Granite|5548|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Black Label Suite|81822|Statherian|1771|15|isotopic, U/Pb-Pb/Pb ion probe|minimum depositional age|Orosirian||||intrusion|||NT|No|44327|49036|||||Studies by Zhao and Bennett (1995) indicated that Jervois Granite (and Dneiper Granite) were some 100 m.y. younger than Barramundi Association, but Dneiper Granite is intruded by an unnamed biotite granite SHRIMP dated at 1805 +/-4 Ma (Kositcin et al. 2011, p4).|Biotite granite, grading into orthogneiss, grey, locally hornblende-bearing or quartz-deficient.|acid intrusive rock|foliated metamorphic rock||Y||17-JAN-23
Don Creek Sandstone|24248|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Carrara Range Group|3679|||Statherian||||deposition|Statherian|||||||NT|Yes|38237|49018|I.P.Sweet|07-JAN-80||12-MAR-82|Don Limestone noted in Tas.State - separate unit with different age and geog. feature.|Massive, medium to coarse and gritty quartz sandstone; scattered quartz pebbles and thin congomeratic lenses.|siliciclastic sedimentary rock|||N||17-JAN-23
Donnegan Member|5608|||||Yes|Member, phase|Formal|Other new published name|Defined|Lynott Formation|10891|||Statherian||||deposition|Statherian||||||134|NT|No|44287|44287|||||Defined 1964. defn on Tech File E/53-3. Within the Batten Subgroup.|Dolomitic mudstone, fine to coarse grained dolomitic sandstone and lesser sandy dolarenite; thin bedded, cross bedded.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Donydji Group|21680|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1706|10|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1726|6|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation||3000|NT|Yes|71606||Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94||16-MAR-95|Underlying group as Urapunga granite in 00/30118. Formerly Mitchell Range Formation, Cypress Creek Formation.  Min age from Dhupuwamirri Member at top of Fagan Volcanics.The maximum age is poorly constrained by  a Maidjunga Member age from the base of the Fagan Volcanics, in the upper part of the Doydji Group and an inferred age of ~1870 Ma for the underlying Mirarrmina Complex (based on correlation with Bradshaw Complex in eastern Arnhem Bay/western Gove mapsheet areas; Plumb and Roberts, 1992). See also misspellings Donji Group, Donyji Group.|A succession of dominantly fluviatile to shallow-water, coarse-grained, siliciclastic sedimentary rocks with felsic and mafic igneous rocks.|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Dook Creek Formation|5617|||||Yes|Formation, beds|Formal|Other new published name|Defined|Mount Rigg Group|13064|||Calymmian|1589||inferred, geological correlation|deposition|Calymmian|||inferred, geological correlation|||600|NT|No|46679|43010|||||Of Ruker (1959), and Randal (1963) - on KATHERINE  sheet. Some age discrepancies in ref.articles.  Divided into Units 1, 2 and 4 for description purposes. The Jamberline Sandstone Member occurs above Unit 2 and is overlain by Unit 4. Hosts Pb-Zn deposits. Included in Paleoproterozoic - Mesoproterozoic Favenc package.|Dololutite, dolomitic sandstone and siltstone, stromatolitic and oolitic dolostone, chert, quartz sandstone, conglomerate, mudstone, siltstone|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Doom Supersequence|40572|||||Yes|Supergroup|Sequence stratigraphy|Other new published name|Described|||||Calymmian|1575||inferred||Calymmian|1591|10|inferred, geological correlation|||||No|70897||||||Maintains relatively tabular architecture throughout deposition. Max age inferred from dating of detrital zircons in Constance Formation, South Nicholson Group.|Feldspathic siliciclastics, coarsening upward.|siliciclastic sedimentary rock|||N||17-JAN-23
Doomadgee Formation|5619|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Fickling Group|6631|||Statherian|||inferred|deposition|Statherian|1619|5|isotopic, U/Pb-Pb/Pb ion probe||180|400|QLD|Yes|35640|49001|Sweet I.||Staines, H.R.E.|24-JUN-76|Age refined by NABRE project. This unit  in the upper part of the group correlates with Lawn Hill Formation in the upper section of  McNamara Group (Lawn Hill Platform). Both radiometric ages are likely to be from tuff layers in the lower part of the Doomadgee Formation.|Mainly dolarenite and and dolomitic sst grading up into laminated very fine-grained sandstone and siltstone; flaggy, micaceous, fine- to medium-gr. sst and pebble conglom. beds occasionally present.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Dorothy Volcanic Member|5639|Dorothy Volcanics|5640|||Yes|Member, phase|Formal|Variation of published name|Described|Tollis Formation|27070|||Orosirian|1850|||eruption|Orosirian|1863|||||200||No|41586||||||Of the Tollis Formation (formerly of the El Sherana Group, now of the Finniss River Group). See definition for Dorothy Basalt Member.|Basalt, pitchstone;  minor banded chert and dark grey tuff.|basic volcanic rock|||N||17-JAN-23
Double Dam Granite|80199|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||Molyhil Suite|81819|Paleoproterozoic|||||Paleoproterozoic||||||||No|||Reno, B. (NTGS)|06-SEP-17|||to be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Closest town is Alateye, named for Double Dam. Published in geochron report, Kositcin, Beyer, Reno, 2021 (refID 73123) as Double Granite, but this longer name preferred.|Biotite granite: fine- to coarse-grained, porphyritic with zoned K-feldspar phenocrysts, accessory apatite and allanite; moderately to strongly weathered; foliated to gneissic to locally migmatitic|acid intrusive rock|foliated metamorphic rock||Y||17-JAN-23
Douglas Granite|30405|Douglas Leucogranite|5663|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Burnside Suite|31738|Orosirian|1820||inferred|intrusion|Orosirian|1850||inferred||||NT|No|45022||||||Previously mapped as Cullen Granite. Intrudes McMinns Bluff Granite.|Light grey, fine-to medium-grained, porphyritic, felsic biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Driffield Granite|27043|Cullen Granite|4989|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Shoobridge Suite|31733|Orosirian|1820|||intrusion|Orosirian|1825||||||NT|No|39679||Needham, R.S.|13-JUL-83|||Pine Creek Province. Of the Cullen Supersuite. Previously mapped as part of Cullen Granite by Walpole et al 1968. Intrudes Burrell Creek Formation.|Coarse grained pink equigranular to porphyritic biotite leucogranite, medium-coarse grey or pink-green porphyritic hornblende biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Drimmie Head Granite|21695|Drimmie Head type|34100|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Bradshaw Suite|31335|Orosirian|1862|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1873|9|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|44112||Madigan T., Rawlings D., Haines P., Pietsch B.|17-FEB-95|||Of Bradshaw Complex, Arnhem Bay 1:250 000 sheet area. To become part of (reserved) Nhulunbuy Suite.|Medium to coarse grained, cordierite-garnet-bearing, massive to foliated leucogranite; granulite facies metasedimentary and mafic enclaves|acid intrusive rock|||Y|S-type|17-JUL-23
Drummond Formation|38037|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|Carrara Range Group|3679|||Statherian|1660|||deposition|Statherian|1715|30|isotopic, U/Pb||300|600|NT|Yes|62659||Sweet, I.|10-MAR-03|Munson, T.J. after Kruse, P.D. 11-APR-2005|15-MAY-23|Not related to Drummond Group (superseded, QLD) or any other of the Drummond units recorded for Qld. Previously said to be of McNamara Group, now (2023) of Carrara Range Group. Previously said to overlie Surprise Creek Formation, now Boomerang Formation in NT.|Thin polymict conglomerate overlain by thin- to medium-bedded, fine-grained lithic sandstone, laminated siltstone, red beds of brown lithic dolomitic sandstone and chertified dolostone.|siliciclastic sedimentary rock|||N||05-OCT-23
Drummond Formation, Brumby Formation|72394|||||Yes|Formation, beds|Informal|Variation of published name|Described|McNamara Group|11575|||Statherian||||deposition|Statherian||||||||No|||||||Informal grouping of units of the lower McNamara Group to be used for Northern Territory 1:1 million geological map, National Maps Project.|Fine to medium, and lesser coarse grained, quartzose to lithic sandstone; laminated, brecciated and stromatilitic chert; chert clast breccia and conglomerate; laminated siltstone, shale|siliciclastic sedimentary rock|||N||17-JAN-23
Du Faur Suite|42397|||||Yes|Group, Suite|Informal|Resvd name published|Briefly described|||||Paleoproterozoic|1770|||intrusion|Paleoproterozoic||||||||No|61387||Close, D.|13-DEC-04||| Age: >1770Ma.  In the Arunta region.|Dolerite and gabbronorite, metamorphosed to mafic amphibolite; pyroxenite, metamorphosed to amphibolite|basic intrusive rock|metamorphosed basic igneous rock||Y||17-JAN-23
Duckling Granodiorite|83011|||||Yes|Formation, beds|Formal|Reserved|Defined|||Mount Lamb Suite|83008|Orosirian|||inferred||Orosirian|1851.6|7.5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|||Schofield, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Due to lack of available place names, a theme of juvenile animals has been used for the constituents of the Mount Lamb Suite. Type locality: Drill-hole NDIBK01, down-hold depth from 221.15 m to 223.64 m. Drilled at 618060mE and 7835505mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs.|Pinkish-grey, medium- to coarse-grained granodiorite.|acid intrusive rock|||Y||03-FEB-23
Duerdin Group|5760|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Ediacaran|600|||deposition|Cryogenian|650||||500||WA|No|44317|45140|||||Wolfe Basin.|Polymictic conglomerate, siltstone, mudstone, lithic and feldspathic sandstone, quartz sandstone, dolomite, and tillite.|siliciclastic sedimentary rock|||N||21-MAR-23
Dufaur Dolerite|79101|Du Faur Suite|42397|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||||||intrusion|||||||||No|68832||||||Intrudes Lander Rock beds. Place name is Du Faur Hills, so this is a misspelling.|Dolerite.|basic intrusive rock|||Y||17-JAN-23
Duke gabbro|80616|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||Tonian|||inferred||Tonian|831|2.2|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|71795|||||||this sample: Leucocratic phase within gabbroic intrusion.|basic intrusive rock|||Y||17-JAN-23
Dulcie Sandstone|5784|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|||||Frasnian|||inferred|deposition|Pragian|||biozone|||660|NT|No|44964|45052|||||See also Lake Surprise Sst, Lexicon. SF53-6. Revision of usage on Tech File F/53-11 [1967?]. Lower part synonymous with Tomahawk Fm (Joklik 1955), tog. with major portion of former Tomahawk Beds (Smith 1964), excluding uppermost section - Kelly Cr.Fm. Placoderm association occurs in upper part of this unit. Includes similar fauna to Hervey Group, Khan Yunis Formation (1993 ref).|Quartz sandstone, whitish, cross-bedded, medium to thick-bedded. Includes fish fossils.|medium-coarse grained siliciclastic rock||continental rift|N||17-JAN-23
Dungaminnie Formation|5843|Billengarrah Formation|1632|||Yes|Formation, beds|Formal|Other new published name|Defined|Nathan Group|26072|||Calymmian|1575|||deposition|Statherian||||||240|NT|No|32658|45162|||||This unit originally mapped as part of Billengarrah Formation (Smith 1964). Indentified at the base of drillhole Amoco 82/2  (PR1983-0036), but subsequently reinterpreted as Mantungula Formation? in BMR Record 1987-48 (Smith, 2016).|Lower: thinly bedded fine sandstone and siltstone with rare conglomerate lenses. Upper: laminated sandy dolarenite and dololutite; stromatolitic, intraclasts, ooids and ripples.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Durabudboi beds|21715|||||Yes|Formation, beds|Informal|Resvd name published|Defined|||||Calymmian||||deposition|Statherian||||maximum depositional age|||NT|Yes|44112|44112|Haines P.W., Pietsch B.A.|28-FEB-95|Brakel, A.|28-FEB-95|Arnhem Bay - Gove 1:250 000 sheet area. Age uncertain. SHRIMP age is interpreted as maximum depositional age (for this sample), but there is no information on where, stratigraphically within the unit, this sample comes from.|Dolomitic mudstone; minor stromatolitic-evaporitic chert|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Dynamite Creek Member|5886|||||Yes|Member, phase|Formal|Resvd name published|Defined|Eastern Creek Volcanics|5911|||Statherian||||deposition|Paleoproterozoic||||||200|QLD|Yes|38448|38560|G.Derrick, I.H.Wilson|08-MAY-80|||In the Mount Isa area. 1983 definition card gives unit age as Palaeoproterozoic. See UNIT DEFINITION for details on inferring age. The Dynamite Creek Member is probably between approximately 1800 Ma and 1740 Ma old.|Pebbly conglomerate containing acid volcanic and quartzite clasts occurs at the base and as thin lenses; labile sandstone containing acid volcanic and shale fragments and feldspathic sandstone are the other main rock types.|siliciclastic sedimentary rock|||N||17-JAN-23
Eagle Hawk Sandstone|23567|Hudson Formation|8551|||Yes|Formation, beds|Formal|Other new published name|Defined|Elder Subgroup|26535|||Middle Cambrian||||deposition|Middle Cambrian||||||210|WA|No|41840|41840|P.E.Playford|04-MAY-83||||Fine to medium micaceous and feldspathic sandstone; minor siltstone and mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Eaglebeak Amphibolite|75905|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Orosirian||||magmatic crystallisation|Orosirian|1865|24|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation||||No|69917||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|Amphibolite, also described as metagabbro.|metamorphosed basic igneous rock|||N||17-JAN-23
Early Cambrian mafic volcanics 76519|76519|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Early Cambrian|510|||eruption|Early Cambrian|545|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly basaltic rocks; may include minor ultramafic volcanics|basic volcanic rock|||N||17-JAN-23
Early Paleozoic sedimentary rocks 76698|76698|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Lopingian|251|||deposition|Terreneuvian||||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset. [Note: Name of unit does not match age range given - whole of Paleozoic, CEB Feb-2012]|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Eastern Creek Volcanics|5911|||||Yes|Formation, beds|Formal|Other new published name|Defined|Haslingden Group|8130|||Statherian|1710|25||eruption|Statherian|1779|4||||8000|QLD|No|39798|44755|||||Age refined by NABRE project.  Partly in the Lawn Hill Subprovince. Series of Cu-rich tholeiitic basalts, erupted into a continental rift now expressed as the Leichhardt River Fault, forming the Western Fold Belt.  Adjacent to Mt Isa Cu deposit. Upper section is Pickwick Member, lower part is Cromwell Member, separated by Lena Quartzite. Age: 1.8Ga. Intruded by Sybella Batholith. Basis of Max age to be determined.|Metabasalt, amygdaloidal basalt, quartzite, tuff, pelitic schist.|metamorphosed basic igneous rock|metasedimentary siliciclastic rock||N||17-JAN-23
Echo Sandstone|33173|Masterton Formation""|11439|||Yes|Formation, beds|Formal|Resvd name published|Defined|Tawallah Group|17902|||Statherian|1710||inferred, overlying unit|deposition|Statherian|1725||inferred, underlying unit|||160|NT|No|22538|22538|Rawlings D.|17-NOV-98|||Pungalina Member included in [lateral equivalent] Warramana Formation (Rawlings et al, 2004, p7), but subsequently returned to Echo Sandstone. Occurs on Wearyan Shelf.|Thin basal cobble conglomerate; lower dolomitic-lithic sandstone with local pebbles, overlain by interbedded lithic sandstone and mudstone; upper pink coarse +/- pebbly lithic sandstone with large planar and trough cross-beds.|siliciclastic sedimentary rock|||N||17-JAN-23
Echuca Shoals Formation|5943|||||Yes|Formation, beds|Formal|Other new published name|Described|Bathurst Island Group|1249|||Aptian|114|||deposition|Valanginian|133|||||||No|42053||||||See also Echuca Shoals (abbreviated version). Includes hydrocarbon source rocks.|Predominantly an extensive claystone; organic-rich, oil-prone marine shale.|fine grained siliciclastic rock|organic rich sedimentary rock||N||17-JAN-23
Edith River Group|5978|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Orosirian|1825|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1870|||||1500|NT|Yes|9534||Stuart-Smith P.G.|25-JAN-83|Brakel, A.|25-OCT-83|See also Lexicon. Placed in McArthur Basin in RefID 22479, Ahmad 1998), 'Geology and mineral deposits of the Pine Creek Inlier and McArthur basin, Northern Territory'. Intruded by the Grace Creek Granite. Min age was shown shown as 1650 Ma from ~1983 definition, but none of refs give this age. Min age from Plum Tree Creek Volcanics at top of group.|Rhyolite, quartz rhyolite, dacite, minor mafic volcanics; lenses of ignimbrite and tuffaceous sandstone; finely laminated tuffaceous siltstone.|igneous volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Edmirringee Volcanics|26302|Edmirringee volcanics|5988|||Yes|Formation, beds|Formal|Variation of published name|Defined|Ooradidgee Group|39122|||Orosirian|1814||inferred, overlying unit|eruption|Orosirian|1870||inferred, underlying unit||850|2500|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|07-OCT-81|Brakel, A.|16-FEB-84|See also Edmirringee Basalt. Davenport Project.  Interfingers with Epenarra Volcanics.|Basalt, hawaiite, potassic trachybasalt and shoshonite, predominantly massive/vesicular/amygdaloidal, non-porphyritic pahoehoe and minor amygdaloidal probable aa lava; minor felsic lava and tuff; local thick rhyolite lava; sandstone.|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Ehrenberg Granite|42370|||||Yes|Formation, beds|Formal|Resvd name published|Described|||Illili Suite|41845|Statherian||||intrusion|Statherian||||||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15).Yaya Domain, Warumpi Province.|Foliated equigranular to porphyritic allanite-bearing biotite granite; locally migmatic.|acid intrusive rock|||Y||17-JAN-23
El Sherana Group|24261|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Orosirian|1822||isotopic, U/Pb-Pb/Pb ion probe||Orosirian||||||2500|NT|Yes|39357||Needham, R.S.|24-MAR-82|Brakel, A.|13-JUL-83|See also "El Sherana Group". Previous minimum age shown was 1730 Ma. Unclear where  this came from. [CEB Oct2011]. Age also given as 1870-1860Ma. Recent ages (post-2000) are ~1828-1830Ma, which matches age names shown. See also El Sherana Suite. Constituent unit Pul Pul Rhyolite has been dated. Max age from underlying Zamu Dolerite.|Rhyolite, greywacke, siltstone, sandstone, basalt.|igneous volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Elang Formation|34215|||||Yes|Formation, beds|Formal|Other new published name|Described|Flamingo Group|6726|||Oxfordian||||deposition|Callovian||||||150||No|5952|||||||Quartzose, very fine- to fine-grained, moderately well-sorted sandstones with interbedded siltstone and claystone.|siliciclastic sedimentary rock|||N||17-JAN-23
Elcho Island Formation|26534|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Wessel Group|27928|||Neoproterozoic|||inferred|deposition|Neoproterozoic|790||isotopic, Rb/Sr|||700|NT|Yes|44338|44112|Haines P.(after Dunnet, 1965; Plumb & Roberts 1992)||Brakel, A.|01-FEB-95|Redefinition on card. Age probably Neoproterozoic. Hosts the Elcho Island surficial Fe deposit.|Fine to coarse grained, thin to medium bedded sandstone, commonly calcareous or dolomitic, locally glauconitic; minor mudstone interbeds; carbonate horizons, strongly leached or silicified; chert breccia|siliciclastic sedimentary rock|||N||17-JAN-23
Elder Subgroup|26535|Elder Sandstone|6040|||Yes|Subgroup|Formal|Unknown or process pending|Described|Goose Hole Group|23629|||Late Cambrian|||||Middle Cambrian||||||370||No|41840||||||Of the Goose Hole Group. Includes: Eagle Hawk Sandstone, Overland Sandstone.|Feldspathic sandstone; minor siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Elizabeth Formation|84108|Elizabeth Sandstone|80378|||Yes|Formation, beds|Formal|Variation of published name|Defined|Accident Subgroup|37738|||Ectasian|||||Calymmian|1586|7|||167|200|QLD|Yes|||||Munson, T. (NTGS)|01-JUN-23|Previously Elizabeth Sandstone. Reason for name change unclear.|The formation consists of thick-bedded, large-scale trough cross-bedded, coarse- to very coarse and granule-rich sandstone. The upper part of the formation is marginally more fine-grained and better sorted, with medium-scale cross-beds + flat beds.||||N||05-OCT-23
Elkedra Granite|25892|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Devils Suite|30736|Statherian|1640||isotopic, Rb/Sr|intrusion|Statherian|1720|6|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|46919|49033|Blake D.H.||Brakel, A.|17-FEB-84|Tennant Creek / Davenport Province. Intrudes the Rooneys Formation (Ooradidgee Subgroup, Hatches Creek Group).|Pale pink, medium to coarse, even-grained to slightly megacrystic, homogeneous leucogranite; minor medium-grained tourmaline granite, greisen, aplite, quartz+feldspar+/-tourmaline pegmatite, and quartz-tourmaline veins.|acid intrusive rock|||Y||17-JAN-23
Elkera Formation|6073|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mopunga Group|12305|||Ediacaran|544||inferred, biostratigraphic correlation|deposition|Ediacaran|600||inferred, underlying unit||70|270|NT|Yes|48990|48990|M.R.Walter|31-JAN-79|Passmore, V.L.|26-MAY-80|Formerly of the Grant Bluff Formation but excluded with revision of the unit (Walter 1980).  Age: Ediacaran.|A succession of interbedded siltstone, quartz sandstone to sublithic sandstone, and shale; capped by dolostone (locally with columnar stromatolites) which is locally evaporitic. Locally includes a silty sandstone and a granule orthoquartzite bed.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Ella Creek Member|24266|||||Yes|Member, phase|Formal|Resvd name published|Defined|Koolpin Formation|25130|||Orosirian|1863||inferred, geological correlation|deposition|Orosirian|2025||inferred, geological correlation|||150|NT|Yes|60575||I.Crick|09-FEB-82|Brakel, A., Abell, R.|31-MAY-82|Within the South Alligator Group. 1982 Definition says: "Part of sedimentary sequence unconformably overlying granitic complexes having a minimum date of 2400 Ma (Page, 1980) and intruded by granites dated at c. 1750 Ma (Walpole et al., 1968)." 2005 Pine Creek Orogen interp. (RefID 64698) gives age range of 1863- 2025Ma .|Massive to rubbly goethitic ironstone commonly containing paraquartzite; breccia, quartz flake breccia, ferruginous chert breccia, oolites, siltstone containing chert nodules, pebble and boulder conglomerate.|non-carbonate chemical or biochemical sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Ellery Granitic Complex|29773|Ellery Creek Granitic Gneiss|21741|||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|Madderns Yard Suite|33044|Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|22-MAY-91|||Arunta Block. Defn cf State Conv. 2-Oct-91. Not related to Ellery Adamellite, Vic. Geographic part of name wrongly abbreviated. Also stated to be of the Iwupataka Metamorphic Complex?|Metacrystic granitic gneiss; leucogranitic augen gneiss; granitic gneiss|foliated metamorphic rock|metamorphosed acid igneous rock||Y||17-JAN-23
Elliott sandstone member|79767|Elliot Sandstone|70552|||Yes|Member, phase|Informal|Variation of published name|Described|Kyalla Formation|30268|||Mesoproterozoic||||deposition|Mesoproterozoic|||||||NT|No|70968||||||Gorter and Grey (2012). Beetaloo Sub-basin. Informal name for a prominent sandstone-rich interval in the lower part of the Kyalla Formation.|Beds and bedsets, in varying proportions, of thinly to medium bedded, fine- to coarse-grained quartz sandstone, with minor interbedded mudrocks. Beds are massive, laminated and cross-bedded and may have scoured bases.|siliciclastic sedimentary rock|||N||17-JAN-23
Ellis Sandstone|6108|Ellis Formation|28531|||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Early Cambrian|530||inferred|deposition|Ediacaran|580||inferred|||500||No|48842|48842|||||Not to be confused with Ellis Formation in the Antarctic. Interfingers with Sir Frederick Conglomerate.|White to pale brown, cross-bedded, medium-grained quartz sandstone and pebbly sandstone; may be kaolinitic; minor interbedded calcareous sandstone and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Elyuah Formation|6118|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Mopunga Group|12305|||Ediacaran||||deposition|Ediacaran|||inferred, underlying unit||17|108|NT|Yes|44327|48990|Walter M.R.||Passmore, V.L.|26-MAY-80|Brown and green shale, basal pebbly conglomerate. Overlies Arunta Block units.|Green, red and grey micaceous mudstone, siltstone; thin basal sandstone or pebbly arkose.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Emily Gap Schist|6134|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Hayes Metamorphic Complex|27290|||Paleoproterozoic|||||Paleoproterozoic||||||||No|41664||||||No recent pubs. for this?|Biotite and biotite-muscovite schist, micaceous quartz metasandstone, rare amphibolite|metasedimentary siliciclastic rock|||N||17-JAN-23
Emmerugga Dolostone|76085|Emmerugga Dolomite|27398|||Yes|Formation, beds|Formal|Variation of published name|Described|Umbolooga Subgroup|18813|||Statherian|||||Statherian|||||||NT|No|63112||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). See Jackson et al (1987) p86-93 for definition of Emmerugga Dolomite.|Massive, dark grey, karstic-weathering, crystalline dololutite; Dololutite, stromatolitic dololutite, dolomitic siltstone, dolarenite and dolomitic breccia; stromatolites; common halite casts and quartz nodules after evaporites.|carbonate sedimentary rock|||N||17-JAN-23
Enbra Granulite|24269|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Strangways Metamorphic Complex|17395|||Paleoproterozoic|1685|11|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Orosirian|1812|2|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|9199|48992|Langworthy, A.P.|21-FEB-79|Branch, C., Brown, M.|01-MAR-79|Geological Province: Arunta Block (Division 1). Of the Strangways Metamorphic Complex. Mafic intrusion. Protolith age of 1810.7 +/- 2.6 Ma, 1811+/-3Ma . Metamorphosed 1685 +/- 11 Ma.|Homogeneous mafic granulite with more evolved plagioclase-rich and anorthositic rocks in the N; lesser irregular felsic granulite, garnet-biotite-feldspar-quartz paragneiss and migmatitic paragneiss bodies.|high grade metamorphic rock|||N||17-JAN-23
Endurance Sandstone Member|29220|||||Yes|Member, phase|Formal|Resvd name published|Defined|Kurinelli Sandstone|24347|||Orosirian|1810||inferred, lithostratigraphic correlation|deposition|Orosirian|1870||inferred, lithostratigraphic correlation||||NT|Yes|39900|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-DEC-84|Davenport Project. Within the Ooradigee Subgroup. See also the informal Endurance sandstone member.|Micaceous greywacke and siltstone, thin bedded; minor feldspathic arenite.|siliciclastic sedimentary rock|||N||17-JAN-23
Enga Sandstone|6185|Enga Formation|6184|||Yes|Formation, beds|Formal|Variation of published name|Defined|Langfield Group|10161|||Tournaisian||||deposition|Tournaisian||||||160|WA|No|44965|41864|||||See also Lexicon. Max. thickness: <150m. Formerly called "Snowie Sandstone"|Well sorted, medium-grained quartz sandstone, calcareous in part, siltstone, shale, quartzic limestone; fossiliferous.|siliciclastic sedimentary rock|||N||17-JAN-23
Eninta Sandstone|6192|||||Yes|Formation, beds|Formal|Unknown or process pending|Described|Pertaoorrta Group|15091|||Early Cambrian||||deposition|Neoproterozoic|||||||NT|No|48863||||||Although included in Arumbera Sandstone [NTGS&AGSO Hermannsburg Explan Notes 1995 and NTGS Special Publication 5 (2013)], this name continues to be used by NTGS in 2018, 2019. See also Eninta Formation. Maximum depositional age: 1030 +/- 9 Ma.|Sandstone with minor siltstone and conglomerate. Generally thin-bedded, cross-bedded, micaceous, feldspathic and immature. Local beds of conglomerate, with clasts predominantly of chert and carbonate rocks.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Ennugan Mountains Granite|6195|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1618|2|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1622|7|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|42326||||Whelan, J., Normington, V.|08-MAR-17|See also Ennugan Granite. Intrudes Lander Rock beds. PROPOSED PUBLICATION for definition: Beyer EE, 2017. Nature and prospectivity of high-heat-producing granites of the central Aileron Province, Northern Territory. Northern Territory Geological Survey, Record 2017-0xx.|Includes a homogeneous and massive porphyritic grey biotite granite and a separate phase of porphyritic granite with elongate K-feldspar megacrysts. Local variations contain hornblende and allanite, or have rapakivi texture.|acid intrusive rock|metamorphosed acid igneous rock||Y|I-type|17-JAN-23
Entia Gneiss Complex|6207|Entia gneiss complex|24956|||Yes|Group, Suite|Formal|Variation of published name|Described|||Entia Suite|6211|Statherian|1739|12|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|Statherian|1773|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|41242||||||Includes the Entia Gneiss as a constituent unit. Used informally as "Entia Gneiss Complex" in (Beyer et al 2013) RefID 69917, suggesting that this name may no longer be current? May have previously included rocks now divided into Entia Metamorphics, Valley Metamorphics and Ambulbinya Supersuite?|Dominantly orthogneiss, ranging from ultramafic to granitic in composition, intruding a volumetrically minor supracrustal sequence of calc-silicate, quartzite, aluminous metapelite and amphibolite.|foliated metamorphic rock|metasedimentary rock||Y|I-type|17-JAN-23
Entia Metamorphics|79088|Entia Gneiss|6208|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Statherian|1717|10||metamorphism|Statherian|1788|3||maximum depositional age||||No|69917||||||Eastern Arunta Region, Aileron Province. U/Pb SHRIMP, LA-ICPMS zircon dating, Hf analytical data. 7 samples. Maximum depositional age for the sedimentary protolith of 1788+/-3 Ma; metamorphic zircon growth 1717+/-10 Ma. Intermediate ages given from other samples. Does this replace Entia Gneiss or Entia Gneiss Complex in whole or in part?|Metapelite interlayered with quartzo-feldspathic gneiss, layered amphibolite and epidotised gneiss. Samples: Kyanite-garnet-biotite-muscovite schist; Migmatitic garnet-bearing metapelite.|metasedimentary siliciclastic rock|foliated metamorphic rock||N||17-JAN-23
Entire Gneiss|79068|Entire Anorthosite|6214|||Yes|Formation, beds|Formal|Variation of published name|Described|Harts Range Metamorphic Complex|36822|||Ordovician|453|2|isotopic, U/Pb-Pb/Pb ICP-MS|metamorphism|Neoproterozoic|||inferred|magmatic crystallisation||||No|69917||||||Published in Beyer et al. (2012), RefID 69917. Eastern Arunta Region - Irindina Province.  U/Pb LA-ICPMS zircon dating, Hf analytical data. Two oldest grains may represent primary igneous zircon (timing of magmatism) at 596 and 523 Ma. The mean age of the majority: 453+/-2 Ma represents matamorphic recrystallisation.|Meta-anorthositic gneiss.|foliated metamorphic rock|||Y||17-JAN-23
Epenarra Volcanics|27287|Epenarra volcanics|6220|||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1837|5|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1840|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||3000|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project. Tennant Creek/ Davenport Province. Tennant Creek Suite. Within Hatches Creek Group.|Felsic lava and pyroclastic rocks including ignimbrite and lapilli tuff; chert; volcaniclastic arenite, quartz arenite, conglomerate; minor altered mafic lava.|acid volcanic rock|||N||27-APR-23
Erica Sandstone|6229|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Redcliff Pound Group|15983|||Cambrian|||inferred|deposition|Ediacaran|||inferred||400|700|WA|Yes|29809|45140|Blake D.H.|15-MAR-73|||For recent update see: Haines, P.W., Allen, H.J. 2016. The Murraba Basin: another piece of the Centralian Superbasin jigsaw puzzle falls into place IN GSWA 2016 extended abstracts: promoting the prospectivity of Western Australia: Geological Survey of Western Australia, Record 2016/2, p. 31-35.|Shallow marine, well sorted, mainly fine to medium grained, sublithic and minor quartz sandstone, siltstone, shale and glauconitic sandstone; cross bedded, ripples; minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Ernie Lagoon Member|27150|||||Yes|Member, phase|Formal|Other new published name|Defined|Ranford Formation|15830|||Cryogenian||||deposition|Cryogenian||||||10|NT|No|32699|48938|||||Within the Duerdin Group.|Quartz sandstone, conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Erontonga Metamorphics|6241|Erontonga metamorphics|24270|||Yes|Formation, beds|Formal|Variation of published name|Described|Strangways Metamorphic Complex|17395|||Statherian|1764.8|4|||Orosirian|1809.8|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|39470||||||For definition see Erontonga metamorphics.|Layered felsic granulite and cordierite felsic granulite, some mafic granulite; amphibolite; rare calc-silicate and magnesian rocks|high grade metamorphic rock|||N||17-JAN-23
Erringkarri Rhyolite|21753|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Bustard Subgroup|21402|||Orosirian|1815||inferred, overlying unit|eruption|Orosirian|1820||inferred|||20|NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Part of the Bickerton Suite.|Rhyolite, dark red, variably porphyritic (K-feldspar).|acid volcanic rock|||N||17-JAN-23
Errolola Sandstone|26303|Errolola sandstone|24959|||Yes|Formation, beds|Formal|Resvd name published|Defined|Hanlon Subgroup|24304|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Orosirian|1820||inferred, lithostratigraphic correlation|maximum depositional age|200|800|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project. Within the Hatches Creek Group. See also misspelling Erorolla Sandstone.|Feldspathic sublithic arenite, quartz arenite; minor conglomerate.|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Esperanza Formation|6282|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|McNamara Group|11575|||Statherian|||inferred, overlying unit|deposition|Statherian|1668|||||400|QLD|Yes|36227|37459|R.J.Cavaney|29-JAN-76|||Age refined by NABRE project. Geochronology (1657+/-3 Ma) based on a "pinkite": tuffaceous rock or peperite in the lower part of this formation. Host to sulphide mineralization in siliceous and calcareous rocks. Equivalent to the Gun 2.1 to 2.5 sequences.|Stromatolitic chert, dolomitic sandstone, siltstone, oolitic dolostone. Upper section includes accretions of deeper water 'organ pipe' digitate stromatolite bioherms and biostromes.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Esther Granite|70576|Esther|35620|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Mollie Granite Complex|73523|Statherian|1789|6|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|||||||NT|Yes|61246||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||See UNIT DEFINITION. Intrudes Lander Rock Formation|Biotite granite, orientated tabular k-feldspar phenocrysts and tourmaline-bearing; also equigranular/seriate porphyritic textural variant; locally mylonitic tonalite|acid intrusive rock|||Y||17-JAN-23
Etadunna Formation|6287|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Miocene|12.5|||deposition|Chattian|25.7||isotopic, Rb/Sr|||80|SA|No|44829||||||25-80m thick, contains abundant fossils.|Sandy claystone and sand with silty and gypseous clay and flaggy dolomite below bedded sandstone; overlain by  sand, silt and clay, cross-bedding throughout, and local intercalated dolomite nodules and beds.|carbonate sedimentary rock|||N||17-JAN-23
Ethabuka Sandstone|25899|Cravens Peak Beds|4858|||Yes|Formation, beds|Formal|Variation of published name|Defined|Toko Group|18263|||Hirnantian||||deposition|Katian|||inferred, underlying unit|||1147|QLD|Yes|10116|36580|Draper J.J.||Whitaker, W.|09-AUG-79|Subdivision of Cravens Peak Beds in the broad sense, not Cravens Peak Beds (sensu stricto).|Quartzose and quartzofeldspathic sandstone, minor siltstone and claystone interbeds, rare conglomerate.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Ethel Creek Granite|21755|||||Yes|Formation, beds|Formal|Resvd name published|Fully described|||Southwark Suite|40018|Mesoproterozoic|1567||inferred, geological correlation|intrusion|Mesoproterozoic|1570||inferred, geological correlation|||||No|43631||Blake D.|18-MAY-92|||Mount Doreen 1:250 000 sheet.  Of the Arunta Complex.  Intrudes Lander Rock beds. Age range from Southwark Suite.|Sparsely megacrystic muscovite-biotite granite|acid intrusive rock|||Y||17-JAN-23
Etingambra Formation|6312|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Lutetian|45|||deposition|Lutetian|51|||||12||No|48890|48890||||||Sandstone, conglomeratic sandstone, conglomerate, some siltstone|siliciclastic sedimentary rock|||N||17-JAN-23
Eulo Queen Group|6356|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Upper Jurassic||||deposition|Middle Jurassic||||||60|QLD|No|33183|33183|||||See variations Eulo-Queen Group.|Quartzose sandstone, conglomerate, silstone, and shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Eurobra Gneiss|82060|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Neoproterozoic|||inferred||Stenian|1019|23|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|||A. Weisheit (NTGS)|19-OCT-20|Munson, T. (NTGS)|25-AUG-22|Geographical name = Eurobra Hill. Map sheet is Jinka 1:100 000 sheet 6052. Nearest town is Harts Range. This unit is a migmatitic paragneiss in the Irindina Province. To be published in Jinka explanatory notes: Reno BL, Weisheit A, Beyer EE and PG Farias, 20XX. Jinka, Northern Territory. 1:100 000 geological map series explanatory notes, 6052. Northern Territory Geological Survey, Darwin.|Comprises abundant metagreywacke migmatites. Migmatitic paragneiss.|foliated metamorphic rock|||U||02-JUN-23
Eurowie Sandstone Member|28237|||||Yes|Member, phase|Formal|Variation of published name|Defined|Arrinthrunga Formation|632|||Furongian|||inferred, isotopic correlation|deposition|Furongian|||inferred, isotopic correlation|||107||No|44327|48844||||||Quartz sandstone, quartzic dolostone interbeds with distinctive halite hopper casts; minor shale, siltstone.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Eva Springs Member|31357|Eva Spring Sandstone Member|21761|||Yes|Member, phase|Formal|Resvd name published|Fully described|Vaughan Springs Quartzite|19064|||Cryogenian||||deposition|Cryogenian||||||900||No|44158||Blake D.|18-MAY-92|||Mount Doreen 1:250 000 sheet|Medium- to thickly-bedded quartz sandstone; has abundant cross-beds and some ripple marks.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Eva Valley Granite|6401|||||Yes|Formation, beds|Formal|Other new published name|Described|||Jim Jim Suite|30779|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|39679||||||Pine Creek Province. Intrudes Grace Creek Granite.|Fine grained biotite leucogranite, fine to coarse grained biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Ewen Granite|6432|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||Kalkadoon Supersuite|30638|Orosirian|1856|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1859|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|39798|44989||||||Medium pink leucogranite, pink to grey coarse porphyritic granite and granodiorite microgranite, pegmatite, schist, mylonite; some phases possibly coeval with Kalkadoon Granite.|acid intrusive rock|||Y||17-JAN-23
Eyre Formation|6451|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Lutetian|42||biozone|deposition|Danian|62||biozone|||120|SA|No|24176|33938|||||See also Winton Formation. See Strzelecki 1:250k explan notes (1995) for location of type section. Geological Province: Callabonna Subbasin/ Lake Eyre Basin.  Overprinted by the "Cordillo Silcrete". See also Lake Eyre Formation. Dominantly a braided stream and floodplain deposit. Palynology age range. Rare leaf fossils in silt or clay layers; variably lignitic near base (+/- pyrite). Reddish horizons and silcrete mark paleosols.|Variably silcrete-altered quartzose sandstone, minor pebbly sandstone and conglomerate; ubiquitous glossy quartz pebbles. Pyritic, carbonaceous sand,  range from silt to small cobble, with bands of lignite and clay: montmorillonite, kaolinite, illite.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Fagan Supersuite|31308|||||Yes|Supergroup|Informal|STRATLEX Entry|Briefly described|||||Paleoproterozoic|1710||||Paleoproterozoic|1715|||||||No|50591||||||Geochemical parent of Fagan Volcanics, Gadabara Volcanics, Latram Granite, Yanungbi Volcanics, Cato Volcanics. See also Fagan Suite.|||||Y||17-JAN-23
Fagan Volcanics|24971|||||Yes|Formation, beds|Formal|Other new published name|Defined|Donydji Group|21680|Fagan Supersuite|31308|Statherian|1706|10|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1707|12|isotopic, U/Pb-Pb/Pb ion probe|||600|NT|No|44299|43010|||||Constituent Members: Maidjunga Member, Sheridan Member. Age previously considered to be Orosirian. Geochemical parent group - Fagan Supersuite.|Porphyritic, massive to flow banded rhyolite; volcaniclastic mudstone, sandstone, breccia; fine grained to conglomeratic cross-bedded sandstone. Also mafic volcanics.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Fairy Glen Sandstone Member|34086|||||Yes|Member, phase|Formal|Other new published name|Defined|Badalngarrmirri Formation|26360|||Statherian||||deposition|Statherian||||||100|NT|Yes|44112|24048|Sweet, I.|18-SEP-06|||Within the Parsons Range Group.|Sandstone: thick-bedded, fine to medium-grained, porous, highly ferruginous (glauconitic), hummocky and swaley cross-stratification; minor trough cross-bedded sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Fanny Rhyolite Member|30419|||||Yes|Member, phase|Formal|Other new published name|Described|Plum Tree Creek Volcanics|15334|||Orosirian||||eruption|Orosirian|1825|||||500||No|9538||||||Within the Edith River Group.|Massive or layered white to purple-brown massive rhyolite and welded felsic tuff.|acid volcanic rock|||N||17-JAN-23
Fargoo Tillite|25905|||||Yes|Formation, beds|Formal|Other new published name|Defined|Duerdin Group|5760|||Ediacaran||||deposition|Cryogenian||||||100|WA|No|44317|45047|||||Defn on Tech File SE/52-6.   Correlated with Olympic Formation. Possibly equivalent to [other?] diamictite of the Duerdin Group. See also Fargoo Formation. Wolfe Basin.|Diamictite, tillite, locally abundant dolostone clasts, dolostone, dolomite, conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Farquharson Sandstone|27154|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian|1636|4|inferred, overlying unit|minimum depositional age|Statherian|1635|19|inferred, underlying unit|maximum depositional age||111|NT|No|28255|48943|||||Age probably based on dating of tuffite in underlying Kunja Siltstone at  1635 +/- 19Ma, and dating of tuffite in overlying Blue Hole Formation at 1636 +/-4 Ma. Birindudu Basin. SHRIMP maximum depositional age 1654 +/- 12 Ma  (Kositcin et al., 2017).|Micaceous sublitharenite, quartz sandstone, siltstone, mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Favenc package|81658|||||Yes|Supergroup|Informal|Sequence strat published|Briefly described|||||Calymmian|||||Statherian||||||||No|72373||||||Includes Nathan Group, Mount Rigg Group, upper Balma Group.|||||N||17-JAN-23
Fenelon Formation|6577|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Bathurst Island Group|1249|||Campanian|77|||deposition|Campanian|82|||||||No|42053|||||||Calcareous claystone, marl. Some medium grained sandstone in Caswell sub-.basin|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Fengshan Formation|6582|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|42058||||||Is this in Australia?|||||N||17-JAN-23
Fenn Gap Conglomerate Member|6584|||||Yes|Member, phase|Formal|Other new published name|Defined|Heavitree Formation|8223|||Neoproterozoic||||deposition|Neoproterozoic|||||||NT|Yes|35102|48992|Clarke D.B., Shaw R.D.|01-JAN-70|Branch, C.T.|01-DEC-79|See also Fenn Gap Conglomerate (probably an abbreviated version).|Medium to thick-bedded, poorly sorted, argillaceous granule conglomerate and conglomeratic sandstone, which are commonly iron stained brown, pink, and purple, particularly near the base.|siliciclastic sedimentary rock|||N||17-JAN-23
Fenton Granite|24275|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Tennysons Suite|31732|Orosirian|1765|90|isotopic, K/Ar|intrusion|Orosirian|1835||isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|1430|42012|Whitehead B.R.|06-JAN-89|Kruse, P.D.|15-DEC-88|Definition card to published name. Pine Creek Province. Part of the Cullen Supersuite. Intrudes the Mount Partridge and South Alligator Groups.|Light grey to pink, medium- to coarse-grained, porphyritic biotite-hornblende granite, sheared in places, partly foliated.|acid intrusive rock|||Y||17-JAN-23
Ferdies Member|72402|||||Yes|Member, phase|Formal|Resvd name published|Defined|Dead Bullock Formation|35396|||Orosirian|1840|6.4|inferred, overlying unit|deposition|Orosirian|2109|10|inferred, isotopic correlation||||NT|Yes|62628||||||Reserved as Ferdies (Bore) Member (Crispe, 2004). Depositional age poorly constrained by dating of detrital zircons in Ferdies Member and crystallisation age of tuff in overlying Callie Member . Preferred model for deposition between ~1.86 and 1.84 Ga (Cross and Crispe, 2007). Within the Tanami Group. Top of Ferdies Member is defined as the top of the uppermost sandstone unit within Dead Bullock Formation.|Feldspathic sandstone and conglomerate, quartz sandstone, minor siltstone, minor chert.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Fickling Group|6631|Fickling Beds|6629|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Statherian|1613|5|isotopic, U/Pb|deposition|Statherian|1640|7||||800|NT|Yes|30914|49001|Sweet, I.||Staines, H.R.E.|21-APR-78|Fish River Formation has been added into redefinition in 1978. This Murphy Inlier group correlates with the McNamara Group in the Lawn Hill Platform region. Hosts the Walford Pb-Zn-Ag deposit.|Dolostone, dolomitic siltstone, sandstone, shale, carbonaceous shale.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Fiddlers Lake granite|74920|||||Yes|Formation, beds|Informal|Variation of reserved name|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|63261||||||Geological Province: Tanami region. Reserved as Fiddlers Lake Metamorphics (Crispe 2006). See also single use of Fiddlers Lake Granite, which simply modifies the figure published twice in 2007.|Granite.|acid intrusive rock|||Y||17-JAN-23
Fiery Creek Volcanics|6639|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Fiery Suite|38573|Statherian|1678|3|isotopic, U/Pb-Pb/Pb ion probe|eruption|Statherian|1709|3|isotopic, U/Pb-Pb/Pb ion probe|eruption||750|QLD|Yes|36548|37459|R.J.Cavaney|29-JAN-76|Whitaker, W.|24-JUL-81|Not same unit as Fiery Creek Granite of Victoria. Mount Isa Province. Age refined by NABRE project.  Age of unit: 1708+/-2 Ma. Within the Fiery Supersuite.  Age 1701+/-23 Ma, from Geology of Queensland 2013, p56. High-permeability aquifer. See also mis-spelt Ferry Creek Volcanics. Part of the Big Supersequence.|Rhyolite, agglomerate, amygdaloidal/vesicular altered basalt, sandstone, conglomerate, siltstone.|acid volcanic rock|basic volcanic rock||N||17-JAN-23
Fingerpost Granodiorite|23593|Cullen Granite|4989|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Fingerpost Suite|31737|Paleoproterozoic|1823|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Paleoproterozoic|1843|22|isotopic, U/Pb-Pb/Pb, TIMS||||NT|No|39679||Needham, R.S.|13-JUL-83|||Cullen Batholith - previously mapped as part of Cullen Granite until after 1968. Pine Creek Province. Intruded by Foelsche Leucogranite.Intrudes Finniss River Group.|Light pink, medium- to coarse-grained biotite-hornblende granodiorite, porphyritic to equigranular.|acid intrusive rock|||Y|I-type|17-JAN-23
Fingerpost Suite|31737|||||Yes|Group, Suite|Formal|STRATLEX Entry|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|1800||||Paleoproterozoic|1840|||||||No|64698||||||Cullen Batholith. Pine Creek Province.|Hornblende-dominated granites.||||Y||17-JAN-23
Finke Group|6661|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Frasnian|||||Givetian||||||1000||No|48865|48865|||||Not related to Finke Beds.|Fine to medium quartz sandstone., minor siltstone and shale, pebble and boulder conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Finniss River Group|6669|||||Yes|Group, Suite|Formal|Other new published name|Defined|Cosmo Supergroup|72987|||Orosirian|1820||inferred, intrusive relationship||Orosirian|1870|||||5000|NT|No|22574|44314|||||Defined by Randal, 1962a - see card file. See also Lexicon. See also misspelt Finnis River Group. Probably now includes Fisher Creek Siltstone, formerly of South Alligator Gp. Min age from intrusion of Ti-Tree Granophyre into Chilling Sandstone. Date from constituent Warrs Volcanic Member (Burrell Creek Formation).|Siltstone, greywacke, sandstone, felsic to mafic lavas, pyroclastics.|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Fish Billabong Adamellite|6679|Fish Billabong Granite|23594|||Yes|Formation, beds|Formal|Other new published name|Defined|||Allia Creek Suite|39136|Orosirian|1820|||intrusion|Orosirian|1850|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|22809||Fahey G.M., Fahey J.E. (submitted by G.M. Fahey)|18-APR-83|Brakel, A.|08-JAN-85|Pine Creek Province. Intrudes Hermit Creek Metamorphics, Wangi Basics.|Varies from fine-through medium- to coarse-grained biotite-quartz monzonite, with poikilitic texture and minor myrmekite. Some aplite. Mineralogy: quartz, plagioclase, alkali feldspar and biotite; some quartz-adularia veins and rare fluorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Fish Hole Formation|84109|Playford Sandstone|37727|||Yes|Formation, beds|Formal|Other new published name|Fully described|McNamara Group|11575|||Statherian|||||Statherian|1715|30||||1450|NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|Outcrop previously included in Playford Sandstone. Geochronology has shown the need to distinguish rocks north of the Mitchiebo-Maloney Fault as a distinct unit, likely older than Playford Formation south of the fault.|Thick beds, med-coarse-grained cross-bedded sandstone, w current ripples, lineations, mudstone intraclasts, pebbly layer; overlain by shale w interbedded siltstone, very fine-grained lithic sandstone. Thick beds lithic sandstone, some granules, pebbles.||||N||06-OCT-23
Fish River Formation|6682|||||Yes|Formation, beds|Formal|Other new published name|Defined|Fickling Group|6631|||Statherian|1653|||deposition|Statherian|1770|||||250|QLD|Yes|44306|49001|Sweet I.|||21-APR-78|Defn on Tech File SE/53-8. Age updated by NABRE project. Lawn Hill Platform.|Fine to medium-grained qtz sst, with minor lithic sst, conglom. sst, siltstone and shale.  A lens of siltstone and shale mapped in Hedleys Creek area divides unit into upper and lower sections.|siliciclastic sedimentary rock|||N||17-JAN-23
Fishburn Formation|75076|Mount Goodwin Formation, Upper|74058|||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Goodwin Subgroup|75073|||Olenekian||||deposition|Olenekian|||||||WA|No|67370||Gorter, J.D. (Eni Australia), Nicoll, R.S. (GA)|19-MAR-09|||Intended to supersede the Upper Mount Goodwin Formation of Gorter (1998). Of Mount Goodwin Subgroup (Gorter, Nicoll, et al. in prep. Mar2009).|Grey and green claystones with minor siltstone and sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Fitzmaurice Group|6698|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Mesoproterozoic|1150||inferred|deposition|Paleoproterozoic|1640||isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||3500||No|32309||||||Fitzmaurice Basin. Fitzmaurice Mobile Zone. Wingate Mtns 1:100 000 sheet area. Thickness: >3500m. Age: ~1200Ma.  See also Fitzmaurice group.|Sandstone, siltstone, shale, minor grit and conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Flamingo Group|6726|Flamingo Shale|6730|||Yes|Group, Suite|Formal|Resvd name published|Fully described|||||Valanginian|136||biozone|deposition|Jurassic|150||biozone|||1230||No|41459||||||Reserved as Flamingo Shale Member. Age from Arafura Basin data.|Shale, siltstone, sandstone, sandy limestone, glauconitic sandstone, pyritic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Fleming Sandstone|6743|||||Yes|Formation, beds|Formal|Other new published name|Defined|Parsons Range Group|27873|||Statherian||||deposition|Statherian||||||370|NT|No|44299|43010|||||Age: Statherian.|Quartz sandstone: white to pink, thin to thick bedded, fine to medium grained; flat bedded to trough cross bedded; mud flakes, rare mudstone intraclast conglomerate; cauliflower chert nodules|siliciclastic sedimentary rock|||N||17-JAN-23
Flint Spring Gneiss|41994|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Jennings Suite|30859|Paleoproterozoic|||||Paleoproterozoic||||||||No|9199||||||See also Flint Springs Gneiss - place name is Flint Spring (not Flint Springs)!|Porphyroblastic and augen gneiss; banded and schistose biotite gneiss, locally garnet-bearing; amphibolite|foliated metamorphic rock|high grade metamorphic rock||N||17-JAN-23
Floraville Formation|6767|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Eocene||||deposition|Paleocene||||||40|QLD|No|33183|33183|||||Subsurface unit, appears on schematic diagram only.|Clayey quartz sandstone, conglomerate; minor mudstone and siltstone|siliciclastic sedimentary rock|||N||17-JAN-23
Florina Formation|75722|||||Yes|Formation, beds|Reserved|Reserved|Defined|||||Floian|||biozone|deposition|Tremadocian|||biozone|||167|NT|Yes|69451||Glass, L., Munson, T. (NTGS)|06-AUG-10|Normington, V.|25-MAR-15|Previously identified as part of Jinduckin Formation and Oolloo Dolostone (eg Randal 1962, Jones 1971). Fossiliferous: sparse fauna of trilobites, brachiopods, conodonts, echinoderms, gastropods, hyoliths. Definition to be published in:Tickell SJ, Kruse PD and Munson TJ, in prep. Revision of the Cambrian-Ordovician succession of the Daly Basin, Northern Territory. Australian Journal of Earth Sciences.|Alternating bedded dolostone, fine-grained glauconitic siliciclastic rocks (fine sandstone and minor shale) and minor bedded limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Foelsche Leucogranite|23596|||||Yes|Formation, beds|Formal|Other new published name|Described|||Saunders Suite|31734|Paleoproterozoic|1825|||intrusion|Paleoproterozoic|1825|||||||No|39679||P.G.Stuart-Smith|09-SEP-83|||Pine Creek Province. Part of the Cullen Supersuite. Intrudes Fingerpost Granodiorite|Fine to medium grained, equigranular leucogranite|acid intrusive rock|||Y||17-JAN-23
Fog Bay Metamorphics|24278|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Woodcutters Supergroup|72988|||Orosirian|1853|4|inferred, isotopic correlation|deposition|Orosirian|2028|8|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|22809|41305|B.Pietsch|23-SEP-86|Kruse, P.D.|08-APR-88|Defined in Darwin 1:250 k Explan Notes (1987). Reserved as Fog Bay (Berkman 1979). Intruded by Wagait Granite. Included in Cosmo Supergroup in AGES 2007abstract. Metamorphic age: 1853+/-4 Ma (RefID 64956, 2008). Max. sedimentation 2028 Ma (Carson et al. 2009). Litchfield North map (2010) shows Fog Bay Metamorphics as part of Woodcutters Supergroup.|Garnet schist and gneiss, possible volcanigenic rocks, minor carbonate and quartzite.|foliated metamorphic rock|high grade metamorphic rock||N||17-JAN-23
Forty Five Augen Gneiss|29775|Forty Five Bore Orthogneiss|6843|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Mount Zeil Suite|31337|Paleoproterozoic|1754|9|isotopic, Sm/Nd||Paleoproterozoic|1760|12|isotopic, Sm/Nd||||NT|Yes|43225|43503|Shaw R.D., Warren, R.G., Teyssier C., Wakelin-King G.A.|03-JUL-91|||Defn cd for Forty Five Gneiss with State Convener 2-Oct-91. BD as Forty Five Bore Orthogneiss RC92/022. Arunta Block. Intrudes the Narwietooma Metamorphic Complex.|Augen gneiss, deformed migmatitic granodiorite; minor microgranite, homogenous granitic gneiss|high grade metamorphic rock|foliated metamorphic rock||Y||09-AUG-23
Fossil Head Formation|6858|Fossil Head beds|6860|||Yes|Formation, beds|Formal|Other new published name|Fully described|Kinmore Group|9623|||Roadian|||biozone|deposition|Sakmarian|||inferred, biostratigraphic correlation|||590|WA|No|23820||||||Gas prone unit. Numerical age: ~287-~273Ma (Sakmarian - Kungurian, from 2001 chart. 2015 biozonation and stratigraphic chart shows the unit as Sakmarian- Roadian.|Carbonaceous siltstone and mudstone with sandstone and minor limestone. Abundantly fossiliferous.|fine grained siliciclastic rock|||N||17-JAN-23
Foster Cliff Granite|33651|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Mantarurr Granite Suite|33648|Mesoproterozoic|1170|||intrusion|Mesoproterozoic|1170||||||NT|Yes|60572|60683|Scrimgeour I., Close D., Edgoose C.|27-JUL-99||27-JUL-99|Petermann Ranges 1:250 000 sheet area. Age by correlation with Kulu Granite. Of the Pitjantjatjara Supersuite. Formerly mapped as Olia Gneiss and unnamed metamorphosed granites of Forman (1969a, 1972). Sharply intrudes Utanta and Wala Wuru Granites.|Finely porphyritic to equigranular foliated biotite-titanite-epidote-muscovite granite, minor aplite.|acid intrusive rock|||Y||17-JAN-23
Fosters Suite|80343|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||Baikal Supersuite|80342|Statherian|1770||||Statherian|1780|4|inferred, geochemical correlation|magmatic crystallisation|||NT|Yes|72515|72516|Beyer, E. (NTGS)|29-NOV-17|Normington, V.|15-NOV-18|Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. The Fosters Suite is a suite of ca. 1.77 Ga I-type felsic high-K (calc alkaline) series granites. It consists of three named units; Unca Granite, Thring Granite, and Jericho Granite.|I-type felsic high-K granites.|acid intrusive rock|||Y|I-type|17-JAN-23
Frances Creek Leucogranite|23601|Frances Creek Granite|30406|||Yes|Formation, beds|Formal|Variation of published name|Described|||Burnside Suite|31738|Orosirian|1800|||intrusion|Orosirian|1825|||||||No|39679||Needham, R.S.|13-JUL-83|||Pine Creek Province.  Of the Cullen Supersuite. See also variation F.C. Granite. Intrudes McCarthys Granite, Allamber Springs Granite, Minglo Granite and Masson Formation.|Light grey to pale pink, fine- to medium-grained, porphyritic to equigranular biotite leucogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Francis Dam Granodiorite|83012|||||Yes|Formation, beds|Formal|Reserved|Defined|||Mount Lamb Suite|83008|Orosirian|1839.9|3.8|inferred, intrusive relationship||Orosirian|1846.1|4.8|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|||Schofield, A., Clark, A. (GA)|28-MAR-22|Munson, T. (NTGS)|25-NOV-22|Due to lack of available place names, a theme of juvenile animals has been used for the constituents of the Mount Lamb Suite. Type locality: Drill-hole NDIBK09, down-hold depth from 161.58 m to 166.91 m. Drilled at 608328 mE and 7843609 mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. More equigranular and older than the Quart Pot Porphyry, which makes up the only other known basement stratigraphy in the vicinity of the type intersection of the Chick Granodiorite.|Medium- to coarse-grained granodiorite comprising plagioclase, K-feldspar, quartz and minor weakly oriented biotite, white mica and hornblende, with traces of apatite, zircon, titanite and rutile.|acid intrusive rock|||Y||03-FEB-23
Frankenia Monzogranite|42090|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Coomarie Suite|41161|Paleoproterozoic|1805|6|isotopic, Pb/Pb|intrusion|Paleoproterozoic|1805|6|isotopic, Pb/Pb|||||No|23809||||||Same as Frankenia Granite? Also referred to as Frankenia Dome granite. Now (2013) of  Grimwade Suite.|Dark pink, fine- to medium-grained equigranular muscovite-biotite monzogranite to quartz monzonite.|acid intrusive rock|intermediate intrusive rock||Y||17-JAN-23
Fraynes Formation|6892|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian|1638|9|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|||inferred, underlying unit|deposition||165|NT|No|28255|48943|||||Overlain by the former Bardia Chert Member (Skull Creek Formation) now remapped as Tertiary silcrete/duricrust. Inferred age presumably from dating of tuffite in other underlying Limbunya Group units.Birrindudu Basin.|Dolomitic siltstone, silty dolostone, dolostone,  micaceous siltstone, chert, feldspathic sandstone, minor tuffite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Fraynes Formation, Killaloc Formation|76749|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Limbunya Group|10414|||Statherian||||deposition|Statherian||||||||No|||NTGS 2011, Liu, S. (GA)|19-JAN-12|||Combined unit to be used in Waterloo area Northern Territory,  on 1:1 million surface geology map, National Geological Maps Project 2012 update.|Dolomitic siltstone, silicified dolostone|carbonate sedimentary rock|||N||17-JAN-23
Frederick Suite|40071|||||Yes|Group, Suite|Formal|Resvd name published|Described|||||Statherian|1801|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Orosirian|1815|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|50315||Green, M.|08-JAN-03|||Age: ~1800Ma. In the Tanami Inlier. Includes the "Pipeline granodiorite". Shown as equivalent in age to Granites Suite and Borefield Road Suite.|Medium- to fine-grained, equigranular biotite- or hornblende-bearing monzogranite to syenogranite. I-type.|acid intrusive rock|||Y|I-type|17-JAN-23
Frere Formation (NT)|29301|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned||||||||||||||||||No|41663||||||Formation misspelt as "Fromation" in the bibliographic reference. Different unit from Frere Formation in W.A? - appears to be geographically removed from it.|||||N||17-JAN-23
Frew River Formation|24280|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Orosirian|1820||inferred, lithostratigraphic correlation||150|600|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project.  Within Hatches Creek Group.|Siltstone, feldspathic/lithic arenite, mudstone, limestone and dolostone; stromatolites.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Frigate Shale|27270|Frigate Formation|24992|||Yes|Formation, beds|Formal|Resvd name published|Defined|Flamingo Group|6726|||Valanginian||||deposition|Oxfordian|||||||WA|No|41459|42442|A.J.Mory|17-JUL-87|||See also Frigate Formation.|Shale, calcareous shale; minor glauconitic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Froud Formation|79774|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Winnall Group|79223|||Cambrian|||inferred, geological correlation|deposition|Neoproterozoic|||inferred, geological correlation||65|165|NT|Yes|72369||Donnellan, N. (NTGS)|28-FEB-17|Munson, T., Normington, V.|08-MAR-17|Named after Froud Creek in HENBURY SG53-10 (around long 133.2812 degrees and lat -24.7832 degrees. To be published:  Donnellan N and Normington VJ, 2017. Towards a stratigraphy for the Neoproterozoic and probable early Cambrian in the central Amadeus Basin, Northern Territory: in Annual Geoscience Exploration Seminar (AGES) Proceedings, Alice Springs, Northern Territory 28-29 March 2017. Northern Territory Geological Survey, Darwin.|Thinly-bedded, locally fissile, grain-size laminated quartz arenite.|medium-coarse grained siliciclastic rock|||N||02-JUN-23
Gadabara Volcanics|21824|Bickerton Volcanics|1573|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Fagan Supersuite|31308|Statherian|1670|10|inferred, overlying unit|minimum depositional age|Statherian|1815|13|inferred, underlying unit|maximum depositional age||50|NT|Yes|43292|43292|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|27-APR-94||14-MAR-95|Blue Mud Bay 1:250 000 sheet area. Intrudes and overlies Bradshaw Complex and Woodah Sandstone. Previously part of undifferentiated  "Bickerton Volcanics".|Pink to brown, coherent and banded felsic igneous rocks including trachyte; volcanic breccia. Includes sub-volcanic dykes.|intermediate volcanic rock|||N||17-JAN-23
Gali Member|34083|||||Yes|Member, phase|Formal|Other new published name|Defined|Badalngarrmirri Formation|26360|||Statherian||||deposition|Statherian||||||360|NT|Yes|44112|24048|||||Within the Parsons Range Group. Age is constrained by over- and underlying units - to <1710 and >1620Ma.|Laminated to thin- and wavily-bedded, and hummocky cross-stratified mudstone and fine to coarse siltstone; interbeds of thin to medium bedded, fine-grained clayey sandstone in the upper part.||||N||17-JAN-23
Galifrey granite|42092|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||Paleoproterozoic|1814|2||intrusion|Paleoproterozoic|1814|2||||||No|23809|||||||Granite.|acid intrusive rock|||Y||17-JAN-23
Galiwinku Dolerite|77145|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ectasian|1325|36|isotopic, U/Pb-Pb/Pb ICP-MS|intrusion|Statherian|||inferred, intrusive relationship||||NT|Yes|67779||||Normington, V.|11-FEB-16|PROPOSED PUBLICATION of definition: Whelan JA, Beyer EE and Donnellan N, 2016.  1.4 billion years of Northern Territory geology: insights from collaborative U-Pb zircon and baddeleyite dating, : in 'Annual Geoscience Exploration Seminar (AGES) Proceedings, Alice Springs, Northern Territory 16-17 March 2016'.  Northern Territory Geological Survey, Darwin. In Arnhem Land. 1325 Ma date is SIMS U-Pb on baddelyite.|Quartz normative and olivine normative dolerite|basic intrusive rock|||Y||17-JAN-23
Gardiner Sandstone|7009|Gardiner Formation|7008|||Yes|Formation, beds|Formal|Variation of published name|Defined|Birrindudu Group|1735|||Calymmian|1560|20|isotopic, K/Ar|deposition|Statherian|1768|14|isotopic, U/Pb-Pb/Pb ion probe||1000|3000|NT|No|30878|45140|||||Age of 1560.00 (K/Ar) is taken from the Birrindudu Group on the 2006 Geology of NT 2.5 million scale map, and is significantly older than previous references.  A subsequent  SHRIMP U-Pb study (RefID: 64662) of detrital zircon in the Tanami region, gives an age: ~1.77 - 1.64 Ga, for same reasons as unconformably underlying Pargee Sandstone (p40-41).|Cross bedded, thinly to thickly bedded white sublithic medium to coarse grained, poorly sorted quartz sandstone with siltstone, shale; minor glauconitic sandstone and flaggy dolomitic sandstone, and basal conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Garrthalala Granite|34076|||||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Giddy Suite|30863|||Orosirian||||intrusion|Orosirian|1833|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|44112|44112|||||See also Garthalala Granite. To become part of (reserved) Wanyanmera Suite.|Granite, medium- to fine-grained, porphyritic, K-feldspar megacrystic, massive, contains fayalite, distinctly reddish-brown weathered surface; fine- to medium-grained white granite xenoliths (thermally metamorphosed Bradshaw Complex). Metaluminous.|acid intrusive rock|||Y||17-JAN-23
Gator Sandstone|37734|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Carrara Range Group|3679|||Statherian||||deposition|Orosirian|1854|7|isotopic, Pb/Pb||100|700|NT|Yes|24442||Rawlings, D.|22-NOV-02|||Used in Lawn Hill Platform and South Nicholson Basin area. MOUNT DRUMMOND 1:250 000 map sheet area. Although the published 'definition' does not explicitly discuss 'distinguishing features' of this unit, the fact that it is stated to lie between two volcanic units provides enough information to be considered a unit definition.[CEB Feb-2012]|Pink to purple, fine to medium garined, variably ferruginous, sublithic to lithic sandstone, local beds of coarse to pebbly sandstone; minor basalt and microdolerite.|siliciclastic sedimentary rock|||N||17-JAN-23
Gaylad Sandstone|24283|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Ediacaran|600||inferred|deposition|Neoproterozoic|700||inferred|||139|NT|No|49796|22649|M.Freeman, R.Oaks|11-OCT-85|||Defined in 00/30294. Age is tentatively placed midway between 700 and 600 Ma. Lower Ediacaran.|Quartz sandstone, lithic sandstone, subarkose, orthoconglomerate and rare debris-flow diamictite.|siliciclastic sedimentary rock|||N||17-JAN-23
Geolsec Formation|37623|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic|1700|||deposition|Paleoproterozoic|1780|||||200|NT|Yes|24442||Lally,J.H. and Ahmad, M.|18-OCT-02|Kruse, P.D.|18-OCT-02|Age: younger than 1780 Ma. Last regional metamorphism and folding. Deposited around the Waterhouse Dome.|Haematitic quartzite breccia, haematitic mudstone, siltstone and sandstone; minor phosphatic siltstone and breccia, fault scarp breccia.|siliciclastic sedimentary rock|||N||17-JAN-23
Georgina Gap granitic gneiss|24284|Georgina Gap Granite|69127|||Yes|Formation, beds|Informal|Resvd name published|Defined|||Jennings Suite|30859|Statherian|1771||isotopic, U/Pb||Statherian|1771||isotopic, U/Pb||||NT|Yes|48992||R.D.Shaw|21-FEB-75|Branch, C., Brown, M.|01-MAR-79|DEFINED. Technically invalid name because Georgina Limestone used in same State. Also published as Georgina Gap Granite. Appears to intrude the Mulga Creek granitic gneiss, unassigned gneiss and amphibolite (pC), and the Laughlen metamorphics.|Porphyroblastic-feldspar granitic gneiss|foliated metamorphic rock|metamorphosed acid igneous rock||Y||17-JAN-23
Georgina Limestone|7137|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Iverian|||biozone|deposition|Undillan|||biozone|||601|QLD|No|44543|44309|||||See also Lexicon. SE53-16.Of Ogilvie (1931) for fossiliferous carbonate rocks near the Georgina River. Mapped by Whitehouse (1936). Now defunct term embracing Middle Cambrian to Cambro-Ordovician rocks that straddle the NT-QLD border. Included by Noakes and Traves (1954) in their Barkly Group [from Kruse & Radke, 2008]. Georgina Limestone, as defined by Opik (1960) appears to be in current use elsewhere in Georgina Basin [CEB Apr2015].|Sandy and laminated micrite, intraformational conglomerate, two-toned limestone, algal boundstones, minor oolitic grainstones and silicification.|carbonate sedimentary rock||continental rift|N||17-JAN-23
Gerowie Tuff|27961|Gerowie Chert|7148|||Yes|Formation, beds|Formal|Variation of published name|Fully described|South Alligator Group|17111|Gerowie Suite|31730|Orosirian|1862|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1864|3|isotopic, U/Pb-Pb/Pb ion probe|||750|NT|No|35140||||||Also referred to as Gerowie Ashstone. Intruded by Cullen Supersuite. up to 750m thick. Hosts Au deposits in the Brocks Creek goldfield (quartz veins) and elsewhere. Hosts the Fleur de Lys U deposit and the Rosemary Sn deposit.|Pale green, brown or grey siliceous siltstone and phyllite interbedded with pale cherty argillite, black cherty crystal tuff, spotted feldspathic crystal tuff and lithic tuff; minor felsic ignimbrite, chloritic volcaniclastic shale.|medium-coarse grained siliciclastic rock|acid volcanic rock||N||17-JAN-23
Ghost Gum Granite|81845|Ghost Gum granite|82058|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Ordovician|467|9|isotopic, U/Pb-Pb/Pb ion probe|metamorphism||||||||NT|Yes|||Reno, B. (NTGS)|17-FEB-20|Munson, T. (NTGS)|25-AUG-22|Closest town is Alateye NT and occurs on the HUCKITTA map sheet. To be published in the Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF3-11. Mentioned in Kositcin and Reno, 2020, NTGS Record 2020-001.|Biotite granite.|igneous intrusive rock|||Y||02-JUN-23
Gibb Member|36070|Gibb Bluff Member|30266|||Yes|Member, phase|Formal|Variation of reserved name|Defined|Mainoru Formation|11034|||Calymmian||||deposition|Calymmian|||||0|250|NT|No|60573|23937|Young D.|01-JUN-01|||Reserved as Gibb Bluff Member (Young, D. 2001. Together with Wadjeli Sst was previously mapped as upper part of Limmen Sandstone.   Both members now  reassigned to lower Mainoru Fm (Abbott and Sweet, 2001).|Dark grey and olive-black mudstone, laminated, thin beds of siltstone and fine-grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Gibbie Formation|28284|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Calymmian||||||144|NT|No|28255|48943|||||Basis of age limits not clear. Birindudu Basin.|Interbedded siltstone and fine sandstone, minor dolostone.|siliciclastic sedimentary rock|||N||17-JAN-23
Giddy Granite|27414|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Giddy Suite|30863|Orosirian|1836|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1836|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|42597|43010|||||Age: Orosirian. To become part of (reserved) Wanyanmera Suite.|Massive, medium to coarse grained, equigranular, granophyric, fayalite-bearing granite; intruded by microgranite dykes and sills|acid intrusive rock|||Y||17-JAN-23
Giddy Suite|30863|||||Yes|Group, Suite|Informal|STRATLEX Entry|Described|||||Orosirian|1835||||Orosirian|1835|||||||No|50591||||||Age: Orosirian. To be replaced by the Wanyanmera Suite.|I-type fayalite-bearing granites; A-type granites; Fayalite-biotite bearing granites.|acid intrusive rock|||Y|A-type|14-JUL-23
Giddy Suite - unnamed plutons|72367|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Giddy Suite|30863|Orosirian||||intrusion|Orosirian||||||||No|||||||Lithology referring to an informal unnamed unit of the Giddy Suite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Massive, medium to fine grained, tourmaline-bearing granite|acid intrusive rock|||N||17-JAN-23
Gidyea Granite|75898|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|Granite.|acid intrusive rock|||Y||17-JAN-23
Gilbert River Formation|7197|Battle Camp Sandstone|1261|||Yes|Formation, beds|Formal|Variation of published name|Redefined|||||Lower Cretaceous|131|||deposition|Upper Jurassic|157||||3|283|QLD|No|39027|33182|||||Redefined 1972. Also replaces Wrotham Park Sandstone. Part of the Trans-Australian Platform Cover. Contains the Batavia, Glennie, Briscoe, Yappar and Coffin Hill Members within its units. See also misspelt George River Formation (RefID 68821).|Medium to coarse-grained, clayey quartzose sandstone and pebbly sandstone (commonly cross-bedded); minor quartz pebble conglomerate, siltstone, mudstone. Locally bioturbated.|siliciclastic sedimentary rock|||N||17-JAN-23
Giles Complex|7206|||||Yes|Group, Suite|Formal|Other new published name|Defined|||Warakurna Supersuite|73257|Stenian|1052|11|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Stenian|1078|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion||||No|43969|43609|||||Consists of massive, partly deformed and recrystallised, layered mafic-ultramafic intrusions emplaced in the southern granulite-facies zone of Musgrave Block; over 20 massive and layered mafic-ultramafic intrusions. Part of Warakurna Large Igneous Province? See also Giles Suite which may replace this unit.|Layered mafic-ultramafic intrusions: gabbro, gabbronorite, norite, troctolite, pyroxenite, melagabbro, anorthosite|basic intrusive rock|ultramafic intrusive rock||Y||11-AUG-23
Giles Creek Dolostone|67994|Giles Creek Dolomite|25006|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Pertaoorrta Group|15091|||Middle Cambrian||||deposition|Middle Cambrian||||||383||No|60419|||||||Fossiliferous dolomite and limestone, minor siltstone and shale.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Gillen Formation|32943|Gillen Member|27416|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Bitter Springs Group|79261|||Tonian|820||inferred, overlying unit|deposition|Tonian|896|24|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1505|NT|Yes|48880||Normington, V., Donnellan, N. (NTGS) (after Wells et al 1967)|02-SEP-15|Whelan, J., Normington|28-SEP-15|Ref to Banks (1964) unpubl. Suggested subdivision of Bitter Springs Limestone. Gillen Member used 1967 to 2015, then redefined as Formation of redefined Bitter Springs Group. Maximum depositional age of 896 +/- 24 Ma for  detrital zircon U-Pb SHRIMP sampled from informal member 3  (Kositcin et al 2014). This is considerably older than the inferred deposition of 820 Ma of the Bitter Springs Group. PROPOSED PUBLICATION: Normington and Donnellan, in prep. Characterisation of the Neoproterozoic stratigraphy of the northeast Amadeus Basin, Northern Territory. Northern Territory Geological Survey Report.|Grey to yellow, brecciated limestone/dolostone interbedded with gypsum/anhydrite and siltstone. Evaporite sequence of multiple cycles of halite, anhydrite and partly magnesite near middle of unit.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Gilruth Volcanic Member|7242|||||Yes|Member, phase|Formal|Resvd name published|Defined|Gumarrirnbang Sandstone|33374|||Statherian|1729||inferred, intrusive relationship|eruption|Statherian|1820||inferred, underlying unit|maximum depositional age||5|NT|Yes|33186||Needham, R.S.|16-AUG-74|Strusz, D.L.|16-SEP-74|Within the Katherine River Group. Originally defined as part of the Kombolgie Formation. See also the informal "Gilruth Volcanic Member",Gilruth Member, Gilruth Volcanics.|Vesicular and amygdaloidal basalt, tuffaceous siltstone, minor banded quartz-jasperite; highly ferruginised and weathered.|basic volcanic rock|||N||17-JAN-23
Gimbat Ignimbrite Member|28045|Gimbat Formation|21850|||Yes|Member, phase|Formal|Variation of published name|Defined|Pul Pul Rhyolite|15650|David Suite|72698|Paleoproterozoic|1794|11||intrusion|Paleoproterozoic|1830|12|||||NT|No|43718|43718|||||Reserved as Gimbat Formation.|Ignimbrite.|acid volcanic rock|||N||17-JAN-23
Glass Hill Sandstone|23618|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Mahony Group|23749|||Frasnian||||deposition|Frasnian||||||||No|41840||P.E.Playford|04-MAY-83||||Medium- to fine-grained quartz arenite; minor pebbly sandstone, conglomerate and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Gleeson Formation|38413|Tomkinson Creek beds|18320|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Renner Group|38406|||Calymmian||||deposition|Calymmian|||||30|650|NT|No|24304|24303|||||Reserved as Gleeson Creek (Hussey, 1996). Previously mapped as undifferentiated Tomkinson Creek beds.|Conglomerate; lithic to quartz arenite;lensing, thin to very thick bedded, granular to cobble; micaceous sandstone, pebbly sandstone, lag conglomerate; mudstone, convolute laminated, graded, crossbedded, current lineated, megarippled, dessicated.|siliciclastic sedimentary rock|||N||06-SEP-23
Glen Helen Metamorphics|21856|Dashwood Creek migmatite|5262|||Yes|Formation, beds|Formal|Resvd name published|Defined|Madderns Yard Metamorphic Complex|29769|||Statherian|1661|8|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1688|16|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|01-JUL-91|||Arunta Block. Defn card with State Convener (advised 2-Oct-91). Proterozoic Granites Project include this unit in Madderns Yard Suite.  Warumpi Province.|Felsic migmatitic orthogneiss, foliated granite, rare amphibolite, pelite, psammite; biotite-sillimanite +/- garnet pelite, psammite, minor amphibolite.|high grade metamorphic rock|||Y||17-JAN-23
Glendower Formation|7387|Glendower Series|33640|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Lutetian||||deposition|Thanetian||||||145||No|44295|64047|||||See also Lexicon. Waite Basin.|Fluviatile pebbly clayey quartzose sandstone, sandy siltstone, conglomerate and minor mudstone; commonly lateritised and silicified.|siliciclastic sedimentary rock|||N||17-JAN-23
Glenhill Formation|7417|||||Yes|Formation, beds|Formal|Other new published name|Described|Carr Boyd Group|3663|||Tonian|1057|80|isotopic, Rb/Sr|deposition|Stenian|1057|80|isotopic, Rb/Sr|||300||No|44363||||||Age: 1057 +/- 80 Ma.|Red, green and black, commonly laminated siltstone, shale and fine sandstone (locally glauconitic); blocky quartz sandstone.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Gloaming Formation|79224|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Winnall Group|79223|||Cambrian||||deposition|Ediacaran|578||inferred, geological correlation||170||NT|Yes|72369||Normington, V. (NTGS)|01-SEP-15|Reno, B., Normington,V.|08-MAR-17|Map Sheet: HENBURY SG53-1, 5548? place name on Rodinga SG53-2, 5648. Nearest Town: Stuarts Well. This will be part of the Winnall Group (elevated from Winnall beds). To be published: 2nd Edition Henbury 250K geology map and associated explanatory notes, release 2018. also Donnellan N and Normington VJ, 2017. Towards a stratigraphy for the Neoproterozoic and probable early Cambrian in the central Amadeus Basin, Northern Territory: in Annual Geoscience Exploration Seminar (AGES) Proceedings, Alice Springs, Northern Territory 28¿29 March 2017. Northern Territory Geological Survey, Darwin.|Fine- to medium-grained, generally well-sorted and well-rounded, thin-medium-bedded dark brown quartz arenite and subarkose.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Glyde package|81659|||||Yes|Supergroup|Informal|Sequence strat published|Briefly described|||||Statherian|||||Statherian||||||||No|72373||||||Includes Habgood Group, lower Balma Group, McArthur Group, Vizard Group.|||||N||17-JAN-23
Gnallan-a-Gea Arkose, Black Stump Arkose, Thorntonia Limestone|72647|||||Yes|Subgroup|Informal|Variation of published name|Described|||||Middle Cambrian||||deposition|Ediacaran||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Gnallan-a-Gea Arkose: pebbly arkose, sandstone, siltstone, shale. Thontonia Limestone: Dolostone, limestone; medial pyritic-carbonaceous black shale interbeds; basal terrigenous sandstone. Black Stump Arkose: Micaceous (to pebbly) arkose, sandstone|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Gnallan-a-gea Arkose|24291|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mopunga Group|12305|||Ediacaran||||deposition|Ediacaran|||inferred, underlying unit|||1450|NT|Yes|35798|48990|M.R.Walter|11-OCT-77|Passmore, V.L.|26-MAY-80|See also spelling variations: Gnallan-A-Gea, Gnallan-a-Gea. See also Geology of Queensland 2013, p94.|Light brown to grey fine to very coarse grained pebbly arkose, sandstone, siltstone and, shale. The arkose and sandstone is frequently cross-stratified.|siliciclastic sedimentary rock|||N||17-JAN-23
Goat Paddock beds|69657|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Early Eocene|||||Early Eocene||||||212||No|61155||||||overlies Ord and Wiso Basins.|Unknown.||||N||17-JAN-23
Gold Creek Volcanics|7486|Gold Creek Volcanic Member|7484|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Tawallah Group|17902|||Statherian|1723|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|||||15|230|NT|No|44272|45162|||||Intruded by the Packsaddle Microgranite. Variously described as intermediate to felsic volcanics and amygdaloidal vesicular basaltic volcanics with interbedded sediments. Appears to be quite variable. Hosts breccia pipe Cu(Co-Ni) deposits.|Porphyritic basalt; dolomitic to quartzic sandstone, mudstone, peperite breccia, local autobreccia, local stratiform polymict breccia and massive sandstone bodies, local chlorite-bitumen alteration and sulfides.|intermediate volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Golden Gate Siltstone|7497|Golden Gate Formation|7496|||Yes|Formation, beds|Formal|Variation of published name|Described|Carr Boyd Group|3663|||Stenian|1158|123|isotopic, Rb/Sr|deposition|Ectasian||||||60||No|44363|||||||Mudstone and thinly bedded fine-grained sandstone.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Golliger beds|69658|Golliger Beds|7522|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Middle Miocene||||deposition|Early Miocene|22.5|||||15||No|61155||||||Geological region: Barkly Tableland.|Massive, white to yellow limestone; grey sandy limestone; contains abundant gastropods.|carbonate sedimentary rock|||N||17-JAN-23
Goobaieri Formation|7530|||||Yes|Formation, beds|Formal|Other new published name|Defined|Fitzmaurice Group|6698|||Mesoproterozoic|1150||inferred|deposition|Mesoproterozoic|||inferred, underlying unit|||615|NT|No|32310|48938|||||Fitzmaurice Basin.|Quartz sandstone, siltstone, shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Goodparla Dolerite|42477|Goodparla dolerite|28057|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Orosirian|1850|||intrusion|Orosirian|1860|||||300||No|24442||||||Age from 1:500K NTGS Pine Creek Orogen solid geology dataset. Intrudes Masson Formation. Previously mapped by Stuart-Smith et al. (1984) and Stuart-Smith et al. (1988a) as Oenpelli Dolerite and as an unnamed dolerite.|Dark grey, medium-grained olivine metadolerite with an ophitic texture.|basic intrusive rock|||Y||17-JAN-23
Goose Hole Group|23629|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Late Cambrian|||inferred|deposition|Middle Cambrian|||biozone|||700||No|41840||P.E.Playford|16-MAY-83|||525 Ma [basis for numerical age unclear. Timescale unclear. Reference from 1999] . Includes: Negri Subgroup, Elder Subgroup. Ord Basin.|Sandstone, siltstone, minor limestone (in part stromatolitic) and mudstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||21-MAR-23
Gosse River East Syenite|39138|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Devils Suite|30736|Paleoproterozoic|||inferred|intrusion|Paleoproterozoic|1712|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|23733||||||Probably an informal variation of Gosse River East Granite. How does this unit relate to Mumbilla Granodiorite? Is it a different unit, or not? Mumbilla Granite is shown as part of the older Tennant Creek Supersuite, on the 2004,' Mapped & interpreted geology of the Tennant region'.|Syenite.|intermediate intrusive rock|||Y||27-APR-23
Gough Dam Schist Zone|68344|||||Yes|unknown|Informal|Other new published name|Not recorded|||||Proterozoic|||||Proterozoic||||||||No|||||||Structural term.|Quartz-rich quartzofeldspathic gneiss; undifferentiated deformed rocks.|foliated metamorphic rock|metamorphic rock||N||17-JAN-23
Goulburn Group|7636|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Lower Ordovician|||||Middle Cambrian||||||1892||No|42056|||||||Lithology dominated by dolomite.||||N||17-JAN-23
Gove Sandstone|21894|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Spencer Creek Group|29406|||Statherian||||deposition|Statherian|1710|||||310|NT|Yes|44112|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94||14-MAR-95|Age: Palaeoproterozioc (Statherian)|Sandstone: white to pink, fine to very coarse-grained, quartzose, locally common quartz pebbles, trough cross-bedded.|siliciclastic sedimentary rock|||N||17-JAN-23
Goyder Formation|7646|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Furongian|||biozone|deposition|Middle Cambrian|511|20|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|90|600|NT|No|48838|48863|||||Gradationally related to Petermann Sandstone/Deception Siltstone/Cleland Sandstone/Shannon Formation succession below it. Minimum age: Payntonian (~491-488 Ma) based on palynology and trilobites (NTGS Record 2018-010, p iii, p17). Younger radiometric age (505+/-6 Ma) is a maximum depositional age for a sample from the central part of the basin (Henbury) taken from well below the contact with the overlying Pacoota Sandstone and 100s of metres above the contact with the Petermann Sandstone.|Silty sandstone with minor siltstone; fossiliferous and stromatolitic dolostone with minor limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Goyder package|81660|||||Yes|Supergroup|Informal|Sequence strat published|Briefly described|||||Statherian|1670||||Statherian|1683|||||||No|72373||||||Includes Parsons Range Group, upper part of Spencer Creek Group.|||||N||17-JAN-23
Grace Creek Granite|7652|Mount Harvey Porphyry|12784|||Yes|Formation, beds|Formal|Other new published name|Defined|||Jim Jim Suite|30779|Orosirian|1820|||intrusion|Orosirian|1863|5|isotopic, U/Pb||||NT|Yes|46678|45022|Needham, R.S.||Brakel, A.|14-FEB-86|Katherine 1:250 000 sheet area. Pine Creek Province. Formerly Mount Harvey Porphyry and Grace Creek Porphyry. Intrudes the Hindrance Creek Sandstone of the Edith River Group.|Red to pink-grey microgranite; porphyritic/xenocrystic, grey-pink fine granite minor fine-grained hornblende-biotite granite; porphyritic  fine to medium-grained hornblende-biotite granite; fine to medium-grained equigranular biotite granite.|acid intrusive rock|||Y||17-JAN-23
Grace Creek Granite - phase 1|72368|||||Yes|Member, phase|Informal|Variation of published name|Described|Grace Creek Granite|7652|David Suite|72698|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|||||||Lithology referring to an informal unnamed unit of the Grace Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Porphyritic, commonly xenocrystic, red to pink-grey microgranite|acid intrusive rock|||Y||17-JAN-23
Grace Creek Granite - phase 2|72369|||||Yes|Member, phase|Informal|Variation of published name|Described|Grace Creek Granite|7652|David Suite|72698|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|||||||Lithology referring to an informal unnamed unit of the Grace Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Porphyritic pink-grey-green, fine to medium grained hornblende-biotite granite; common xenocrysts|acid intrusive rock|||Y||17-JAN-23
Grace Creek Granite - phase 3|72370|||||Yes|Member, phase|Informal|Variation of published name|Described|Grace Creek Granite|7652|David Suite|72698|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|||||||Lithology referring to an informal unnamed unit of the Grace Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Porphyritic and xenocrystic grey-pink fine grained granite, local microgranite, minor fine grained hornblende-biotite granite|acid intrusive rock|||Y||17-JAN-23
Grace Creek Granite - phase 4|72371|||||Yes|Member, phase|Informal|Variation of published name|Described|Grace Creek Granite|7652|David Suite|72698|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|||||||Lithology referring to an informal unnamed unit of the Grace Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Fine to medium grained, equigranular grey-pink biotite granite|acid intrusive rock|||Y||17-JAN-23
Grant Bluff Formation|7690|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Mopunga Group|12305|||Ediacaran|||inferred, biostratigraphic correlation|deposition|Ediacaran|||inferred, underlying unit||20|1170|NT|Yes|44327|48990|Walter M.R. (after Smith 1964)|01-JAN-80|||Age is shown more specifically as Ediacaran (Late Adelaidean) in some recent refs.|Orange-brown, white and purple, laminated to medium undulose-bedded quartz sandstone/quartzite, glauconitic quartz sandstone, mudstone, arkose, siltstone, minor dolostone, local basal polymict conglomerate.|siliciclastic sedimentary rock||continental rift|N||12-JUL-23
Grayling Member|38411|Grayling|30248|||Yes|Member, phase|Formal|Resvd name published|Defined|Baralandji Formation|38410|||Calymmian||||deposition|Calymmian|1650|21|||100|500|NT|No|24304|24303|||||Reserved as Grayling (Hussey, 1996).  Previously mapped as undifferentiated Tomkinson beds in HELEN SPRINGS (Randal et al, 1966, and Randal and Brown, 1969).  Within the Renner Group.|Sandstone, sublithic to quartz arenite; laminated to thick bedded, fine- to medium-grained; micaceous, glauconitic; mudstone; quasi-planar and hummocky crossbedded; current lineated; ferruginous, recessive intervals, benched upper interval.|siliciclastic sedimentary rock|||N||06-SEP-23
Grebe Sandstone Member|7742|||||Yes|Member, phase|Formal|Resvd name published|Defined|Hibernia Formation|27432|||Lutetian||||deposition|Ypresian|||||||NT|No|41532|42442|||||Also previously referred to as Grebe Formation, Grebe Sands, Grebe Sandstone, Grebe Marl and Grebe Marl Member. Eocene. Grebe Sandstone Member reappears in Geology and mineral resources of the Northern Territory (2013) as basal Member of Hibernia Formation.|Sandstone, minor marl and limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Green Swamp Granite|78825|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||intrusion|||||||||No|64675||||||Informal company name?|Granite.|acid intrusive rock|||Y||17-JAN-23
Grimwade Ridge Intrusives|73205|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Inningarra Suite|41160|Paleoproterozoic|||||Paleoproterozoic||||||||No|62580||||||See also the informal Grimwade intrusives.|Predominantly fine-grained equigranular biotite monzogranite with minor leucocratic micro-monzogranitic dykes.||||Y||17-JAN-23
Grimwade Suite|40137|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Statherian|1791|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Orosirian|1844|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|61405||Green, M.|20-JAN-04|||In the Arunta region - Aileron Province generally weakly to non-magnetic.  Also referred to as Grimwade suite granites. Appears to incorporate diorite and gabbro (highly magnetic, moderate gravity response) of former Borefield Road Suite from 2014.|Fine, medium and coarse-grained, granite, monzogranite, syenogranite; K-feldspar megacrysts, metasedimentary xenoliths.|acid intrusive rock|||Y|I-type|17-JAN-23
Grimwade Suite - group 1|72648|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Grimwade Suite|40137|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory.|Medium-grained, massive granodiorite, locally coarse-grained to megacrystic, unfoliated to moderately foliated, sometimes with schlieren|acid intrusive rock|||Y||17-JAN-23
Grimwade Suite - group 2|72649|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Grimwade Suite|40137|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory|Fine-medium-coarse grained, granite, commonly with fine-grained mafic enclaves, porphyritic in places with K feldspars up to 2 cm, pegamatitic enclaves, generally moderately foliated|acid intrusive rock|||Y||17-JAN-23
Grimwade Suite - group 3|72650|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Grimwade Suite|40137|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory|Coarse-grained to megacrystic porphyritic granite, with rounded and/or tabular K feldspars up to 12 cm, in places melanocratic, with finer grained non-porphyritic dykes and pods, variable foliation defined by quartz and biotite|acid intrusive rock|||Y||17-JAN-23
Grimwade Suite - group 4|72651|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Grimwade Suite|40137|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory|Massive to porphyritic, medium- to coarse-grained granodiorite, numerous psammitic or biotite-rich enclaves, thin quartz-feldspar veins, tourmaline pegmatite veins, moderately foliated|acid intrusive rock|||Y||17-JAN-23
Grimwade Suite - group 5|72652|||||Yes|Formation, beds|Informal|Variation of published name|Described|||Grimwade Suite|40137|Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.  Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory|Fine to medium-grained massive granodiorite and biotite-rich granodiorite, numerous mafic enclaves and cognate xenoliths, variably foliated|acid intrusive rock|||Y||17-JAN-23
Grindall Formation|21914|Grindall Metamorphics|28171|||Yes|Formation, beds|Formal|Defined variation of published name|Defined|||||Orosirian|1837|4|inferred, intrusive relationship|minimum depositional age|Orosirian|1986|8|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000|NT|Yes|71606|22808|Haines P.W. (after Plumb and Roberts)|02-MAR-95|Brakel, A.|01-MAR-95|Variation on Grindall Metamorphics. Oldest known component of the Arnhem Inlier. Overlain by Groote Eylandt Group|Fine to medium grained, thin to thick bedded graded sandstone; interbedded mudstone; locally metamorphosed|siliciclastic sedimentary rock|||N||17-JAN-23
Groote Eylandt Group|33979|Groote Eylandt beds|26594|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Statherian|1750||inferred||Orosirian|1830||inferred|||1650|NT|Yes|71606|22808|Haines, Rawlings, Plietsch (after Plumb & Roberts)|01-MAR-95|Comm. Territories SNSC|01-MAR-95|Radiometric date from Bickerton Rhyolite, Bustrard Subgroup, ~ middle of the Group. Caledon Shelf, McArthur Basin.|Sandstone and conglomerate interbedded with felsic and mafic volcanic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Groundrush dolerite|81232|||||Yes|Formation, beds|Formal|Variation of published name|Described|||||Orosirian|||||Orosirian|1864|||||||No|69747|||||||Medium-grained; chlorite alteration. Subhedral plagioclase and anhedral hornblende laths. Mineral assemblage of plagioclase, hornblende, chlorite, diopside.|basic intrusive rock|||Y||17-JAN-23
Gum Ridge Formation|7866|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Barkly Group|32954|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone||3|150.5|NT|Yes|44960|24303|||||See also Lexicon. P.D. Kruse, after Opik in Ivanac 1954. In the Barkly Sub-basin (Georgina Basin). Lateral correlative of Montejinni Limestone. In the Amelia Creek impact structure this unit is composed of chert and cherty breccias up to 10m thick.|Grey, partially dolomitised massive, ribbon, bioclast, lithoclast and minor onkoid limestone, minor cryptomicrobial dololaminite and grey siliciclastic mudstone; brown-maroon siltstone at base; recessive outcrop pervasively chertified and lateritised|carbonate sedimentary rock|siliciclastic sedimentary rock|continental rift|N||03-JUN-23
Gum Tree Granite|7869|Gumtree Granite|7879|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Wuluma Suite|41833|Statherian|1728|||intrusion|Statherian|1728|||||||No|48992|||||||Porphyritic biotite granite, numerous acid dykes|acid intrusive rock|||Y||17-JAN-23
Gum Waterhole Member|84113|Tobacco Member|37740|||Yes|Member, phase|Formal|Other new published name|Fully described|||||Calymmian|||||Calymmian|1591|7|||||NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|This unit replaces part of the Tobacco Member NW of Michiebo Fault.|medium-very thick beds, diffuse beds, quartzose to lithic, locally ferruginous and micaceous (± glauconitic), fine- medium-gr sandstone. Medium-coarse-gr glauconitic sandstone, w small red/brown mudstone flakes, pits. Minor v coarse pebbly lithic Sst.||||N||09-OCT-23
Gumarrirnbang Sandstone|33374|Gumarirnbang|31286|||Yes|Formation, beds|Formal|Resvd name published|Defined|Kombolgie Subgroup|33373|||Statherian|||inferred|deposition|Statherian|1787|17|inferred, geological correlation|||260|NT|No|60571|23374|Carson L., Brakel A., Pietsch B.|29-APR-97|Beier, P.|25-FEB-99|Milingimbi, SD53-02 sheet area. Bedrock associated with the Liverpool impact crater - abruptly upturned and brecciated at the margin of the impact crater. Intruded by the Oenpelli Dolerite. Formerly the Kombolgie Formation.|White, trough cross-bedded, medium to very coarse pebbly quartz sandstone; thinly to medium-bedded wave-rippled medium to coarse quartz sandstone; minor pebble conglomerate and trough cross-bedded very coarse lithic sandstone at base.|siliciclastic sedimentary rock|||N||17-JAN-23
Gumtree Suite|79168|Gumtree Granite Suite|33423|||Yes|Group, Suite|Informal|Variation of published name|Mentioned|||||Paleoproterozoic|||inferred, geochemical correlation||Paleoproterozoic|||inferred, geochemical correlation|||||No|69931||||||Presented in text as the Napperby, Wuluma and Gumtree suites. Aileron Province. May be accidental or deliberate change from Gumtree Granite Suite. See also Gum Tree Granite of Wuluma Suite.|Granite.|acid intrusive rock|||Y||09-AUG-23
Gun Supersequence|40575|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Statherian|1674||inferred||Statherian|1688||inferred|||||No|66844||||||Equivalent to parts of lower McNamara Group. Includes Esperanza Formation, Paradise Creek Formation, upper Gunpowder Creek Formation, and Torpedo Creek Formation.|Sandstones, siltstones, dolostones.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Gunbarrel Granite|42371|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Illili Suite|41845|Statherian|||inferred, geochemical correlation|intrusion|Statherian|||inferred, intrusive relationship|||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15).|Foliated porphyritic biotite granite with rounded K-feldspar phenocrysts; common rapakivi textures, locally migmatic.|acid intrusive rock|||Y||17-JAN-23
Gunbatgari Complex|7881|Gunbatgari Granite|7882|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Orosirian|||||Orosirian|||||||NT|No|41406|43010||||||Migmatitic hornblende-biotite-bearing monzogranite with a granoblastic fabric.|intermediate intrusive rock|||Y||17-JAN-23
Gundi Sandstone|27994|Gundi Greywacke|7894|||Yes|Formation, beds|Formal|Transferred from STRATLEX Mar 1995|Defined|Katherine River Group|9312|||Statherian|1710|||deposition|Statherian|1720|||||500|NT|Yes|43149||||||See also fully described Gundi Greywacke. Previously: Gundi Creek Greywacke Member (Ruker, 1959); Gundi Greywacke Member (Randal, 1963); Gundi Greywacke (Walpole et al., 1968); also of Dunn (1963).|Medium- to coarse-grained, medium to thickly bedded, pink lithic and feldspathic sandstone with mud matrix, local pebble to boulder conglomerate; minor mudstone; ferruginous maroon to red-brown mafic igneous rocks and porphyritic rhyolite.|siliciclastic sedimentary rock|||N||17-JAN-23
Gunpowder Creek Formation|25038|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|McNamara Group|11575|||Statherian|1658|3|inferred, overlying unit|eruption|Statherian|1694|3|isotopic, U/Pb-Pb/Pb ion probe|||800|QLD|Yes|34395|37459|Hutton L.J., Cavaney R.J., Sweet I.P.||Whitaker, W.|24-JUL-81|Age refined by NABRE project. Geological province: Lawn Hill Platform of Mount Isa Inlier. Also referred to as Gunpowder Formation.  In 2006, shown along with Torpedo Creek Quartzite and Warrina Park Quartzite as separate lower and upper parts, in Prize and Gun Supersequences respectively.|The dominant lithology is a laminated red and green micaceous siltstone and fine grained micaceous sandstone. Dolomite, dolomitic siltstone and leached carbonaceous shale are common toward the top of the sequence.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Gwakura Formation|7935|||||Yes|Formation, beds|Formal|Other new published name|Defined|Habgood Group|7964|||Statherian|||inferred|deposition|Statherian|||inferred, underlying unit|||600|NT|No|42597|43010|||||Age: Statherian|Sandstone: mostly fine-grained, commonly dolomitic; siltstone: dolomitic; chert (silicified carbonate): microbially laminated; tuffaceous mudstone; basal conglomerate or pebbly lithic sandstone: polymict.|siliciclastic sedimentary rock|||N||17-JAN-23
Gwynne Sandstone|27064|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Orosirian||||deposition|Orosirian|||||||NT|Yes|42643|42643|Bagas, L.|31-AUG-88|Kruse, P.D.|10-APR-90||Subarkosic, sublithic and lithic (partly volcaniclastic?) arenite and quartz arenite, commonly pebbly; minor conglomerate, greywacke and pyroclastic rocks.|medium-coarse grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
HYC Pyritic Shale Member|27791|||||Yes|Member, phase|Formal|Variation of published name|Described|Barney Creek Formation|1130|||Statherian|1640|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1690|29|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|30344||||||Within the McArthur Group. Hosts McArthur River (formerly HYC) Zn-Pb-Ag deposit. Max. age from Page (1981).|A recessive, thinly bedded, laminated, carbonaceous, dolomitic pyritic siltstone; also thin beds of tuffaceous mudstone.|fine grained siliciclastic rock|||N||17-JAN-23
Habgood Group|7964|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Statherian|1600||inferred||Statherian|1670||inferred|||5000|NT|No|44299|43010|||||Age: Statherian. Overlying unit is shown as Nathan Group in Ahmad (1998) RefID 22479.|Fine-grained siliciclastic rocks and minor dolostone.|siliciclastic sedimentary rock|||N||17-JAN-23
Habgood Group, Upper|72381|||||Yes|Subgroup|Informal|Variation of published name|Described|Habgood Group|7964|||Statherian||||deposition|Statherian||||||||No|71632||||||Informal grouping of units be used for Northern Territory 1:1 million geological map, National Maps Project.  Includes Darwarunga Sandstone, Ulunourwi Formation, Gwakura Formation.|Sandstone, dolomitic mudstone and sandstone, stromatolitic-evaporitic dolostone; minor conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Haddon Volcanics|80726|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian||||magmatic crystallisation|Statherian|1712|2|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation||100|NT|Yes|72377||Whelan, J. (NTGS)|04-AUG-18|Beyer, E.|13-NOV-18|Where to be published = By the end of 2018 and in: Whelan JA, Munson TJ, Weisheit A, Woodhead JD, Thompson J and Meffre S, 2018. Summary of Results NTGS LAICPMS U-Pb-Hf program: Arnhem Province and McArthur Basin, July 2015-June 2016. Northern Territory Geological Survey, Record. Occurs on the Blue Mud Bay map sheet. Named for Haddon Head near the town of Alyangula.|Porphyritic rhyolite consisting of K-feldspar, plagioclase and quartz phenocrysts set in a fine-grained groundmass of K-feldspar-plagioclase-quartz and iron-oxide minerals.|acid volcanic rock|||N||17-JAN-23
Hagen Member|26306|||||Yes|Member, phase|Formal|Resvd name published|Defined|Chabalowe Formation|26298|||Late Cambrian||||deposition|Middle Cambrian|||inferred, underlying unit|||160|NT|Yes|41524|41524|L.Bagas|07-MAY-86|Brakel, A.|26-NOV-86||Peritidal, grey evaporitic dolostone.  Earlier interpretation: Dolostone with gypsum beds, chert; minor claystone and fine sandstone interbeds and intraformational conglomerate.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Hale Formation|25689|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Late Eocene|||inferred, biostratigraphic correlation|deposition|Paleocene||||||75|NT|Yes|48992|48992|R.D.Shaw|01-AUG-77|Branch, C., Brown, M.|01-MAR-79|Of Hale, Ti-Tree, Waite and Aremra Basins (RefID 43748 Fig 9) and Includes: Ulgnamba Lignite Member. Kaolinitic quartzose sandstone, boulder conglomerate.|Kaolinitic, argillaceous, poorly sorted sand and gravel beds, overlain by carbonaceous shale or lignite lenses, mud- and silt- rich layers, and an upper sandy unit  (Tug Sandstone),  silicified.|siliciclastic sedimentary rock|||N||17-JAN-23
Halfway Dam formation|83369|Halfway Dam Formation|35686|||Yes|Formation, beds|Informal|Other new published name|Described||||||||||||||||||No|73086|||||||Grey-green siltstone with distinctive manganiferous olive-green interbeds of carbonate rock.||||N||17-JAN-23
Halls Creek Group|27793|Halls Creek Metamorphics|7991|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Orosirian|1850||isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1880||isotopic, U/Pb-Pb/Pb ion probe|||7000|WA|No|44317|23383|||||See also Tickalara Metamorphics.  Redefined to exclude the Ding Dong Downs Volcanics due to an unconformity. Redefined by Griffin and Tyler (1992) - Geol. of the southern Halls Creek Orogen. Intruded by Woodward Dolerite. There are inconsistencies with the age of Olympio Formation.|Pelitic and psammitic metasedimentary rocks with basaltic and andesitic to trachytic metavolcanic and metavolcaniclastic rock|medium-coarse grained siliciclastic rock|||N||01-MAY-23
Hanlon Subgroup|24304|||||Yes|Subgroup|Formal|Resvd name published|Defined|Hatches Creek Group|8139|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Orosirian|1820||inferred, lithostratigraphic correlation|||5200|NT|Yes|39900|49033|A.J.Stewart|21-OCT-83|Brakel, A.|17-FEB-84|In the Davenport Province/ Tennant Creek Inlier. Age: >1660Ma. & <1870 Ma of underlying Warramunga Group volcanics.|Fine to medium-grained quartzose and feldspathic/lithic/kaolinitic arenites, siltstone, and shale; minor coarse arenite, pebbly conglomerate, calcareous beds, and mafic lava; cross-bedding, wave and current ripple marks and mudflakes common.|siliciclastic sedimentary rock|||N||17-JAN-23
Hanson River beds|8056|Hanson River Beds|8055|||Yes|Formation, beds|Informal|Variation of published name|Defined|||||Upper Ordovician||||deposition|Late Cambrian|||||500||NT|No|36335|45148|||||Four lithological units were identified in Hanson River Beds by Kennewell and Huleatt (1980), mentioned in RefID: 12891 - where a very detailed description of their lithology is included (pp733-734). Age poorly constrained, possibly Early to Middle Ordovician.|Fine to coarse, poorly sorted and angular or well sorted and rounded sandstone, dolomite: marine and possibly fluvial|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Harajica Sandstone Member|8064|||||Yes|Member, phase|Formal|Variation of published name|Defined|Parke Siltstone|14883|||Famennian||||deposition|Famennian|||||||NT|No|31566|31566|||||Contains the greatest variety and abundance of fossil fish and hydrophyllic plants, indicating a Givetian to early Frasnian age.|A uniform succession of cross-bedded and planar-bedded, fine- to coarse-grained sandstone, with some mudclasts and rare subrounded clasts of quartzic sedimentary rocks derived from Mereenie Sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Harding Gabbro|81145|||||Yes|Formation, beds|Informal|Other new published name|Mentioned||||||||||||||||||No|71255||||||||basic intrusive rock|||Y||17-JAN-23
Hardway Granite|8085|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Kalkadoon Supersuite|30638|Orosirian||||intrusion|Orosirian|1862|3|isotopic, U/Pb-Pb/Pb ion probe||||QLD|Yes|30529|35167|Derrick G.|||26-JAN-78|Mount Isa Province. Previously shown as part of Wonga Suite. Age refined by NABRE project.|Coarse to medium granite, leucogranite, aplite, minor granodiorite|acid intrusive rock|||Y||17-JAN-23
Harry Anorthositic Gabbro|24306|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Strangways Metamorphic Complex|17395|||Statherian||||intrusion|Statherian|1787|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|9199|48992|R.D.Shaw|21-FEB-75|Branch, C., Brown, M.|01-MAR-79|Geological Province: Arunta Block (Division 1). Of the Strangways Metamorphic Complex.|Dominant rock type is a medium- to coarse-grained uralitised anorthositic gabbro, metamorphosed to granulite facies; minor metamorphosed anorthosite, quartz anorthosite, leucogabbro, gabbro, tonalite; rare pyroxenite.|metamorphosed basic igneous rock|||Y||17-JAN-23
Harts Range Metamorphic Complex|36822|Harts Range Group|8120|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Ordovician|453|2|isotopic, U/Pb-Pb/Pb ICP-MS|metamorphism|Neoproterozoic|1019|23|isotopic, U/Pb-Pb/Pb ion probe|||||No|23858||||||Was replaced by the Harts Range Group but is to be reinstated in the Illogwa Creek and Hale River 1:250 000 sheet areas. Whelan, J. (NTGS), 31-MAR-2011. Minimum age (of metamorphism)  from constituent unit Entire Gneiss (Beyer et al. 2013).|Supracrustal succession of metamudstone, metagreywacke, metasandstone, metamafic igneous rocks and calc-silicate rocks with subordinate amounts of marble and felsic gneiss.|metasedimentary rock|metamorphosed igneous rock||Y||17-JAN-23
Harts Range pegmatite|8127|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Paleozoic||||intrusion|Paleozoic||||||||No|48880||||||Age: 420-367 m.y.  Informal name, used in the absence of any other name for this unit in the 1:1 million geology of NT|Pegmatite, minor granite|acid intrusive rock|||Y||17-JAN-23
Harverson Granite|24307|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Harverson Suite|30858|Statherian|1799|3||intrusion|Orosirian|1820|7|isotopic, Sm/Nd||||NT|Yes|11884|48992|A.J.Stewart|18-JUN-74|Wells, A.T.|12-NOV-76||Coarse porphyritic leucocratic grey granite, massive (structureless), consisting of tubby phenocrysts of microcline up to 7 cm long in groundmass of microcline, plagioclase, quartz, biotite, and muscovite (the last two interleaved in places).|acid intrusive rock|||Y|S-type|17-JAN-23
Harverson Suite|30858|||||Yes|Group, Suite|Informal|STRATLEX Entry|Described|||||Mesoproterozoic|1820||||Paleoproterozoic|1820||||||NT|No|50369|||||||Intrusive suite that is fractionated, felsic, peraluminous.||||Y||17-JAN-23
Haslingden Group|8130|Haslingden Beds|8129|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1711|3|inferred, intrusive relationship|deposition|Statherian|1779|5|isotopic, U/Pb-Pb/Pb ion probe|||17000|QLD|Yes|32659|30534|Derrick G.||Staines, H.R.E.|18-MAR-76|Intruded by Sybella Granite. Lochness Fm intruded by Weberra Granite. Age: <1800Ma. See Geology of Queensland 2013, p57. MDA from Alsace Quartzite (Neumann et al. 2006).|Includes variably feldspathic and lithic sandstone, siltstone and minor conglomerate and metavolcanic rocks. Metabasalt (locally amygdaloidal), quartzite, tuff and pelitic schist epidotic quartzite, sericitic, feldspathic and quartzose rocks.|metasedimentary rock|metamorphosed basic igneous rock||N||17-JAN-23
Hatches Creek Group|8139|Hatches Creek Formation|8138|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Statherian|1790||inferred, geological correlation|deposition|Orosirian|1820||inferred, geological correlation|||10000|NT|Yes|44944|49033|Blake D.H.|01-JAN-83|Brakel, A.|16-FEB-84|Redefined 1985. See also Lexicon.  Age: c.1820Ma (Page, OZCHRON). In the Tennant Creek Inlier.|Arenite, siltstone, shale; some felsic volcanic rocks and basaltic lava at and near base.|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Hay River Formation|8195|||||Yes|Formation, beds|Formal|Unknown or process pending|Defined|Narpa Group|37962|||Middle Cambrian||||deposition|Middle Cambrian|||||||NT|No|8217|35798|||||Defined. The informal naming of constituent parts (see below) has been rationalised (Ambrose et al 2001), placing the lower 2 sections in Thorntonia Limestone and uppermost member into Arthur Creek Formation. This name was abandoned in 2007, in favour of Thorntonia Limestone and Arthur Creek Formation, but revived again in 2014, when parts were recognised to be distinctly older than Thorntonia Limestone [pers comm June 2019  Kamal Khider from conference poster - details to follow]. Composite well section - BMR Hay River 11, 11A & 11B.|Limestone and chert overlying black pyritic shale, shelly dolomite at base.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||31-JUL-23
Hayes Metamorphic Complex|27290|Hayes Complex|41989|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|48992|48992|L.Offe|20-JUL-78|Brown, M.C.|31-OCT-78||Biotite and biotite-muscovite schist, micaceous quartz metasandstone, rare amphibolite; Biotite-quartz-feldspar augen gneiss;|metasedimentary siliciclastic rock|foliated metamorphic rock||N||17-JAN-23
Hayfield Sandstone Member|83991|Hayfield sandstone member|79769|||Yes|Member, phase|Reserved|Reserved|Reserved|Cox Formation|24636|||Ediacaran|||||Neoproterozoic||||||||No|||Munson, T.|01-SEP-23|||Named after Hayfield Station in southeastern DALY WATERS 1:250,000 mapsheet.
A prominent, laterally-persistent, sandstone-dominated mappable unit within Cox Formation (superseding former 'Hayfield mudstone') in subsurface Beetaloo Sub-basin, McArthur Basin, NT. Formally defines and replaces informal 'Hayfield sandstone member' and 'Hayfield sandstone' of previous usage.
KATHERINE, LARRIMAH,HODGSON DOWNS, TANUMBIRINI, BEETALOO 1:250,000 mapsheet areas. Nearest town: Dunmarra. To be published in Munson T.J., in prep. Revision of the Neoproterozoic stratigraphic nomenclature of the Beetaloo Sub-basin, Northern Territory. Northern Territory Geological Survey, Record. Publication of revised stratigraphic names for Neoproterozoic units in Beetaloo Sub-basin has been given priority by NT Geological Survey. Publication envisaged for late 2023. New definitions are being prepared for Kiana Group, Bukalara Sandstone (to include former 'Jamison sandstone'), Cox Formation (to include former 'Hayfield mudstone'), and this unit.|Comprises interlaminated medium-grained sandstone, fine-grained sandstone, siltstone and minor intercalated claystone. Sandstone is massive, laminated and locally low-angle cross-bedded.||||N||04-SEP-23
Hayfield mudstone|79431|Hayfield Mudstone|70551|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Ediacaran|||inferred, overlying unit|deposition|Neoproterozoic|959|18|inferred, underlying unit|maximum depositional age|36.2|450|NT|No|69430||||||May be as young as Neoproterozoic and hence not part of the McArthur Basin. Known only in subsurface Beetaloo Sub-basin.  Has some reservoir potential. May act as a seal for the Jamison sandstone, sourced from the Kyalla Formation. Note that other references say these rocks have been previously included in the Chambers River Formation. NTGS advice Aug 2023 that this unit to be incorporated in the Cox Formation.|Green-grey to red-brown claystone, masssive to fissile, well-indurated, commonly silty, generally organic-poor; subordinate thinly interlaminated grey, commonly micaceous, siltstone and fine-grained sandstone. Prominent near-basal sandstone interval.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||04-SEP-23
Hayfield sandstone member|79769|Hayfield sandstone|79768|Hayfield Sandstone Member|83991|Yes|Member, phase|Invalid|Variation of published name|Fully described|Hayfield mudstone|79431|||Ediacaran|||inferred|deposition|Stenian|1092|15|inferred|maximum depositional age||||No|70968||||||See also Hayfield sandstone. to be replaced by Hayfield Sandstone Member of the Cox Formation [advice from T. Munson Aug 2023].|A prominent, laterally-persistent, interlaminated medium-grained sandstone, fine-grained sandstone, siltstone and minor intercalated claystone. The sandstone is massive, laminated and locally low-angle cross-bedded.|siliciclastic sedimentary rock|||N||07-SEP-23
Hayward Creek Formation|8199|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tomkinson Creek Group|18318|||Statherian|1780|||deposition|Statherian|1784|7|isotopic, U/Pb-Pb/Pb ion probe|||6000|NT|Yes|31637|35771|Mendum J.R., Tonkin P.C. (submitted by D.E. Gardner)|25-MAY-77|Wells, A.T.|||Lithic and sublithic arenite; feldspathic sublitharenite, pebbly sandstone; siltstone; volcanic rocks; quartzite.|siliciclastic sedimentary rock|||N||17-JAN-23
Headleys Limestone|8205|Headley Limestone|37191|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Negri Subgroup|27520|||Middle Cambrian||||deposition|Middle Cambrian||||||50|WA|No|44965|41840|||||Of the Negri Subgroup (Goose Hole Group). Ord Basin.|Grey massive to laminated limestone; minor chert and stromatolites.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Heavitree Formation|8223|Heavitree Quartzite|8225|||Yes|Formation, beds|Formal|Other new published name|Redefined|||||Tonian|||inferred|deposition|Tonian|||inferred|deposition|||NT|Yes|34186||Normington, V.J., Donnellan, N. (NTGS)|11-FEB-16|Whelan, J., Normington, V.|15-JUN-16|Probably an accidental misspelling of Heavitree Quartzite when first used, but unit redefined in 2016 from Heavitree Quartzite to Heavitree Formation due to the recognition that the rocks of the unit are silicified sandstone rather than a quartzite. Detrital zircon analysis suggests a maximum depositional age of 1050 to 1000 Ma (Camacho et al 2002, Maidment 2005, Maidment et al 2007; Kositcin et al 2014). It is thought that the Heavitree Formation sits in the Cryogenian subdivision of the Neoproterozoic (e.g. Grey 2005). Amadeus Basin, Centralian Superbasin.|Fine-, medium- or coarse-grained, planar and cross-bedded, variably feldspathic quartzose sandstone, pink, grey, pinkish-brown, purple or white weathering, and rare laminated mudstone or conglomerate intervals.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Hedleys Formation|84101|Hedleys Sandstone|77874|||Yes|Formation, beds|Formal|Variation of published name|Defined|Wild Cow Subgroup|37739|||Calymmian|1573||||Statherian|1612||||10|35|QLD|Yes|||||Munson, T. (NTGS)|01-JUN-23|See definition card for more information. Previously included in Constance Sandstone ether undifferentiated or as Hedleys Sandstone Member, then upgraded to Hedleys Sandstone.|Conglomerate and conglomeratic sandstone, which gradually fines upwards into thick-bedded, medium- to coarse-grained, strongly cross-bedded sandstone.||||N||03-OCT-23
Hedleys Sandstone|77874|Hedleys Sandstone Member|37735|Hedleys Formation|84101|Yes|Formation, beds|Superseded|Variation of published name|Fully described|Wild Cow Subgroup|37739|||Calymmian||||deposition|Calymmian|1602|22|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|35||QLD|No|67539||||||Is to replace H.S.Member (37735). Used in' Geology of Queensland' 2013, p52, 54. Of Wild Cow Subgroup, South Nicholson Group. Maximum depostional age from SHRIMP analyses. Extends into NT, where it has been renamed Hedleys Formation. Unclear why name changed.|Cross-bedded, medium to coarse-grained quartzose sandstone, scattered granule and pebble bands; pebble to cobble conglomerate lenses at base with well-rounded quartz and quartzite and subangular to subrounded chert and silicified limestone clasts.|siliciclastic sedimentary rock|||N||09-OCT-23
Helen Springs Volcanics|8256|Peaker Piker Volcanics|14976|||Yes|Formation, beds|Formal|Other new published name|Defined|||Kalkarindji Suite|75724|Middle Cambrian|508|2|isotopic, Ar/Ar|eruption|Early Cambrian|511|12|isotopic, K/Ar|||36|NT|Yes|44960|24303|||||P.D. Kruse, after Noakes & Traves 1954.  Disconformably overlain by Gum Ridge Formation and Montejinni Limestone. Thickness: 36 m excluding Muckaty Sandstone Member. Included in the Kalkarindji Suite in Oct 2009. Previously included in the Kalkarindji Volcanic Group.|Weathered vesicular basalt; minor  trachyte, microdolerite; minor dolerite;  volcaniclastic rocks; basal pebbly mudstone, conglomerate and lithic arenite.|basic volcanic rock|siliciclastic sedimentary rock|continental rift|N||17-JAN-23
Helicopter Siltstone|8259|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ediacaran||||deposition|Cryogenian||||||330|WA|No|44317|45047|||||Defn on Tech File SE/52-6.  Age considered to be ~800 Ma, Cryogenian, in 1999. More recently considered Ediacaran.|Micaceous siltstone, fine- to medium-grained sandstone, mudstone|fine grained siliciclastic rock|||N||17-JAN-23
Henschke Breccia|25946|||||Yes|Formation, beds|Formal|Other new published name|Defined|Finniss River Group|6669|||Orosirian|1850|||deposition|Orosirian|1860|||||2000|NT|No|32310|48942|||||Moyle 1:100 000 sheet area.  Removed from the Finniss River Group (pers. comm. NTGS 2005). See also informal Henschke breccia.|Coarse ferruginous sedimentary breccia and conglomerate with sandstone fragments, passing upwards into a well-bedded pebbly arenite, with a phyllite band about 120m thick.|siliciclastic sedimentary rock|||N||17-JAN-23
Hensman Sandstone|8279|||||Yes|Formation, beds|Formal|Variation of published name|Described|Carr Boyd Group|3663|||Stenian||||deposition|Ectasian||||||120||No|44363||||||Age updated by I.Sweet.|Massive, silicified white quartz sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Henwood Creek Volcanic Member|26611|||||Yes|Member, phase|Formal|Variation of published name|Described|Gumarrirnbang Sandstone|33374|||Statherian|1750|||eruption|Statherian|1800|||||10|NT|No|22574||||||Within the Kombolgie Subgroup, Katherine River Group.|Deeply weathered, massive to vesicular altered volcanics.|basic volcanic rock|||N||17-JAN-23
Hermannsburg Sandstone|8291|Hermannsburg Formation|8289|||Yes|Formation, beds|Formal|Variation of published name|Defined|Pertnjara Group|15099|||Upper Devonian|||inferred, overlying unit|deposition|Middle Devonian|||inferred, underlying unit|maximum depositional age||3000|NT|No|44342|31566||||||Poorly bedded, poorly sorted  red-brown and chocolate-brown lithic-feldspathic quartz sandstone, with a silty matrix; thick to massive beds; locally calcareous with clasts of dolostone and limestone; local pebbly sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Hermit Creek Metamorphics|8293|||||Yes|Formation, beds|Formal|Other new published name|Defined|Cosmo Supergroup|72987|||Orosirian|1855|2||deposition|Orosirian|1868|5||maximum depositional age|||NT|Yes|46676||Hammond R.L., Nisbet B.W., Etheridge M.A., Wall V.J.|28-MAY-84|Brakel, A.|28-JUN-84|Litchfield Province.  Intruded by Allia Suite. Max. depositional ages: 1875+/-4Ma, 1868+/-5Ma (Worden et al. 2008)|Pelitic and semi-pelitic schist and gneiss, sillimanite gneiss and schist, garnet-cordierite gneiss, biotite-quartz schist, quartz-mica schist, phyllite, andalusite-cordierite hornfels, massive to banded metabasites, minor quartzite|foliated metamorphic rock|||N||17-JAN-23
Hibernia Formation|27432|Hibernia Beds|8320|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Woodbine Group|20481|||Eocene|42|||deposition|Eocene|50|||||1200||No|41437||||||Grebe Sandstone Member reappears as basal Member of this unit, in Geology and mineral resources of the Northern Territory (2013).|Limestone, sandstone; minor shale and marl.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Hill of Leaders Granite|24310|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Tennant Creek Supersuite|39127|Orosirian|1845.5|2.4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1848|7|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|49033|49033|D.H.Blake|30-SEP-83|Brakel, A.|17-FEB-84|Tennant Creek / Davenport Province. Intrudes the Davenport Dacite.. Intruded by 1711.3 +/-2.2 Ma lamprophyre dyke.|Grey medium to coarse-grained muscovite-biotite granite containing abundant feldspar phenocrysts up to 5 cm across and angular to rounded fine-grained micaceous xenoliths; minor medium to coarse-grained even-grained granite, aplite, and greisen.|acid intrusive rock|||Y||17-JAN-23
Hillsoak Bore Metamorphics|8362|Hillsoak Bore metamorphics|27659|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Paleoproterozoic||||||||No|41510||||||For definition see Hillsoak Bore metamorphics (defined as an informal unit).  Possibly belongs to the Strangways Metamorphic Complex.|Biotite and garnet biotite gneiss, sillimanite gneiss; amphibolite, biotite-muscovite schist, calc-silicate rock, marble, quartzite, andalusite schist, granitic gneiss, rare garnet-cordierite-anthophyllite rock|foliated metamorphic rock|high grade metamorphic rock||N||17-JAN-23
Hinde Dolostone|39149|Hinde Dolomite|8377|||Yes|Formation, beds|Formal|Variation of published name|Described|Tolmer Group|18275|||Statherian|1700|||deposition|Orosirian|1825|||||||No|24122|||||||Dolostone, stromatolitic dolostone, dolomitic quartz sandstone and siltstone, dolomitic shale, minor limestone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Hindrance Creek Sandstone|26614|Hindrance Creek Member|8384|||Yes|Formation, beds|Formal|Variation of published name|Defined|Edith River Group|5978|||Orosirian|1825|4|inferred, overlying unit|deposition|Orosirian|1829|||||500|NT|Yes|39679||Stuart-Smith P.G.|18-JUN-83|Brakel, A.|18-JUL-83|In Needham and Stuart-Smith (1985); formerly Hindrance Creek Member (Roberts and Plumb 1965).|Brown, pink and grey, medium to coarse-grained, volcanolithic to feldspathic sandstone with scattered pebbles; quartzite near Grace Creek Granite.|siliciclastic sedimentary rock|||N||17-JAN-23
Hinkler Formation|83016|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Statherian|||inferred||Statherian|||inferred|maximum depositional age||65|NT|Yes|||Clark, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Named from Hinkler bore, 25 km to the northwest. Originaly reserved as Hinkler Conglomerate but name changed before definition approved.Type locality: Drill-hole NDIBK07 from down-hold depth 86.5 to 151.42 m. Collar at 641523mE and 7877108mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs.This unit is predominantly distinguished by its relatively young detrital zircon maximum depositional age (see below) and unique detrital zircon age spectrum obtained from a sample of arkosic sandstone at 134.10?136.00 m down-hole depth (Kositcin/Cross et al. in prep).|Upper interval (86.5-141.26 m) massive lithic arenite, arkose, pebble-cobble conglomerate, transitions to lower interval (141.26-151.42 m) of sedimentary breccia with abundant angular quartz fragments and lesser intervals of pebble-cobble conglomerate.|medium-coarse grained siliciclastic rock|||N||27-APR-23
Hobblechain Rhyolite|8388|Hobblechain Rhyolite Member|8386|||Yes|Formation, beds|Formal|Variation of published name|Defined|Tawallah Group|17902|Fagan Supersuite|31308|Statherian|1725|2|isotopic, U/Pb-Pb/Pb ion probe|eruption|Statherian|1725|2|isotopic, U/Pb-Pb/Pb ion probe||70|100|NT|No|44436|45162|||||See also Hobblechain Rhyolite Member, Hobblechain Volcanics, Hobble Chain Rhyolite Member. Contiguous and co-magmatic with  Packsaddle Microgranite.|Pink, porphyritic (K-feldspar-quartz), massive to flow-banded, spherulitic to microgranophyric rhyolite with local lithophysae, autobreccia, peperite and chlorite alteration.|acid volcanic rock|||N||17-JAN-23
Hodgson Sandstone|8410|Hodgson Sandstone Member|27800|||Yes|Formation, beds|Formal|Other new published name|Defined|Collara Subgroup|35509|||Ectasian||||deposition|Calymmian|||||7.7|266|NT|No|40701|24303|||||Unit upgraded to Formation in Arnhem Bay-Gove and Urapunga areas 1997, 1998 - as a unit of Collara Subgroup (Roper Group) in Urapunga-Roper River region. May have been downgraded again to Member in 2010 (as shown on Walhallow 1:250 000 sheet?|Quartz sandstone: grey to pink, fine to very coarse grained, medium to very thick bedded, trough cross-stratified, ripple marks, mud rip-up clasts|siliciclastic sedimentary rock|||N||06-SEP-23
Hooker Creek Formation|8468|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||161.5|NT|Yes|35231|60684|Kennewell P.J.|16-DEC-75|||Formerly included in Chewings' (1931) Winnecke Creek Tablelands formation and in Merina Beds (Milligan et al 1966).  No outcrop on TENNANT CREEK.|Red, laminated, bioturbated, micaceous dolomitic siltstone, sandstone; white, finely crystalline dolomite with algal structures in part; red-brown colour in outcrop probably due to weathering|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Horn Valley Siltstone|8493|Horn Valley Formation|8491|||Yes|Formation, beds|Formal|Variation of published name|Defined|Larapinta Group|10184|||Middle Ordovician|468||biozone|deposition|Lower Ordovician|487|12|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||429|NT|No|48863|69438|||||Probably equivalent to Indulkana Shale. Hosts the Mereenie oil and gas and Palm Valley gas fields. Has unconventional shale gas and oil potential. Originally Horn Valley Beds. Fossil assemblage is Bendigonian.|Green laminated siltstone with fine sandstone interbeds, fossiliferous limestone; mud-rich sedimentary rock containing an abundance of fossils; rich petroleum source.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Horseshoe Bend Shale|8504|||||Yes|Formation, beds|Formal|Unknown or process pending|Defined|Finke Group|6661|||Carboniferous||||deposition|Upper Devonian||||||566||No|48865|48865||||||Red-brown and green shale and siltstone. Includes halite pseudomorphs.|siliciclastic sedimentary rock|||N||17-JAN-23
Hot Spring Member|23654|||||Yes|Member, phase|Formal|Other new published name|Described|Lynott Formation|10891|||Statherian|1636|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1636|4|inferred|||350||No|39791||K.A.Plumb|28-APR-83|||Should be Hot Spring not Hot Springs. U/Pb SHRIMP depostional age: 1636+/-4Ma.Tuffaceous mudstone in Hot Springs (sic) Member gave an igneous Crystallization age. This is in ~ the middle of the Lynott Formation [AJES 47(3) p443].|Thin bedded dolomitic mudstone, dololutite and muddy dololutite with interbeds of fine to coarse grained sandstone.|carbonate sedimentary rock|acid volcanic rock||N||17-JAN-23
Howard Sand member|79309|||||Yes|Member, phase|Informal|Variation of published name|Briefly described|Darwin Formation|5253|||Lower Cretaceous||||deposition|Lower Cretaceous||||||||No|69456||||||Doyle (2001). Stated to be informally named. Variation on Howard Sand Member (74131).|Deconsolidated, clean to clayey, medium- to coarse-grained quartz sandstone lenses.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Huckitta Bore Granite|79082|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Statherian||||intrusion|Statherian|1756|3|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69383||||||Informal name?  RefID 69383. Arunta region, Aileron Province.  LA-ICPMS  U-Pb and Hf geochronology analyses. Crystallisation age. IC07JAW133. This sample shown as 'unnamed granite' from the Huckitta Bore boudin p55-58, so name may be informal. Age gven as 1750+/- 4.5 Ma on p viii for Huckitta Bore boudin.|Hypersthene granite.|acid intrusive rock|||Y||17-JAN-23
Huckitta Granodiorite|28612|||||Yes|Formation, beds|Formal|Variation of published name|Described|Entia Gneiss Complex|6207|Entia Suite|6211|Statherian|1761.9|3.1||intrusion|Statherian|1762|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|44964||||||Intrudes Harts Range Group. Crystallisation age 1762+/-3 Ma; metamorphism 1720-1680 Ma.|Granitic gneiss, foliated granodiorite, amphibolite.|acid intrusive rock|high grade metamorphic rock||Y||17-JAN-23
Huckitta Suite|79090|Huckitta Bore Igneous Suite|79083|||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||Ambulbinya Supersuite|75900|Statherian|1761|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1764|8|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||||||Eastern Arunta Region, Aileron Province. LA-ICPMS zircon dating, Hf analytical data. Weakly foliated biotite granodiorite sampled. The age reported here is within error of the SHRIMP U-Pb age of 1761+/-3 Ma reported by Maidment et al 2005, and the age of the co-magmatic Inkamulla Granodiorite. It appears that Lionel Suite rocks were previously included in Huckitta Suite.|Biotite granodiorite sampled.|acid intrusive rock|||Y||17-JAN-23
Hugh River Shale|8558|Hugh River Shale Member|32910|||Yes|Formation, beds|Formal|Variation of published name|Defined|Pertaoorrta Group|15091|||Middle Cambrian|505|||deposition|Cambrian|535|||||450|NT|No|48838|48838||||||Red-brown and grey-brown siltstone and shale, with minor thin beds of dolostone, limestone, sandstone and chert.|fine grained siliciclastic rock|||N||17-JAN-23
Hughie Sandstone|8560|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Calymmian|||||90|132|NT|No|28255|48943|||||Basis for age limits not clear. Birindudu Basin.|Cross-bedded and ripple marked, fine- to medium-grained, immature to mature quartz sandstone, locally ferruginous (reduction spots).|siliciclastic sedimentary rock|||N||17-JAN-23
Hull Granite Suite|36768|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Stenian|1075|||intrusion|Stenian|1090||||||NT|Yes|50321|65256|Edgoose, C.J. and Close, D.F.|20-NOV-01|Kruse, P.D.|21-JAN-02||Biotite-muscovite granite, weakly foliated; coarsely porphyritic biotite-muscovite-epidote-garnet granite|acid intrusive rock|||Y|A-type|17-JAN-23
Hyland Bay Subgroup|77685|Hyland Bay Sub-group|74045|||Yes|Subgroup|Formal|Resvd name published|Described|Kinmore Group|9623|||Changhsingian|||||Roadian||||||||No|69452||Edwards, D. (GA) after Gorter, J.D. 1998|21-DEC-12|||Bonaparte Basin, Petrel Sub-basin. Age: Kungurian-Ufimian to latest Permian. Includes Torrens, Pearce, Cape Hay, Dombey and Tern Formations (after Gorter et al. 2009). This version of the name is preferred by Geoscience Australia. See also information under Hyland Bay Sub-group and Hyland Bay Formation.|Mudstone, siltstone, sandstone and carbonate rocks.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Idracowra Sandstone|8643|||||Yes|Formation, beds|Formal|Other new published name|Defined|Finke Group|6661|||Carboniferous||||deposition|Upper Devonian||||||||No|48865|48865||||||White, medium to fine grained, kaolinitic quartz sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Ikuntji Metamorphics|41844|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|||Statherian||||deposition|Statherian|1656|17|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Within the Haasts Bluff Domain.  Warumpi Province. Max. age from detrital zircon dating from quartzite within Ikuntji Metamorphics. A unit interpreted to be metavolcanic within the Iwupataka Metamorphic Complex in ALICE SPRINGS has an age of 1615 +/- 11 Ma (Zhao and Bennett 1995).|Biotite-muscovite schist, quartz-muscovite schist, quartzite, rare amphibolite, calc-silicate, tremolite schist and forsterite marble|metasedimentary siliciclastic rock|||N||17-JAN-23
Ilappa Metadolerite|23660|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Mesoproterozoic|||||Paleoproterozoic|||||||NT|No|49036|49036|R.G.Warren|10-NOV-80||||Consists of two N-trending dykes containing lath-like cummingtonite in a groundmass of actinolitic hornblende, with titaniferous biotite and clinozoisite-muscovite intergrowths.|siliciclastic sedimentary rock|||Y||17-JAN-23
Illara Sandstone|8653|Illara Sandstone Member|32913|||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Late Cambrian|||inferred|deposition|Middle Cambrian|566|7|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||200|NT|No|48863|48863|||||Restricted to the Gardiner Anticline. Type locality in the Gardiner Range.|Fine- and medium-grained micaceous and feldspathic sandstone, with minor interbeds of micaceous siltstone and calcareous sandstone; moderately sorted and cross-bedded, convolute bedding and slumped cross-beds common.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Illili Suite|41845|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian||||intrusion|Statherian|1642|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Warumpi Province. Sample of gneissic Warumpi Granite from 3 km east of Papunya (23°12'46.88"S, 131°56'35.34"E) has a SHRIMP U-Pb zircon age of 1642 +/- 3 Ma. A sample of foliated Warumpi Granite from 23°11'34.19"S, 131°43'59.88"S has a SHRIMP U-Pb zircon age of 1639 +/- 3 Ma (Cross et al 2004).|Foliated medium-grained equigranular to weakly porphyritic biotite granite; gneissic porphyritic biotite granite; foliated to gneissic coarsely porphyritic biotite granite with rounded K-feldspar phenocrysts, locally with rapakivi textures|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Illoquara Sandstone|25690|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Statherian||||deposition|Statherian|||||||NT|Yes|42643|42643|Bagas, L.|08-MAY-90|Kruse, P.D.|10-APR-90|Within the Hatches Creek Group.|Quartz arenite, feldspathic/lithic arenite; minor siltstone and altered mafic lava.|siliciclastic sedimentary rock|||N||17-JAN-23
Illyabba Metamorphics|21994|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Narwietooma Suite|33045|Paleoproterozoic|1880||||Paleoproterozoic|1880||||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|22-MAY-91|||Defn card with P.Kruse (advised 2-Oct-91). Arunta Block.|Migmatitic banded biotite gneiss; minor quartzofeldspathic gneiss, sillimanite gneiss|high grade metamorphic rock|foliated metamorphic rock||N||17-JAN-23
Ilpili Dolerite|42369|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Statherian|1600||inferred|intrusion|Statherian|1633||isotopic, U/Pb-Pb/Pb ion probe|||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15).  Of the Yaya Domain, Warumpi Province.|A swarm of N-trending dolerite dykes up to 10m wide.|basic intrusive rock|||Y||17-JAN-23
Ilyaralona Granite|35319|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Pottoyu Granite Suite|33649|Stenian|1160|||intrusion|Stenian|1163|4|isotopic, Pb/Pb||||NT|Yes|50321|65256|Edgoose C.|14-FEB-00|Kruse, P.D.|21-JAN-02|Bloods Range 1:250 000 map sheet area. Age: 1163+/-4Ma (Pb-Pb zircon) Type Locality: 24 50' 15.03S, 129 20' 47E (WGS84).|Coarsely pophryitic biotite-muscovite granite containing abundant phenocrysts of euhedral pink K-feldspar, quartz and plagioclase in a biotite-, muscovite- and epidote-bearing matrix.|acid intrusive rock|||Y||17-JAN-23
Imbumbunna Granite|36767|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Hull Granite Suite|36768|Stenian|1090||inferred, geological correlation|intrusion|Stenian|1075||inferred, geological correlation||||NT|Yes|50286|65256|Close, D.F. and Edgoose, C.J.|20-NOV-01|Kruse, P.D.|21-JAN-02|Age: Geochemically grouped with granites of the 1090-1075Ma Hull Granite Suite. Type Locality: 24 53' 24.04S, 129 55' 12.57E (WGS 84).|Coarsely porphyritic biotite-muscovite-epidote-garnet granite.  Characteristic euhedral K-feldspar laths.|acid intrusive rock|||Y||17-JAN-23
Inca Formation|8675|Inca Creek Formation|8674|||Yes|Formation, beds|Formal|Variation of published name|Defined|Narpa Group|37962|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone||3|600|NT|No|34395|44210|||||Defined 1961.|Laminated pyritic siliceous shale and siltstone, chert, dark foetid limestone. Potential oil source.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Indiana Igneous Complex|79091|Indiana Walls Granite|77199|||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Cambrian|||||Cambrian|522|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|69917||||||Replaces Indiana Walls Granite of Maidment (2005).[And presumably Indiana Suite reservation?]|Granitic gneiss.|metamorphosed acid igneous rock|||Y||17-JAN-23
Ingula Migmatite|8703|Ingula Migmatite Complex|8701|||Yes|Formation, beds|Informal|Variation of published name|Described|Strangways Metamorphic Complex|17395|||Statherian|1800||inferred||Orosirian|1810||inferred|||||No|40079||||||Previously Ingula Migmatite Complex, Ingula Migmatite Suite etc. See definition card for Ingula migmatite suite.|Migmatite and felsic gneiss with lesser mafic granulite, cordierite gneiss and sillimanite gneiss.|high grade metamorphic rock|||N||17-JAN-23
Ingwallumum Granite|83370|||||Yes|Formation, beds|Informal|Other new published name|Mentioned||||||||||||||||||No|73086|||||||||||Y||17-JAN-23
Inindia beds|26630|Inindia Beds|8705|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Ediacaran||||deposition|Tonian|||||2130|2200||No|41852||||||See also Inindia Formation; Inindia Beds, Upper; and Inindia Beds, Lower. North of Woodroffe Thrust.|Quartz sandstone, medium to coarse, may be massive or well bedded, often ferruginised, sometimes quartzitic; siltstone, red, yellow or pale, often strongly ferruginised; chert and jasper layers, often structureless, sometimes breccias.|siliciclastic sedimentary rock|||N||17-JAN-23
Ininti Granite|42375|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Statherian|1688|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1691|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15). Age: 1688Ma.|Foliated, porphyritic granitic gneiss; may include syenogranitic gneiss with metasedimentary xenoliths.|metamorphosed acid igneous rock|||Y||17-JAN-23
Inkamulla Granodiorite|27437|||||Yes|Formation, beds|Formal|Variation of published name|Described|Entia Gneiss Complex|6207|Entia Suite|6211|Statherian|1756|8|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|Statherian|1773|4||||||No|44964|||||||Granodiorite-gneiss, granodiorite.|acid intrusive rock|high grade metamorphic rock||Y||17-JAN-23
Inspiration Peak Monzogranite|42097|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Frederick Suite|40071|Paleoproterozoic|1844|8||intrusion|Paleoproterozoic|1844|8||||||No|23809||||||Pluton surrounded by Dead Bullock Formation. AGSO sample ID 99496223.|Undeformed coarse- to medium-grained biotite monzogranite.|acid intrusive rock|||Y||17-JAN-23
Inverway Metamorphics|25958|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Orosirian|1850||||Orosirian|1867|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|28255|48943||||||Muscovite quartz schist, schistose silicic volcanic rocks and minor siltstone; concordant quartz veins are common and form massive quartz reefs 2-4m thick; sericitic and graphitic shale; dolomitic siltstone; quartz-graphite breccia.|metamorphosed acid igneous rock|||N||17-JAN-23
Inyalinga Granulite|42200|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Yaya Metamorphic Complex|41858|||Statherian|1638|10|isotopic, U/Pb|deposition|Statherian|1661|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|67565|67565|Scrimgeour, I.R., Close, D.F.,C.J. Edgoose, C.J.|26-NOV-04|Kruse, P.D.|26-NOV-04|Published in the informal version as Inyalinga granulite. Published in the Surface Geology of Australia, 1:1,000,000 scale - Northern Territory.SHRIMP U-Pb dating of detrital zircons from a sample of massive cordierite pelite from the type locality gives a maximum deposition age of 1661+/- 10 Ma, and metamorphic zircon rims have an age of 1638 +/- 10 Ma (Kinny 2002). Due to the degree of deformation and metamorphism and heterogeneity of rock types, it is possible that this unit may include rocks of significantly different ages.|Granulite facies calc-silicate rock, mafic granulite, massive cordierite-rich metapelite, garnet-biotite-sillimanite metapelite, quartzite, metapsammite; minor strained biotite granite, felsic migmatite and amphibolite.|high grade metamorphic rock|||Y||17-JAN-23
Irindina Gneiss|8769|||||Yes|Formation, beds|Formal|Variation of published name|Described|Harts Range Metamorphic Complex|36822|||Early Cambrian|||||Neoproterozoic||||||||No|44964||||||See also Lexicon. Geological Province: Arunta Block (Division 2). Garnet-biotite-quartz-plagioclase gneiss; amphibolite. Formerly considered Statherian age. Now considered structurally interleaved with Statherian deformed megacrystic granites.  Being replaced by Irindina Metamorphics? Hosts the Molyhil W-Mo skarn deposit. See also Yambla Gneiss (= Lower Irindina Gneiss of  Maidment 2005).|Thick sequence of garnet-biotite-plagioclase +/- sillimanite schist and gneiss, with minor layers of marble, calc-silicate and quartzite; locally migmatitic, with garnets to 15cm; intercalated with amphibolite of Harts Range Meta-Igneous Complex.|foliated metamorphic rock|high grade metamorphic rock||N||01-JUN-23
Irindina Metamorphics|79074|Irindina Gneiss|8769|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Neoproterozoic||||deposition|Neoproterozoic|882|11|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|69383||||||Of Hollis et al 2010. NTGS Record 2010-001. p74. Irindina Province, Arunta Region. Sampled for dating at eastern limit of Irindina Province. Metamorphism is higher grade to the west.Maximum deposition age for this sample is difficult to constrain, but based on the two youngest ages, appears to be about 882 ? 11 Ma. Name may have been intended to replace Irindina Gneiss, but only used once so far.|Quartz-rich metapsammitic rock in east, migmatitic further west.|metasedimentary siliciclastic rock|||N||17-JAN-23
Ironbark Member|28048|||||Yes|Member, phase|Formal|Transferred from STRATLEX Mar 1995|Described|Plum Tree Creek Volcanics|15334|David Suite|72698|Orosirian|1825|||deposition|Orosirian|1857|61|isotopic, U/Pb-Pb/Pb, TIMS|||800||No|43149||||||Edith River Group.|Interbedded greywacke, tuff, cherty tuff; flow-banded glassy pink rhyolite and porphyry; porphyritic microgranite.||||N||17-JAN-23
Iwupataka Metamorphic Complex|24318|||||Yes|Group, Suite|Formal|Resvd name published|Redefined|||||Statherian|1600||||Statherian|1650||||||NT|Yes|48992|43503|L.Offe|01-NOV-78|Brown, M.C.|31-OCT-78|Arunta Block.  Haasts Bluff Domain.  Warumpi Province. See also Iwupataka Suite. Part of source rocks for Brewer Conglomerate. See also misspelt Iwuputaka Metamorphic Complex.|Gneiss, augen gneiss, granitic gneiss, schist, quartzite|foliated metamorphic rock|||N||17-JAN-23
Jalboi Formation|30270|Jalboi Member|8842|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Collara Subgroup|35509|||Calymmian|||inferred|deposition|Calymmian|||inferred||117|230|NT|No|44112|23937|Young D.|28-SEP-06|||Within the Roper Group.|Thin bedded, fine to very fine grained sandstone (glauconitic and micaceous), red-brown mudstone and siltstone; basal red laminated siltstone; local cobble conglomerate on erosional basal contact.|siliciclastic sedimentary rock|||N||17-JAN-23
Jalma Formation|22013|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Calymmian|1613||inferred, overlying unit|deposition|Statherian|1670|10|inferred, underlying unit|maximum depositional age||130|NT|Yes|22600|24048|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Brakel, A.|01-MAR-95|Blue Mud Bay 1:250 000 map sheet. Age poorly constrained: late Palaeoproterozoic or early Mesoproterozoic. Maximum depositional age of 1720+/-10 Ma from Kositcin et al. (2017) is older than MDA for underlying unit.|Brown to purple, medium-grained, thinly to medium bedded ferruginous sandstone; fine-grained, thinly bedded sandstone near base; local basal conglomerate; upper recessive laminated claystone unit.|siliciclastic sedimentary rock|||N||17-JAN-23
Jamaica Granite|80198|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Alkara Suite|81826|Statherian|1710|4|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Statherian|1728|6|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71750||Reno, B. (NTGS)|06-SEP-17|Munson, T. (NTGS)|25-AUG-22|Map Sheet: Jinka 6052, Huckitta SF53-11. Garnet-potassium feldspar-plagioclase-quartz-biotite S-type granite. Formed from partial melting of the Kanandra Metamorphics.|Two phases:a coarser-grained porphyritic phase, and a finer-grained orthogneiss phase: garnet-potassium feldspar-plagioclase-quartz-biotite S-type granite.|acid intrusive rock|metamorphosed acid igneous rock||Y|S-type|02-JUN-23
Jamberline Sandstone Member|32187|||||Yes|Member, phase|Formal|Resvd name published|Defined|Dook Creek Formation|5617|||Calymmian||||deposition|Statherian||||||400||No|24051|23937|Sweet I.|24-FEB-98|||Flying Fox 1:100 000 sheet area (Urapunga 1:250k).  Part of Mount Rigg Group.|Medium to very thick bedded quartz sandstone; chert and sandstone clast pebble and cobble conglomerate; minor dolomitic siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Jamieson Formation|8851|||||Yes|Formation, beds|Formal|Variation of published name|Described|Bathurst Island Group|1249|||Cenomanian|95|||deposition|Aptian|125|||||1400||No|42053||||||Vulcan Graben, Timor Sea. Pattillo and Nicholls (1990). Different unit from the Jamison Sandstone (Roper Group) also in NT. lateral equivalent to Heywood Formation?|Monotonous succession of silty claystones, with occasional thin limestone or dolomite stringers.|fine grained siliciclastic rock|||N||17-JAN-23
Jamison sandstone|79432|Jamison Sandstone|69621|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Neoproterozoic|||inferred, overlying unit|deposition|Mesoproterozoic|1092|16|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||162||No|69430||||||May be as young as Neoproterozoic and hence not part of the McArthur Basin. 75-160m thick. Fair to good conventional hydrocarbon reservoirs occur; overlies Kyalla Formation source rocks and is sealed by the Hayfield mudstone. Previously correlated with/identified as Bukalorkmi Sandstone, Moroak Sandstone in various wells. New evidence (reported in Munson, 2016) shows detrital zircons are distinctly younger (late Mesoproterozoic) than the Maiwok Subgroup. See also Yang et al. (2018) for more detrital zircon age data.|structureless to cross-bedded, variably very fine- to coarse-grained quartz sandstone, containing minor, thin green-grey mudstone-rich interbeds and a thin basal conglomerate. Gradual fining upwards near top of unit.|medium-coarse grained siliciclastic rock|||N||08-SEP-23
Jamison sandstone, lower|80684|||||Yes|Member, phase|Informal|Variation of published name|Described|Jamison sandstone|79432|||Stenian|959|18|inferred, overlying unit|minimum depositional age|Mesoproterozoic|1092|16|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|71893|||||||quartz sandstone,|medium-coarse grained siliciclastic rock|||N||07-SEP-23
Jamison sandstone, upper|80685|||||Yes|Member, phase|Informal|Variation of published name|Described|Jamison sandstone|79432|||Neoproterozoic|||inferred||Tonian|959|18|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|71893|||||||Quartz sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Jammine Granite|24611|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Allia Creek Suite|39136|Paleoproterozoic|1820|||intrusion|Paleoproterozoic|1858|6|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|39679||G.M.Fahey, J.E.Fahey|18-APR-83|Brakel, A.|13-FEB-86|See also the informal Jammine granite and misspelt Jamine Granite.  In the Pine Creek Province.|Inequigranular, medium-grained, tourmaline-muscovite leucogranite. Mineralogy: quartz, microcline, subordinate coarse muscovite, minor tourmaline.|acid intrusive rock|||Y|S-type|17-JAN-23
Jangirulu Formation|38407|Tomkinson Creek beds|18320|||Yes|Formation, beds|Formal|Resvd name published|Defined|Renner Group|38406|||Ectasian||||deposition|Ectasian|||||350|845|NT|No|24304|70968|||||Reserved as Jangirulu (Hussey, 1996).|Sandstone, quartz arenite; lensing thin to very thick bedded, medium-grained to pebbly; crossbedded, rippled, graded, convolute laminated; minor conglomerate; rare mudstone, laminated, dessicated; silicified, jointed; ridge-forming.|siliciclastic sedimentary rock|||N||17-JAN-23
Jarrad Sandstone Member|8878|||||Yes|Member, phase|Formal|Other new published name|Defined|Ranford Formation|15830|||Ediacaran||||deposition|Ediacaran||||||50|WA|No|44317|45047|||||Ruby Plains 1:100 000 sheet area. Defined as Adelaidean age. Within the Duerdin Group. Ferruginous sandstone in Auvergne area. Wolfe Basin.|Dolomitic and ferruginous sandstones and quartz sandstone, siltstone and mudstone. Extremely thick massive sandstone with single beds up to 2.5m thick.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Jasper Gorge Sandstone|8883|Jasper Gorge Sandstone""|8882|||Yes|Formation, beds|Formal|Other new published name|Defined|Auvergne Group|787|||Cryogenian||||deposition|Ectasian|1322|22|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|50|130|NT|No|45022|48938|||||Previously shown as Calymmian (Mesoproterozoic). Victoria Basin. Conservative maximum deposition age of 1322 +/- 22 Ma, with two isolated grains aged 1243 Ma and 1171 Ma (Carson, 2010).|Medium grained, silica-cemented quartz sandstone/orthoquartzite, minor siltstone, basal conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Jawoyn Group|30496|||||Yes|Group, Suite|Formal|Other new published name|Briefly described||||||||||||||||||No|43187||||||Pine Creek Inlier|||||N||17-JAN-23
Jay Creek Limestone|8892|Jay Creek Limestone Member|32914|||Yes|Formation, beds|Formal|Variation of published name|Defined|Pertaoorrta Group|15091|||Late Cambrian||||deposition|Middle Cambrian|||||||NT|No|48838|48863||||||Fossiliferous limestone, shale, dolomite.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Jennings Granitic Gneiss|27291|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Jennings Suite|30859|Paleoproterozoic|1650||isotopic, U/Pb||Paleoproterozoic|1771||isotopic, U/Pb||||NT|Yes|60547|48992|R.D.Shaw|21-FEB-75|Brown, M.C.|12-JUL-78|Intrudes the Randall Peak Metamorphics.|Heterogeneous granitic gneiss, mainly coarse grained; porphyroblastic feldspar gneiss; quartzofeldspathic gneiss|foliated metamorphic rock|||Y||17-JAN-23
Jennings Suite|30859|||||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||||Statherian|1770||||Statherian|1771|9||||||No|69931|||||||Granitic gneisses, orthogneiss, granulite or metamorphics.|metamorphosed acid igneous rock|high grade metamorphic rock||Y||09-AUG-23
Jericho Granite|80340|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Fosters Suite|80343|Statherian|1774|5|||Statherian|1780|4|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|72515|72516|Beyer, E. (NTGS)|29-NOV-17|Normington, V.|01-NOV-18|Not related to informally named Jericho pegmatite. Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin.|Muscovite+/-biotite granite: fine- to medium-grained, equigranular, locally tourmaline-bearing; strongly weathered to rottenstone; moderately foliated.|acid intrusive rock|||Y|I-type|17-JAN-23
Jeromah Formation|38417|Jeromah Creek|30250|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Namerinni Group|38414|||Statherian|1640|||deposition|Statherian|1640|||||700||No|24304|24303|||||Reserved as Jeromah Creek (Hussey, 1996). Formerly undifferentiated Tomkinson Creek beds.|Pebbly sandstone; lithic to quartz arenite; lensing, thin to thick bedded; crossbedded; graded bedded; fluid escape structures; rip-up clasts; current lineated, halite pseudomorphs; micaceous mudstone, convolute laminated, rippled, desicated conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Jervois Granodiorite|80336|Jervois Granite|28624|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Casper Suite|80344|Statherian||||magmatic crystallisation|Statherian|1771|6|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|72515|72516|Beyer, E. (NTGS)|29-NOV-17|Williams, B., Normington|31-OCT-18|To be published in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin.|Biotite granodiorite, fine to medium grained, locally leucocratic metamorphic rocks?|acid intrusive rock|||Y|I-type|17-JAN-23
Jervois Suite|30860|||||Yes|Group, Suite|Formal|STRATLEX Entry|Briefly described|||||Statherian|1771|6|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1771|15|isotopic, U/Pb-Pb/Pb ion probe|||||No|69931||||||Includes Jervois Granite.|||||Y||09-AUG-23
Jessie Gap Gneiss|8949|Jessie Gap gneiss|27952|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Jessie Gap Suite|41817|Statherian|1747|9|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1747|9|isotopic, U/Pb-Pb/Pb ion probe|||||No|39888||||||Stated to be of the Hayes Complex.|Biotite-quartz-feldspar gneiss, locally muscovite-bearing.|foliated metamorphic rock|||N||17-JAN-23
Jessie Gap Suite|41817|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Statherian|1747|9|||Statherian|1750|||||||No|69931||||||Geological Province: Arunta Inlier.|||||Y||09-AUG-23
Jigaimara Formation|22033|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Goulburn Group|7636|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||470|NT|Yes|23373||Haines P.|20-DEC-94|Brakel, A.|28-FEB-95|Arnhem Bay 1:250 000 sheet area.  Previously mapped as part of the Elcho Island Formation.|Silicified, fossiliferous, white to grey-brown chert and cherty siltstone (presumably after limestone and calcareous siltstone); laminated and variably brecciated with a siliceous matrix.|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Jim Jim Granite|8956|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Jim Jim Suite|30779|Orosirian|1732|11||intrusion|Orosirian|1838|7|isotopic, U/Pb-Pb/Pb ion probe|||||No|44399||||||Pine Creek Province. RefID65232 (2006), includes this in "post-orogenic granitoids...intruded in 1840 - 1820Ma period. Suite name was changed to David Suite in 2005, but this appears not to have been widely accepted, so NTGS has reverted to Jim Jim Suite. K-U-Th rich.|White to pink, coarse, evenly-grained to porphyritic biotite leucogranite and hornblende-biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Jim Jim Suite|30779|||||Yes|Group, Suite|Formal|STRATLEX Entry|Described|||||Orosirian|1818|8|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1846|13|isotopic, U/Pb-Pb/Pb ion probe|||||No|50586||||||Pine Creek Province. Informal or not?  PP 1/05. Includes: Grace Creek, Malone and Jim Jim Granites and the volcanics of the Edith River Group and Gimbat Ignimbrite of the El Sherana Group. David Suite was intended to replace Jim Jim Suite in 2005 and on the Surface Geology of Australia 1:1,000,000 map sheet (2008), but appears not to have been accepted widely. Radiometric ages from constituent units Nabarlek Granite (1818 Ma) and Tin Camp Granite (1846 Ma).|Dominated by felsic end-members with significant fractionation. Compared with other Pine Creek Orogen felsic igneous Suites, Jim Jim Suite is predominantly oxidised. I-type granites.|acid intrusive rock|||Y|I-type|17-JAN-23
Jimbu Microgranite|32314|Jimbu Granite|27439|||Yes|Formation, beds|Formal|Variation of published name|Redefined|||Fagan Supersuite|31308|Statherian|1720|7|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1720|7|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|22538|24050|Rawlings D.|08-MAY-98|Young, D.|30-NOV-98|Previously called Mann River Porphyry (Patterson 1954) invalid due to prior use; subsequently  Jimbu Granite (Roberts and Plumb, 1965), defined by Plumb and Roberts (1992).  Now revised to Jimbu Microgranite.  Intrudes the Gundi Sandstone.|Pink-green, massive porphyritic microgranite, with aplite and pegmatite/granophyre veins and dykes.|acid intrusive rock|||Y||17-JAN-23
Jims Find Granite|42100|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Paleoproterozoic|1807|9|isotopic, Pb/Pb|intrusion|Paleoproterozoic|1807||isotopic, Pb/Pb|||||No|23809||||||Intrudes the Killi Killi Formation (Tanami Group). See also the informal Jims Find granite.|Granite.|acid intrusive rock|||Y||17-JAN-23
Jindare Formation|23669|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Kalkarindji Suite|75724|Early Cambrian||||deposition|Early Cambrian||||||208||No|39679||Needham, R.S.|01-MAR-83|||1994 Katherine 1:250 000 explan. notes say not......[what?].  Previously included in the Mesoproterozoic Stray Creek Sandstone Member (of Walpole et al 1968). See also Jindare Sandstone.|Mottled ferruginous clayey sandstone, fine to medium grained and pebbly feldspathic and quartz sandstone, laminated chert, siltstone, conglomerate, silicified carbonate breccia, calcarenite; rare evaporite pseudomorphs; commonly limonitic|siliciclastic sedimentary rock|||N||17-JAN-23
Jinduckin Formation|24641|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Daly River Group|5163|||Middle Cambrian|||inferred|deposition|Middle Cambrian|||inferred, underlying unit|||356|NT|Yes|46676|42012|Kruse P.D.|21-APR-88|Kruse, P.D.|07-APR-88|Originally Randal (1962), Malone (1962). Unfossiliferous. Previously considered to include Ordovician conodonts, trilobites, brachiopods, but these now recoginsed to be in separate Florina Formation.|Dolomitic-siliciclastic siltstone with sandstone-siltstone interbeds; dolostone; minor cryptalgal dolostone, ooid dolograinstone, dolomitic quartz sandstone; evaporite (principally anhydrite) common in siltstones and some sandstones; flat pebble breccias|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Jinka Granite|26643|||||Yes|Formation, beds|Formal|Other new published name|Redefined|||Sainthill Suite|81827|Statherian|||inferred||Statherian|1714|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|44964|48844|||Munson, T. (NTGS)|25-AUG-22||Biotite granite, locally porphyritic, minor foliated granodiorite, cream coloured.|acid intrusive rock|||Y|I-type|17-JAN-23
Jinka Suite|30861|||||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||||Paleoproterozoic|1713||||Paleoproterozoic|1713|||||||No|69931||||||Includes the Jinka Granite.|||||Y||09-AUG-23
Joey Granite|83013|||||Yes|Formation, beds|Formal|Reserved|Defined|||Mount Lamb Suite|83008|Orosirian|||inferred||Orosirian|1854.2|5.3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|||Clark, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Due to lack of available place names, a theme of juvenile animals has been used for the constituents of the Mount Lamb Suite. Type locality:Drill-hole NDIBK10, down-hold depth of 747.67 m to 756.01 m. Drilled at 593827mE and 7813094mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. Massive, equigranular, medium grained texture, characteristic of an intrusive rock, distinguish this unit from the more heterogeneous gneiss of the Alroy Formation.|Medium- to coarse-grained monzogranite, comprising plagioclase, K-feldspar, quartz, hornblende with trace zircon and tourmaline.|acid intrusive rock|||Y||31-JAN-23
Johannsen Metagabbro|24321|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Strangways Metamorphic Complex|17395|||Statherian|1696|8|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1805|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992|48992|R.D.Shaw|20-JUN-78|Branch, C., Brown, M.|01-MAR-79|See also misspelling Johansenn Metagabbro. Metamorphic age1696 +/- 8 Ma, protolith age: 1805+/-4 Ma (Claoue-Long and Hoatson, 2005)|Dykes of homogeneous coarse-grained mafic granulite, granoblastic gabbro and felsic granulite.|high grade metamorphic rock|metamorphosed basic igneous rock||Y||17-JAN-23
Johnnys Creek Formation|79262|Johnnys Creek beds|70523|||Yes|Formation, beds|Formal|Variation of published name|Defined|Bitter Springs Group|79261|||Tonian|767|130|isotopic, U/Pb|deposition|Stenian|1085|11|isotopic, U/Pb-Pb/Pb ion probe||78|400|NT|Yes|71279||Normington, V., Donnellan, N. (NTGS)|28-SEP-15|Kraus, S., Normington,V.|09-NOV-15|After Johnnys Creek beds, Johnnys Creek Member. PROPOSED PUBLICATION: Normington and Donnellan, in prep. Characterisation of the Neoproterozoic stratigraphy of the northeast Amadeus Basin, Northern Territory. Northern Territory Geological Survey Report. Age: The Bitter Springs Group has a well-constrained age of ca 820 Ma; this is based on the presence of layers of basalt in the Johnnys Creek Formation. These basalts have been geochemically correlated with the Amata Dolerite of the Musgrave Province which have a U-Pb baddeleyite age of 824 ± 4 Ma (Glikson et al 1996, Zhao et al 1992).|Red calcareous siltstone, dolomitic limestone or dolostone with siltstone, stromatolitic dolostone with occasional sandstone beds, plus rare basalt dykes.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||02-JUN-23
Joppita Bore intrusions 78215|78215|||||Yes|Formation, beds|Informal|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. No lithology stated, but said to be mafic bulk composition. Aileron province in Meixner magnetic interpretation (Meixner & Hoatson, 2004). Age inferred to be ~1810 Ma.|Mafic intrusive.|basic intrusive rock|||Y||17-JAN-23
Julie Formation|9070|Julie Member|27807|||Yes|Formation, beds|Formal|Other new published name|Redefined|||||Ediacaran|565||inferred, overlying unit|deposition|Ediacaran|575||||38|550|NT|Yes|46865||Preiss W.V., Walter M.R., Coats R.P., Wells A.T.||Wells, A.T.|01-OCT-77|Redefined by VJ Normington, N Donnellan, 30-SEP-2015. Redefinition approved 9-NOV-2015.|A widespread, relatively thin unit of dolostone, limestone (oolitic in part) and siltstone with sandstone lenses; contains sparse stromatolites.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Julie Formation, Pertatataka Formation, Pioneer Sandstone|72654|||||Yes|Subgroup|Informal|Variation of published name|Described|||||Neoproterozoic||||deposition|Neoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Julie Formation: Dolomite, limestone, sandstone. Pertatataka Formation: siltstone, shale, feldspathic sandstone. Pioneer Sandstone: Pebbly arkose, feldspathic sandstone; dolomite in places; minor conglomerate at base in places.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Junalki Formation|22045|Warramunga Group|28169|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian||||intrusion|Orosirian|1862|5||||1600|NT|No|43224|24172|Morrison R.S.|31-MAR-92|Kruse, P.D.|31-DEC-95|Used on Tennant Creek 1:100 000 map & notes.  Previously mapped as part of Warramunga Group or Unimbra Sandstone. Defined as part of the Flynn Subgroup, but this name superseded by Flynn Group in 2001, then by Ooradidgee Group. In 2001 age said to be: ~1862 Ma. Name in use in 2008, 2010 as an ungrouped unit.|Lithic/tuffaceous/volcaniclastic arenite with interbedded laminated siltstone and mudstone; rhyodacitic lava, ignimbrite, crystal-lithic tuff and lapilli tuff; chert, jaspilite and argillaceous banded ironstone; minor dacitic to andesitic lava|acid volcanic rock|siliciclastic sedimentary rock||N||10-AUG-23
Jurassic to Cretaceous sedimentary rocks 76560|76560|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Lower Cretaceous|97|||deposition|Middle Jurassic|175|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Kaidwalla Granite|72697|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Devils Suite|30736|Statherian|1707|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian||||||||No|65338||NTGS|10-NOV-06|||Bonney Well 250k sheet. See also informal Kaidwalla granite. Includes inherited zircons.|Pink, red or black alkali-feldspar megacrystic biotite granite; foliated, locally syntectonic, and locally wiborgitic or seriate porphyritic; muscovite is patchily developed and intimately associated with biotite: probably in part primary.|acid intrusive rock|||Y||17-JAN-23
Kairos member|79035|||||Yes|Member, phase|Informal|Processing pending|Briefly described|Dead Bullock Formation|35396|||||||deposition|||||||||No|69618||||||Informal name. Basal unit in Dead Bullock Formation, recognised from detailed recent DDH logging. >145m thick. Includes equally informal Marvin Beds, and Zelda, Terran and Lintilla beds.|Very fine- to fine-grained lithic, cross-laminated and slump-bedded sandstone interbedded with minor siltstone and shale; characterised by common cross-lamination and slump structures.|siliciclastic sedimentary rock|||N||17-JAN-23
Kakadu Group|9110|||||Yes|Group, Suite|Formal|Other new published name|Described|Woodcutters Supergroup|72988|||Paleoproterozoic|2020||||Paleoproterozoic|2200|||||2000||No|35140|||||||Leucogneiss, quartzite, schist.|metasedimentary siliciclastic rock|||N||17-JAN-23
Kakalyi Gneiss|37707|Kakalyi Bore intrusion 78217|78217|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Waluwiya Suite|41856|Statherian|1571|5|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1644|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|67565|67565|Scrimgeour, I.R, Close, D.F., Edgoose, C.J.|12-NOV-02|Kruse, P.D.|01-OCT-04|Named after Kakalyi Bore. Located on the Mount Liebig 1:250 000 map sheet. SHRIMP U-Pb zircon age for igneous cores of 1644 +/- 5 Ma, with metamorphic zircon rims at 1571 +/- 5 Ma.|Strongly migmatitic biotite-hornblende felsic orthogneiss. In places the migmatite grades into a weakly porphyritic biotite-hornblende granite with relatively limited migmatisation.|foliated metamorphic rock|||Y||17-JAN-23
Kalala Member|80426|Velkerri Formation, lower|40495|||Yes|Member, phase|Formal|Resvd name published|Defined|Velkerri Formation|19074|||Ectasian|1361|21|inferred, overlying unit||Calymmian|1492|4|inferred, underlying unit|maximum depositional age|8.5|305.4|NT|Yes|71779|71779|Munson, T.|19-FEB-18|Reno, B., Normington,V.|25-JUN-18|Name derived from the Kalala Station on the borders of of NE Daly Waters 250k, NW Tanumbirini 250k, SE Larimah and SW Hodgson Downs 250k mapsheets.  To be published in [provisional title] : Munson TJ, Revie D  and Edgoose CJ, 2018. Stratigraphic subdivision of Velkerri Formation, Roper Group, McArthur Basin, Northern Territory. Northern Territory Geological Survey, Record.To be released in first half of 2018.|Interlaminated grey-green to dark grey, variably carbonaceous claystone and pale grey siltstone; minor, interbedded and interlaminated, fine-grained light grey sandstone that is glauconitic, sometimes micaceous, and increasingly common towards base.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||07-SEP-23
Kalamurta gneiss|69476|Kalamurta gneissic unit|29760|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|1540||||Mesoproterozoic|1600|||||||No|61154||||||Of the 1600-1540Ma period. In the eastern Mann Ranges.|Quartzo-feldspathic gneiss; minor amphibolite,|metamorphosed acid igneous rock|high grade metamorphic rock||N||17-JAN-23
Kalkarindji Province - strongly magnetic rocks 79875|79875|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian|||inferred||Cambrian|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. See also Kalkarindji Suite.|Unknown.||||U||17-JAN-23
Kalkarindji Suite|75724|Kalkarindji Volcanic Group|69564|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Early Cambrian|505|3|isotopic, Ar/Ar|eruption|Early Cambrian|513|12|isotopic, U/Pb-Pb/Pb ion probe||60|1100||Yes|70866|69445|Glass, L.M., Munson, T.J.|06-AUG-10|Munson, T., Glass, L., Beyer E.|15-OCT-09|This will include, in part, units formerly included in the Kalkarindji Volcanic Group. Constituent units defined in both NT and WA, So no single typestate applies. GSWA has recently used Kalkarindji Supersuite for this unit. Kalkarindji Suite rocks are known to be extensive in the sub-surface.|Tholeiitic basalt, dolerite and andesite: partly vesicular or amygdaloidal; minor trachyte, microdolerite, basaltic flow breccia, peperite, pyroclastic deposits, quartz sandstone, siltstone, sedimentary breccia, limestone, chert.|basic volcanic rock|intermediate volcanic rock|intracratonic|Y||17-JAN-23
Kalkarindji Suite - altered volcanic rocks 80289|80289|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||Kalkarindji Suite|75724|Cambrian|||inferred||Cambrian|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Altered volcanic rocks.|igneous volcanic rock|||N||17-JAN-23
Kamarga Volcanics|9156|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1796|3|inferred, intrusive relationship|eruption|Orosirian|1840||inferred|||1400|QLD|Yes|36548|36548|I.P.Sweet|05-MAR-79|Whitaker, W.|09-MAY-79|Age refined by NABRE project. [numerical age previously shown as 1532 +/- 20 ie Mesoprot - source of this data unknown. All refs regard this unit asPaleoproterozoic]. Intruded by Yeldham Granite. See also Geology of Queensland 2013, p32, 58.|Vesicular, amygdaloidal and massive basalt; flow top breccias common; interbeds of feldspathic and conglomeratic sandstone.|basic volcanic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Kanandra Metamorphics|79093|Kanandra Granulite|9201|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Statherian|1731|5|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Orosirian|1818|6|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|69917||||Munson, T. (NTGS)|25-AUG-22|Central Arunta Region, Aileron Province. U/Pb SHRIMP zircon dating, Hf analytical data. Maximum depositional age for the precursor sedimentary rock: 1804+/-10 Ma. Sample may be from higher in the succession than the sample from Huckitta sheet (1844+/-8 Ma, Bodorkos et al 2013). Metamorphism from Yambah (1780-1770 Ma) and Strangways (1730-1690 Ma) Events also recorded. 1763+/-8 Ma age from mafic granulite sample (now - 2017 of Carmencita Granulite) was interpreted as the magmatic crystallisation age, but is now (2018) considered to be a metamorphic age.  The unit comprises a sequence of pelitic migmatites intruded by voluminous mafic magmas of the Carmencita Granulite (previously considered a constituent of the Kanandra Metamorphics).|Pelitic and psammitic migmatites; Mafic granulite (now Carmencita Granulite), migmatitic metapelite sampled.|high grade metamorphic rock|||N||17-JAN-23
Karinga beds|29766|Karinga Formation|22068|||Yes|Formation, beds|Informal|Resvd name published|Described||||||||||||||||||No|43035|||||||Pebble to cobble conglomerate and coarse sandstone, and has a predominantly calcareous matrix. Includes clasts of calcrete dated 77-34 Ka.|siliciclastic sedimentary rock|||N||17-JAN-23
Karns Dolostone|79433|Karns Dolomite|9292|||Yes|Formation, beds|Formal|Variation of published name|Described|Nathan Group|26072|||Calymmian|1589||inferred, geological correlation||Statherian|1613||inferred, geological correlation|||700|NT|No|69430||||||Lawn Hill Platform. See Karns Dolomite for type section location. Age range inferred form correlation with Balbirini Dolostone.|Quartz arenite and dolarenite with cross-beds and ripples; gypsum and halite casts, cauliflower chert pebble beds and chert clasts common; stromatolitic dolostone with thin interbeds of dolarenite and quartzarenite (ooids and intraclast breccia).|carbonate sedimentary rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Karukali Quartzite|35316|Karukaki Quartzite|33812|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Tjauwata Group|36772|||Stenian||||deposition|Stenian||||||10|NT|Yes|50321|65256|Edgoose C., Close D.|23-NOV-99|Kruse, P.D.|21-JAN-02|Reserved as Karukaki (Edgoose and Close 1992) - spelling now corrected. Previously described as the basal unit of the Mount Harris Basalt (Forman 1966). Type Section:  24o49' 58.95S, 129o36' 45.31E (WGS84). Overlies Musgrave basement granite.|Quartzite and quartz-muscovite schist, often rich in hematite and magnetite, minor quartz pebble conglomerate.(White crystalline quartz sandstone; rounded quartz pebble conglomerate beds; local heavy mineral layers of hematite and magnetite).|siliciclastic sedimentary rock|||N||17-JAN-23
Katherine River Group|9312|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Statherian|1720|7|inferred, intrusive relationship|deposition|Orosirian|1822|5|inferred, underlying unit|||5000|NT|No|22574|43010|||||Defined 1965, redefined 1992. With Tolmer Group, are correlatives of Birrindudu, Hatches Creek, Tomkinson Creek, and Tawallah Groups (RefID65232, p78). Unconformably overlies Nimbuwah Domain [RefID 64730, 2008].|Sandstone; minor siltstone, conglomerate, mafic to intermediate volcanics, dolostone.|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Katipiri Formation|9325|Katipiri Sand|9327|||Yes|Formation, beds|Formal|Other new published name|Described|||||Upper Pleistocene||||deposition|Chibanian||||||5||No|29673|||||||Fluviolacustrine sediments and recessional shoreline dunes.|sediment|||N||17-JAN-23
Katiti Granite|38048|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Kulpitjata Suite|42439|Mesoproterozoic||||intrusion|Mesoproterozoic||||||||No|24302|24301|||||Of the Pitjantjatjara Supersuite.  Intrudes Allanah Gneiss and Opparinna Metamorphics.|Medium-grained porphyritic biotite-hornblende granite, strongly foliated.|acid intrusive rock|||Y||17-JAN-23
Keep Inlet Formation|9368|Keep Inlet Beds|9366|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Kulshill Group|9896|||Artinskian||||deposition|Sakmarian|295|||||480||No|41839||||||See also Kulshill Formation. Age based on Kulshill Group age (RefID 64630, 2008). Coal recognised in this unit prior to 1894.|Deltaic sandstone, pebbly sandstone, mudstone, conglomerate and minor coal.|siliciclastic sedimentary rock|||N||17-JAN-23
Keepera Group|9375|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Ediacaran|||inferred, geological correlation||Ediacaran|||inferred, geological correlation||||QLD|Yes|48990|48990|M.R.Walter|27-MAY-80|Passmore, V.L.|26-MAY-80|Redefined by P.D. Kruse 31-Jan-2003.|Arkose, tillite, diamictite, dolostone, sandstone, mudstone, siltstone, shale.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Kelly Creek Formation|9394|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Toko Group|18263|||Floian|||biozone|deposition|Tremadocian|||biozone||60|290|NT|No|44358|45052|||||Defn on Tech File F/54-9 (also F/53-12, NT).  Inc: in Toko Gp rather than Cockroach Gp because of its Ordovician age and its reported local basal disconformity (Reynolds 1968, Jones et al 1971).  Part may be included in Tomahawk Fm (HUCKITTA)? Usage is different in Queensland, where clastic units form the Toko Group and the dominantly carbonate Coolibah Formation and Kelly Creek Formation are placed in the Cockroach Group instead (Geology of Queensland 2013, p94-95).|Quartzose and dolomitic quartz sandstone, siltstone, dolostone, partially dolomitised limestone, minor conglomerate.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Kellys Knob Sandstone|9402|Kellys Knob Sandstone Member|9401|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Cockatoo Group|4273|||Frasnian||||deposition|Frasnian||||||300||No|40792||||||Previously Kellys Knob Sandstone Member. Overlies Ragged Range Conglomerate, unconformably overlies Whitewater Volcanics and Halls Creek Group.|Red to orange, tabular, cross-bedded, medium-grained, pebbly quartz sandstone with conglomerate beds towards the base.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Keri Metamorphics|75947|Keri Suite|75535|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian||||magmatic crystallisation|Orosirian|1860|6|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|67232|67232|Glass, L. (NTGS)|12-MAY-11|Munson, T.,  Glass,L.,  Beyer, E., (NTGS)|12-MAY-11|Formerly included in Wangi Basics. Field contact relationships not observed, but possibly intrudes the Welltree Metamorphics (Pietsch 1989).|Metamorphosed mafic/ultramafic assemblages (metamorphosed noritic cumulate, metapyroxenite and metaperidotite) and garnet-bearing mafic amphibolite (metaferrogabbro)|metamorphosed ultramafic rock|metamorphosed basic igneous rock||Y||17-JAN-23
Kerridy Sandstone|25117|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Devonian||||deposition|Ordovician||||||700|NT|No|30258|45155|||||Latest NTGS 250K maps (eg, Mt Doreen, 1996) have age as Devonian, but very poorly constrained base age. Mount Doreen 2008 edition shows age as Palaeozoic.|Dominantly thinly- to medium-bedded, brown-red arkosic and micaceous sandstone, with abundant soft-sediment deformation structures (convolute bedding, load casts, pellet casts, slump folds; also ripple marks, cross-beds); minor interbedded mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Kerringnew Formation|83007|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Orosirian|||inferred||Orosirian|||inferred|maximum depositional age|||NT|Yes|||Clark, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Named after Kerringnew Swamp, approx. 20 km to the SE. Type section in drill-hole NDIBK04, down-hold depth from 165 to 236 m. Drilled at 635380mE and 783955.mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. Lithologically comparable to parts of the Alroy Formation. However, a detrital zircon maximum deposition age (1894.2+/- 3.4 Ma) obtained from a likely metamorphosed volcanoclastic within the upper interval of this formation is significantly older than the Alroy Formation (Cross/Kositcin et al. in prep). The unimodal age spectra obtained from this sample is also inconsistent with other detrital zircon age spectra from the Alroy Formation.|Upper interval of folded and steeply-dipping, greenish-grey and red, metamorphosed, interbedded iron-rich and siliceous sediments, with some possible volcanic (tuffaceous?) layers. Lower interval of red to light-grey and dark-green marble and skarn.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||31-JAN-23
Keyling Formation|9483|Keyling Member|22090|||Yes|Formation, beds|Formal|Resvd name published|Redefined|Kulshill Group|9896|||Artinskian||||deposition|Sakmarian|||||||NT|No|41459|67354|||||Reserved as Keyling Member by Mory, J. (1986). Gas prone.|Mainly sandstone; lesser siltstone, shale, coal, conglomerate; very minor limestone.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Kiana Group|69563|Robinson Beds|32966|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Ediacaran|||inferred|deposition|Ediacaran|||inferred, lithostratigraphic correlation|||300|NT|Yes|65337|65337|Kruse, P.D. and Rawlings, D.J.|05-AUG-05|Kruse, P.D.|05-AUG-05|Different from Kiana Granite of South Australia. New definition card from Tim Munson expected late 2023.|Thin- to thick-bedded, very fine to very coarse quartz sandstone, commonly feldspathic, some micaceous; interbedded micaceous siltstone and shale; minor shale and conglomerate.|siliciclastic sedimentary rock|||N||01-SEP-23
Kilgour Sandstone Member|9550|||||Yes|Member, phase|Informal|Other new published name|Briefly described|Mainoru Formation|11034|||Calymmian||||deposition|Calymmian|||||||NT|No|44287||||||SE53-3. See also Kilgour sandstone member.|Ripple-marked, fine- to medium-grained feldspathic sandstone and minor siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Killaloc Formation|25971|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian|||inferred, isotopic correlation|deposition|Statherian|||inferred, isotopic correlation|||104|NT|No|28255|48943|||||Age presumably from dating of tuffites in other units in Limbunya Group.|Dolostone, dolomitic siltstone, dolarenite, stromatolitic dolostone, dololutite and yellow dolomitic siltstone.|carbonate sedimentary rock|||N||17-JAN-23
Killi Killi Formation|35397|Killi Killi Beds|9559|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Tanami Group|17763|||Orosirian|1821|4|inferred, intrusive relationship|deposition|Orosirian|1848|22|inferred, intrusive relationship||4000|5000||No|50315||Hendrickx M.|11-JAN-00|||In the Tanami area. Includes the informally named Jasperlitic Chert member. Correlates with the Lander Rock beds in the Arunta region. Ages derived from tuff in underlying Callie Member (Dead Bullock Formation), and intrusive Water Tower Tonalite. Hosts gold.  Prospectivity increases where crustal-penetrating structures intersect claystone facies.|Schistose to phyllitic greywacke, siltstone and shale; minor lithic sandstone, granule conglomerate, quartzite, banded chert, basalt and dolerite. Locally contact metamorphosed to biotite zone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Kinevans Sandstone|9589|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ediacaran||||deposition|Ediacaran||||||45|NT|No|28255|48943|||||Wolfe Basin. Formerly included in the Kalkarindji Volcanic Group.|Reddish brown medium sandstone; minor calcareous sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
King Member|78971|||||Yes|Member, phase|Formal|Resvd name published|Defined|Oolloo Dolostone|24443|||Middle Cambrian|||inferred, overlying unit|deposition|Middle Cambrian|||inferred, underlying unit||58.6|160.9|NT|Yes|70380||Tickell, S.J. (NTGS)|03-OCT-14|Munson, T., Normington, V.|03-OCT-14|Middle Cambrian age is considered most likely. PROPOSED PUBLICATION: Tickell SJ, Kruse PD and Munson TJ. In Prep. Revision of the Cambrian-Ordovician succession of the Daly Basin, Northern Territory. Australian Journal of Earth Sciences.|Mostly massive; dominated by pink crystalline dolostone, coarsening upwards; minor microbial and stromatolitic dolostone and quartzic dolostone in lower parts; sparse thin shale and mudstone intervals. Widespread development of solution cavities.|carbonate sedimentary rock|||N||17-JAN-23
Kingfisher Shale|74210|Upper Milligans Formation""|18934|||Yes|Formation, beds|Formal|Other new published name|Fully described|Weaber Group|19643|||Visean||||deposition|Visean||||||||No|61542||||||Formerly referred to as Upper Milligans Formation. Overlies Utting Calcarenite with abrupt change in lithofacies.Petrel Sub-basin (Bonaparte Basin).|Slightly micaceous and carbonaceous claystone with minor siltstone and fine to very fine sandstone. A relatively well described fauna and microflora.|siliciclastic sedimentary rock|||N||17-JAN-23
Kings Legend Metadolerite|80334|Kings Legend Amphibolite Member|25973|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Casper Suite|80344|Statherian|1760||inferred|deformation|Statherian|1786||inferred, geochemical correlation|magmatic crystallisation|1|1000|NT|Yes|71621|72516|Beyer, E. (NTGS)|29-NOV-17|Whelan, J.|15-NOV-18|To be published in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. No absolute age constraints; interpreted to be coeval with Attutra Metagabbo; deformed  during regional tectonism at ca 1.76 Ga (LA¿ICP¿MS 207Pb/206Pb monazite, Reno et al 2016).|Metadolerite; fine to medium-grained, aphyric to porphyritic or glomerophyric with primary igneous textures locally preserved; rare metasomatic assemblages; undeformed to locally foliated.|metamorphosed basic igneous rock|||Y||17-JAN-23
Kinmore Group|9623|Kinmore Member|22111|||Yes|Group, Suite|Formal|Resvd name published|Fully described|||||Anisian|242||biozone|deposition|Artinskian|287||biozone|||1800||No|41459||||||Previously Port Keats Group.|Siltstone, glauconitic in part, shale, sandstone, fossiliferous limestone, rare coal.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Kiwirrkurra Formation|73692|Pollock Hills Formation|15411|||Yes|Formation, beds|Formal|Resvd name published|Described|||||Neoproterozoic|||inferred|deposition|Mesoproterozoic|1633|6|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|64580||Tyler, I.  (GSWA)|11-OCT-07|||For use on mapsheet WEBB; nearest town Kiwirrkurra. To be pub: as part of Interpreted Bedrock Geology map of WEBB 1:250K sheet/part of MACDONALD 1:250K sheet. GSWA in early 2008. Originally mapped as part of Pollock Hills Formation. North Australian Craton.  Conservative max depositional age, 1633+/-6 Ma, however depositional age could be considerably younger (Kirkland et al. 2009).|Red-weathering, lithic sandstone, quartz sandstone and conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Knuckey Formation|41964|Kookaburra Creek Formation|9765|||Yes|Formation, beds|Formal|Other new published name|Defined|Nathan Group|26072|||Calymmian|||inferred, geological correlation|deposition|Statherian|1616|7|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|No|23937|23937|||||Redefined as part of the Nathan Group below Yalwarra Volcanics - formerly the lower part of Kookaburra Creek Formation (McArthur Group).|Red-brown siltstone and mudstone; dololutite, dolomitic siltstone and sandstone|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Kombolgie Subgroup|33373|Kombolgie Formation|9736|||Yes|Subgroup|Formal|Variation of published name|Redefined|Katherine River Group|9312|||Statherian|1740||inferred, geological correlation|deposition|Orosirian|1818||inferred, underlying unit||1000|1500|NT|No|60571|23374|Carson L.J., Brakel A.T.|02-MAR-99|Beier, P.|25-FEB-99|Milingimbi 1:250 000 sheet area.  Age taken from NTGS Pine Creek Orogen solid geology GIS (1:500K).  Note that quoted Rb/Sr ages (~1648 Ma) are too young.|Conglomerate, quartz arenite; volcanic intervals in the lower part including basalt, tuff and tuffaceous siltstone.|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Koolatong Siltstone|9771|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Statherian||||deposition|Statherian||||||1800|NT|No|44299|43010|||||Formerly considered part of McArthur Group. Age: Statherian.|Mudstone: sometimes dolomitic, evaporite pseudomorphs and desiccation cracks; sandstone: fine-grained, thin-bedded, interbedded with mudstone; dolostone and limestone cycles; most of formation very recessive.|fine grained siliciclastic rock|||N||17-JAN-23
Koolendong Granite|9772|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Wagait Suite|31691|Orosirian|1850|||intrusion|Orosirian|1860|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|32310|48942|||||Pine Creek Province. Intrudes Burrell Creek Formation and Chilling Sandstone|A biotite-hornblende granodiorite and leucocratic porphyritic quartz monzonite; quartz and pegmatite veins are abundant.|acid intrusive rock|||Y|I-type|17-JAN-23
Koolpin Formation|25130|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|South Alligator Group|17111|||Orosirian|1863|2|inferred, overlying unit|deposition|Orosirian|2025|||||1000|NT|No|46678||||||Considered by some to be part of Frances Creek Group. Defined in Dunn (1962a). Hosts numerous gold deposits in addition to the Evelyn Zn-Pb-Cu-Au deposit. Also hosts an unconformity related U deposit.|Haematitic metasiltstone and phyllite with chert bands, lenses and nodules; graphitic phyllite and slate; silicified dololutite with rare stromatolites, chert breccia; minor banded iron formation and quartz metagreywacke.|metasedimentary siliciclastic rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Koolpinyah Dolostone|74950|Koolpinyah Dolomite|24341|||Yes|Formation, beds|Formal|Variation of published name|Described|Mount Partridge Group|13012|||Orosirian|2019|4|inferred, overlying unit||Orosirian||||||||No|65339||||||Variation on Koolpinyah Dolomite. Age ~2026-2500Ma. Of Mount Partridge Group. Dolomitic marble, dolomitic mica schist, mica squartz schist, dolomitic limestone, calcareous quartzite|Grey silicified dolostone interbedded with chlorite schist; dolomitic marble, dolomitic mica schist, dolomitic limestone, calcareous quartzite.|carbonate sedimentary rock|metasedimentary rock||N||17-JAN-23
Koonoonyeri Granite|72419|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1793|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|||||||NT|Yes|62642||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||Reserved as Koonooyeri, but misspelt.  Zircon dated in 2006 (pers. comm.) See UNIT DEFINITION. Locally intrudes probable Lander Rock Formation. See also misspelt Koonooyeri Granite.|Biotite granite, megacrystic k-feldspar-bearing, phyllonite, mylonite;|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Kudinga Basalt|24345|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Statherian|1790||inferred, lithostratigraphic correlation|eruption|Orosirian|1820||inferred, lithostratigraphic correlation||50|800|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project.  Within the Hatches Creek Group. See also the informal Kudinga basalt.|Basalt, basaltic andesite, mugearite, shoshonite and potassic trachybasalt lava; rarely porphyritic; commonly anygdaloidal, lateritised, epidotised and/or actinolised. Minor trachyte lava locally. Subordinate sandstones; rare siltstone, chert.|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Kudjumarndi Quartzite|9863|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Kakadu Group|9110|||Paleoproterozoic|2025||inferred, geological correlation|deposition|Paleoproterozoic|2404|16|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||150||No|35140||||||Unconformably overlies and tectonically reworked into Nanambu Complex. Conservative maximum depositional age: 2404+/-16 Ma is likely to be much older than deposition (Hollis & Glass, 2012).|Orthoquartzite, quartz gneiss, minor schist, rare cross-bedding, rare amphibolite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Kuerschner Member|38420|Kuerschner|30259|||Yes|Member, phase|Formal|Resvd name published|Defined|Morphett Creek Formation|12356|||Paleoproterozoic||||deposition|Paleoproterozoic||||||1600||No|24304|24303|||||Reserved as Kuerschner (Hussey, 1996).  ?Overlain by the Hayward Creek Formation.|Sandstone; sublithic to quartz arenite; thin to very thick bedded, medium-grained to pebbly; crossbedded, laminated, rippled, desiccated; pebbly sandstone, conglomerate, mudstone; rip-up clasts, halite pseudomorphs; rounded and dissected ridge forming.|siliciclastic sedimentary rock|||N||17-JAN-23
Kukalak Gneiss|75502|Myra Falls Metamorphics|27515|||Yes|Formation, beds|Formal|Resvd name published|Redefined|||||Neoarchean|2510|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Neoarchean|2527|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|66683|67779|Glass, L. (NTGS), Carson, C. (GA)|14-AUG-09|Munson, T., Glass, L., Beyer, E. (NTGS)|03-NOV-10|Published as Kukulak Gneiss in AGES Abstracts 2009. The contact relationships between the Kukalak and Arrarra Gneiss are not clear, due to poor exposure. A plausible relationship is that the Kukalak Gneiss protolith intruded the Arrarra Gneiss at 2530-2510 Ma and the composite granitic package was transposed and interleaved by subsequent tectonism, probably during ca. 1865 Ma tectonometamorphism.|Biotite granodioritic gneiss; minor amphibolite and sillimanite-mica schist lenses; migmatised; locally hornfelsed adjacent to Oenpelli Dolerite.|metamorphosed acid igneous rock|||Y||17-JAN-23
Kulail Sandstone|33810|Dean Quartzite|5300|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Tonian|||inferred, overlying unit|deposition|Tonian|||inferred||60||NT|Yes|50321|65256|Edgoose C., Close D.|23-NOV-99|Kruse, P.D.|21-JAN-02|Bloods Range 1:250 000 map sheet area. Type Section: 24 38' 02.97S, 129 24' 18.4E (WGS84) Age: Similar age to Dean Quartzite Age: ~850Ma. Previously included in Dean Quartzite.|Red/purple crystalline quartz sandstone, abundant trough cross-beds, local heavy mineral layers of hematite and magnetite.|siliciclastic sedimentary rock|||N||17-JAN-23
Kulampirri beds|26673|Kulampirri Beds|33207|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesozoic|||||Lower Cretaceous||||||||No|42700|||||||Patches of low-lying, massive travertine and calcrete.||||N||17-JAN-23
Kulgera Granite|39516|Kulgera Adamellite|9875|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1149|11|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Mesoproterozoic|1149|11|isotopic, U/Pb-Pb/Pb ion probe|||||No|60678|61154|Edgoose, C.|24-OCT-03|Kruse, P.D.|24-OCT-03|Age of parent supersuite: 1190-1120Ma. Intruded by the Alcurra Dolerite (Alcurra Dyke Swarm)|Porphyritic hornblende-biotite granite and quartz monzonite|acid intrusive rock|||Y||17-JAN-23
Kulpitjata Suite|42439|Kulpitjata Granite Complex|38047|||Yes|Group, Suite|Formal|Variation of published name|Described|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1135|||intrusion|Mesoproterozoic|1172|||||||No|60678||||||See also Kulpitjata Granite Complex (synonymous). Contains metamorphosed Alcurra Dolerite forming amphibolite and metagabbro. Intrudes Opparinna Metamorphics.|Variably deformed porphyritic biotite granite, minor hornblende granite|acid intrusive rock|||Y||17-JAN-23
Kulshill Group|9896|Kulshill Formation|9894|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Artinskian|287||||Bashkirian|311|||||5000||No|41459||||||Hosts oil and gas.|Friable feldspathic sandstone, siltstone, claystone, coal. Some diamictite and conglomerate. Fluvial and fan delta with glacial influence.|siliciclastic sedimentary rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Kulu Granite|33489|Olia Gneiss|14547|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Mantarurr Granite Suite|33648|Mesoproterozoic|1165|11||intrusion|Mesoproterozoic|1170||||||NT|Yes|60572|60683|Scrimgeour I., Close D., Edgoose C.|29-APR-99||27-JUL-99|Petermann Ranges 1:250 000 sheet area. SHRIMP U-Pb zircon age of c.1168 +/- 14 Ma. Of the Pitjantjatjara Supersuite.|Coarsely porphyritic foliated biotite-titanite-epidote-muscovite granite, minor aplite.|acid intrusive rock|||Y||17-JAN-23
Kunja Siltstone|9910|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian||||deposition|Statherian|1635|18|isotopic, U/Pb-Pb/Pb ion probe|||61|NT|No|28255|48943|||||Age: 1635 +/- 19Ma, presumed to be from tuffite in unit. Shown as max. deposional age in one ref. Birrindudu Basin.|Siltstone, dolomitic siltstone, mudstone; minor orange water-laid tuffite and carbonaceous mudstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Kurala Sandstone|26676|||||Yes|Formation, beds|Formal|Other new published name|Defined|Parsons Range Group|27873|||Statherian|||inferred|deposition|Statherian|||inferred|||330|NT|No|42597|43010|||||Age: Statherian. Formerly of the Habgood Group?|Quartz-rich sandstone: white to pale grey and pink, medium grained, medium to thick bedded, cross bedded to flat bedded and massive.|siliciclastic sedimentary rock|||N||17-JAN-23
Kurinelli Sandstone|24347|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1811|5|inferred, intrusive relationship|deposition|Orosirian|1840|4|inferred, underlying unit|deposition||3000|NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project. Intruded by: Treasure Suite, Devils Suite. Hosts W-Mo mineralised quartz veins in parallel or en echelon arrangments along zones of shearing.|Subarkosic/sublithic/lithic arenite, quartz arenite, siltstone; minor felsic and mafic lava and tuff, mudstone, shale, slate and schist.|siliciclastic sedimentary rock|igneous volcanic rock||N||27-APR-23
Kuriyippi Formation|9923|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Kulshill Group|9896|||Sakmarian||||deposition|Bashkirian|||||||WA|No|41459|41532|A.J.Mory|26-AUG-87|||See also misspelt Kurriyippi Formation.|A thick succession of 30-90m-thick upward-fining cycles of sandstone and lesser amounts of siltstone, shale and minor coal, overlain by glacial sandstone and conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Kurrundie Sandstone|9937|Kurrundie Sandstone Member|9936|||Yes|Formation, beds|Formal|Variation of published name|Defined|Edith River Group|5978|||Orosirian|1825|4|inferred, overlying unit|deposition|Orosirian|||||50|350|NT|Yes|30831||Stuart-Smith P.G.|13-JUN-83|Brakel, A.|13-JUL-83|Of Needham and Stuart-Smith (1985).|Purple to brown, thickly bedded to massive, coarse to pebbly lithic quartz sandstone with massive interbeds of polymictic pebble to boulder conglomerate; minor planar-laminated siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Kurt Johanssen Granite|83010|||||Yes|Formation, beds|Formal|Reserved|Defined|||Mount Lamb Suite|83008|Orosirian|||inferred||Orosirian|1838|12|isotopic, U/Pb-Pb/Pb ICP-MS|intrusion|||NT|Yes|||Schofield, A., Clark, A. (GA)|28-MAR-22|Munson, T. (NTGS)|25-NOV-22|Type section in drill-hole WNWE029, down-hold depth from 116 m to 156 m (EOH). Drilled at 641396mE and 7773092mN (MGA94 zone 53). Note: this drill-hole was drilled using reverse circulation. No drill core is available.|Strongly foliated, porphyritic, alkali-feldspar granite.|acid intrusive rock|||Y||31-JAN-23
Kyalla Formation|30268|Kyalla Member|26679|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Maiwok Subgroup|25195|||Ectasian|1324|4|inferred, intrusive relationship|deposition|Ectasian|1361|21|inferred, underlying unit||30|843.4|NT|No|64975|23937|Young D.|03-AUG-06|||Upgraded to formation within the Maiwok Subgroup (Roper River Group).  Also replaces the informal "Cat Creek member" (of the now abandoned Cobanbirini Formation). Occurs in the Beetaloo Sub-basin. Excellent hydrocarbon source rocks.[Previously shown as extending into WA, but this seems unlikely. CEB Nov-2017]|Interbedded siltstone, mudstone and very fine grained quartz sandstone.|siliciclastic sedimentary rock|||N||07-SEP-23
Lady Loretta Formation|10002|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|McNamara Group|11575|||Statherian|1644|8|inferred, overlying unit|deposition|Statherian|1647|4|isotopic, U/Pb-Pb/Pb ion probe|deposition||2000|QLD|Yes|36227|37459|R.J.Cavaney|29-JAN-76|Whitaker, W.|24-JUL-81|Age refined by NABRE project. Previously part of Paradise Creek Formation of Carter and others (1961). Hosts Lady Loretta Zn-Pb-Ag deposit. Equivalent to Loretta Supersequence.|Laminated and massive dolomite; intraclastic, oolitic and stromatolitic dolomite; ferruginous chert breccia, flaggy siltstone and fine sandstone; contains a basal breccia layer.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Lake Sarah Granite|70123|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||Crispe, A. (NTGS)|03-MAR-06|||To be used on THE GRANITES (SF52-03) map sheet.|Granite.|acid intrusive rock|||Y||17-JAN-23
Lake Surprise Granite|81929|Lake Surprise granite|70537|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Statherian|1803|4|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1803|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|71592||||||Variation (capitalisation: ?formalisation) of Lake Surprise granite (Unit no. 70537). Aileron Province, Arunta Orogen.|Megacrystic biotite granite.|acid intrusive rock|||Y||17-JAN-23
Lake Surprise Sandstone|28264|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Devonian||||deposition|Ordovician||||||200|NT|Yes|46844|45148|Kennewell P.J.|16-DEC-75|||Lithologically very similar to Dulcie Sandstone in Georgina Basin. Very poorly constrained Paleozoic age.|White sandstone grading to dark brown if ferruginised, very fine to medium grained, well rounded, well sorted, commonly bimodally sorted with silt and clay matrix in parts, silicified and/or ferruginised in places;  cross beds; slumps.|siliciclastic sedimentary rock|||N||17-JAN-23
Lake Woods beds|38405|Gum Ridge Formation|7866|||Yes|Formation, beds|Informal|Other new published name|Defined|Renner Group|38406|||Ectasian|||||Ectasian||||||250||No|24304|24303|||||Previously mapped as Cambrian Gum Ridge Formation; subsequently reassigned to Montejinni Limetone. See also Lake Wood Beds.|Sandstone, laminated to medium bedded; mudstone;  dolostone; stromatolitic biotherms, cauliflower chert, granule conglomerate; graded, evaporite pseudomorphs; rippled; crossbedded; desiccated; silicified, recessive.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Lalngang Sandstone|10097|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Fitzmaurice Group|6698|||Mesoproterozoic|1150||inferred|deposition|Mesoproterozoic|1250||inferred|||1400|NT|No|32310|48938|||||Defined in 1974. Se also Lalngang Formation. Correlates with Stonewall Sandstone, WA. Fitzmaurice Basin.|Silica-cemented quartz sandstone, commonly thickly bedded with locally abundant cross-beds and ripple marks; conglomerate, and minor siltstone. Becomes more argillaceous to the NW.|siliciclastic sedimentary rock|||N||17-JAN-23
Lamboo Complex - dolerite|72364|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Orosirian||||intrusion|Orosirian||||||||No|||||||Lithology referring to an informal unnamed unit of the Lamboo Complex to be used for Northern Territory 1:1 million geological map, National Maps Project.|Dolerite, uralitised dolerite, basalt|basic intrusive rock|||Y||17-JAN-23
Laminaria Formation|34216|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Flamingo Group|6726|||Upper Jurassic||||deposition|Middle Jurassic||||||||No|22663||||||Reservoir unit.|Sandstones.|siliciclastic sedimentary rock|||N||17-JAN-23
Lancewood Shale|10134|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Cambrian||||deposition|Cambrian||||||||No|44211||||||Of Opik (1960). In part replaced by Currant Bush Limestone, Narpa Group?.|Minor friable sandstone, leached and deeply lateritised siltstone and shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Lander Rock Formation|69780|Lander Rock beds|29263|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Statherian|1799||inferred, intrusive relationship|deposition|Orosirian|1835|6|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|61405||||||Supersedes Lander Rock beds.  Aileron Province, Arunta Orogen, North Australian Craton. Two unnamed sub-units are mapped separately: metamorphosed BIF interbedded with psammitic and pelitic schist; and felsic volcanic metasandstone and metaconglomerate interbedded with amygdaloidal metabasalt. Most outcrops are weathered to saprock: original textures and fabrics are preserved, but mineralogy has been predominantly replaced. Hosts the Anningie field pegmatite Sn deposit and the Mount Doreen field pegmatite W deposit; also hosts the Nolans Bore phosphate-REE-U deposit.|Interlayered pelitic schist and psammite, metagreywacke; gneiss; may include meta-banded iron-formation, metavolcanic rocks, amphibolite sills; greenschist to granulite facies metamorphism.|metasedimentary siliciclastic rock|||N||17-JAN-23
Landers Group|84059|Lander Group|70109|Lander Rock Formation|69780|Yes|Formation, beds|Probably misspelt|Variation of published name|Mentioned||||||||||||||||||No|||||||Experienced granulite facies metamorphism during the Strangways Orogeny.|Metasedimentary rocks.||||N||
Langfield Group|10161|Keep River Group|9373|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Tournaisian|||inferred, biostratigraphic correlation||Tournaisian|||inferred, biostratigraphic correlation|||2000|WA|No|40993|40993|G.M.Beere, A.J.Mory|21-OCT-83|||See also Langfield group. Formerly "Eight Mile Creek Group" then "Keep River Group".  See also the misspelt Langford Group.|Sandstone, limestone, shale and siltstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Langford Gneiss|10163|Langford Orthogneiss|10164|||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian||||magmatic crystallisation|Statherian|1801|8|isotopic, U/Pb-Pb/Pb ICP-MS||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|See also Langford Orthogneiss.|Porphyroblastic gneiss interlayered with schistose biotite-muscovite gneiss; granitic orthogneiss.|high grade metamorphic rock|metamorphosed acid igneous rock||Y||17-JAN-23
Langra Formation|10170|Langra Conglomerate|36820|||Yes|Formation, beds|Formal|Other new published name|Defined|Finke Group|6661|||Upper Devonian||||deposition|Upper Devonian||||||||No|48865|48865||||||Cycles of massive conglomerate beds overlain by sandstone and an upper sandy siltstone, overlain by pebbly cross-bedded sandstone; then sandy micaceous siltstone; topped by fine- to medium-grained sandstone succession with few pebbly intervals.|siliciclastic sedimentary rock|||N||17-JAN-23
Larapinta Group|10184|Larapinta Series|10187|||Yes|Group, Suite|Formal|Other new published name|Defined|||||Upper Ordovician||||deposition|Late Cambrian||||||2100||No|48838|48864|||||Average thickness of the group is 1030m; maximum of 2100m (RefID: 65233).|Marine sediments. White to red sandstone, locally bioturbated; minor siltstone and conglomeratic sandstone.|siliciclastic sedimentary rock|||N||21-MAR-23
Larranganni Formation|73328|Larranganni beds|72579|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Mesozoic|||inferred|deposition|Mesozoic|||inferred|||8|WA|Yes|64277||Bagas, L.|16-MAY-07|Hocking, R.|16-MAY-07|See UNIT DEFINTION.  Based on original description in BMR Report 174. Published on WATTS 1:100K map sheet. Considered Cretaceous in 2014, but more recently only broader Mesozoic age given.|Medium grained and thin to medium bedded quartz sandstone with minor siltstone and conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Larrie Granodiorite|41846|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Waluwiya Suite|41856|Statherian|1630||inferred, geochemical correlation|intrusion|Statherian|1645||inferred, geochemical correlation||||NT|Yes|67565|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Intrudes the Papunya Igneous Complex.|Medium grained weakly porphyritic to equigranular foliated granodiorite, with abundant xenoliths of mafic rock.  Local minor weakly strained to undeformed charnockite.|acid intrusive rock|||Y||17-JAN-23
Last Hope Gneiss|79095|||||Yes|Formation, beds|Formal|Variation of reserved name|Briefly described|Harts Range Metamorphic Complex|36822|||Neoproterozoic|||inferred||Neoproterozoic||||maximum depositional age||||No|69917||||||Underlies Yambla Gneiss. May replace the informal upper Stanovos Gniess of Maidment et al., 2013?|Gneiss.|high grade metamorphic rock|||N||17-JAN-23
Last Hope dolerite|81666|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|1811|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion||||No|72379||||||In Pioneer deposit area.||basic intrusive rock|||Y||17-JAN-23
Latram Granite|22174|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Fagan Supersuite|31308|Statherian|1712|10|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1712|10|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71606|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Comm. Territories SNSC|01-JAN-97|Sub-volcanic unit considered co-magmatic with Yanungbi Volcanics.|Massive, red, fine to medium grained, equigranular subvolcanic granite.|acid intrusive rock|||Y||17-JAN-23
Laughlen metamorphics|24355|||||Yes|Formation, beds|Informal|Resvd name published|Defined|||||Paleoproterozoic|1750||inferred||Paleoproterozoic|1770||inferred||||NT|Yes|48992||R.D.Shaw|21-FEB-75|Branch, C., Brown, M.|01-MAR-79|Formal name would be Laughlen Metamorphics. Geological Province: Arunta Block (Division 3).|Muscovite-biotite schist, thin beds of quartzite, and very rare amphibolite.|metamorphic rock|||N||17-JAN-23
Lawn Hill Formation|10261|||||Yes|Formation, beds|Formal|Other new published name|Redefined|McNamara Group|11575|||Calymmian|||inferred|deposition|Statherian|1611|4|isotopic, U/Pb-Pb/Pb ion probe||1800|2200|QLD|Yes|44280|37459|Hutton L.J., Cavaney R.J., Sweet I.P.||Whitaker, W.|24-JUL-81|Defined 1961, redefined 1981. Defn on Tech File E54-9. Age refined by NABRE project.  The upper section of the formation hosts the Century mine. This formation is split|Sandstone and conglomeratic sandstone; flaggy tuff and tuffaceous siltstone; carbonaceous shale, micaceous siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Lawn Supersequence|40579|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Statherian|||inferred, overlying unit||Statherian|1616|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|70897||||||Maintains relatively tabular architecture throughout deposition. Includes part of the Lawn Hill Formation.|Grey to black carbonaceous shale and siltstone, greenish grey tuff and tuffaceous siltstone, micaceous lithic sandstone and conglomeratic sandstone.|sedimentary rock|||N||17-JAN-23
Leaky Norite|75721|||||Yes|Formation, beds|Reserved|Reserved|Defined|||||Statherian|1748|5|inferred, intrusive relationship|intrusion|Statherian|1780|116|isotopic, Sm/Nd model age||||NT|Yes|||Donnellan, N. (NTGS)|06-AUG-10|Munson, T., Glass, L., Beyer, E., Green, M.|03-NOV-10|The age of the unit is constrained by magma mingling with the Bruna Gneiss. PROPOSED PUBLICATION: Whelan JA, Hallett L and Close DF, in prep. Quartz, Northern Territory. 1:100 000 Geological Map Series Explanatory Notes, 5951. Northern Territory Geological Survey, Darwin.|Coarse-grained, layered olivine-norite and olivine-gabbronorite.|basic intrusive rock|||Y||17-JAN-23
Ledan Schist|10289|||||Yes|Member, phase|Formal|Other new published name|Defined|Deep Bore Metamorphics|23539|||Statherian|1730|4|inferred, geological correlation|deposition|Statherian|1775||isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|33102||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|Geological Province: Arunta Block (Division 3). Pegmatite crystallisation 1730 +/- 4 Ma.[appears to be pegmatite intruding Mendip Metamorphics, which are correlated with Ledan Schist - see Maidment et al 2005]. Downgraded from Formation to Member of Deep Bore Metamorphics in 2022.|Quartz-mica schist, metamorphosed rhyodacitic volcanics; quartzite; minor cherty tuff and conglomerate; amphibolite|metamorphosed acid igneous rock|metasedimentary rock||N||17-JAN-23
Lees Sandstone|10294|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Lower Cretaceous||||deposition|Jurassic||||||||No|44213|||||||Cross-bedded sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Legune Formation|10303|||||Yes|Formation, beds|Formal|Other new published name|Defined|Fitzmaurice Group|6698|||Mesoproterozoic|1150||inferred|deposition|Mesoproterozoic|1250||inferred|||600|NT|No|32310|48938|||||Fitzmaurice Basin. Correlates with Pincombe Formation, WA.|Silica cemented quartz sandstone, siltstone, shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Leila Sandstone|25162|Leila Sandstone Member|10321|||Yes|Formation, beds|Formal|Variation of published name|Defined|Umbolooga Subgroup|18813|||Statherian|1639|6|inferred, overlying unit|minimum depositional age|Statherian|1648|3|inferred, underlying unit|maximum depositional age|10|30|NT|No|30272|45162||||||Dark grey-weathering dolomitic sandstone; fine- to coarse-grained, poorly-sorted, thinly to medium bedded, commonly cross-bedded and rippled; thin interbeds of sandy dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Leisler Metamorphics|42373|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|Yaya Metamorphic Complex|41858|||Statherian|||||Statherian|1704|3|inferred|||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15).|Cordierite-sillimanite-biotite pelitic migmatite; minor metapsammite, foliated quartz diorite and cordierite-biotite S-type granite|high grade metamorphic rock|acid igneous rock||Y|S-type|17-JAN-23
Lena Quartzite Member|10337|||||Yes|Member, phase|Formal|Other new published name|Defined|Eastern Creek Volcanics|5911|||Statherian|1650|||deposition|Statherian|1779|4|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000|QLD|Yes|34499|30534|Derrick G.||Staines, H.R.E.|18-MAR-76|Within the Haslingden Group. Max. depositional age from detrital zircons.|Feldspathic quartzite, orthoquartzite with rare pebbles.|metasedimentary siliciclastic rock|||N||17-JAN-23
Lennee Creek Formation|24357|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Hanlon Subgroup|24304|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Orosirian|1826|36|inferred|||1500|NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project.  Within the Hatches Creek Group.|Shale, siltstone, lithic/feldspathic sandstone; minor quartz sandstone, mudstone and claystone. Fine-grained rock types are variably micaceous; calcareous beds and chert concretions locally. Probably gypsiferous locally.|fine grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Leprechaun Gneiss|79065|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|Harts Range Metamorphic Complex|36822|||Ordovician|488|9|isotopic, U/Pb-Pb/Pb ICP-MS|metamorphism|Neoproterozoic|544|11|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|69917||||||Published in Beyer et al. (2013), RefID 69917. Name often shown in quotes, suggesting informal use intended. Eastern Arunta Region, Irindina Province.  U/Pb LA-ICPMS zircon dating, Hf analytical data. U-Pb isotopic data indicate a maximum depositional age of 544 +/- 11 Ma for the sedimentary protolith of the Leprechaun Gneiss and maximum age of metamorphic zircon: 488 +/- 9 Ma (Larapinta Event).|Layered quartz-hornblende gneiss.|metasedimentary siliciclastic rock|||N||17-JAN-23
Lewin Springs Syenite|23724|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Paleoproterozoic|1825|||intrusion|Paleoproterozoic|||||||NT|No|40168||Needham, R.S.|27-APR-84||||Porphyritic quartz syenite, quartz microsyenite, syenite, microgranite, microleucogranite, quartz micromonzonite, microleucomonzonite|intermediate intrusive rock|acid intrusive rock||Y||17-JAN-23
Lewis Granite|10363|||||Yes|Formation, beds|Formal|Other new published name|Redefined|||Grimwade Suite|40137|Statherian|1684|8|isotopic, Rb/Sr|intrusion|Orosirian|1820||||||WA|No|44998|45140|||||Tanami Province. Defn on Tech File F/52-2. Within the Lamboo Complex. Chemical parent (Frederick Suite) is I-type. Lewis Granite appears to have been moved into Grimwade Suite in 2013 NTGS Publicaiton 5 p11:12.|Muscovite and biotite monzogranite, magnetite-bearing monzogranite, porphyritic in places, with minor pegmatite, aplite and minor biotite granodiorite.|acid intrusive rock|||Y|I-type|09-JUN-23
Lewis Range Sandstone|10365|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Redcliff Pound Group|15983|||Tonian|810||inferred|deposition|Tonian|916|43|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|20|1000|WA|Yes|29817|45140|Blake D.H.|15-MAR-73|||Part of extensive sand blanket including Mount Kinahan Sandstone, Vaughan Springs Quartzite, Heavitree Quartzite and Townsend Quartzite. Previously considered part of Redcliff Pound Group, but see 2017 redefinition. For recent update see: Haines, P.W., Allen, H.J. 2016. The Murraba Basin: another piece of the Centralian Superbasin jigsaw puzzle falls into place IN GSWA 2016 extended abstracts: promoting the prospectivity of Western Australia: Geological Survey of Western Australia, Record 2016/2, p. 31-35.|Cross bedded and rippled medium to fine grained quartz sandstone with shale pellet layers in places; minor shale, siltstone, limestone and chert with conglomerate and sublithic sandstone near the base.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Liddle Formation|79225|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Winnall Group|79223|||Cambrian|||inferred, geological correlation|deposition|Ediacaran|||inferred, geological correlation||||NT|Yes|72369||Normington, V. (NTGS)|01-SEP-15|NT SNSC|09-MAR-17|Map Sheet: HENBURY SG53-1, 5348. To be published: 2nd Edition Henbury 250K geology map and associated explanatory notes, release 2018, also Donnellan N and Normington VJ, 2017. Towards a stratigraphy for the Neoproterozoic and probable early Cambrian in the central Amadeus Basin, Northern Territory: in Annual Geoscience Exploration Seminar (AGES) Proceedings, Alice Springs, Northern Territory 28¿29 March 2017. Northern Territory Geological Survey, Darwin.|Sandstone: feldspathic, subarkosic, arkosic and minor quartzic sandstone at the type locality, indicating variable maturity. Cycles of medium and thick beds that are cross bedded.|siliciclastic sedimentary rock|||N||17-JAN-23
Ligertwood beds|29411|Ligertwood Beds|10390|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Permian||||deposition|Carboniferous||||||||No|67856||||||See Ligertwood Beds for bibliographic references containing DEFINITION.|Breccia, conglomerate, conglomeratic sandstone and sandstone; limestone and dolomite clasts and a secondary travertine matrix are common near the base|siliciclastic sedimentary rock|||N||17-JAN-23
Lilyarba Mafics|75948|Collah Suite|75723|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian|1829|4|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|||||||NT|Yes|67232|67232|Glass, L., Munson, T. (NTGS)|12-MAY-11|Munson, T., Glass, L., Beyer, E., Green, M. (NTGS)|03-NOV-10|Previously part of Wangi Basics. Used in the Mafic-Ultramafic Event Series dataset 2013. Worden et al (2008) NTGS Record 2008-003 reported a 207Pb/206Pb SHRIMP zircon age of 1829 +/-4 Ma [from a sample of  Wangi Basics described as "a stock-like intrusion in central Wingate Mountains... a fine-medium grained quartz-bearing diorite"]. Note: this sample description is at odds with the description of the Lilyarba Mafics, so may possibly provide a minimum age (intrusive unit), rather than an age of the Lilyarba Metamorphics.|Possible altered lamprophyre; mineralogy dominated by sericitised plagioclase (labrodorite, andesine) and hornblende, and minor biotite and opaque minerals|exotic composition igneous rock|||Y||17-JAN-23
Limbla Member|26689|||||Yes|Member, phase|Formal|Other new published name|Defined|Aralka Formation|524|||Cryogenian|658|5|inferred, underlying unit|deposition|Mesoproterozoic|1018|23|isotopic, U/Pb-Pb/Pb ion probe|deposition|23|305||Yes|48890|48890|||Revie, D., Normington, V.|09-NOV-15|Originally of Prichard and Quinlan (1962). Amadeus Basin. Redefined by VJ Normington, N Donnellan 29-OCT-2015. The depositional age(658 Ma) is inferred from Re-Os dating of  the (lower part of?) Aralka Formation in Wallara 1. The youngest detrital zircons (1018+/-23 Ma) are likely from the Musgrave Province.|Festoon cross-laminated sandstone in upper part; sandy calcarenite in lower part.|siliciclastic sedimentary rock|||N||17-JAN-23
Limbunya Group|10414|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Statherian|1635||isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1640||isotopic, U/Pb-Pb/Pb ion probe||400|1300|NT|No|32699|48943|||||Age originally given as Adelaidean or Carpentarian. Includes the former "Kirkimbie Beds".  Age: 1640-1635Ma (SHRIMP U-Pb, tuffaceous rock, Smith et al 2001), probably from Kunja Siltstone in middle of Group, so age range for whole group may be greater than shown, but overlying Wattie Group has max age Statherian. Birindudu Basin.|Dolostone, siltstone, dolomitic siltstone, dolarenite, quartz arenite, sublitharenite, mudstone, diamictite, tuff.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Limmen Sandstone|10424|Mallison Sandstone|11118|||Yes|Formation, beds|Formal|Variation of published name|Defined|Collara Subgroup|35509|||Calymmian||||deposition|Calymmian|||||15|130|NT|No|44436|23937|||||Previously mapped as Canopy Rock Sst (in URAPUNGA), Mallison Sst and lower Wigram Fm (Malay Road Gp), and part of Baralminar beds.  All these now superseded by Limmen Sst (Roper Gp). Formerly also included rocks now mapped as Mantungula Fm. McArthur Basin.  Occurs in the Beetaloo Sub-basin.|Fine to very coarse sandstone; pebble to boulder conglomerate containing clasts of chert (chertified carbonate), quartzite and siltstone. Minor micaceous siltstone.|medium-coarse grained siliciclastic rock|||N||07-SEP-23
Linnekar Limestone|10441|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Negri Subgroup|27520|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||40||No|44965||||||Within the Goose Hole Group.|Stromatolitic and fossiliferous limestone and calcareous shale, local chert.|carbonate sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Lionel Suite|79064|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Statherian||||magmatic crystallisation|Statherian|1771|10|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||||||Published in Beyer et al. (2012), RefID 69917. Indexing in progress. ?Previously included in Huckitta Suite? Of Ambulbinya Supersuite?, Eastern Arunta Region, Aileron Province. Sample p143 previously included in 'Entia Gneiss Complex'. U/Pb LA-ICPMS zircon dating, Hf analytical data. Age of some samples difficult to interpret. Intrudes Harts Range Metamorphic Complex?|Includes metagabbro, foliated biotite granite, mafic amphibolite, hornblende-biotite granodiorite, granitic gneiss.|metamorphosed acid igneous rock|acid intrusive rock||Y||17-JAN-23
Litchfield Complex|10466|Litchfield Complex""|10465|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Orosirian|||||Orosirian||||||||No|44314|44314|||||Used in 'Province' sense in 2008 [RefID 64730].|Granite, granodiorite, pegmatite, migmatite.|acid intrusive rock|high grade metamorphic rock||N||17-JAN-23
Littlers Pegmatite|22206|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Mesoproterozoic||||intrusion|Mesoproterozoic|||||||NT|Yes|43225|43503|Shaw R.D.|22-MAY-91|||Arunta Block. Defn with State Convenor, Oct 91. Problems with spelling and source of name.|Coarse-grained muscovite-bearing pegmatite.|acid intrusive rock|||Y||17-JAN-23
Liverpool Breccia|31284|Liverpool Impact Breccia|31239|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Cretaceous|||||Paleoproterozoic||||||50|NT|Yes|23374|23374|Brakel A.|01-APR-97|Young, D.|30-APR-97|Milingimbi, SD53-02 sheet area. Impact breccia of the Liverpool Crater. Age uncertain, in the range Palaeoproterozoic to Cretaceous.|Two distinct breccia units. Authigenic breccia, and allogenic breccia.||||N||17-JAN-23
Lizard Schist|41847|||||Yes|Formation, beds|Formal|Other new published name|Defined|Iwupataka Metamorphic Complex|24318|||Statherian|1590||inferred, structural relationship|metamorphism|Statherian|1657|28|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Within the Haasts Bluff Domain. Warumpi Province. Maximum deposition age from SHRIMP U-Pb detrital zircons.|Muscovite-biotite-quartz schist interlayered with quartz-muscovite metapsammite, with varying degrees of tourmalinisation; rare quartzite and garnet-bearing schist.|metasedimentary siliciclastic rock|||N||17-JAN-23
Ljiltera Member|10515|||||Yes|Member, phase|Formal|Other new published name|Defined|Hermannsburg Sandstone|8291|||Upper Devonian||||deposition|Upper Devonian|||||||NT|No|31566|31566|||||Formerly considered to occur in SA also (in Warburton Basin area). Within the Pertnjara Group.|Medium- to coarse-grained pebbly sandstone and sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Lloyd Creek Formation|10524|||||Yes|Formation, beds|Formal|Other new published name|Defined|Auvergne Group|787|||Cryogenian||||deposition|Cryogenian||||||162|NT|No|32310|48938||||||Oolitic and microbial dolostone, quartzitic and silty dolostone, sandstone, dolomitic siltstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Lloyd Gabbronorite|77878|Mount Lloyd Gabbro|75598|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||||Devonian|409|9|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Devonian|411|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|69917||Whelan, J. (NTGS)|04-JUN-13|Kraus, S., Normington,V.|10-SEP-14|Variably deformed gabbro and gabbronorite intruding the Neoproterozoic to Palaeozoic Irindina Province. To be published: Quartz 100k explanatory notes. Illogwa Creek SF53-15,  1:250 000 sheet area. Age from AGES 2010abstract, p30.|Medium- to coarse-grained olivine gabbronorite and olivine gabbro.|basic intrusive rock|||Y||17-JAN-23
Lochness Formation|10558|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Myally Subgroup|13635|||Statherian||||deposition|Statherian|1650|||||1200|QLD|Yes|30534|30534|Derrick G.|21-APR-75|Staines, H.R.E.|18-MAR-76|Age refined by NABRE project. Within the Haslingden Group. Intruded by Weberra Granite. Age stated as c.1775-1755 Ma in 2008 paper [refID 64726].|Red beds with minor amounts of intercalated dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Log Cabin Granite|75895|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||||||magmatic crystallisation||524|3|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|Garnet-biotite granite; biotite gneiss. S-type granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Longsight Sandstone|10640|||||Yes|Formation, beds|Formal|Unknown or process pending|Defined|||||Lower Cretaceous||||deposition|Jurassic||||||||No|44543|44291|||||Subsumed into Hooray Sandstone, together with the Tarlton Formation (Mond and Harrison, in Senior et al 1978) in Tobermorey sheet area, NT, but appears to be still in use in Qld in 2007. Generally considered Early Cretaceous, but both old and recent references indicate a Jurassic maximum age.|Sandstone, ferruginous sandstone, conglomerate, some siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Looking Glass Formation|10647|||||Yes|Formation, beds|Formal|Other new published name|Defined|Batten Subgroup|1257|||Statherian|1615||inferred|deposition|Statherian|1620||inferred|||140|NT|No|44287|45162|||||Defn on Tech File E/53-3. Within the McArthur Group.|Stromatolitic dolostone; dolarenite and sandy dolarenite.Chert, chert-breccia.Shallow-water carbonates c.100m thick that are everywhere (outcrop and drill hole) intensely silicified.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Loretta Supersequence|40580|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Statherian|1645||||Statherian|1655|||||||No|66844||||||Includes Lady Loretta Formation.|Mixed succession of carbonates and siliciclastics. Basal conglomerate, interbedded sandstone and siltstone with evaporites, oolitic and stromatolitic carbonates with thin green shales.|sedimentary rock|||N||17-JAN-23
Lothari Hill Sandstone|10668|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Middle Cambrian||||deposition|Middle Cambrian||||||94|NT|Yes|35231|45148|Kennewell P.J.|16-DEC-75|||Formerly included in Chewings' (1931) Winnecke Creek Tablelands Formation and in Merrina Beds (Milligan et al 1966).|Red-brown laminated claystone; white fine-grained angular sandstone; tidal deposits.|siliciclastic sedimentary rock|||N||17-JAN-23
Lovely Hill Schist|22219|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|43225|43503|Shaw R.D., Wakelin-King G.A.|22-MAY-91|||Defn card with State Convener (advised 2-Oct-91). Arunta Block.|Muscovite-biotite schist, schistose garnet-biotite gneiss; rare sillimanite-staurolite schist; fine quartzofeldspathic gneiss|metasedimentary siliciclastic rock|||N||17-JAN-23
Loves Creek Formation|79260|Loves Creek Member|10686|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Bitter Springs Group|79261|||Tonian|||inferred, overlying unit|deposition|Tonian|||inferred|||200|NT|Yes|71279||Normington, V., Donnellan, N. (NTGS)|28-SEP-15|Kraus, S., Normington, V.|09-OCT-15|Redefinition of unit/upgrade from member to Formation. PROPOSED PUBLICATION: VJ Normington and N Donnellan, in prep. Characterisation of the Neoproterozoic stratigraphy of the northeast Amadeus Basin, Northern Territory. Northern Territory Geological Survey Report.  The contact of the Loves Creek Formation with the overlying Johnnys Creek Formation is conformable.|Predominantly stromatolitic dolostone and intercalations of chert, dolostone and minor limestone.|carbonate sedimentary rock|||N||17-JAN-23
Lucas Formation|10840|Lucas Beds|10838|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Paleozoic|||inferred|deposition|Devonian|410||inferred|||1000|WA|Yes|29809|45140|Blake D.H.|30-OCT-06|||Replaces Lucas Beds and Lucas beds.|Purplish to grey, medium- to fine-grained friable calcareous sandstone; medium- to coarse-grained non-calcareous sandstone (lithic to sublithic arenite); thin-bedded to laminated siltstone and mudstone; local thin limestone beds and sandy dolomite.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Lucy Gabbro|79066|Mount Lucy Granulite|75786|||Yes|Formation, beds|Formal|Variation of reserved name|Briefly described|||||Statherian||||intrusion|Statherian||||||||No|69917||||||Published in Beyer et al. (2012), RefID 69917. Central Arunta Region - Aileron Province. U/Pb LA-ICPMS zircon dating, Hf analytical data. Mafic intrusion took place during the 1780-1770 Ma Yambah Event.|Two pyroxene mafic granulite characterised by a fine-grained granoblastic assemblage of plagioclase, orthopyroxene, hornblende, clinopyroxene and quartz|high grade metamorphic rock|||Y||17-JAN-23
Lyell Brown Granite|42372|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15). Intrusive rocks of the 1640-1630Ma era.|Coarse-grained, weakly foliated porphyritic biotite granite with coarse tabular to rounded grey K-feldspar phenocrysts|acid intrusive rock|||Y||17-JAN-23
Lynott Formation|10891|||||Yes|Formation, beds|Formal|Other new published name|Defined|Batten Subgroup|1257|||Statherian||||deposition|Statherian|||||||NT|No|44434|45162|||||Defn on Tech File E/53-3.  Within the McArthur Group. Tuffaceous mudstone in Hot Springs Member was dated. this is in ~ the middle of the Formation. Good hydrocarbon source rock potential.|An evaporite-rich unit of mainly dolomitic siltstone, dolarenite, stromatolitic dolostone and lesser dolomitic sandstone.|carbonate sedimentary rock|||N||17-JAN-23
MacFarlane Granodiorite|42108|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Inningarra Suite|41160|Paleoproterozoic||||intrusion|Paleoproterozoic|1809|8|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|23809||||||Informal term referring to granodiorite in the MacFarlane Peak Group/Dead Bullock Formation? Place name is Macfarlanes Peak Bore.||acid intrusive rock|||Y||17-JAN-23
Mackunda Formation|10952|Mackunda Beds|10951|||Yes|Formation, beds|Formal|Variation of published name|Defined|Manuka Subgroup|11215|||Cenomanian||||deposition|Albian|||||30.5|275|QLD|No|44417|44417|||||Defined 1965 Neales River Group (see Strzelecki 1:250k map (1994) and explan notes (1995)).  Now defined as part of Manuka Subgroup in the Rolling Downs Group.|Pale grey-green, interbedded, glauconitic cross-bedded sand, silt, shale and calcareous shale. Local ferricrete capping.|siliciclastic sedimentary rock||intracratonic|N||17-JAN-23
Madderns Yard Metamorphic Complex|29769|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1650||||Statherian|1688|14|||||NT|Yes|43225|43503|Shaw R.D., Warren R.G.|11-OCT-95|||Accidentally published as Madderns Yard Granite. Hermannsburg 1:250 000 sheet area. Also referred to as Madderns Yard Suite, Madderns Yard Complex.|Migmatitic quartzofeldspathic gneiss, foliated granite, minor paragneiss, amphibolite.|high grade metamorphic rock|||N||17-JAN-23
Madderns Yard Metamorphic Complex - granite|72658|||||Yes|Formation, beds|Informal|Variation of published name|Described|Madderns Yard Metamorphic Complex|29769|||Statherian||||intrusion|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Foliated biotite granite, variably porphyritic, locally hornblende-bearing|acid intrusive rock|||Y||17-JAN-23
Madderns Yard Suite|33044|||||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||||Paleoproterozoic|1680||||Paleoproterozoic|1680|||||||No|50369||||||Used in Proterozoic Granites project. Also referred to as Madderns Yard Metamorphic Complex.|||||Y||17-JAN-23
Mahony Group|23749|||||Yes|Group, Suite|Formal|Resvd name published|Fully described|||||Frasnian|||||Frasnian||||||1000||No|41840||Trendall, A.F.|12-APR-83||||Quartz sandstone, pebbly sandstone and pebble to boulder conglomerate.|siliciclastic sedimentary rock|||N||21-MAR-23
Maidjunga Member|22242|||||Yes|Member, phase|Formal|Resvd name published|Defined|Fagan Volcanics|24971|||Statherian|1706|10|inferred, overlying unit|deposition|Statherian|1707|12|isotopic, U/Pb-Pb/Pb ion probe|deposition||250|NT|Yes|44112||Rawlings D.|01-MAR-95||16-MAR-95|Arnhem Land. Age Palaeoproterozoic (Statherian). Previously undifferentiated Fagan Volcanics. Within the Donydji Group.|Rhyolite: brown and pink, coarsely porphyritic with phenocrysts of K-feldspar, quartz and albite; minor volcaniclastic sandstone and mudstone; locally foliated and sheared.|acid volcanic rock|||N||17-JAN-23
Mail Change Limestone|11018|Mail Change Formation|32362|||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Middle Cambrian||||deposition|Middle Cambrian||||||15|NT|No|34395|44210|||||Eastern Georgina Basin.|Thick-bedded limestone, bituminous limestone, mottled calcilutite. Contains cycles of alternating limestone (<2m thick) and calcareous siltstone interbeds (up to 8m thick).|carbonate sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Mainoru Formation|11034|||||Yes|Formation, beds|Formal|Other new published name|Defined|Collara Subgroup|35509|||Calymmian|1492|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Calymmian||||deposition|270|1000|NT|No|44436|23937|||||Defined 1965.  Now [2001] includes Gibb and Wandjeli Sandstone Members, previously mapped as upper part of the Limmen Sandstone.  Occurs in the Beetaloo Sub-basin. Ages are said to be from tuffs in the Showell Member (Munson, 2016), which is at the top of the Mainoru Formation (although note that these ages have previously been described as from samples from 'the lower part of the Mainoru Formation (Jackson et al., 1999), and shown in Abbott & Sweet, 2000, and  Abbott et al 2001, as from the Wooden Duck Member.|Green, purple and grey, laminated siltstone and mudstone, light grey calcareous siltstone; medium to coarse, thick-bedded sandstone interbeds.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Mairmull Formation|75074|Mount Goodwin Formation, Lower|74057|||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Goodwin Subgroup|75073|||Induan||||deposition|Induan|||||||WA|No|67370||Gorter, J.D. (Eni Australia), Nicoll, R.S. (GA)|19-MAR-09|||Intended to supersede the Lower Mount Goodwin Formation of Gorter (1998). Of Mount Goodwin Subgroup (Gorter, Nicoll, et al. in prep. Mar2009).|Claystone and siltstone with rare thin sandstone interbeds, which are more common towards the top.|siliciclastic sedimentary rock|||N||17-JAN-23
Maiwok Subgroup|25195|Cobanbirini Formation|26483|||Yes|Subgroup|Formal|Variation of published name|Defined|Roper Group|16319|||Ectasian|1312.9|7|isotopic|deposition|Calymmian|||inferred|||2000|NT|No|44332|23937|||||Equivalent of old Cobanbirini Formation. Redefined to include Corcoran Fm and Bessie Creek Sandstone in Urapunga- Roper River Explan. notes.|Mudstone, shale (+/- carbonaceous), lithic-glauconitic sandstone, ooidal ironstone, quartzose sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Malita Formation|23751|Malita formation|11093|||Yes|Formation, beds|Formal|Variation of published name|Defined|Troughton Group|18608|||Norian||||deposition|Norian|||||||NT|No|40077|42442|J.C.Wise|28-FEB-75|||M 85/24985 NT, also WA. Connection initially missed, reservation allowed to expire Jan 1981.|Fluviodeltaic siliciclastics: red sandstone and shale; minor limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Mallabah Dolostone|33806|Mallabah Dolomite|26009|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Limbunya Group|10414|||Statherian||||deposition|Statherian|||||||NT|No|24297||Kruse P. , Beier P., Young D.|02-DEC-99|||Birrindudu - Victoria River Basins. Supersedes Mallabah Dolomite.|Stromatolitic dolostone, ferruginous dolostone, dolomitic mudstone, minor carbonaceous mudstone, intraformational conglomerate.|carbonate sedimentary rock|||N||17-JAN-23
Mallapunyah Formation|11103|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Umbolooga Subgroup|18813|||Statherian|||inferred|deposition|Statherian|1653|27|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||220|NT|No|44287|45162|||||Defn on Tech File E/53-3. Redefined 1987. Within the McArthur Group. Max depositional age from detrital zircons.|Interbedded red to purple dolomitic mudstone and variably dolomitic cross-bedded sandstone; stromatolitic dolostone, flat-pebble breccia, rare carbonaceous shale and pink tuffite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Malone Creek Granite|11123|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Jim Jim Suite|30779|Orosirian|1736|20|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1823|20|isotopic, U/Pb-Pb/Pb ion probe|||||No|46678||||||Pine Creek Province. See also Lexicon. Intrudes Burrell Creek Formation, Zamu Dolerite and El Sherana Group.|Pink to greenish-pink, fine chloritised evenly grained alkali feldspar granite with abundant quartz and greisen veins.|acid intrusive rock|||Y|I-type|17-JAN-23
Malone Creek Granite - phase 1|72372|||||Yes|Member, phase|Informal|Variation of published name|Described|Malone Creek Granite|11123|David Suite|72698|Orosirian|1810|||intrusion|Orosirian|1830|||||||No|||||||Lithology referring to an informal unnamed unit of the Malone Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pink to greenish-pink, fine chloritised evenly grained alkali feldspar granite with abundant quartz and greisen veins|acid intrusive rock|||Y||17-JAN-23
Malone Creek Granite - phase 2|72373|||||Yes|Member, phase|Informal|Variation of published name|Described|Malone Creek Granite|11123|David Suite|72698|Orosirian|1810|||intrusion|Orosirian|1830|||||||No|||||||Lithology referring to an informal unnamed unit of the Malone Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pink, fine to coarse, evenly grained to porphyritic, alkali feldspar granite|acid intrusive rock|||Y||17-JAN-23
Malone Creek Granite - phase 3|72374|||||Yes|Member, phase|Informal|Variation of published name|Described|Malone Creek Granite|11123|David Suite|72698|Orosirian|1810|||intrusion|Orosirian|1830|||||||No|||||||Lithology referring to an informal unnamed unit of the Malone Creek Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pink, fine porphyritic, alkali feldspar granite|acid intrusive rock|||Y||17-JAN-23
Mamadawerre Sandstone|34024|Mamadawerre|31285|||Yes|Formation, beds|Formal|Resvd name published|Defined|Kombolgie Subgroup|33373|||Statherian|1780|||deposition|Orosirian|1810||inferred, underlying unit|||1100|NT|No|60571|23374|||||Within the Katherine River Group.|White, thickly bedded, commonly tabular or trough cross-bedded, poorly sorted, medium to coarse quartz sandstone with pebble or granule bands; minor siltstone; polymictic pebble to boulder conglomerate at base|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Manbulloo Limestone Member|27964|||||Yes|Member, phase|Formal|Variation of published name|Described|Jinduckin Formation|24641|||Lower Ordovician||||deposition|Late Cambrian||||||||No|46679||||||(Randal, 1963).|Limestone.|carbonate sedimentary rock|||N||17-JAN-23
Manga Mauda Member|38423|Manga Mauda|35279|||Yes|Member, phase|Formal|Resvd name published|Defined|Hayward Creek Formation|8199|||Statherian||||deposition|Statherian||||||||No|24304|23733|||||Reserved as Manga Mauda (Donnellan, 2000). Within the Tomkinson Creek Group.|Lithic and sublithic, locally pebble-bearing sandstone and siltstone in a number of fining-upwards cycles; locally includes probable felsic volcanic rocks and tuffs; also immature wacke. Contains weathered mafic dykes and sills.|siliciclastic sedimentary rock|||N||17-JAN-23
Manga Mauda Member, Meerie Member|72660|||||Yes|Member, phase|Informal|Variation of published name|Described|Hayward Creek Formation|8199|||Statherian||||deposition|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Sublithic/lithic/volcanilithic arenite, feldspathic sublitharenite, pebbly arenite; shale, siltstone; acid to intermediate volcanic rocks particularly at top|siliciclastic sedimentary rock|||N||17-JAN-23
Maningkorrirr Phonolite|27827|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Nimbuwah Complex|25343|||Mesoproterozoic|||||Mesoproterozoic|1316|40|||||NT|Yes|33186||Needham, R.S.|20-MAR-73|Strusz, D.L.|16-SEP-74|Phonolite dyke swarm.|Fine to medium grained to porphyritic grey green dyke rock. Phenocrysts of euhedral anorthoclase and sanidine tablets and zoned aegirine-augites < 3 cm. Some pyroxenes rimmed by a pleochroic green sodic amphibole which occurs in the groundmass.|igneous rock|||N||17-JAN-23
Mantapayika Granite|33647|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Umutju Granite Suite|33650|Mesoproterozoic|1120|9||intrusion|Mesoproterozoic|1180||||||NT|Yes|60572|60683|Scrimgeour I., Close D.,Edgoose C.|27-JUL-99||27-JUL-99|Petermann Ranges 1:250 000 sheet area. Granite or gneiss. Age: 1120+/-9Ma (hornblende granite); 1147+/-3Ma (Kober Pb-Pb for clinopyroxene granite).  Of the Pitjantjatjara Supersuite.|Hornblende and clinopyroxene-bearing granites, typically porphyritic with blue-grey K-feldspars; variably deformed and recrystallised to garnet-bearing assemblages.|acid intrusive rock|||Y||17-JAN-23
Mantarurr Granite Suite|33648|Mantarurr|30602|||Yes|Group, Suite|Formal|Variation of reserved name|Defined|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1165|11||intrusion|Mesoproterozoic|1170||||||NT|Yes|60683|60683|Scrimgeour I., Close D.,Edgoose C.|13-NOV-96||27-JUL-99|Petermann Ranges 1:250 000 sheet area. Granite or gneiss. Age: ~1170Ma.|Dominantly porphyritic granite, with biotite-rich matrix, varies from megacrystic to fine- or medium-grained, mostly foliated; minor leucogranite; minor muscovite-bearing granite|acid intrusive rock|||Y||17-JAN-23
Manton Group|25203|||||Yes|Group, Suite|Formal|Other new published name|Defined|Woodcutters Supergroup|72988|||Paleoproterozoic|1885||inferred, overlying unit|deposition|Paleoproterozoic|2506|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|38884||||Kruse, P.D.|18-OCT-02|Koolpinyah Area. Proposer: JH Lally, M Ahmad, after B Pietsch. Western equivalent of Namoona Group. ?Shares some constituent units (Beestons Formation and Celia Dolostone). Intruded by the Zamu Dolerite. Max. depositional age 2506+/-14 Ma.|Sandstone, dolostone, magnesite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Mantungula Formation|23762|||||Yes|Formation, beds|Formal|Other new published name|Defined|Collara Subgroup|35509|||Calymmian||||deposition|Calymmian|1500||inferred|||174|NT|No|40691|23937|I.Sweet|19-OCT-84|||Previously included in Limmen Sandstone (Paine, 1963; and Plumb and Paine, 1964).  Called Wilberforce beds in Arnhem Land (Dunnet, 1965).  Occurs in the Beetaloo Sub-basin.|Laminated, micaceous and rarely glauconitic mudstone; fine grained sandstone and dolostone; minor siltstone; local basal conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Manuka Subgroup|11215|||||Yes|Subgroup|Formal|Variation of published name|Briefly described|Rolling Downs Group|16267|||Lower Cretaceous|||||Lower Cretaceous||||||||No|29591|||||||||||N||17-JAN-23
Mapata Gneiss|27478|Bundey Gneiss|2987|||Yes|Formation, beds|Formal|Other new published name|Defined|Strangways Metamorphic Complex|17395|||Orosirian|||||Orosirian|||||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|Intruded by Mount Swan Granite.|Biotite-quartz-feldspar gneiss with quartz-feldspathic segregations, biotite schist, amphibolite.|high grade metamorphic rock|||N||17-JAN-23
Mara Dolostone Member|76086|Mara Dolomite Member|11224|||Yes|Member, phase|Formal|Variation of published name|Described|Emmerugga Dolostone|76085|||Statherian||||deposition|Statherian||||||500|NT|No|64815||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011).|Dololutite, stromatolitic dololutite, dolomitic siltstone, dolarenite and dolomitic breccia; columnar, domical and conical stromatolites, commonly forming bioherm series; common halite casts and quartz nodules after evaporites.|carbonate sedimentary rock|||N||17-JAN-23
Maranboy Porphyry|26721|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Orosirian||||intrusion|Orosirian||||||||No|39679||||||Pine Creek Province.|Pinkish green-grey, medium-grained feldspar-quartz porphyry; strongly porphyritic hornblende granite|acid intrusive rock|||Y||17-JAN-23
Marchinbar Sandstone|11259|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wessel Group|27928|||Ediacaran||||deposition|Ediacaran||||||300|NT|No|44338|43010||||||White, quartz-rich, fine to medium grained sandstone, mostly medium bedded, flat to trough cross bedded, ripples|siliciclastic sedimentary rock|||N||17-JAN-23
Margaret Granite|11295|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Margaret Suite|31736|Orosirian|1820|||intrusion|Orosirian|1860|25|isotopic, U/Pb-Pb/Pb, TIMS|||||No|44950||||||Intrudes the Mount Partridge, South Alligator and Finniss River Groups. In 2011 shown as directly part of Cullen Supergroup. In 2013 shown as part of Margaret Suite, Cullen Supergroup.|Light grey to pink, medium- to coarse-grained, porphyritic to equigranular biotite-hornblende granite. Predominantly I-type.|acid intrusive rock|||Y|I-type|17-JAN-23
Margaret Hill Conglomerate|11296|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Mount Rigg Group|13064|||Statherian||||deposition|Calymmian||||||300||No|44201|||||||Thick to very thick-bedded polymictic pebble, cobble and boulder conglomerate; purple lithic sandstone and granule conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Margery Formation|26014|||||Yes|Formation, beds|Formal|Other new published name|Defined|Limbunya Group|10414|||Statherian||||deposition|Statherian||||||125|NT|No|28255|48943|||||Comprises upper chert horizon, central claystone horizon and lower chert horizon.|Stromatolitic dolostone, claystone, dolarenite, dololutite, stromatolitic chert, dolomitic sandstone and siltstone.|carbonate sedimentary rock|||N||17-JAN-23
Marlgowa Sandstone|33183|Marlgowa|31287|||Yes|Formation, beds|Formal|Resvd name published|Defined|Kombolgie Subgroup|33373|||Statherian|1740|||deposition|Statherian|1780|||||420|NT|No|22538|23374|Carson L., Brakel A., Pietsch B.|29-APR-97|Beier, P.|25-FEB-99|Milingimbi, SD53-02 sheet area. Within the Katherine River Group.|Medium-to thickly bedded, trough cross-bedded, well sorted medium quartz sandstone with minor pebbly beds; laminated and wave-rippled quartz sandstone interbedded with low-angle cross-bedded quartz sandstone; minor siltstone, conglomerate, dolerite sills.|siliciclastic sedimentary rock|||N||17-JAN-23
Marlgowa Sandstone, Gumarrirnbang Sandstone|72385|||||Yes|Formation, beds|Informal|Variation of published name|Described|Kombolgie Subgroup|33373|||Statherian|1740|||deposition|Statherian|1800|||||||No|||||||Informal grouping of units in the Kombolgie Subgroup to be used for Northern Territory 1:1 million geological map, National Maps Project.|Fine to very coarse grained and pebbly quartz sandstone; horizontal laminated to cross bedded; thin basalt member|siliciclastic sedimentary rock|||N||17-JAN-23
Marligur Formation|76874|Marligur Member|26015|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Bathurst Island Group|1249|||Cretaceous||||deposition|Cretaceous||||||||No|67564||||||Misspelling of Member or deliberate upgrade to Fmn? Money Shoal Basin.|Medium- to coarse-grained, poorly consolidated quartz sandstone, clayey sandstone and sandy claystone; thin basal quartzic conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Marshall Granite|11378|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|||Sainthill Suite|81827|Statherian|1720|18|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1791|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|44327|48844|||Munson, T. (NTGS)|25-AUG-22|Intrudes Deep Bore Metamorphics. Hosts the Molyhil W-Mo skarn deposit. Mylonitic parts are near identical to the Dinkum Orthogneiss in appearance.|Medium-grained biotite granite that has been chloritised and sericitised along the S walls, and K-feldspar altered along the N and W walls, of the Molyhil open cut.|acid intrusive rock|||Y||17-JAN-23
Marura Siltstone|11401|||||Yes|Formation, beds|Formal|Other new published name|Defined|Parsons Range Group|27873|||Statherian||||deposition|Statherian||||||280|NT|No|44299|43010||||||Siltstone: thin to thick-bedded, laminated to massive; thin to medium interbeds of dolomitic siltstone, sandstone and dolostone; dessication cracks and halite casts; stromatolitic chert bed near base.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Mary Granite|76076|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||Hollis, J. (NTGS)|17-AUG-11|||for the Quartz 100k sheet.|Granite.|acid intrusive rock|||Y||17-JAN-23
Mascotte Orthogneiss|80345|Mascotte Gneiss Complex|26019|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Molyhil Suite|81819|Statherian|||inferred||Statherian|1788.5|3.1|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71621|72516|Beyer, E. (NTGS)|29-NOV-17|Edgoose, C.|15-NOV-18|To be published in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. Originally assigned directly to the Baikal Supersuite. Reassigned to the the Molyhil Suite in 2022.|Biotite granitic gneiss: fine- to medium-grained, equigranular, locally occurring allanite, rare hornblende; fresh to moderately weathered; massive to foliated to gneissic with discontinuous mm-cm scale banding.|metamorphosed acid igneous rock|||Y|I-type|17-JAN-23
Masson Formation|11438|Masson Beds|32812|||Yes|Formation, beds|Formal|Other new published name|Defined|Namoona Group|13724|||Orosirian|2021|10|inferred, overlying unit|deposition|Paleoproterozoic|2500|||||3000|NT|No|44315|44314|||||Replaced by Whites Formation in Rum Jungle Area. Min. age from interfingering Stag Creek Volcanics. Previously of the former Goodparla Group. Hosts the Dam and Twin vein type U deposit.|Reddish-brown, carbonaceous-pyritic and dolomitic slate, phyllite and schist; carbonaceous pyritic dololutite; medium to coarse quartz meta-arenite, coarse to very coarse, poorly sorted feldspathic-quartz metagreywacke, fine to coarse dolarenite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Masterton Sandstone|25730|Mulholland Sandstone|13370|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Umbolooga Subgroup|18813|||Statherian|||inferred|deposition|Statherian|1755|6|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||600|NT|No|26310|45162|||||Within the McArthur Group. This name replaces original  "Masterton Formation" above a major unconformity within that unit. See also misspelt Masterson Sandstone. Maximum depositional age shown. Occurs only in Batten Fault Zone. From 1999 excludes sandstone on Wearyan Shelf, which is now called Echo Sandstone, and sandstone in NE Tanumbirini sheet area - now Burash Sandstone.|Basal conglomerate. Pink, brown and buff, fine- to medium-grained, moderately sorted quartz arenite; minor recessive very fine-grained sandstone and siltstone units; distinctly ferruginous mottled sandstone with halite and gypsum casts.|siliciclastic sedimentary rock|||N||17-JAN-23
Mattamurta Sandstone|11455|||||Yes|Formation, beds|Formal|Other new published name|Defined|Parsons Range Group|27873|||Statherian||||deposition|Statherian||||||3000|NT|No|44299|43010||||||Quartz sandstone: white to pink, medium to very thick bedded, fine to coarse grained, with granule-rich laminae and scattered pebbles; common cross bedding and symmetrical ripples; local rhyolite near base|siliciclastic sedimentary rock|||N||17-JAN-23
Maud Dolerite|24374|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian||||intrusion|Orosirian|||||||NT|Yes|41294||Needham, R.S.|22-MAY-87|Brown, M.C.|16-OCT-87|Not to be confused with Maud Formation in Tasmania.|Medium-grained, grey-green quartz dolerite, metadolerite|basic intrusive rock|||Y||17-JAN-23
Maurice Formation|11476|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Early Cambrian|||inferred, lithostratigraphic correlation|deposition|Ediacaran|||inferred, lithostratigraphic correlation|||3600|NT|No|48842|48842|||||Not to be confused with Maurice Group of SA. Max depositional age from detrital zircon from lower Maurice Formation: 831+/-13 Ma. Max depositional age from detrital zircon from upper Maurice Formation: 698+/-20 Ma.|Very fine to medium grained, cross bedded quartz sandstone; minor laminated micaceous siltstone and micaceous sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Maverick Monzogranite|42116|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|50315||||||Probably an informal name. See also Sarah Granite (defined).|Equigranular, homogenous, undeformed, hornblende-biotite monzogranite to granodiorite.|acid intrusive rock|||Y||17-JAN-23
McAddens Creek Volcanic Member|25218|||||Yes|Member, phase|Formal|Variation of published name|Described|Mamadawerre Sandstone|34024|||Statherian|1780|||eruption|Orosirian|1810|||||150||No|22574||||||Within the Katherine River Group. See also Lexicon. Recommended by Sweet (2001) that this name be replaced by Nungbalgarri Volcanics. Lies between Mamadawerre Sandstone and Gumarrirnbang Sandstone of the lower Katherine River Group in vicinity of ABC uranium prospect. (RefID65232)|Dark grey, massive, altered basalt and andesite, vesicular in places; minor hematitic siltstone, banded tuff, rhyolite.|basic volcanic rock|||N||17-JAN-23
McArthur Basin - moderately magnetic rocks 79889|79889|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
McArthur Basin - sediments and volcanics 79879|79879|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments and volcanic rocks.|sedimentary rock|igneous volcanic rock||N||17-JAN-23
McArthur Basin - siliciclastic rocks 79899|79899|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Siliciclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
McArthur Basin - strongly magnetic rocks 79903|79903|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
McArthur Basin - strongly magnetic rocks 79989|79989|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
McArthur Basin - weakly magnetic rocks 79923|79923|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
McArthur Group|11512|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Statherian|1614|4|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1690|27|isotopic, U/Pb-Pb/Pb ion probe|||5500|NT|No|44306|43010|||||Defined by Dunnet (1965),defn on Tech File E/53-3. Defined again in 1992. Max. age: Statherian - 1690+/-27 Ma from HYC Pyritic Shale Member, Barney Creek Formation from Page (1981). Karns Dolomite now incorporated into Nathan Group. Petroleum potential, particularly in fault bounded sub-basins in the southern Batten Fault Zone. Is a NT unit and does not extend into Queensland [Advice from IWW JUL-2020].|Interbedded stromatolitic and evaporitic dolostone, sandstone, mudstone, and minor tuffaceous mudstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
McArthur Group, Lower|40831|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Umbolooga Subgroup|18813|||Statherian||||deposition|Statherian||||||||No|23968||||||Informal unit used in regional compilations.  Includes units from Masterton Sandstone to Emmerugga Dolomite [Now Emmerugga Dolostone] in the 1:1 million surface geology of Australia.|Masterton Sandstone to Emmerugga Dolomite: Evaporitic-stromatolitic dolostone, dolomitic siltstone and sandstone, quartzose sandstone; minor basal conglomerate|carbonate sedimentary rock|||N||17-JAN-23
McArthur Group, Middle|72389|||||Yes|Formation, beds|Informal|Variation of published name|Described|Umbolooga Subgroup|18813|||Statherian||||deposition|Statherian||||||||No|71632||||||Informal grouping of units of the middle McArthur Group to be used for Northern Territory 1:1 million geological map, National Maps Project.  Includes units from Teena Dolomite [now Teena Dolostone] to Reward Dolomite [now Reward Dolostone].|Teena Dolomite to Reward Dolomite: Dolostone, dololutite, carbonaceous and pyritic siltstone and mudstone; minor pink and green ?tuffaceous mudstone|carbonate sedimentary rock|||N||17-JAN-23
McCarthys Granite|23776|Cullen Granite|4989|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Fingerpost Suite|31737|Orosirian|1825|||intrusion|Orosirian|1840||||||NT|No|39679||Needham, R.S.|13-JUL-83|||Pine Creek Province. Previously mapped as part of Cullen Granite. Of the Cullen Supersuite.|Coarse pink-green porphyritic hornblende-biotite granite; coarse grey porphyritic biotite granite; coarse pink, partly porphyritic, biotite leucogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
McCaw Formation|11530|Diamond Creek Formation""|41910|||Yes|Formation, beds|Formal|Other new published name|Defined|Katherine River Group|9312|||Statherian|1720||inferred, overlying unit|deposition|Statherian|1740||inferred, geological correlation|||400|NT|No|44400|43010|||||Previously mapped as Diamond Creek Member (1959)?; and as Diamond Creek Volcanics (Kruse et al, 1994) and "Diamond Creek Formation" (Dunn, 1963).|Interbedded deeply weathered and leached mudstone and thinly bedded dolostone; thinly bedded, fine to coarse grained lithic and glauconitic sandstone; polymictic conglomerate lenses.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
McDermott Formation|26021|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tawallah Group|17902|||Statherian|1740||inferred, overlying unit|deposition|Statherian|1750||inferred, underlying unit|||200|NT|No|44306|45162|||||Defn on Tech File E/53-8.  Numeric age estimates are inferred and poorly constrained. Rocks in the Batten Fault Zone previously assigned to the Aquarium Formation (Pietsch et al., 1991 and Haines et al., 1993) are now (Rawlings, 2006, p92) reassigned to the McDermott Formation.|Stromatolitic and oolitic dolomite, dolarenite, glauconitic sandstone, shale, siltstone, chert interbeds|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
McEwin Hills intrusion 78216|78216|||||Yes|Formation, beds|Informal|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. No lithology stated, but said to be mafic bulk composition. Aileron province in Meixner magnetic interpretation (Meixner & Hoatson, 2004). Age inferred to be ~1810 Ma.|Mafic intrusive.|basic intrusive rock|||Y||17-JAN-23
McKay Sandstone|11552|||||Yes|Formation, beds|Formal|Other new published name|Defined|Kombolgie Subgroup|33373|||Statherian|1740|||deposition|Statherian|1780|||||342|NT|Yes|44400|43010|||Beier, P.|30-NOV-98|In parts of Mount Marumba, Milingimbi, Mount Evelyn and Katherine 1:250 000 sheet areas. Formerly mapped as parts of "Kombolgie Formation" and the "Diljin Hill Fm." (of Walpole, 1962). Within the Katherine River Group. See also misspelling Mackay Sandstone.|Cross-bedded, glauconitic quartz sandstone; thin laminated mudstone and siltstone interbeds; fine to coarse grained ferruginous sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
McKinlay Granite|26731|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||Margaret Suite|31736|Orosirian|1820|||intrusion|Orosirian|1850||||||NT|No|45003||||||Cullen Batholith. Pine Creek Province. Part of the Cullen Supersuite.|Light grey medium to coarse grained predominantly equigranular biotite-hornblende granite.|acid intrusive rock|||Y|I-type|17-JAN-23
McMinns Bluff Granite|23781|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||McMinns Bluff Suite|31735|Paleoproterozoic|1818|6|isotopic, U/Pb-Pb/Pb, TIMS|intrusion|Paleoproterozoic|1835|6|isotopic, U/Pb-Pb/Pb ion probe|||||No|39679||Needham, R.S.|13-JUL-83|||Cullen Batholith. Pine Creek Province. Within the Cullen Supersuite. Intruded by Douglas Granite.|Pink and grey, coarse-grained, predominantly porphyritic biotite-hornblende granite; fine- to coarse-grained biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
McMinns Bluff Suite|31735|McMinns Suite|79362|||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic||||||||No|70866||||||Of Stuart-Smith et al. (1993 and Wyborn et al (1997). Cullen Batholith. Pine Creek Province. Includes McMinns Bluff Granite. Unclear if NTGS has deliberately or accidently changed the Suite name to McMinns Suite.||acid intrusive rock|||Y||17-JAN-23
McNamara Group|11575|Ploughed Mountain beds|15329|||Yes|Group, Suite|Formal|Other new published name|Defined|||||Calymmian|1595|6|isotopic, U/Pb|deposition|Statherian|1653|7|isotopic, U/Pb|||10000|QLD|Yes|30534|37459|Sweet, I.||Brakel, A.|12-MAR-82|Considered Carpentarian in 1981. Now considered Palaeoproterozoic by NABRE project ,1999. Part of Gun Supersequence. This group in Lawn Hill Platform region correlates with the Fickling Group in southern Murphy Inlier. Correlated with Paragon Group, Broken Hill Block in RefID 64743 (2008). (See also Geology of Queensland 2013, p41)|Carbonaceous shale, stromatolitic dolostone, turbiditic sandstone and siltstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
McNamara Group, Lower|67841|||||Yes|Subgroup|Informal|Variation of published name|Described|McNamara Group|11575|||Statherian||||deposition|Statherian||||||||No|24432||||||Lower section of the McNamara Group. Informal unit used on regional scale maps, including the 1:1 million geology of Australia.  Includes Drummond Formation, Brumby Formation (NT), and Torpedo Creek Quartzite (, Gunpowder Creek, Paradise Creek, Esperanza, etc) to Lady Loretta Formation (QLD).|Drummond Formation and Torpedo Creek Quartzite to Lady Loretta Formation: Dolomite, dolomitic siltstone, quartzose to lithic sandstone, stromatolitic and brecciated chert, siltstone, ferruginous breccia, shale; basal quartzite, conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
McNamara Group, Upper|40828|||||Yes|Subgroup|Informal|Variation of published name|Defined|McNamara Group|11575|||Statherian||||deposition|Statherian||||||||No|23957||||||Upper section of the McNamara Group. Informal unit used on regional scale maps.  Includes Shady Bore Quartzite, Plain Creek Formation, Lawn Hill Formation. Refers to the upper part of the McNamara Group.|Shady Bore Quartzite and Bullrush Conglomerate to Lawn Hill Formation: Quartzose to lithic, feldspathic and micaceous sandstone, siltstone, shale, tuff, dolomitic siltstone and sandstone; basal polymictic conglomerate and quartzite|siliciclastic sedimentary rock|||N||17-JAN-23
Meerie Member|38422|Meerie|35280|||Yes|Member, phase|Formal|Resvd name published|Defined|Hayward Creek Formation|8199|||Statherian|1784|9||deposition|Statherian|1784|9||||870||No|24304|23733|||||Reserved as Meerie (Donnellan, 2000).  Within the Tomkinson Creek Group.|Sublithic/lithic/volcanilithic arenite, feldspathic sublitharenite, pebbly arenite; acid to intermediate volcanic rocks particularly at top|siliciclastic sedimentary rock|||N||17-JAN-23
Meeway Volcanics|26025|||||Yes|Formation, beds|Formal|Other new published name|Defined|Finniss River Group|6669|Gerowie Suite|31730|Orosirian|1861|4|inferred, lithostratigraphic correlation|eruption|Orosirian|1862|3|inferred, lithostratigraphic correlation|||1000|NT|No|32310|48942|||||Within or at base of Burrell Creek Formation in Fitzmaurice area.|Porphyritic rhyolite, tuff, sandy tuff.|acid volcanic rock|||N||17-JAN-23
Melville Bay Metamorphics|30958|Melville (Bay) Metamorphics|22306|||Yes|Formation, beds|Formal|Resvd name published|Defined|Bradshaw Complex|2472|||Orosirian|1860|5|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Orosirian|1895|8|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|44112|44112|Madigan T., Rawlings D.|01-JAN-96|Comm. Territories SNSC|01-JAN-97|Arnhem Land (Gove 1:100 000 map sheet?)|Gneiss: granulite facies, cordierite-garnet and orthopyroxene-quartz bands; mafic gneiss: two pyroxene, intruded by pods and veins of medium-grained garnetiferous leucogranite|high grade metamorphic rock|||N||27-APR-23
Mendip Metamorphics|11649|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Statherian|1730|4|inferred, intrusive relationship||Statherian|1790||inferred|minimum depositional age|||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|Geol. Prov: eastern Arunta Inlier. Intruded by pegmatite at 1730 +/- 4 Ma.  Detrital zircons in quartzite suggest deposition after 1770 Ma. Not to be confused with Mendip Formation of NSW.|Quartzite, biotite-two feldspar gneiss; minor granule conglomerate, para-amphibolite, calc-silicate gneiss.|high grade metamorphic rock|||N||17-JAN-23
Mereenie Sandstone|11667|Mareenie Sandstone|11286|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Middle Devonian|398||inferred, overlying unit|deposition|Ordovician|461||inferred, underlying unit|deposition|220|1500|NT|No|48838|48838|||||Defined 1962. Important aquifer - main source of groundwater for Alice Springs.  Formerly included in the underlying Larapinta Group and later,  the overlying Pertnjarra Group. Ungrouped in 2005. Note that Schmid (2016) and Austin et al (2017) still include this unit in the Larapinta Group. Poorly constrained age - probably Silurian-Devonian, but could be as old as Late Ordovician.  Formerly Mareena Bluff Formation. Also known as 'Marena red sandstone'. Numerical ages from Global Palaeomagnetic Database (GPMDB; McElhinny & Lock 1993, 1996).|Porous, white to pale-brown, fine grained, well sorted quartz sandstone, minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Merlin kimberlite|36790|||||Yes|Formation, beds|Informal|Other new published name|Described|||||Tournaisian|352|4|isotopic, Rb/Sr||Givetian|382|3||||||No|23772||||||These are located in the Batten Trough of the southern McArthur Basin, ~ 90 km south of Borroloola, Northern Territory. Thirteen single or bifurcating kimberlite bodies have been delineated within the main Merlin Kimberlite field. In July 2022, the Lucapa Diamond Company announced the delineation of a further potential targets to the east of the Merlin field, through the interpretation of the historical De Beers hyperspectral data (Lucapa Diamond Company, 2022). At the time of writing, there is no knowledge if these anomalies are confirmed kimberlites occurrences. A further two kimberlites document at Abner Range, ~50 km to west, are identified to be of a similar age (Jaques, ####), and are herein included within the Merlin kimberlites. Detailed accounts of the Merlin kimberlite pipes (main field) presented in Lee et al. (1998) RefID 23115 and Hell et al. (2003) RefID 73922 forms the basis of the summary presented herein. Surface expression is absent, with the kimberlites being overlain by ~20 m of mudstone, and fine- to medium-grained sandstone. The kimberlites from the Merlin field have been dated by several workers including Hell et al. (2003; Ar-Ar), Atkinson et al. (1990; K-Ar), Redcliffe (1999; Rb-Sr) and McInnes et al. (2009; U-Th/He) yielding the relatively restricted range reported herein. Late Devonian to Early Carboniferous (Givetian-Hastarian).|Kimberlite, consisting of serpentine, iron oxides, silica, calcite/Mg calcite, phlogopite, spinel and chlorite; fresh olivine is rarely present.|exotic composition igneous rock|||Y||07-JUN-23
Mesoproterozoic amphibolite-facies metamorphics 76658|76658|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|1200||||Mesoproterozoic|1400|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Medium-grade metamorphic rocks, generally with amphibolite-facies assemblages; may have a greenschist overprint|high grade metamorphic rock|||N||17-JAN-23
Mesoproterozoic felsic volcanics 76630|76630|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Calymmian|1550|||eruption|Calymmian|1570|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic volcanic rock, including lavas and tuffs. Association may include volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Mesoproterozoic granites 76632|76632|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Stenian|1050|||intrusion|Stenian|1080|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Mesoproterozoic granites 76634|76634|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Stenian|1100|||intrusion|Ectasian|1300|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Mesoproterozoic granites 76637|76637|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|1500|||intrusion|Mesoproterozoic|1620|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset. [Note: Max Age name is in conflict with numerical age (Paleoproterozoic). Which is correct? CEB Feb-2012]|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Mesoproterozoic granulite-facies metamorphics 76642|76642|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Ectasian|1200||||Ectasian|1300|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|High-grade metamorphic rocks, generally with granulite facies assemblages; includes granitic gneisses|high grade metamorphic rock|||N||17-JAN-23
Mesoproterozoic granulite-facies metamorphics 76644|76644|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Calymmian|1560||||Calymmian|1600|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|High-grade metamorphic rocks, generally with granulite facies assemblages; includes granitic gneisses|high grade metamorphic rock|||N||17-JAN-23
Mesoproterozoic intrusive complexes 76640|76640|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Stenian|1100|||intrusion|Stenian|1200|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mixed felsic, mafic and/or alkaline intrusives; may include ultramafic rocks; includes alkaline rocks such as trachyte and syenite.|igneous intrusive rock|||Y||17-JAN-23
Mesoproterozoic mafic intrusives 76626|76626|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Ectasian|1290|||intrusion|Ectasian|1330|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Dolerite, gabbro and other mafic igneous rocks; commonly as dykes and sills; may include some metamorphosed mafic intrusions and subordinate ultramafic rocks.|basic intrusive rock|||Y||17-JAN-23
Mesoproterozoic sedimentary rocks 76647|76647|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|1000|||deposition|Mesoproterozoic|1200|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Mesoproterozoic sedimentary rocks 76649|76649|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Stenian|1040|||deposition|Stenian|1080|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Mesoproterozoic sedimentary rocks 76654|76654|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Calymmian|1500|||deposition|Calymmian|1560|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Mia Mia Volcanics|26313|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1810|||eruption|Orosirian|1870|||||2000|NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project. Tennant Creek / Davenport Province.  Not the same unit as Mia Mia Igneous Complex of Qld. Formerly of the Ooradidgee Subgroup (Hatches Creek Group). Unit undated. Age of Ooradidgeee Group given.|Felsic tuff and lava; minor feldspathic/lithic arenite and quartz arenite; rare volcaniclastic arenite|acid volcanic rock|||N||17-JAN-23
Michell Nob Granite|38101|Michell Nob granite|38045|||Yes|Formation, beds|Formal|Variation of published name|Described|||Warakurna Supersuite|73257|Mesoproterozoic|1068|6|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Mesoproterozoic|1068|6|isotopic, U/Pb-Pb/Pb ion probe|||||No|24301||||||Age: 1068+/-6Ma (SHRIMP U-Pb zircon: Camacho 1997). Near Mulga Park Station.|Coarse, porphyritic biotite-hornblende granite, variably mylonitised. Locally garnet-bearing|acid intrusive rock|||Y||09-AUG-23
Michell Nob Granite and Nulchara Charnockite|76197|||||Yes|Formation, beds|Informal|Variation of published name|Unpublished|||||Mesoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Musgrave Province. Porphyritic biotite-hornblende granite, variably mylonitised, locally garnet-bearing (Michell Nob Granite) and coarse, porphyritic charnockite with clinopyroxene-orthopyroxene-hornblende-biotite and common rapakivi texture (Nulchara Charnockite). Informal unit to be used for Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Porphyritic biotite-hornblende granite, variably mylonitised, locally garnet-bearing (Michell Nob Granite) and coarse, porphyritic charnockite with clinopyroxene-orthopyroxene-hornblende-biotite and common rapakivi texture (Nulchara Charnockite)|acid intrusive rock|||Y||17-JAN-23
Middle Creek Sandstone Member|25235|||||Yes|Member, phase|Formal|Variation of published name|Defined|Mullera Formation|13391|||Calymmian||||deposition|Calymmian||||||150|QLD|No|26310|26310|||||Mount Isa area, extending to Mount Drummond, NT. See also Middle Creek Member. Within the South Nicholson Group. Location of junior synonym, Mistake Creek Sandstone (Smith & Roberts, 1963, no type section established) might be considered for an NT reference section of the Middle Creek Sandstone Member.|Grey and light brown, massive to flaggy, fine to medium sandstone, with some interbedded siltstone and shale.|siliciclastic sedimentary rock|||N||09-OCT-23
Milingimbi Formation|11835|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Goulburn Group|7636|||Lower Ordovician||||deposition|Lower Ordovician||||||||No|42058||||||See also the misspelt Milingimbie Formation. Thickness: 169m+.|Dolostone, limestone, glauconitic sandstone, shale; becomes more siliciclastic up-section; conodont faunas.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Milligans Formation|11862|Milligans beds|11864|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Weaber Group|19643|||Visean||||deposition|Tournaisian||||||2143||No|44159|61542|||||Of Beere (1984). Gorter et al (2005) subdivided off part of the original Milligans Formation as Yow Fm.and relegated Waggon Creek Fm. to Waggon Creek  facies. See also Waggon Creek Formation (interbedded within Milligans Formation and now relegated to Waggon Creek Facies status within Milligans Formation by Gorter et al (2005) - APPEA Journal 2005 (45/1).)|Black and dark grey shale, partly calcareous; minor limestone; rare fine to medium-grained sandstone; thin to thick beds; diverse fauna.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Milliwindi Dolerite|39039|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Kalkarindji Suite|75724|Early Cambrian|510|1||magmatic crystallisation|Early Cambrian|513|12|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|24303||||||270 km long northwest-trending dolerite dyke near Bell Gorge on Gibb River Road, west Kimberley; interpreted to be a feeder dyke to Antrim Plateau Volcanics (location: Lat 17o 10' 14", Long 125o, 19' 2"; 7465000 E, 8100100 N). Age: 513 +/- 12Ma (SHRIMP Zircon, Hanley and Wingate, 2000). See also informal Milliwindi dolerite. Included in the Kalkarindji Suite in Oct 2009. Note that GSWA considers this unit to be at Group/Suite rank rather than Formation rank.|Dolerite dykes.|basic intrusive rock|||Y||17-JAN-23
Milyakburra Formation|22337|Groote Eylandt Beds""|7832|||Yes|Formation, beds|Formal|Resvd name published|Defined|Bustard Subgroup|21402|||Orosirian|1790||inferred|deposition|Orosirian|1814|8|inferred, underlying unit|||40|NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Within the Groote Eylandt Group.|Cobble and boulder conglomerate: matrix to clast-supported, coarse sand to granule matrix; locally interbedded with granule conglomerate and medium to coarse-grained lithic sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Milyema Formation|34025|||||Yes|Formation, beds|Formal|Other new published name|Defined|Bustard Subgroup|21402|||Orosirian|1790||inferred|deposition|Orosirian|1814|8|inferred, underlying unit||||NT|Yes|22808|22808|||||Within the Groote Eylandt Group.|Granule to boulder conglomerate, coarse-grained to pebbly lithic sandstone, pink medium-grained sandstone|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Mingabarri Formation|84103|Crow Formation|37729|||Yes|Formation, beds|Formal|Other new published name|Defined|Benmara Group|42492|||Statherian|1625||||Statherian|1649|19|||1500|2200|NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|Originally mapped as part of Mullera Formation. Unclear why the name change from Crow Formation.|Overall coarsening-upward succession, interdigitating facies throughout . Ferruginous chert, silcrete and calcareous clayey saprolite. Fissile to flaggy siltstone, micaceous, qtz, sublithic sandstones, shale and claystone. Pebbly sandstone, conglomerate.||||N||03-OCT-23
Minglo Granite|11911|Cullen Granite|4989|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Fingerpost Suite|31737|Paleoproterozoic|1820|||intrusion|Paleoproterozoic|1825||||||NT|No|39679||||||Pine Creek Province. Of the Cullen Supersuite. Mapped as part of Cullen Granite by Noakes (1949) and Malone (1962).|Pink and green, coarse porphyritic hornblende-biotite granite; pink coarse porphyritic biotite granite; minor grey fine equigranular leucogranite in outer zone. Predominantly I-type.|acid intrusive rock|||Y|I-type|17-JAN-23
Minglo Granite - phase 1|72365|||||Yes|Member, phase|Informal|Variation of published name|Described|Minglo Granite|11911|||Orosirian|1820|||intrusion|Orosirian|1840|||||||No|||||||Lithology referring to an informal unnamed unit of the Minglo Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pink and green, coarse porphyritic hornblende-biotite granite|acid intrusive rock|||Y||17-JAN-23
Minglo Granite - phase 2|72366|||||Yes|Member, phase|Informal|Variation of published name|Described|Minglo Granite|11911|||Orosirian|1800|||intrusion|Orosirian|1820|||||||No|||||||Lithology referring to an informal unnamed unit of the Minglo Granite to be used for Northern Territory 1:1 million geological map, National Maps Project.|Grey fine equigranular leucogranite|acid intrusive rock|||Y||17-JAN-23
Mirarrmina Complex|25243|McClaren Complex""|38426|||Yes|Formation, beds|Formal|Other new published name|Defined|||Bradshaw Suite|31335|Orosirian|||isotopic, U/Pb||Orosirian|1881|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|No|44299|43010|||||Age: Orosirian to Statherian. Also in McArthur Basin in (00/30118). Previously informally known as "McClaren Complex".|Foliated garnetiferous granite gneiss, metasedimentary rocks; younger undivided sedimentary and igneous rocks with complex structural and intrusive relationships|high grade metamorphic rock|||Y||17-JAN-23
Mitchell Yard Dolostone Member|76087|Mitchell Yard Dolomite Member|27836|||Yes|Member, phase|Formal|Variation of published name|Described|Emmerugga Dolostone|76085|||Statherian||||deposition|Statherian|||||||NT|No|64815||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). See Jackson et al. 1987, p87-93 for type section location & description.|Massive, dark grey, karstic-weathering, crystalline dololutite; lacks obvious internal sedimentary structure.|carbonate sedimentary rock|||N||17-JAN-23
Mitchiebo Volcanics|11983|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Carrara Range Group|3679|||Statherian||||eruption|Statherian|||||||NT|Yes|38237|49018|I.P.Sweet|08-JAN-80|Brakel, A.|12-MAR-82||Purplish-brown to reddish-brown, strongly altered vesicular and amygdaloidal basalt or trachyte; feldspathic and lithic sandstone; minor micaceous siltstone and shale.|basic volcanic rock|||N||03-JUN-23
Mithaka Formation|11984|Mithaka Beds|32949|||Yes|Formation, beds|Formal|Variation of published name|Defined|Toko Group|18263|||Katian|||biozone|deposition|Sandbian|||biozone|||156|QLD|No|44358|44309||||||Gypsiferous shale and siltstone, calcareous siltstone, quartz sandstone, glauconitic and micaceous quartz sandstone, minor coquinite and granule conglomerate.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Mittiebah Formation|82948|Mittiebah Sandstone|11995|||Yes|Formation, beds|Formal|Variation of published name|Defined|Accident Subgroup|37738|||Calymmian|||inferred||Calymmian|1586|7|inferred|||||Yes|73042||||Munson, T. (NTGS)|01-JUN-23|Shown in diagram as part of Paleoproterozoic Benmara Group (Anderson et al 2020), and also shown on same diagram as Mittiebah Sandstone, part of Mesoproterozoic South Nicholson Group, implying, but not explaining that the rocks previously considered as all belonging to the Mittiebah Sandstone, are likely not all the same age. See also Creswell Creek Formation of Benmara Group. Mittiebah Formation now used for Sth Nicholson Group part of old Mittiebah Sandstone.|fine to very coarse-grained lithic to sublithic sandstone, some with granules and pebbles. Fine to medium grained sublithic to quartzose sandstone. V coarse grained quarzose to lithic sandstone.  All with cross bedding.||||N||04-OCT-23
Mittiebah Sandstone|11995|||Mittiebah Formation|82948|Yes|Formation, beds|Superseded|Other new published name|Defined|Accident Subgroup|37738|||Calymmian|1586|7|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1625|27|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||2700|NT|No|44306|44301|||||Defined 1966. Defn on Tech File E/53-12. Within the Accident Subgroup, South Nicholson Group. This unit replaced by both Mittiebah Formation and Creswell Creek Formation.|Medium to thick bedded, fine to coarse grained, quartzose to lithic sandstone; minor interbeds of pebble or cobble conglomerate and siltstone|siliciclastic sedimentary rock||continental rift|N||04-OCT-23
Mitty Member|38419|Mitty|29854|||Yes|Member, phase|Formal|Resvd name published|Defined|Morphett Creek Formation|12356|||Paleoproterozoic||||deposition|Paleoproterozoic||||||2200||No|24304|24303|||||Reserved as Mitty (Donnellan, 1995). Formerly undifferentiated Tomkinson Creek beds.|Mudstone; sst, dolomitic mudst. and sst, dolost., pebble conglom., tuffaceous siltst; laminated to medium bedded stromatolitic bioherms, oolid grainst., lensing beds, cauliflower and enterolithic chert, halite, gypsum and anhydrite pseudomorphs; recessive|sedimentary rock|||N||17-JAN-23
Mollie Granite Complex|73523|||||Yes|Group, Suite|Formal|Other new published name|Defined||||||||||||||||||No|65341|65341|Haines, P. W. and Scrimgeour, I. R.|31-JUL-07||||An early phase of dark, biotite-rich granodiorite with abundant dark enclaves is intruded by leucocratic, interlayered and ?co-magmatic microgranite and porphyritic granite with a distinctive flow foliation of tabular K-feldspar phenocrysts.|acid intrusive rock|||N||17-JAN-23
Molyhil Suite|81819|||||Yes|Group, Suite|Formal|Resvd name published|Briefly described|||Baikal Supersuite|80342|Statherian|||inferred||Statherian|||inferred||||NT|Yes|73123||Reno, B. (NTGS)|31-JAN-20|Munson, T. (NTGS)|25-AUG-22|To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Name is derived from the Molyhil Mine. The nearest town Alateye on the Huckitta Map Sheet.|granite, granodiorite, orthogneiss.|acid intrusive rock|||Y|I-type|17-JAN-23
Money Shoal beds|12097|Money Shoal Beds|12095|||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|42056||||||Informal name for a poorly known Palaeozoic section intersected at base of the Money Shoal 1 well; not equivalent to Money Shoal Group  (per J.Totterdell, 15Nov06).  Sandstone with minor siltstone and claystone in Money Shoal-1 well.|Sandstone with minor siltstone and claystone.|siliciclastic sedimentary rock|||N||17-JAN-23
Montara Formation|12126|||||Yes|Formation, beds|Formal|Other new published name|Described|Swan Group|17573|||Oxfordian||||deposition|Callovian||||deposition||||No|42053|||||||Retrogradational deltaic sandstones and transgressive marine shales.|siliciclastic sedimentary rock|||N||17-JAN-23
Montejinni Limestone|12130|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ordian-Early Templetonian|||biozone|deposition|Ordian-Early Templetonian|||biozone||150|151.2|NT|Yes|44965|60684|Kruse, after Traves (1955)||Kruse, P.D.|06-AUG-92|Lateral correlative of Tindall Limestone and Gum Ridge Formation.|Fossiliferous limestone, dolostone, calcareous mudstone; minor fine-grained sandstone and siliciclastic mudstone; chert and nodular evaporitic pseudomorphs; silicified outcrop, recessive.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Montejinni Limestone, Hooker Creek Formation|72393|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Middle Cambrian||||deposition|Middle Cambrian||||||||No|||||||Informal grouping of units to be used for Northern Territory 1:1 million geological map, National Maps Project.|Fine to medium crystalline dolomite, dolomitic siltstone, siltstone, gypsum veins. Red-brown, laminated, micaceous, dolomitic siltstone, siltstone, silty dolomite|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Monument Formation|12151|Monument Beds|12149|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Ooradidgee Group|39122|||Orosirian|1845|4|inferred, overlying unit|minimum depositional age|Orosirian|1853|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|33307||||||Formerly of the Flynn Subgroup. Not to be confused with Monument Granite in the Yilgarn Craton and Monument Intrusive in Qld.|Rhyolitic and rhyodacitic tephra, tuffaceous/volcaniclastic sandstone, siltstone.|acid volcanic rock|||N||10-AUG-23
Moonkinu Sandstone|12250|Moonkinu Member|12248|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Bathurst Island Group|1249|||Cenomanian|||biozone|deposition|Cenomanian|||biozone|||400||No|41532|||||||Fine to very fine, sublabile sandstone interbedded with grey carbonaceous mudstone and siltstone. Calcareous and limonitic concretions. Strongly weathered in outcrop with the development of a trizonal laterite profile.|siliciclastic sedimentary rock|||N||17-JAN-23
Moonlight Gneiss|79602|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||Statherian|1770||inferred||Statherian||||||||No|69510|||||||Strongly foliated to locally mylonitic.||||N||17-JAN-23
Moonlight Valley Tillite|25260|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Duerdin Group|5760|||Ediacaran|610||inferred|deposition|Cryogenian|793|30|isotopic, Rb/Sr|maximum depositional age||280|WA|No|44317|48938|||||Ruby Plains 1:100 000 sheet area.   Age: c. 610Ma. Possibly equivalent to other diamictite of Duerdin Group. Age: 793 +/- 30Ma (Rb-Sr) and 610Ma. Correlated with Elatina Formation. Said to include dolostone in Auvergne and Waterloo areas. Wolfe Basin.|Massive matrix-supported polymictic pebble to boulder conglomerate; larger clasts striated; poorly sorted massive sandstone. Diamictite, dolostone "cap".|siliciclastic sedimentary rock|||N||17-JAN-23
Mooroongga Formation|12299|||||Yes|Formation, beds|Formal|Other new published name|Described|Goulburn Group|7636|||Ordovician||||deposition|Cambrian||||||201||No|42058|||||||Shale, limestone, sandstone, glauconitic sandstone; minor chert, dolomitic in part; becomes more calcareous up-section; limited conodont faunas.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Mopunga Group|12305|Mopunga Beds|12304|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Ediacaran|||inferred, overlying unit|deposition|Ediacaran|||inferred, underlying unit|||800|QLD|Yes|44327|48990|Walter M.R. (after Noakes 1956)|26-APR-80|Passmore, V.L.|26-MAY-80|Defined 1964. See also Lexicon. Redefined 1980. SF53-6,10,11. Redefined 2003 by P.D. Kruse, proposed by Noakes (1956). Age is Ediacaran (Late Adelaidean). See also Mopunja beds, series.|Pebbly arkose, sandstone, siltstone, shale, some conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Mordor Igneous Complex|25731|Mordor Complex|12319|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Stenian|1132|5||intrusion|Stenian|1200||||||NT|Yes|46830|48992|Langworthy A.P. (in Shaw & others, in preparation)|01-FEB-79||01-MAR-79|Defined 1980. See also Mordor Complex. Both versions of the name seem to be in current use [CEB Feb2000]. Emplaced at 1132+/-5Ma in the Strangways Range area near southern margin of the Aileron Province.|Syenite, monzonite, diorite, phlogopite shonkinite, metamonzonite, ultramafic rocks containing phlogopite, altered phlogopite-rich ultramafic rocks|intermediate intrusive rock|||Y||17-JAN-23
Moroak Sandstone|30269|Moroak Sandstone Member|29293|||Yes|Formation, beds|Formal|Variation of published name|Defined|Maiwok Subgroup|25195|||Ectasian|1324|4|inferred, intrusive relationship|deposition|Ectasian|1308|41|inferred, underlying unit||2.5|482.9|NT|No|70897|23937|Young D.|07-NOV-06|||Replaces Moroak Sandstone Member (of the former McMinn Formation). Also replaces the informal "Broadmere Sandstone member" (of the now abandoned Cobanbirini Formation on TANUMBIRINI and BAUHINIA DOWNS). Occurs in the Beetaloo Sub-basin. Potentially economic reservoir target. The type section on the northern slopes of Mount McMinn is no longer accessible so a new type locality needs to be selected.|Thinly to medium bedded, medium to fine quartz sandstone with coarse, quartz-granule-rich intervals up to 1m thick near base.  Cross-stratification, symmetric ripples, interference ripples, moulds of rip-up clasts, and synaeresis cracks are common.|siliciclastic sedimentary rock|||N||07-SEP-23
Morphett Creek Formation|12356|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tomkinson Creek Group|18318|||Statherian||||deposition|Statherian|1780||inferred, underlying unit|||3200|NT|Yes|33307|35771|Mendum J.R., Tonkin P.C. (submitted by D.E. Gardner)|25-MAY-77|Wells, A.T.|||Sandstone and pebbly sandstone; siltstone; thin to medium beds of intraformational conglomeratic sandstone; chertified laminated dolostone; stromatolites; pebble to cobble conglomerate; evaporite pseudomorphs; enterolitihc and nodular chert.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Airy Orthogneiss|24389|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Harverson Suite|30858|Statherian|1799|3|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1820||||||NT|Yes|48992|48992|A.J.Stewart|18-JUN-74|Wells, A.T.|12-NOV-76|SHRIMP dating 2006|Coarse porphyritic granitic augen gneiss with microgranitic dykes.|high grade metamorphic rock|||Y||17-JAN-23
Mount Baldwin Formation|12476|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|Shadow Group|37961|||Terreneuvian|||inferred, biostratigraphic correlation|deposition|Ediacaran||||maximum depositional age|100|300|NT|Yes|44327|48990|Walter M.R.||Passmore, V.L.|26-MAY-80|Redefined (Walter 1980), to exclude upper dolostone now part of Red Heart Dolostone. Also removed from Mopunga Group in 1980. Maximum depositional age from SHRIMP U-Pb detrital zicon analyses, with youngest age cluster at ca 0.67 Ga.|Quartz sandstone, sublithic sandstone, quartz greywacke, siltstone, shale and minor subarkose. Rare granule-bearing beds and pebble-sized claystone intraclasts; prominent cross-beds throughout; various ichnofossils.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Mount Basedow Gneiss|12501|||||Yes|Formation, beds|Formal|Other new published name|Described|Kakadu Group|9110|||Paleoproterozoic|2025|||deposition|Paleoproterozoic|2284|18|isotopic, U/Pb-Pb/Pb ion probe|||1500||No|35140|||||||Well foliated and banded, fine to coarse gneissic meta-arkose, micaceous quartzite and feldspathic quartzite, granitoid gneiss; cross-bedding is preserved in places; interbanded biotite-rich gneiss and schist.|high grade metamorphic rock|||N||17-JAN-23
Mount Birch Sandstone|12510|Mount Birch Sandstone""|12509|||Yes|Formation, beds|Formal|Variation of published name|Defined|Nathan Group|26072|||Calymmian||||maximum depositional age|Statherian|1629|24|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||100|NT|No|44332|23937|||||Jackson et al (1987) proposed abandoning this name and replacing it with Smythe Sandstone Mbr of the Balbirini Dolomite with which it equates, but original name reinstated in URAPUNUNGA and ROPER RIVER (2001). Formerly classed in McArthur Group.|Feldspathic quartz sandstone: medium to coarse grained, cross-bedded, commonly dolomitic with scattered small pebbles and intraclasts; basal conglomerate in type area|medium-coarse grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Mount Birnie beds|12516|Mount Birnie Beds|12511|||Yes|Formation, beds|Informal|Variation of published name|Described|Shadow Group|37961|||Middle Cambrian|||||Early Cambrian||||||||No|32576|||||||Massive ferruginous sandstone, cross-bedded sandstone, conglomerate, red and green shale, mudstone and dolomite; basal tillite.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Mount Bleechmore Carbonatite|79394|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||Proterozoic||||eruption|Proterozoic||||||||No|69427||||||Probably an invalid name. Appears to be different rocks to Mount Bleechmore Granulite, Mount Bleechmore Metamorphics. Also called the Bleechmore dykes. A swarm of carbonatite dykes, in the same area but distinct from the Mud Tank Carbonatite. Considered to be a vermiculite resource in a 500x50 to 100 m. area in 2003.Investigated for rare earths in 2011.|||||Y||27-APR-23
Mount Bleechmore Granulite|26755|||||Yes|Formation, beds|Formal|Other new published name|Defined|Strangways Metamorphic Complex|17395|Jervois Suite|30860|Statherian|1771||||Statherian|1800||||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|25-JUN-74|Defined as Precambrian. Geol. Prov: eastern Arunta Inlier. See also Bleechmore Metamorphics also used 2013.|Sillimanite-garnet-biotite-feldspar-quartz gneiss, garnet-potassium feldspar-quartz migmatite; minor mafic granulite; plutonic migmatite; rare calcareous pelitic gneiss, calc-silicate rock.|high grade metamorphic rock|||N||17-JAN-23
Mount Bonner Sandstone|12528|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Calymmian|1589||inferred, overlying unit|minimum depositional age|Statherian|1712|5|inferred, underlying unit|maximum depositional age||150|NT|No|42597|43010|||||Age: Statherian - Calymmian.The maximum age is constrained from the unconformably underlying Yanungbi Volcanics (Spencer Creek Group, Rawlings et al 1997). Dating of Mount Bonner Sandstone itself produced a MDA of 1815+/-9 Ma.|Polymict conglomerate, pebbly quartzose sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Bonnie Formation|27066|Kapalga Formation|23684|||Yes|Formation, beds|Formal|Resvd name published|Defined|South Alligator Group|17111|||Orosirian|1861|4|inferred, overlying unit|deposition|Orosirian|1863|2|inferred, underlying unit|||850|NT|Yes|38349||P.G.Stuart-Smith|17-JAN-80||12-MAR-82|Intruded by Cullen Supersuite. Hosts numerous gold deposits as well as the Mount Bonnie and Iron Blow Zn-Pb-Cu-Au deposits and the Hayes Creek Sn deposit.|Interbedded carbonaceous sericitic and commonly pyritic or chloritic slate, phyllite, mudstone and siltstone; fine to coarse feldspathic metagreywacke; ferruginous phyllite (metasiltstone) with chert bands, lenses and nodules|metasedimentary siliciclastic rock|||N||17-JAN-23
Mount Bundey Granite|12554|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Mount Bundey Suite|79363|Orosirian|1825|||intrusion|Orosirian|1831|6|isotopic, U/Pb-Pb/Pb, TIMS||||NT|No|44315|44314|||||Pine Creek Province. Pet Desc on Tech File D/52-4. Part of the Mount Bundey igneous suite.  Intrudes the Mount Partridge and South Alligator Groups.|Pink porphyritic biotite granite, coarse biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Mount Bundey Suite|79363|Mount Bundey igneous suite|40047|||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic||||||||No|69420||||||Of Stuart-Smith el al. (1993 and Wyborn et al (1997). Unclear if NTGS uses these Suites or just reporting others' use. Included Mount Bundey Granite, Mount Goyder Syenite. May be a formalisation of the informally-named Mount Bundey igneous suite (unit no. 40047).|Granite, syenite.|acid intrusive rock|intermediate intrusive rock||Y||17-JAN-23
Mount Chapple Metamorphics|12580|Mount Chapple granulite|23814|||Yes|Formation, beds|Formal|Resvd name published|Redefined|Narwietooma Metamorphic Complex|29528|Narwietooma Suite|33045|Statherian|||||Statherian|1774|2|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|49831|43503|||||Hermannsburg 1:250 000 sheet area. Arunta Block. Subjected to two episodes of high-grade metamorphism: Strangways 1725 +/- 11 Ma, and Chewings 1591 +/- 6 Ma, events. Protolith age of 1774 +/- 2 Ma.|Mafic and felsic granulites; intermediate granulite and gneiss; quartzofeldspathic gneiss, felsic granulite with minor mafic granulite; gneissic charnockite; migmatitic metasedimentary rocks.|high grade metamorphic rock|||N||17-JAN-23
Mount Cornish Formation|12596|Mount Cornish Beds|12594|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Aroota Group|37960|||Cryogenian|||inferred, geological correlation|deposition|Cryogenian|||inferred, geological correlation||12|680|NT|Yes|44327|48990|Walter M.R.|26-APR-80|Passmore, V.L.|26-MAY-80||Poorly sorted, medium to very thickly bedded, blue-green diamictite with interbeds of varvite and siltstone; minor sandstone, arkose and dolostone.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Currie Conglomerate|12609|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Cambrian|500|||deposition|Ediacaran|590|||||6100||No|48863|48864|||||Defined by Forman (1955). Age of contained rhyolite clast from Musgrave Block rocks: 1062+/-6Ma. (Kober Pb-Pb age).|Conglomerate containing clasts of sandstone, quartzite, felsic and mafic volcanics, granite, gneiss, mafic intrusives.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Davenport Diamictite Member|24395|||||Yes|Member, phase|Formal|Resvd name published|Defined|Mount Doreen Formation|12639|||Ediacaran||||deposition|Ediacaran||||||77|NT|Yes|37537|45155|A.T.Wells|15-SEP-77|Wells, A.T.|01-OCT-77||Polymictic diamictite; subrounded, faceted and striated erratics; green matrix, poorly sorted siltstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Mount Davis Granite|12627|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Saunders Suite|31734|Orosirian|1800|||intrusion|Orosirian|1820|||||||No|45022||||||Pine Creek Province. Of the Cullen Supersuite (Cullen Batholith). Intrudes Burrell Creek Formation. Also listed in Shoobridge Suite [?] p5:20 Geology and Mineral Resources of the NT, 2013.|Pink, medium to coarse equigranular biotite leucogranite and coarse porphyritic biotite leucogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Mount Deane Volcanic Member|27660|||||Yes|Member, phase|Formal|Resvd name published|Defined|Wildman Siltstone|24105|||Orosirian|2026||isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|2026||isotopic, U/Pb-Pb/Pb ion probe|||150|NT|Yes|39069||P.G.Stuart-Smith|17-JAN-80|Brakel, A., Abell, R.|31-MAY-82|Within the Mount Partridge Group.|Altered mafic volcanics, in places vesicular or brecciated.|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Dobbie Granite|23816|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1662|25|isotopic, K/Ar|intrusion|Statherian|1662|25|isotopic, K/Ar||||NT|No|46959|48992|R.G.Warren|01-SEP-77||||Coarse-grained leucocratic muscovite granite|acid intrusive rock|||Y||17-JAN-23
Mount Doom Ultramafics|77201|||||Yes|Formation, beds|Informal|Other new published name|Briefly described||||||||||||||||||No|62595||||||Hosts the Mithril Prospect. Local mine name for sub-unit of the Mordor Igneous Complex?|Pyroxenite and peridotite.|ultramafic intrusive rock|||Y||17-JAN-23
Mount Doreen Formation|12639|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Ediacaran||||deposition|Cryogenian||||||350|NT|Yes|30258|45155|||Wells, A.T.|19-DEC-77||Tillite, dololutite, shale, sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Dunkin Schist|41952|Mount Dunkin schist|24397|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic|||||||NT|Yes|8222||||||Definition card for Mount Dunkin schist but applies equally to the formalised Mount Dunkin Schist. Partial lateral correlative of Lander Rock Formation.|Sillimanite schist and gneiss|high grade metamorphic rock|||N||17-JAN-23
Mount Eclipse Sandstone|12672|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Carboniferous|330|||deposition|Upper Devonian|370|||||3000|NT|No|30258|45155|||||Age likely to be based on fossils and correlations. Hosts the Malawiri, Minerva and Walbiri sandstone type U deposits. A shallow gas flow has been recorded in this unit.|Arkosic sandstone and conglomeratic sandstone, greywacke, minor conglomerate; plant and trace fossils.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Mount Fawcett Member|37867|Fawcett Member|35329|||Yes|Member, phase|Formal|Variation of published name|Defined|Badalngarrmirri Formation|26360|||Paleoproterozoic||||deposition|Paleoproterozoic||||||240|NT|No|24049|24048|||||Definition card -see Fawcett Member. Within the Parsons Range Group.|Siltstone: laminated to thin-bedded; sandstone: glauconitic, thick-bedded, cross-bedded coarse to very coarse-grained, silicified stromatolitic dolostone at base.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Freeling Schist|41953|Mount Freeling schist|24399|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|8222||||||Definition card for Mount Freeling schist but applies equally to the capitalised version. Partial lateral correlative of Lander Rock Formation.|Schist, gneiss, quartzite, quartz-rich metasediments|metasedimentary rock|||N||17-JAN-23
Mount Goodwin Subgroup|75073|Mount Goodwin Formation|12760|||Yes|Subgroup|Formal|Variation of published name|Redefined|Kinmore Group|9623|||Olenekian|||||Changhsingian||||||||No|69452||Gorter, J. D. (Eni Australia), Nicoll, R.S. (GA)|19-MAR-09|||Rank proposed to be raised from Formation. Upper unit of the Kinmore Group. Composed of (base to top) Penguin Formation, Mairmull Formation, Ascalon Formation, Fishburn Formation (revision in prep. Mar 2009). Also published as such in 2013. See also Mount Goodwin Sub-group.|Shale, claystone, siltstone and minor sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Gordon Sandstone|12764|Mount Gordon Formation|68990|||Yes|Formation, beds|Formal|Other new published name|Defined|Bullita Group|2914|||Mesoproterozoic||||deposition|Mesoproterozoic||||||11|NT|No|30004|48943||||||Blocky, white to yellow, medium-bedded, fine to medium quartz sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Goyder Syenite|27965|Mount Goyder Granite|12766|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Mount Bundey Suite|79363|Orosirian|1820|||intrusion|Orosirian|1850||||||NT|No|44314|44314|||||Pine Creek Province. See also Lexicon. Pet Desc on Tech File D/52-4. Intrudes the Mount Partridge and South Alligator Groups.|Cumulate-textured coarse-grained syenite. I-type.|intermediate intrusive rock|||Y|I-type|17-JAN-23
Mount Harris Basalt|12780|||||Yes|Formation, beds|Formal|Defined variation of published name|Redefined|Tjauwata Group|36772|||Stenian|1040|||eruption|Stenian|1080|||||2000|NT|Yes|48863|65256|||Kruse, P.D.|21-JAN-02|Type Locality: 24o40' 35.69S, 129o24' 50.91E (WGS 84).  Redefined by Edgoose, C.L. and Close, D.F. after Forman (1966). See also Mount Harris Volcanics. Intruded by veins of Walu Granite. At Mt Harris this basalt is thrust over Dean Quartzite.|Metamorphosed basalt, basaltic tuff, conglomerate, and quartzite|basic volcanic rock|metamorphic rock||N||24-MAY-23
Mount Hay Granulite|12786|Mount Hay basic granulite|12788|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Narwietooma Metamorphic Complex|29528|Narwietooma Suite|33045|Statherian|1700|17|inferred, structural relationship||Orosirian|1803|5|isotopic, U/Pb-Pb/Pb ion probe|||3000|NT|Yes|39566|43503|||||Also formerly known as Mount Hay granulites. Hermannsburg 1:250 000 sheet area. Arunta Block. Protolith age of 1803 +/- 5 Ma.Metamorphosed 1700 +/- 17 Ma.|Mafic granulite, minor plagioclase-rich mafic granulite, felsic granulite, rare metasediments|high grade metamorphic rock|||Y||17-JAN-23
Mount Hendry Formation|12792|||||Yes|Formation, beds|Formal|Variation of published name|Described|Narpa Group|37962|||Early Cambrian||||deposition|Neoproterozoic||||||||No|33482||||||Probably basal Thorntonia Limestone. Term recommended to be discontinued in 1972, but use continues in Qld. In 2013 Geology of Queensland and also in GSQ Detailed Geology layer in GeoResGlobe 2020.|Conglomerate, feldspathic sandstone, shale, mudstone and dolomite|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Hooper Sandstone|12798|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Mount Partridge Group|13012|||||||deposition|||||||||No|35140||||||Superseded by Mount Hooper beds?|Interbedded medium quartz sandstone, arkosic sandstone, siltstone, meta-siltstone, phyllite, coarse quartzite and feldspathic quartzite, pebbly in places, with minor conglomerate beds.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Ida Granite|12816|Ida Granite|8641|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Jinka Suite|30861|Paleoproterozoic||||intrusion|Paleoproterozoic|1713|||||||No|39888||||||See also Ida Granite definition.|Gneissic biotite granite, rare monzogranite.|acid intrusive rock|||Y||17-JAN-23
Mount Isa Group|12822|Mount Isa Shale|12826|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Statherian|||inferred|deposition|Statherian|1668|8|isotopic, U/Pb-Pb/Pb ion probe||4500|7500|QLD|Yes|44517|30535|Derrick G.M.||Staines, H.R.E.|05-MAY-76|Isa Superbasin (Geology of Queensland 2013, p40, 42). Age range from constituent units.|Siltstone, shale, commonly dolomite, minor sandstone, conglomerate; metasediments.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Mount John Shale Member|12840|||||Yes|Member, phase|Formal|Other new published name|Defined|Wade Creek Formation|33982|||Mesoproterozoic||||deposition|Mesoproterozoic|1128|110|||||WA|No|44317|45047|||||Defn of Mount John Shale on Tech File SE/52-6.  Same as Mount John Member,  Mount John Shale. Are any still current? This name is Defined, but date is old? Need to confirm.|Grey-green siltstone, mudstone, and fine- to coarse-grained sandstone.|fine grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Mount Lamb Suite|83008|||||Yes|Group, Suite|Formal|Reserved|Defined|||||Orosirian|1845||inferred, isotopic correlation||Orosirian|1855||inferred, isotopic correlation||||NT|Yes|||Schofield, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Named after Mount Lamb, which lies towards the centre of the area that is intruded by the constituent units of this suite. The main diagnostic characteristics for the Mount Lamb Suite are an age of between 1855 and 1845 Ma, implying broadly comagmatic emplacement, and a geographic location within the East Tennant area. Although there is some variation in chemistry, the majority of constituent units are felsic in composition. Francis Dam Granodiorite has been nominated as the type unit as it is intersected extensively in drill core NDIBK09, is robustly dated and is centrally located within the known extent of the Mount Lamb Suite.|Although there is some variation in chemistry, the majority of constituent units are felsic in composition.|acid intrusive rock|||Y||27-APR-23
Mount Laughlen Quartzite|41995|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Precambrian|||||Precambrian||||||||No|9199|||||||Quartzite, muscovite schist.||||N||17-JAN-23
Mount Les Siltstone|12886|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Fickling Group|6631|||Statherian|1640|7||deposition|Statherian|1640|7|isotopic, U/Pb-Pb/Pb ion probe||55|90|QLD|Yes|35640|49001|Sweet I.|01-DEC-75|Staines, H.R.E.|24-JUN-76|Age refined by NABRE project. Discrepancy in parent group - Fickling group or McNamara Group? The probable source of hydrocarbons deposited in Walford Dolomite.|Interbedded, fine-grained sandstone, siltstone and shale with occasional thin dolostone beds; shales are carbonaceous, dolomitic and pyritic, with local talus breccias.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Mount Litchfield Granite|27843|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Allia Creek Suite|39136|Paleoproterozoic|1768|16|isotopic, Rb/Sr|intrusion|Paleoproterozoic|1850||||||NT|No|45022||||||See also Litchfield Granite, Litchfield Complex.|Non-foliated to moderately foliated quartz monzonite and granodiorite, associated tourmaline-bearing pegmatites.|acid intrusive rock|||Y|S-type|17-JAN-23
Mount Oxide Domain - moderately magnetic rocks 79898|79898|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Interpreted unit for basement geology work of A.J. Stewart. Appears on the Glenormiston 250k map sheet.|Unknown.||||U||17-JAN-23
Mount Oxide Domain - strongly magnetic rocks 79916|79916|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. Appears on the Glenormiston 250k map sheet.|Unknown.||||U||17-JAN-23
Mount Oxide Domain - weakly magnetic rocks 79933|79933|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Mount Parker Sandstone|13010|||||Yes|Formation, beds|Formal|Unknown or process pending|Defined|||||Mesoproterozoic|1000|||deposition|Mesoproterozoic|1200||||300|770|WA|No|44317|45140|||||Texas Downs Basin - mapped as Texas Downs Formation - BOW 1 : 100 000 map sheet. Also described as Mesoproterozoic. Superseded by Mount Kinahan Sandstone? or Mount Parker Formation?|Well sorted thinly bedded medium grained quartz sandstone, medium to coarse sublithic arenite and minor pebble conglomerate with siltstone locally near the base; low angle cross bedding is common, and clay pellets occur on bedding planes in places|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Mount Partridge Group|13012|Mount Partridge Formation|27845|||Yes|Group, Suite|Formal|Other new published name|Defined|Woodcutters Supergroup|72988|||Orosirian|2019|4|isotopic, U/Pb-Pb/Pb ion probe||Paleoproterozoic|2284|18||||5000|NT|Yes|38239||Needham, R.S.||Brakel, A.|14-FEB-86|Defined 1986. Includes: Wildman Siltstone, Mundogie Sandstone. Intruded by Shoobridge, Burnside, Margaret, Fenton and Cullen Granites, and Zamu Dolerite. Min age from volcanics near top of Wildman Siltstone, near top of Mount Partridge Group.|Sandstone, siltstone, shale, quartzite, arkose, conglomerate, dolomite.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Partridge Group - hornfels|79986|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Orosirian|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Hornfels.|metasedimentary rock|||N||17-JAN-23
Mount Peake Gabbro|79324|||||Yes|Formation, beds|Informal|Resvd name published|Briefly described|||||Stenian|1053|24|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|Stenian|1062|21|isotopic, U/Pb-Pb/Pb ICP-MS||||NT|Yes|71349||Donnellan, N., Beyer, E. (NTGS)|10-FEB-16|Normington, V.|11-FEB-16|Arunta region. Hosts the the Mount Peake Fe-V-Ti deposit. PROPOSED PUBLICATION: Whelan JA, Beyer EE and Donnellan N, 2016.  1.4 billion years of Northern Territory geology: insights from collaborative U-Pb zircon and baddeleyite dating, in: 'Annual Geoscience Exploration Seminar (AGES) 2016 Record of abstracts.' Northern Territory Geological Survey Record 2016-XXX.|Olivine gabbro, gabbro, leucogabbro, magnetite-rich olivine gabbro and minor ultramafic rocks.|basic intrusive rock|ultramafic igneous rock||Y||17-JAN-23
Mount Porter Granite|27050|||||Yes|Formation, beds|Formal|Other new published name|Described|||Margaret Suite|31736|Paleoproterozoic|1820|||intrusion|Paleoproterozoic|1850|||||||No|39679||Needham, R.S.|13-JUL-83|||Pine Creek Province. Within the Cullen Supersuite. Now part of Allamber Springs Granite?|Coarse grained porphyritic biotite and biotite-hornblende granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Mount Reid Rhyolite|36064|Mount Reid Formation|30317|||Yes|Formation, beds|Formal|Variation of published name|Redefined|||||Orosirian|1847|16|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1847|16|isotopic, U/Pb-Pb/Pb ion probe|||||No|23398|23937|||||Originally called Mount Reid beds.  Intruded by Urapunga Granite.  Age: 1847+/-16Ma (SHRIMP U-Pb, Page et al, 2000). As Mount Reid Formation, was previously included in Vizard Group, but now (2013) considered part of older Urapunga Inlier.|Rhyolitic volcanics intruded by probably comagmatic granite and porphyry|acid volcanic rock|acid intrusive rock||N||17-JAN-23
Mount Rigg Group|13064|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Calymmian|1500||inferred||Statherian|1705||inferred|||700|NT|No|46679|43010|||||For the history of nomenclature of this group and its constituent formations see summary by Plumb and Roberts (1992) in Roper region: URAPUNGA and ROPER RIVER Explan. Notes (2001). Rocks deformed by the Gulpuliyul impact structure. Arnhem Shelf, McArthur Basin.|Cyclic coarse-grained chertified evaporitic-stromatolitic-ooidal dolostone, sandstone, siltstone. ?minor conglomerate and mudstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Sanford Formation|13087|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Calymmian||||||200|NT|No|28255|48943|||||Birindudu Basin.|Dolomitic siltstone interbedded with fine sandstone; minor chert, dolostone and claystone|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Shepherd Rhyolite Member|27067|||||Yes|Member, phase|Formal|Resvd name published|Defined|Plum Tree Creek Volcanics|15334|||Orosirian||||eruption|Orosirian|||||||NT|Yes|41294||P.G.Stuart-Smith|30-MAR-83|Brakel, A.|25-OCT-83|Within the Edith River Group.|Cream-purple banded fine siliceous massive rhyolite. In places flow-banded and flow-top breccia. Weathers buff or brown-orange, and from a distance commonly looks like Kombolgie Formation sandstone, especially when cliff-forming.|acid volcanic rock|||N||17-JAN-23
Mount Smith Metamorphics|13103|Mount Smith metamorphics|27051|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|1777|19|isotopic, U/Pb-Pb/Pb ion probe|||||No|39921|||||||Biotite-muscovite metapelitic schist, semi-pelitic gneiss and meta-greywacke, with rare muscovite schist; locally contains andalusite and cordierite; rare fine fibrolite development.|metasedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Solitaire Sandstone|80497|||||Yes|Formation, beds|Informal|Other new published name|Mentioned||||||||||||||||||No|63866||||||Shown as Mt Solitaire Ssts in time space plot with a max deposition age within the 1850-1800 Ma range (~1820 Ma). Probably an informal name for sandstones in the Mount Solitaire sheet area. May be equivalent to Ware Group?|Sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Stafford Granite|13106|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Paleoproterozoic|1818|||intrusion|Paleoproterozoic|1820|||||||No|42146||||||Mount Stafford beds has priority. May have been used for more than one granite body. Tennant Creek 1:250 000 sheet area.|Granite.|acid intrusive rock|||Y||17-JAN-23
Mount Stafford Member|72421|Mount Stafford beds|27090|||Yes|Member, phase|Formal|Variation of published name|Defined|Lander Rock Formation|69780|||Orosirian||||deposition|Orosirian|1866|3||||1300|NT|Yes|62642||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||A higher metamorphic-grade equivalent of Woodalla Member - both parts of the former Mount Stafford beds. Intruded by Anmatjira Orthogneiss. See UNIT DEFINITION.|Spotted and layered, mostly metapelitic and subordinate metapsammitic hornfels (andalusite-corderite-K-feldspar, spinel-corderite-K-feldspar, orthopyroxene-garnet-cordierite-K-feldspar); local quartz-mica schist and phyllite; migmatite; ortho-amphibolite|metasedimentary siliciclastic rock|||N||17-JAN-23
Mount Stafford dolerite|40026|||||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||200||No|23844||||||Fully described, but invalid name. Occurs within the Mount Stafford beds. Intruded by the Anmatjira Orthogneiss.  Used in Mafic-Ultramafic Event Series dataset 2013.|Dolerite, doleritic gabbro, gabbro and gabbronorite; fine-grained, massive and weakly recrystallised.|basic intrusive rock|||Y||17-JAN-23
Mount Swan Granite|13125|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Jinka Suite|30861|Statherian|1713|7|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1724|6|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation||||No|44327|48844|||||Intrudes Brady Gneiss.|Gneissic biotite granite with microcline phenocrysts.|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Mount Thomas Quartzite|28815|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Reynolds Range Group|16061|||Statherian|1773|2|inferred, intrusive relationship||Statherian|1779|14|isotopic, U/Pb-Pb/Pb ion probe|||850|NT|Yes|39855|48992|Stewart A.J.||Strusz, D.L.|03-AUG-73|Intruded by Warimbi Granite [now Warimbi Schist]. Intruded by granite aged 1773 +/- 2 Ma (Worden et al. 2006).|White to grey fine- to medium-grained quartz sandstone; silica cemented, well-sorted, local conglomerate at base.|medium-coarse grained siliciclastic rock|||N||25-JUL-23
Mount Tietkens Granite Complex|23837|||||Yes|Group, Suite|Formal|Unknown or process pending|Defined|||||Statherian|1753|7|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1852|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|48992|48992|R.G.Warren|01-SEP-77|||Also known as Tietkens Granite Complex.  See also the misspelt Mount Teitkens Granite Complex and Mount Tietkins Granite Complex.|Muscovite-biotite granite, minor metamorphic rock and pegmatites|acid intrusive rock|||Y||17-JAN-23
Mount Webb Granite|13203|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Mount Webb Suite|31336|Calymmian|1486|40||intrusion|Statherian|1639|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|29806|45140|||||Co-magmatic with Pollock Hills Formation Felsic Volcanics. Ages: 1486 +/- 40Ma and 1639+/-5 Ma (SHRIMP). Warumpi Province, Arunta Orogen, North Australian Craton.|Metamonzogranite, metasyenogranite, metagranodiorite and metatonalite.|metamorphosed acid igneous rock|||Y||17-JAN-23
Mount Webb Suite|31336|||||Yes|Group, Suite|Formal|STRATLEX Entry|Described|||||Statherian|||||Statherian|1615|||||||No|50369||||||Arunta Province.  Age: ~1615Ma. Example of the Hiltaba Association.|Fractionated granite, with extensive alteration effects incl: sodic-calcic, sericitic and hematite-K-feldspar in granite.|acid intrusive rock|metasomatic rock||Y||17-JAN-23
Mount Wedge Clay|30827|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Eocene||||deposition|Eocene||||||100||No|61385||Lau J.E.|24-JAN-97|||Mount Doreen SF52-12. [Reference previously gave age as Permian.This was an indexing error, now corrected CEB 16-DEC-2011]|Clay, silt, micrite; dark-coloured; shelly; pyritic; lacustrine (littoral carbonate).|regolith|||N||17-JAN-23
Mount Winnecke Formation|13237|Mount Winnecke Sandstone|13240|||Yes|Formation, beds|Formal|Variation of published name|Defined|Ware Group|38831|Birthday Suite|38833|Orosirian|1770|15|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1824|5|isotopic, U/Pb-Pb/Pb ion probe||4800||NT|No|32659|45140|||||Tanami Province. Age: ca.1824+/-5Ma - based on a rhyolite sample (unclear what part of unit). Some detrital zircon ages younger than this. Previously correlated with Reynolds Range Group.|Quartz-lithic sandstone, granule conglomerate. Dacites, rhyolites, pebbly mudstone, pebbly sandstone, brecciated rhyodacite. Rhyolite, granule conglomerate, quartz-lithic sandstone, interbedded sandstone and mudstone, purple mudstone, breccia.|acid volcanic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Mount Winnecke Formation - felsic volcanic facies|72667|||||Yes|Formation, beds|Informal|Variation of published name|Described|Ware Group|38831|||Orosirian||||eruption|Orosirian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Rhyodacite|acid volcanic rock|||N||17-JAN-23
Mount Winnecke Formation - sedimentary facies|72668|||||Yes|Member, phase|Informal|Variation of published name|Described|Mount Winnecke Formation|13237|||Orosirian||||deposition|Orosirian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Sublithic arenite, tuffaceous sandstone and siltstone, acid lava; minor conglomerate, tuff, agglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Zeil Granite|29774|Mount Zeil granulite|23840|||Yes|Formation, beds|Formal|Other new published name|Defined|||Mount Zeil Suite|31337|Statherian|1760|9|isotopic, Sm/Nd|intrusion|Statherian|1760|9|isotopic, Sm/Nd||||NT|Yes|43225|43503|Glikson A.Y. 1985, Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A. 1992|06-MAR-85|||Definiton card for Mount Zeil Granitic Gneiss.[State Convenor Oct 1991].  Intrudes Narwietooma Metamorphic Complex.|Gneissic, migmatitic granite and granodiorite, augen gneiss, rare amphibolite|acid intrusive rock|||Y||17-JAN-23
Mount Zeil Suite|31337|||||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||||Paleoproterozoic|1760||||Paleoproterozoic|1760|||||||No|50369||||||Includes Mount Zeil Granite.|||||Y||17-JAN-23
Mountain Valley Limestone Member|13270|Mountain Valley Member|33047|||Yes|Member, phase|Formal|Other new published name|Defined|Mainoru Formation|11034|||Calymmian|1493||inferred, overlying unit|deposition|Calymmian|||||20|88|NT|No|44471|23937|||||Glauconitic beds originally assigned by Dunn (1963) to this member are now included in the Wooden Duck Member.  Age: >1493Ma. Within the Roper Group.|Green laminated siltstone and mudstone interbedded with limestone.  Limestone is recrystallised, intraclast-rich and constitute 10-20% of total thickness of member.  Member is built up of metre-scale cycles of green mudstone capped by intraclast limestone|carbonate sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Moyle River Formation|13287|||||Yes|Formation, beds|Formal|Other new published name|Defined|Fitzmaurice Group|6698|||Mesoproterozoic|1537||inferred, intrusive relationship|deposition|Paleoproterozoic|1640||isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||3000|NT|No|32309|48938|||||Fitzmaurice Basin.|Silica cemented quartz sandstone, minor siltstone and pebble conglomerate.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Muckaty Sandstone Member|22460|||||Yes|Member, phase|Formal|Resvd name published|Defined|Helen Springs Volcanics|8256|||Early Cambrian||||deposition|Early Cambrian|||||||NT|Yes|24303|24303|Kruse P.D.|21-NOV-94|||HELEN SPRINGS map sheet SE53-10.|A sedimentary unit containing peperite.|siliciclastic sedimentary rock|||N||17-JAN-23
Mud Tank Carbonatite|13301|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Cryogenian|732|5|isotopic, U/Pb|eruption|Cryogenian|735|75|isotopic, Rb/Sr||||NT|Yes|33307|48992|Langworthy A.P., Shaw R.D.||Branch C.T., Brown M.|01-MAR-79|Geological Province: Arunta Block.|Crystalline carbonate rocks; foliated micaceous carbonate rocks, rich in pale brown phlogopite; feldspathic carbonate rocks with variable amounts of sodic plagioclase, clinopyroxene, amphibole and biotite. Significant vermiculite occurs.|exotic composition igneous rock|||Y||17-JAN-23
Mudginberri Phonolite|13318|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Mesoproterozoic|1316|40|isotopic, Rb/Sr||Mesoproterozoic|||inferred|||1|NT|Yes|33186||Needham, R.S.|20-MAR-73|Strusz, D.L.|16-SEP-74|Intrudes Nanambu Complex.|Phonolite dyke swarm.||||N||17-JAN-23
Mulga Creek Granitic Gneiss|39323|Mulga Creek granitic gneiss|24408|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Jennings Suite|30859|Paleoproterozoic|||||Paleoproterozoic||||||||No|61309||||||See Mulga Creek granitic gneiss for definition.|Muscovite-biotite granitic gneiss, minor amphibolite|high grade metamorphic rock|||Y||17-JAN-23
Mulgar Granite|83161|||||Yes|Formation, beds|Formal|Reserved|Defined|||Tennant Creek Supersuite|39127|Orosirian|1846.9|4.5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Orosirian|1853.4|4.8|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|||Schofield, A., Clark, A. (GA)|28-MAR-22|Munson, T. (NTGS)|25-NOV-22|Underlies headwaters of Walkabout Creek. Type interval: Drill hole NDIBK05, down-hold depth from 200.15 m to 293.8 m (EOH). Drilled at 583236mE and 7805105mN (MGA94 zone 53). Drill core is stored at the NTGS core library in Alice Springs. Does not crop out. Magnetic high. In plan view, it is visible as a 60 km long by 20 km wide, east-west trending body. To be defined in AJES article.|Grey to pinkish, potassium-feldspar megacrystic hornblende-biotite granite with lesser amounts of medium- to coarse-grained biotite granite.|acid intrusive rock|||Y||01-FEB-23
Mullaman beds|13380|Mullaman Beds|13377|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Aptian||||deposition|Upper Jurassic|||||15|20||No|31268||||||Replaced by Walker River Formation and Yirrkala Formation in NT. [but used in 2014 Calvert Hills map as misspelling Mullaman Beds] Name still current in QLD?|Quartz sandstone and conglomerate, sandy claystone and siltstone|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Mullera Formation|13391|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Accident Subgroup|37738|||Ectasian|1316|27||deposition|Calymmian|1492|4|||1020|2130|QLD|Yes|44290|44989|||||Defined 1961. SE53-8,12, SE54-9. Age refined by NABRE project. Within the South Nicholson Group.|Micaceous, locally ferruginous siltstone, shale, fine to medium grained lithic to quartzose sandstone, sublithic glauconitic sandstone; minor ironstone, organic-rich shale|siliciclastic sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||09-OCT-23
Mulluk Mulluk Volcanics|13399|Mulluk Mulluk Volcanic Member|27649|||Yes|Formation, beds|Formal|Resvd name published|Defined|Finniss River Group|6669|Gerowie Suite|31730|Paleoproterozoic|1861||inferred, lithostratigraphic correlation|eruption|Paleoproterozoic|1862||inferred, lithostratigraphic correlation|||2000|NT|Yes|40808|40808|Dundas D.L., Edgoose C.J. (submitted by C.J. Edgoose)||Brakel, A.|13-FEB-86|Defn card 1986. Formerly mapped as part of Burrell Creek Formation. Age from correlation with other dated volcanic units. Status uncertain. Used between 1986 and 2010. NTGS appears to have returned to using Mulluk Mulluk Volcanic Member in 2011, 2012 and uses both versions, with an apparent preference for Mulluk Mulluk Volcanics in 2013 Specal Publication 5 [CEB Sep2018].|Dark-greyish green, conchoidally fracturing rhyolite, commonly with a spherulitic texture.|acid volcanic rock|||N||17-JAN-23
Mulyati Granite|33652|Mulyati|30597|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Pottoyu Granite Suite|33649|Mesoproterozoic|1140|||intrusion|Mesoproterozoic|1190||||||NT|Yes|60572|60683|Scrimgeour I., Close D.,Edgoose C.|13-NOV-96||27-JUL-99|PETERMANN RANGES 1:250 000 sheet area. Of the Pitjantjatjara Supersuite.  Formerly part of the Olia Gneiss of Forman (1966a, 1972).|Fine- to medium-grained equigranular K-feldspar-rich foliated biotite granite.|acid intrusive rock|||Y||17-JAN-23
Mumbilla Granodiorite|22471|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Tennant Creek Supersuite|39127|Orosirian|1712|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1849|5|inferred, intrusive relationship|intrusion||||No|43751|60684|Morrison R.S.|25-MAR-91|||Supersedes Gosse River Adamellite, Gosse R. South Adamellite, Gosse R. North Granite, North Seismic Adamellite, South Gosse Adamellite and (in part) Gosse R. East Adamellite (ref:Tennant Creek Explan.Notes,1999, p52 App. - defn. Mumbilla Granodiorite). Is this the same unit as Gosse River East Syenite or are they different bodies? Also supersedes Gosse River East Granite. Note: age for Gosse River East granite is 1712 +/- 5 Ma U/Pb SHRIMP (Compston, 1995). Maximum age constrained by volcanics in the Yungkulungu Formation, which the Mumbilla Granodiorite intrudes.|Biotite-bearing, granodiorite, tonalite, granite; megacrystic; seriate porphyritic to equigranular; locally abundant porphyritic enclaves with rapakivi texture and blue ovoid quartz; abundant metasediment xenoliths; foliated.|acid intrusive rock|||Y||27-APR-23
Mundogie Sandstone|27851|Mundogie Sandstone Member|13441|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Mount Partridge Group|13012|||Orosirian||||deposition|Orosirian|2021|10|inferred, underlying unit|||5000|NT|No|30831||||||Hosts the Mary River Gossan sediment hosted Zn-Cu deposit.|Thickly-bedded, medium- to very coarse-grained, poorly sorted arkose, subarkose, feldspathic arenite, quartzite, conglomerate, phyllite and siltstone.|metasedimentary siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Mungerebar Limestone|13468|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Late Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||30|QLD|No|44543|44309||||||Quartzic and ooid grainstone, dolomitic limestone, chert; dolostone and sandstone interbeds toward base. Diverse fossil fauna.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Munmarlary Quartzite|29251|||||Yes|Formation, beds|Formal|Other new published name|Described|Kakadu Group|9110|||Paleoproterozoic|2025|||deposition|Paleoproterozoic|2530|17|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||200|NT|No|35140|||||||Massive to friable gneissic orthoquartzite, minor schist.|high grade metamorphic rock|||N||17-JAN-23
Munyi Member|26785|||||Yes|Member, phase|Formal|Variation of published name|Defined|Corcoran Formation|27379|||Ectasian|1417|29|inferred, overlying unit|deposition|Calymmian|||inferred||12|23|NT|No|44332|23937|||||Formerly of the Abner Sandstone - now [2001] reassigned to the base of the Corcoran Formation (Maiwok Subgroup, Roper Group). Min age  is maximum depositional age from overlying Velkerri Formation.|Red to brown ferruginous siltstone and fine grained sandstone; thin bedded, desiccation cracks, iron oxide pisolites; cross bedded medium grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Munyu Sandstone|13494|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Redcliff Pound Group|15983|||Tonian|||inferred|deposition|Tonian|1155|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||WA|Yes|29806|45140|Blake D.H.|15-MAR-73|WA SNSC||Murraba Basin, Centralian Superbasin. See also misspelt Munya Sandstone (refid 67163). Conservative max depositional age of 1155+/-14 Ma, although age of deposition known to be much younger based on correlation with Lewis Range Sandstone (which may not be correct). Previously considered part of Redcliff Pound Group. Revised by Haines and Allen (2016, in prep.), who assigned the Lewis Range, Muriel Range and Munyu Sandstones to lower Supersequence 1, while the  remaining Redcliff Pound Group rocks are now considered to be Supersequence 3-4. See 2017 redefinition of  Redcliff Pound Group. For more information see: Haines, P.W., Allen, H.J. 2016. The Murraba Basin: another piece of the Centralian Superbasin jigsaw puzzle falls into place IN GSWA 2016 extended abstracts: promoting the prospectivity of Western Australia: Geological Survey of Western Australia, Record 2016/2, p. 31-35.|Shallow marine to emergent, partly conglomeratic quartz sandstone with planar crossbeds, asymmetric ripples, and reverse and normal grading;  minor grit, breccia, shale, siltstone, limestone and chert; weakly folded.|siliciclastic sedimentary rock|||N||17-JAN-23
Muriel Range Sandstone|13518|Phillipson Beds|15140|||Yes|Formation, beds|Formal|Resvd name published|Defined|Redcliff Pound Group|15983|||Neoproterozoic|800|||deposition|Neoproterozoic|800|||||450|NT|Yes|29812|45140|Blake D.H.|15-MAR-73|||Age: ~800Ma. Previously considered part of Redcliff Pound Group. Revised by Haines and Allen (2016, in prep.), who assigned the Lewis Range, Muriel Range and Munyu Sandstones to lower Supersequence 1, while the  remaining Redcliff Pound Group rocks are now considered to be Supersequence 3-4. See 2017 redefinition of  Redcliff Pound Group.|Quartz sandstone, grit, conglomerate, breccia, shale, siltstone, limestone and chert|siliciclastic sedimentary rock|||N||17-JAN-23
Murphy Metamorphics|13528|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Orosirian|1856|3|inferred, intrusive relationship|deposition|Orosirian|1864.3|5|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|44306||||Munson, T. (NTGS)|01-JUN-23|After Smith and Roberts (1960), BMR Record 1960/070. Desc on Tech File E/53-12 (1960). Best exposure in Murphy's Creek. See BMR Record 1978/32, p11-15 for further description. Intruded by Nicholson Suite. Different from Murphy granite of WA. See Murphy Metamorphic complex. Maximum deposition age. Hosts the Coanjula microdiamond occurrence and minor uranium occurrences.|Metasedimentary rocks: poorly sorted, immature, fine to coarse grained metasandstone; metasiltstone, shale, often ferruginous; quartz-mica schist; locally sheared and brecciated.|metasedimentary siliciclastic rock|||N||09-OCT-23
Murra-Kamangee Granodiorite|26787|Murra-Kamangee Granite|36919|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Allia Creek Suite|39136|Orosirian|1840||inferred, isotopic correlation|magmatic crystallisation|Orosirian|1853|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|22809||Fahey G.M., Fahey J.E. (submitted by G M Fahey)|18-APR-83|Brakel, A.|13-FEB-86|Originally reserved as Murrakamangee Granite. Pine Creek Province. Part of the Cullen Batholith. Includes mafic igneous xenoliths presumed to be Wangi Basics (Woolianna Gabbro).|Biotite granodiorite, tonalite, porphyritic biotite granite, porphyritic biotite microdiorite; commonly garnetiferous, may be weakly to moderately foliated, contains numerous xenoliths.|acid intrusive rock|||Y|S-type|17-JAN-23
Murraba Formation|13529|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Redcliff Pound Group|15983|||Ediacaran||||deposition|Cryogenian|||||350|800|WA|Yes|29806|45140|Blake D.H.|15-MAR-73|WA SNSC||For recent update see: Haines, P.W., Allen, H.J. 2016. The Murraba Basin: another piece of the Centralian Superbasin jigsaw puzzle falls into place IN GSWA 2016 extended abstracts: promoting the prospectivity of Western Australia: Geological Survey of Western Australia, Record 2016/2, p. 31-35.|Sandstone-sublithic and quartz arenite and thin interbeds of chert granule to pebble conglomerate; minor siltstone, shale and dolomite.|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Murrenja Dolerite|24412|Murrenja Dolomite|13551|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Mesoproterozoic|1393||isotopic, K/Ar|intrusion|Mesoproterozoic|1537||isotopic, K/Ar|||200|NT|Yes|40764||C.Edgoose, J.Fahey|20-MAY-83|Brakel, A.|08-JAN-85|Definition says: Intrudes the ?Middle Proterozoic Moyle River Formation and the Early Proterozoic Wagait Granite. Intrudes Fitzmaurice Group and older rocks. [Is (Paleoprot) numerical age in Pine Ck Orogen Solid Geology wrong?CEB Nov 2011]|Altered gabbro, dolerite.|basic intrusive rock|||Y||17-JAN-23
Musgrave Complex|13596|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Mesoproterozoic|1200||||Mesoproterozoic|1550|||||||No|38066||||||Frequently used as a structural or geological province term. GSWA Report 106 (2010, p2) states the Mesoproterozoic to Neoproterozoic Musgrave Province, in central Australia, was previously referred to in Western Australia as the Musgrave Complex (Myers et al.1996).|Metasedimentary and meta-igneous rocks.|metamorphic rock|||N||17-JAN-23
Musgravian gneiss - amphibolite facies|72673|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unit used for Australian 1:1 million geological map, National Maps Project. Also to be used in Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Felsic gneiss, migmatitic grey biotite gneiss, banded biotite gneiss, leucocratic biotite gneiss, quartzite|high grade metamorphic rock|||N||17-JAN-23
Musgravian gneiss - granulite facies 1|72674|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Informal unit used for Australian 1:1 million geological map, National Maps Project. Also to be used for Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Felsic gneiss, quartzofeldspathic orthopyroxene-biotite-bearing gneiss, less commonly with clinopyroxene, garnet and/or hornblende, tonalitic biotite gneiss; rare mafic granulite and pelitic gneiss|high grade metamorphic rock|||N||17-JAN-23
Musgravian gneiss - granulite facies 2|72675|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Peraluminous gneiss, cordierite and sillimanite +/- garnet gneiss, rare mafic granulite and pelitic gneiss, garnet-orthopyroxene-biotite gneiss|high grade metamorphic rock|||N||17-JAN-23
Musgravian gneiss - granulite facies 3|72676|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Mafic gneiss, two pyroxene mafic gneiss; interlayered mafic and felsic gneisses|high grade metamorphic rock|||N||17-JAN-23
Musgravian gneiss - granulite facies 4|72677|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unit to be used for Northern Territory and Western Australia 1:1 million geological maps, National Maps Project.|Garnetiferous granulite-facies metamorphosed early-syntectonic granites, tonalitic biotite gneiss, granitic gneiss, clinopyroxene-hornblende gneiss, porphyritic orthopyroxene granite |high grade metamorphic rock|||N||17-JAN-23
Mutitjulu Arkose|31843|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Pertaoorrta Group|15091|||Early Cambrian|||||Ediacaran||||||||No|24302|24301|Sweet I.P.|16-OCT-97|||Ayers Rock 1:250k sheet area. Formerly the "arkose at Ayers Rock" (Forman, in BMR Report 87). Also formerly included in the Mount Currie Conglomerate.|Coarse to very coarse-grained arkosic sandstone and arkose, trough cross-bedded; granule to pebble conglomerate, fine- to medium-grained arkosic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Myally Subgroup|13635|Myally Beds|13628|||Yes|Subgroup|Formal|Variation of published name|Defined|Haslingden Group|8130|||Statherian|1700||||Statherian|1773|2|isotopic, U/Pb-Pb/Pb ion probe||2500|4000|QLD|Yes|30529||Derrick G.||Staines, H.R.E.|18-MAR-76|Formerly the Judenan beds also. Within the Lawn Hill and Leichhardt Subprovinces. Age: >1750Ma.  Includes Mammoth and Esperanza Cu +/- Au deposits. Part of the 'Western Succession'.|Undivided sandstone, siltstone and quartzite.|siliciclastic sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Myaoola Granite|13641|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Orosirian||||intrusion|Orosirian|||||||NT|No|44299|43010|||||Age: Orosirian|Granite.|acid intrusive rock|||Y||17-JAN-23
Myrtle Shale|13660|Myrtle Shale Member|13658|||Yes|Formation, beds|Formal|Other new published name|Defined|Umbolooga Subgroup|18813|||Statherian||||deposition|Statherian|||||30|100|NT|No|30272|45162||||||Thinly-bedded to laminated, commonly dolomitic siltstone, shale, dololutite (in places stromatolitic) and fine-grained sandstone; halite casts common.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
N'Dahla Member|13665|N'dahla Member|13668|||Yes|Member, phase|Formal|Other new published name|Defined|Parke Siltstone|14883|||Carboniferous||||deposition|Devonian||||||||No|48890|48890||||| Age - Tentatively placed near the Early - Middle Devonian boundary (ie. Emsian-Eifelian) based on fish fauna.|Purplish-brown sandstone and siltstone.|medium-coarse grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Nabarlek Granite|13671|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Jim Jim Suite|30779|Statherian|1780|13|isotopic, Rb/Sr|intrusion|Orosirian|1818|8|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|36085||Needham, R.S.|21-MAR-74|Strusz, D.L.|16-SEP-74|Pine Creek Province. Previously of the Jim Jim Suite which was replaced by David Suite in 2005, but this name change not widely accepted, so NTGS has returned to Jim Jim Suite. K-U-Th rich.|Altered pale pink biotite granite: anomalously radioactive, commonly with north-trending quartz-filled shears; anatectic granite.|acid intrusive rock|||Y||17-JAN-23
Naburula Formation|13676|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Cryogenian||||deposition|Cryogenian||||||8|NT|Yes|46865|45155|||Wells, A.T.|01-OCT-77|Age late Adelaidean. Misspelt as Nabarula Formation on Mount Doreen 1:250 000 map 1996 [96/28213] and 2005 and 2008 editions.|Dark grey to black mudstone, shale and minor siltstone, interbeds of green-grey and brown dolostone, and a basal green diamictite with erratics up to 1m across. A marker bed at the top has weathered, green-grey, laminated dolomudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Nagi Formation|30315|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Vizard Group|30314|||Statherian|||inferred, overlying unit|magmatic crystallisation|Statherian|1631|16|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||220|NT|No|22538|23937|Plumb K.A.|21-JUN-96|||Previously mapped as upper part of the Vizard Formation; now part of the upgraded Vizard group.  Age: 1634+/-4Ma|Dolomitic and feldspathic sandstone, dolomitic siltstone, dolarenite, tuff.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Namarrkon Amphibolite|76184|Zamu Dolerite|27310|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Paleoproterozoic|||inferred||Orosirian|||inferred, intrusive relationship||||NT|Yes|67779|67779|Glass, L.M., Hollis, J.A. (NTGS)|03-OCT-11|Whelan, J., Normington, V.|07-AUG-14|Replaces Zamu Dolerite (of Ferguson and Needham 1978) in part. Occurs within Cahill Formation and Nourlangie Schist.|Equigranular medium-grained mafic amphibolite with moderate schistosity, locally biotite-rich and relatively homogeneous in texture. Composed of pale-green poikilitic hornblende, aggregates of biotite (in type locality only), plagioclase and quartz.|high grade metamorphic rock|||Y||17-JAN-23
Namatjira Formation|24417|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Pertaoorrta Group|15091|||Early Cambrian||||deposition|Early Cambrian|||||||NT|Yes|40740|41233|J.Bradshaw|12-AUG-86|Brakel, A.|11-AUG-86||Mixed carbonate and clastic sequence which is cyclical. Base has cycles comprising brown sandstone, buff to cream carbonate mudstone and shale  grading vertically into cycles of grey oolitic grainstone, carbonate mudstone and shale.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Namerinni Group|38414|Namerinni|30257|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1610|||deposition|Statherian|1660|||||2800||No|23410|24303|||||Reserved as Namerinni (Hussey, 1996). On HELEN SPRINGS sheet.|Quartz arenite, sublithic/lithic arenite, dolostone, mudstone; minor conglomerate; evaporite pseudomorphs locally abundant; stromatolites|siliciclastic sedimentary rock|||N||08-SEP-23
Namoona Group|13724|||||Yes|Group, Suite|Formal|Other new published name|Defined|Woodcutters Supergroup|72988|||Orosirian|||inferred||Orosirian|||inferred|||3500|NT|Yes|35140|41305|Needham, R.S.|26-MAY-78|Brakel, A.|14-FEB-86|Min. age from Stag Creek Volcanics, at top of Group.|Slate, phyllite, schist, basalt.|metasedimentary siliciclastic rock|||N||17-JAN-23
Nanambu Complex|27856|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Paleoproterozoic|2467|13|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|Neoarchean|2520|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|29551||||||Was listed in WA also [mistake?].  ~2500Ma old. Placed in Alligator Rivers Region. See Nanambu granite for date of Page et al (1980): 2470 +/-47 Ma (U-Pb zircon TIMS; whole-rock Rb-Sr)|Massive to foliated muscovite-biotite granite and gneiss, leucocratic muscovite gneiss and granite, augen gneiss, minor biotite-muscovite schist, migmatised and sheared Kakadu Group metasediment at margins.|acid intrusive rock|||Y||17-JAN-23
Nanga|39118|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Donnellan, N.|18-SEP-03|||Mount Peake 1:250 000 sheet area.|||||N||17-JAN-23
Naningbura Dolomite|72291|Naningbura Formation|34087|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Goulburn Group|7636|||Furongian||||deposition|Furongian||||||1128||No|62505||||||See also full description of Zhen et al (2011) in AAP Memoir 42, p441.|A thick dolostone succession with silty dolostone intervals; conodont fauna near top.|carbonate sedimentary rock|||N||17-JAN-23
Nanny Goat Volcanics|41156|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Ware Group|38831|Birthday Suite|38833|Orosirian|1816|7|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1821|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|50315||||||Formerly part of Supplejack Volcanics. Has been referred to as Crusade Dacite, an informal name relating to the Crusade prospect of Otter Exploration, northern Tanami 1:250 000 mapsheet. Formerly included in Mount Winnecke Group. See also variations on unit name. Hosts gold deposits. previously included in Winnecke Suite, now (2013) part of Birthday Suite.|Sandstone: quartz arenite, volcanogenic sandstone; basalt; rhyolite; rhyolitic feldspar-quartz and quartz-feldspar ignimbrites.|acid volcanic rock|basic volcanic rock||N||17-JAN-23
Nappamerri Group|13823|Nappamerri Formation|13821|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Ladinian|||||Changhsingian||||||550||No|42008|63978|||||Cooper - Eromanga Basin. Composite well section - DIO Mount Howitt 1 in Qld & Merrimelia 3 in SA|Red beds; mudstone; siltstone; sandstone; lithic sandstone.|siliciclastic sedimentary rock|||N||31-JUL-23
Napperby Gneiss|27091|Napperby Granite|13833|||Yes|Formation, beds|Formal|Variation of published name|Redefined|||Napperby Suite|30862|Statherian|1775|12|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1780|10|||||NT|Yes|8222|48992|Stewart A.J.||Strusz, D.L.|05-NOV-73|Not related to the Napperby Formation of NSW.|Medium-grained even-layered granitic gneiss, minor porphyritic granite|metamorphosed acid igneous rock|||Y||25-JUL-23
Napperby Suite|30862|||||Yes|Group, Suite|Informal|STRATLEX Entry|Described|||||Paleoproterozoic|1770||||Paleoproterozoic|1780|||||||No|50369||||||Includes Napperby Gneiss. Also referred to as Napperby HHP Suite. The age of many of the constituent units of this suite is poorly defined. Some may be Mesoproterozoic.|I-Type felsic granites.|acid intrusive rock|||Y|I-type|17-JAN-23
Narbarloo Granite|81882|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Molyhil Suite|81819|Statherian|||inferred||Statherian|1792|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|73123||Beyer, E. (NTGS)|05-MAY-20|Munson, T. (NTGS)|25-AUG-22|Named for the North Narbarloo fluorite prospect. Occurs on the HUCKITTA mapsheet. To be published in: the first edition JINKA, Northern Territory 1:100 000 geological map series and explanatory notes, 6052. Northern Territory Geological Survey, Darwin.|Hornblende-biotite granite, foliated to locally gneissic.|acid intrusive rock|foliated metamorphic rock||Y||17-JAN-23
Narbib Deformed Zone|68347|||||Yes|Formation, beds|Informal|Other new published name|Not recorded|||||Proterozoic|||||Proterozoic||||||||No|||||||Structural term.|Sillimanite gneiss; deformed rock; garnet-biotite gneiss; mafic granulite   ||||N||17-JAN-23
Narbib Granulite|25329|Narbib granulite|23863|||Yes|Formation, beds|Formal|Unknown or process pending|Briefly described|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic||||||||No|39887||||||See also Narbib Gneiss.|Interlayered mafic granulite and quartzofeldspathic gneiss|high grade metamorphic rock|||N||17-JAN-23
Naringa Calcareous Member|13859|||||Yes|Member, phase|Formal|Other new published name|Described|Irindina Gneiss|8769|||Paleoproterozoic||||deposition|Paleoproterozoic||||||||No|46868||||||Within the Harts Range Group. See also (may be replaced by) Naringa Gneiss. Age now [2006] believed to be Neoproterozoic to Cambrian.|Flaggy biotite quartzite, calc-silicate rock, biotite gneiss, pale grey quartzite, marble, rare garnet-biotite gneiss|high grade metamorphic rock|||N||17-JAN-23
Narpa Group|37962|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Late Cambrian|||biozone|deposition|Middle Cambrian|||biozone||||NT|Yes|61404|64068|Kruse, P.D.|30-JAN-03|Kruse, P.D.|30-JAN-03|Originally shown as only in NT but assumed extends into Qld because 'Narpa Group, Lower' used in Qld. Undilla Subbasin, Oban Subbasin etc, Georgina Basin (Geology of Queensland 2013, p88-90).|Limestone, sandy limestone, bituminous limestone, siliceous shale, chert, fine grained sandstone, siltstone, phosphorite|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Narwietooma Metamorphic Complex|29528|Narweitooma Metamorphic Complex|31156|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Paleoproterozoic|1760||inferred, intrusive relationship|deposition|Paleoproterozoic|1780||||||NT|Yes|43749||Warren R.G., Shaw R.D.|04-AUG-94|||In HERMANNSBURG 1:250 000 sheet area. Arunta Block. Defined as the misspelt Narweitooma Metamorphic Complex in the 1995 Hermannsburg Explan. Notes. Intruded by: Mount Zeil Granite, Forty Five Augen Gneiss.|Quartzofeldspathic gneiss, felsic granulite, garnet and/or cordierite-bearing metasediments, rare calc-silicate rock|high grade metamorphic rock|||N||17-JAN-23
Nathan Group|26072|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Calymmian||||deposition|Statherian||||||1550|NT|No|39791|45162|||||Previously mapped (Dunn, 1963a,b,c) as Mount Birch Sst, Kookaburra Creek Fm and Yalwarra Volcanic Mbr (McArthur Group).  Differences in lithology have led to redefinition to comprise Mt Birch Sst, Knuckey Fm, Yalwarra Volcs and Walmudga Fm. Age:< 1640 Ma. Radiometric ages from ?tuffite in Balbirini Dolostone (middle of Group).|Cyclic coarse-grained evaporitic-stromatolitic-ooidal dolostone, sandstone, siltstone; minor conglomerate; synsedimentary basaltic sills, sandstone, mudstone|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Neave Sandstone|13949|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Calymmian|1622|32|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||21|NT|No|28255|48943|||||In 1971 said to overlie Gibbie Formation [possible indexing error] but all other references indicate Neave Sandstone underlies Gibbie Formation. Birindudu Basin. Detrital zircon maximum depositional age|Grey-purple, fine to medium quartz sandstone containing feldspar, chert, clay and rock fragments; basal conglomerate contains chert and quartzite clasts.|siliciclastic sedimentary rock|||N||17-JAN-23
Negri Subgroup|27520|Negri Group|13964|||Yes|Subgroup|Formal|Unknown or process pending|Described|Goose Hole Group|23629|||Late Cambrian||||deposition|Middle Cambrian||||||530||No|41840||||||Not same as Negri Volcanics. Of the Goose Hole Group. Includes: Headleys Limestone, Nelson Shale, Linnekar Limestone, Panton Formation.|Micritic and stromatolitic limestone and chert; siltstone, calcareous mudstone; minor feldspathic sandstone.|carbonate sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Nelson Shale|13990|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Negri Subgroup|27520|||Middle Cambrian||||deposition|Middle Cambrian||||||183|WA|No|44965|41840|||||Of the Negri Subgroup (Goose Hole Group).|Maroon and grey gypsiferous shale and mudstone, minor sandstone, laminated limestone.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Neoproterozoic amphibolite-facies metamorphics 76678|76678|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoproterozoic|||||Neoproterozoic|560|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset. [Note: numerical Min Age = Cambrian in both AGSO 1996 and GTS 2004. CEB Feb-2012]|Medium-grade metamorphic rocks, generally with amphibolite-facies assemblages; may have a greenschist overprint|high grade metamorphic rock|||N||17-JAN-23
Neoproterozoic rocks 79415|79415|||||Yes|Formation, beds|Unnamed|Unnamed published|Unpublished|||||Neoproterozoic|||inferred||Neoproterozoic|||inferred|||||No|||||||Neoproterozoic, undivided. Subsurface unit interpreted by Songfa Liu for the Neoproterozoic solid geology of Australia.|Unknown.|unknown|||U||17-JAN-23
Neoproterozoic sedimentary rocks 76672|76672|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Ediacaran|560|||deposition|Cryogenian||||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Neoproterozoic sedimentary rocks 76676|76676|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Tonian|800|||deposition|Tonian|830|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Neoproterozoic to Ordovician sedimentary rocks 76670|76670|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Ordovician|450|||deposition|Neoproterozoic|750|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Neoproterozoic-Cambrian sedimentary rocks, Amadeus Basin 80965|80965|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cambrian|||inferred||Tonian|||inferred|||||No|72034||||||In refID 72034. (GSWA (2016). 1:500 000 Interpreted Bedrock Geology of Western Australia.  Also Subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area.|Sandstone, minor siltstone and conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Nero Siltstone|26075|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Bullita Group|2914|||Mesoproterozoic||||deposition|Mesoproterozoic||||||80|NT|No|28255|48943||||||Siltstone and shale, minor quartz siltstone and quartz sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Neutral Junction Formation|24426|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Shadow Group|37961|||Early Cambrian||||deposition|Early Cambrian||||||39|NT|Yes|42504|42643|Haines P.W., Bagas L.|04-JUL-88|Kruse, P.D.|10-APR-90|Used on BARROW CREEK and ALCOOTA 1:250 000 map.|Silty sandstone and siltstone; micaceous, glauconitic; minor silty glauconitic limestone; abundant lchnofossils.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Newhaven Shale Member|24427|||||Yes|Member, phase|Formal|Resvd name published|Defined|Mount Doreen Formation|12639|||Ediacaran||||deposition|Ediacaran||||||17|NT|Yes|37537|45155|A.T.Wells|17-OCT-77|Wells, A.T.|01-OCT-77||Thinly-bedded, red to purple-red shale; a few thin bands of dolomudstone occur near the base, and bands of poorly bedded, friable iron-stained sandstone, a few metres thick, are present near the top.|fine grained siliciclastic rock|||N||17-JAN-23
Newlands Volcanics|24428|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|Tennant Creek Supersuite|39127|Orosirian|1818|10|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1818|10|isotopic, U/Pb-Pb/Pb ion probe|||2000|NT|Yes|39624|49033|D.H.Blake|10-AUG-83|Brakel, A.|17-FEB-84|Tennant Creek / Davenport Project. Davenport Geosyncline. Within the Hatches Creek Group (Lower Wauchope Subgroup).|Dacitic and rhyolitic ignimbrite, lava and tuff; minor feldspathic/lithic/volcaniclastic/tuffaceous arenite and siltstone.|acid volcanic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Ngadarunga Granite|31355|Ngadurunga Granite|22539|||Yes|Formation, beds|Formal|Resvd name published|Fully described|||Ngadarunga Suite|41826|Statherian|1803|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1880|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|43749||Young D.N.|19-JAN-93|||Misspelt as Ngadurunga when reserved.  Mount Doreen area.  Intrudes Lander Rock beds [?].  2008 ref says 'derived from partial melting of Lander Rock Formation. Gradational contact with surrounding metasediments. 1803 +/- 5 Ma age on adjacent sediments said to record the thermal event responsible for the granite.'|Xenolithic quartz-rich cordierite-sillimanite-garnet-biotite granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Ngalurbindi Orthogneiss|24429|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Napperby Suite|30862|Mesoproterozoic|||inferred, intrusive relationship||Paleoproterozoic|1775|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|9380|48992|A.J.Stewart|14-APR-75|Wells, A.T.|12-NOV-76|Intrudes Napperby Gneiss. See also misspelling Nalurbindi orthogneiss.|Foliated to gneissic megacrystic granite; biotite-bearing and characterised by coarse phenocrysts of K-feldspar with locally developed rapakivi textures.|metamorphosed acid igneous rock|||Y||17-JAN-23
Ngilipitji Conglomerate Member|22544|||||Yes|Member, phase|Formal|Variation of reserved name|Defined|Yarrawirrie Formation|27030|||Statherian|1621|21||deposition|Statherian|1621|21||||200|NT|Yes|44112|24048|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Brakel, A.|01-MAR-95|Blue Mud Bay 1:250 000 map sheet. Age around 1620 Ma. Originally reserved as Ngiliptji Conglomerate. Varied when defined. Within the Balma Group.|Conglomerate: polymict with dominant sandstone clasts, pebble to cobble-size, friable lithic sandstone matrix.|siliciclastic sedimentary rock|||N||17-JAN-23
Nguman Metamorphics|42368|||||Yes|Formation, beds|Formal|Resvd name published|Described|Iwupataka Metamorphic Complex|24318|||Statherian|1600||isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1630|15|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15). Of the Haasts Domain, Warumpi Province. Maximum deposition age.|Interlayered quartzofeldspathic muscovite schist and biotite muscovite schist; tremolite chlorite schist with local massive chlorite; interlayered quartzite and quartz muscovite schist|metasedimentary rock|metamorphosed acid igneous rock||N||17-JAN-23
Ngwrratiji Basalt|83787|Bluebush basalt|83764|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|||inferred|alteration|Statherian|1758|78|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|||Farias, P. (NTGS)|11-JAN-23|Munson, T. (NTGS)|05-SEP-23|Named after Little Lake Surprise (Ngwrratiji) (around 133.95464degreesE 19.81071degreesS (GDA94)). Map sheet: Kelly 5658.  Intersected in drillhole TDD01. ~500m thick. MORB composition and associated with gravity anomaly and nickel mineralisation.To be published: NTGS Rover Record. Farias PG, 2023. Mineral systems characterisation in the context of a new geological framework. Rover field, Northern Territory. Northern Territory Geological Survey, Record 2023-XX. Age is from laser ablation ICP-MS U-Pb apatite dating.|Chlorite-epidote-carbonate-K-feldspar-altered, porphyritic actinolite basalt.|basic volcanic rock|||N||02-OCT-23
Nhulunbuy Suite|80477|||||Yes|Group, Suite|Reserved|Reserved|Reserved||||||||||||||||||No|||Whelan, J. (NTGS)|27-MAR-18|||Named for the town of Nhulunbuy. To be published in Gove-Arnhem 1:100k explanatory notes. Suite to consist of the Wonga Orthogneiss, Drimmie Head Granite, Bawaka Granite and Orunyah Granite.|Suite of syn-tectonic peraluminous felsic intrusions comprising garnet+/-cordierite+/-biotite granite,  foliated granite and granitic gneiss.||||Y||17-JAN-23
Nicholson Granite Complex|14123|Nicholson Granite|14127|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Nicholson Suite|30724|Orosirian|1845|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1856|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|30914|49001|Sweet, I., Gardner, C.M.|01-JAN-81|Wells, A.T.|01-FEB-81|Defined 1981. Mount Isa Province. Replaces both Nicholson Granite, Norris Granite. Top age revised by NABRE project. Different ages from different phases of the granite. In Geology of Queensland 2013, p60. Hosts the Crystal Hill greisen Sn-W deposit and some copper occurences.|Hornblende-biotite adamellite and granodiorite, medium- to coarse-grained, inequigranular. Biotite + muscovite granite and adamellite, medium- to fine-grained, equigranular.|acid intrusive rock|||Y|I-type|17-JAN-23
Nicholson Granite Complex - phase a|72378|||||Yes|Member, phase|Informal|Variation of published name|Described|Nicholson Granite Complex|14123|Nicholson Suite|30724|Orosirian||||intrusion|Orosirian||||||||No|||||||Lithology referring to an informal unnamed unit of the Nicholson Granite Complex to be used for Northern Territory 1:1 million geological map, National Maps Project.|Medium to coarse grained, inequigranular, hornblende-biotite granite and granodiorite|acid intrusive rock|||Y||17-JAN-23
Nicholson Granite Complex - phase b|72379|||||Yes|Member, phase|Informal|Variation of published name|Described|Nicholson Granite Complex|14123|Nicholson Suite|30724|Orosirian||||intrusion|Orosirian||||||||No|||||||Lithology referring to an informal unnamed unit of the Nicholson Granite Complex to be used for Northern Territory 1:1 million geological map, National Maps Project.|Medium to fine grained, equigranular, biotite +/- muscovite granite|acid intrusive rock|||Y||17-JAN-23
Nicker beds|22550|||||Yes|Formation, beds|Informal|Resvd name published|Fully described|||||Statherian|1772|6|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1805|16|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000||No|43631||Blake D.|18-MAY-92|||Mount Doreen 1:250 000 sheet.  Of the Arunta Complex. Intruded by Southwark Granite Suite.  Maximum age of deposition: 1809 +/-11 Ma Pb/PbSHRIMP age.  The beds include a rhyolitic unit with a 1772+/-5 Ma SHRIMP U/Pb zircon age (NTGS-GA Record 2008-003).|Quartzite, muscovite quartzite, feldspathic quartzite, quartz-muscovite schist, metasiltstone, schistose felsic volcanic and volcaniclastic rocks;|metasedimentary siliciclastic rock|metamorphosed acid igneous rock||N||17-JAN-23
Nilyanjurrung Syenite|41446|||Nilyanjurrung Member|22553|Yes|Formation, beds|Informal|Other new published name|Briefly described||||||||||Orosirian|1830|||||||No|50586||||||Has an apparent crystallisation age of 1859 +/-17 Ma (Page, OZCHRON), but this is also likely to include analysis of inherited zircon. Intrudes the well constrained (1830 Ma) Pul Pul Rhyolite. Lith description from unnamed qm unit on p38 of Ferenczi, and Sweet, (2005). Mount Evelyn Explanatory notes, which comes from more detailed description in: Jagodzinski EA, 1999. The facies architecture and geochronology of the subaerial to subaqueous Palaeoproterozoic El Sherana Group, Northern Territory and the submarine Early Devonian Crudine Group, New South Wales: implications for eruption and depositional processes. PhD thesis, School of Geosciences, Monash University, Melbourne.|Dykes and stocks of quartz monzonite porphyry; includes highly porphyritic-megacrystic and sparsely porphyritic variants.||||Y||25-AUG-23
Nimbuwah Complex|25343|Nimbuwah Granite|14152|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||Nimbuwah Suite|31731|Orosirian|1857|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Orosirian|1886|5|isotopic, U/Pb-Pb/Pb, TIMS|intrusion|||NT|Yes|44338|43010|Needham, R.S.|14-FEB-84|Brakel, A.|14-FEB-86|Pine Creek Province. Transitional and lit-par-lit gneiss zones redefined into Myra Falls Metamorphics in ~1984. Unconformable contact with Mamadawerre Sandstone. ?Redefined again in 1992 or 1984 defn finally published? A large number of coalesced plutons of varied bulk compositions emplaced over an extended period (>10 m.y.).|Granitic, granodioritic, dioritic and rare tonalitic plutons and gneissic equivalents: medium- to coarse-grained, massive to foliated, equigranular to porphyroblastic; minor gabbroic components.|metamorphosed acid igneous rock|||Y|I-type|17-JAN-23
Nimbuwah Complex - granite|72396|||||Yes|Formation, beds|Informal|Variation of published name|Described|Nimbuwah Complex|25343|Nimbuwah Suite|31731|Orosirian|1850|||intrusion|Orosirian|1860|||||||No|||||||Lithology referring to an informal unnamed unit of the Nimbuwah Complex to be used for Northern Territory 1:1 million geological map, National Maps Project.|Porphyroblastic granite and granodiorite, gneissic granite, migmatite|acid intrusive rock|||Y||17-JAN-23
Nimbuwah Complex - migmatite|72397|||||Yes|Formation, beds|Informal|Variation of published name|Described|Nimbuwah Complex|25343|||Orosirian|1850||||Orosirian|1860|||||||No|||||||Lithology referring to an informal unnamed unit of the Nimbuwah Complex to be used for Northern Territory 1:1 million geological map, National Maps Project.|Stromatic migmatite, migmatite, biotite gneiss|high grade metamorphic rock|||N||17-JAN-23
Nimbuwah Complex - tonalite|72398|||||Yes|Formation, beds|Informal|Variation of published name|Described|Nimbuwah Complex|25343|Nimbuwah Suite|31731|Orosirian|1850|||intrusion|Orosirian|1860|||||||No|||||||Lithology referring to an informal unnamed unit of the Nimbuwah Complex to be used for Northern Territory 1:1 million geological map, National Maps Project.|Coarse or porphyroblastic granitoid tonalite, garnetiferous in places|acid intrusive rock|||N||17-JAN-23
Ningbing Group|14166|Ningbing Limestone|14169|||Yes|Group, Suite|Formal|Other new published name|Described|||||Upper Devonian||||deposition|Upper Devonian||||||||No|40993|||||||Limestone reef complexes; cyanobacterial limestone, limestone breccia, shale and sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Ninmaroo Formation|14173|Ninmaroo Limestone|14176|||Yes|Formation, beds|Formal|Other new published name|Defined|Cockroach Group|37963|||Tremadocian|||biozone|deposition|Furongian|||biozone|deposition||1000|QLD|No|44273|45052|||||Supersedes N. Limestones and N.Series (Whitehouse 1936). SF54-9,13. Consists of Unbunmarro, Jiggamore, Mort, Corrie and Datson Members. Thickness: 795m in type section at Black Mountain. Interfingers with Tomahawk Formation. Age: 500-485 Ma from 2003 reference. Age names form 2013 reference.|Ooid, peloid, bioclast, intraclast, microbial and mixed-lithology limestone and dolostone; minor quartz sandstone and conglomerate. Microbial carbonate rocks include microbial dololaminite, stromatolitic doloboundstone and stromatolitic biostromes.|carbonate sedimentary rock|medium-coarse grained siliciclastic rock|continental rift|N||17-JAN-23
Njibinjibinj Gneiss|75717|Myra Falls Metamorphics|27515|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Neoarchean|2508|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Neoarchean|2671|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|67479|67779|Glass, L. (NTGS)|08-JUL-10|Munson, T., Glass, L., Beyer, E., Green, M.|03-NOV-10|See also Njibiinjibinj Gneiss, which is a misspelling. Previously known as part of the Myra Falls Metamorphics. Minimum age based on the SHRIMP U-Pb age of a single recrystallised zircon rim of 2508 +/- 8 Ma, Njibinjibinj Gneiss is thought to have experienced metamorphism at this time.|Quartzofeldspathic biotite granodioritic gneiss; strong hematitic and chloritic alteration with secondary remobilisation of silica; moderate gneissic compositional layering with local isoclinal folds.|metamorphosed acid igneous rock|||Y||17-JAN-23
No Mans Sandstone Member|68735|No Mans Member|38510|||Yes|Member, phase|Formal|Variation of reserved name|Defined|Playford Sandstone|37727|||Calymmian||||deposition|Calymmian|1615|15|isotopic, U/Pb||||NT|Yes|62659|65337|Sweet, I.|11-APR-05|Kruse, P.D.|11-APR-05|Reserved as No Mans Member by Rawlings, D. on 19-JUN-2003. Definition by Sweet, I.|Very coarse-grained to granule and pebbly, quartz-rich sandstone, and minor fine-grained sandstone with coarse to pebbly lags. Strongly trough cross bedded on medium to large scale throughout.|siliciclastic sedimentary rock|||N||17-JAN-23
Nolans Dam Metamorphics|41951|Nolans Dam metamorphics|29226|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|8222||||||Definition card for Nolans Dam metamorphics, applies equally to the capitalised Nolans Dam Metamorphics. Partial lateral correlative of Lander Rock Formation.|Cordierite gneiss, quartzofeldspathic gneiss, garnet-biotite gneiss, sillimanite gneiss|high grade metamorphic rock|||N||17-JAN-23
Nome Formation|25346|||||Yes|Formation, beds|Formal|Other new published name|Defined|Sahul Group|16515|||Rhaetian|203|||deposition|Carnian|230||||||NT|No|41532|42442||||||Interbedded sandstone, siltstone and shale; minor coal with minor shallow-marine limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Nongra beds|30717|Nongra Beds|26809|||Yes|Formation, beds|Informal|Variation of published name|Described|Tanami Group|17763|Ware Group|38831|Orosirian||||eruption|Orosirian|1818|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|22446||||||After Nongra Beds of Blake et al (1975). Tanami Province. Also in Pine Creek Geosyncline.|Amygdaloidal quartz-phyric rhyolite, probable lava flow. Interbedded fine and medium vitriclastic sandstone.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Nora Formation|14235|||||Yes|Formation, beds|Formal|Other new published name|Defined|Toko Group|18263|||Darriwilian|||inferred, overlying unit|deposition|Darriwilian|||inferred, underlying unit|||250|NT|No|44327|45052|||||Overlies Tomahawk beds.  Most recent NTGS maps suggest Early Ordovician age.|Thin-bedded micaceous and glauconitic siltstone, claystone, minor dolostone; basal coquinite.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Nora Range Monzogranite|73219|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Frederick Suite|40071|||||intrusion|||||||||No|62580|||||||Pervasively weathered, foliated (magmatic), coarse- to medium-grained, equigranular, biotite monzogranite.|acid intrusive rock|||Y||17-JAN-23
Normanton Formation|14253|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Rolling Downs Group|16267|||Cenomanian|||inferred|deposition|Albian|||inferred, underlying unit|||250||No|44515|44515|||||Originally considered Albian. More recently, Cenomanian. Age: ~94-~91Ma (basis for numerical ages unknown).|Labile sandstone, siltstone, minor mudstone and cone-in-cone limestone.|siliciclastic sedimentary rock|||N||17-JAN-23
Nourlangie Schist|23881|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Orosirian|1860||inferred, intrusive relationship|deposition|Orosirian|1866|11|inferred, underlying unit|||3000|NT|No|38239||P.G.Stuart-Smith|25-OCT-78|||Previously included in Mount Partridge Group, Woodcutters Supergroup. Previously considered probable equivalent of Myra Falls Metamorphics.  Hosts unconformity-related uranium deposits, eg Nabarlek.|Pale brown to grey, crenulated,  quartz-mica schist, mica schist and quartz schist, minor quartzite; commonly feldspathic and garnetiferous, with staurolite and magnetite in places; interbedded buff to grey, commonly graphitic, sericitic or chloritic met|metasedimentary siliciclastic rock|||N||17-JAN-23
Nulchara Charnockite|38102|Nulchara charnockite|38046|||Yes|Formation, beds|Formal|Variation of published name|Described|||Warakurna Supersuite|73257|Mesoproterozoic||||intrusion|Mesoproterozoic|1044|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|24301||||||Felsic intrusion in NT - intrusive contact with underlying Michell Nob Granite. Age: 1044+/-5Ma (SHRIMP U-Pb: Camacho 1997).|Coarse, porphyritic charnockite with clinopyroxene-orthopyroxene-hornblende-biotite and common rapakivi texture|acid intrusive rock|||Y||17-JAN-23
Nullawun Member|36069|||||Yes|Member, phase|Formal|Other new published name|Defined|Mainoru Formation|11034|||Calymmian|1492|4||deposition|Calymmian|1492|4|||42|71.5|NT|No|24051|23937|||||Within the Collara Subgroup (Roper Group).|Red-brown and red-grey siltstone and in-situ shale-intraclast breccia; minor grey-green laminated claystone and thin beds of very fine to medium sandstone. Discontinuous intraclastic limestone near the top. Contains distinctive massive red beds.|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Nungbalgarri Volcanics|14401|Nungbalgarri Volcanic Member|14400|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Kombolgie Subgroup|33373|||Statherian|1729||inferred, intrusive relationship|minimum depositional age|Statherian|1810||inferred, underlying unit|maximum depositional age||200|NT|No|41957|41957|||Beier, P.|25-FEB-99|Milingimbi 1:250 000 sheet area. See also misspelt Nungalarri Volcanics.|Trachybasalt, dacite and rhyodacite: massive flows, vesicular and amygdaloidal near top; columnar jointing; rare pillow structures; rare porphyritic olivine dolerite dykes; minor interbedded sandstone and tuffaceous siltstone.|basic volcanic rock|intermediate volcanic rock||N||17-JAN-23
Nyanantu Formation|14422|Nyanantu beds|14423|||Yes|Formation, beds|Formal|Variation of published name|Defined|Tawallah Group|17902|||Statherian|||inferred|deposition|Statherian|1713|6|inferred, lithostratigraphic correlation||||NT|Yes|42700|42812|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.||Kruse, P.D.|24-FEB-94||Coarse grained pebbly sandstone and cobble boulder conglomerate; immature, poorly sorted.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Nyirripi beds|42398|Nyirripi Beds|69775|||Yes|Formation, beds|Informal|Resvd name published|Described|||||Paleoproterozoic|1644|9|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Paleoproterozoic|1790|12|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|61519||Close, D.|13-DEC-04|||Published as Nyirripi Beds which is probably misspelt and should be Nyirripi beds (see Mount Rennie Interpreted geol. map 1:250K).|Cordierite-sillimanite migmatite and hornfels, garnet-cordierite migmatite, minor orthopyroxene-cordierite hornfels and quartz-absent cordierite granulite|high grade metamorphic rock|||N||17-JAN-23
Octy Formation|24436|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Shadow Group|37961|||Early Cambrian||||deposition|Early Cambrian||||||88|NT|Yes|42504|42643|P.Haines, L.Bagas|17-DEC-87|Kruse, P.D.|10-APR-90|In ALCOOTA  and BARROW CREEK.|Locally glauconitic, predominantly medium-grained, cross-bedded and planar laminated feldspathic quartz sandstone, interbedded with minor siltstone, mudstone and silty sandstone; local thin basal conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Oenpelli Dolerite|14496|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Kombolgie Subgroup|33373|||Statherian|1688|13|isotopic, Rb/Sr|intrusion|Statherian|1723|6|isotopic, U/Pb-Pb/Pb ion probe|||250|NT|Yes|35114||Needham, R.S.|20-MAR-73|Strusz, D.L.|16-SEP-74|Intrudes the Nanambu and Nimbuwah Complexes and Kombolgie Subgroup of McArthur Basin. Total rock Rb-Sr isochron of 1718 +/- 65 m.y. Recently [2009] said to be emplaced ~1723 Ma based on Badeleyite age. Sample geochem. not typical Oenpelli Dolerite. Interpreted deeper-level feeder of the stratigraphically-higher Settlement Creek Dolerite (Rawlings, 2006 - Robinson River Explan Notes).|Porphyritic olivine doleritic sills, ophitic dolerite, granophyric dolerite, serpentinite; textures vary from massive, equigranular, fine-grained dolerite to coarse-grained gabbroic assemblages.|basic intrusive rock|||Y||17-JAN-23
Old Hamilton Downs Gneiss|28161|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Neoproterozoic|||inferred||Mesoproterozoic|||inferred||||NT|Yes|48992|48992|Offe L.|04-NOV-75|Brown, M.C.|31-OCT-78|Card. RDEF as Old Hamilton Downs Granitic Gneiss with State Convenor Oct 1991.  Age inferred from recent NTGS regional mapping 2003-6. Previously considered part of the Wigley Complex, but this name has not been in use for some years [CEB 23-MAR-2020]|Biotite-quartz-feldspar gneiss, locally muscovite-bearing|high grade metamorphic rock|||Y||17-JAN-23
Oliver Formation|14550|||||Yes|Formation, beds|Formal|Other new published name|Described|Woodbine Group|20481|||Late Miocene|7|||deposition|Oligocene|25|||||||No|42053||||||Includes invalidly named Oliver Sandstone Member.|Mainly limestone and dolomite; minor sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Olympic Formation|14563|Olympic Member|14565|||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ediacaran|580||inferred|deposition|Cryogenian|690|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|20|1100|NT|Yes|46865||Preiss W.V., Walter M.R., Coats R.P., Wells A.T.||Beyer, E., Normington,V.|08-DEC-15|Originally of Wells et al.(1967). Redefined in 2015. The Olympic Formation name has been used in both NT (Amadeus Basin) and in WA (Halls Creek Province) - misspelling of Olympio Fm. Together with the lateral equivalent, the Pioneer Sandstone, Olympic Fm is believed to correlate with Marinoan glacial strata of the Adelaide geosyncline. Recent U-Pb isotopic studies of detrital zircons from a sandstone bed within the Olympic Formation yielded a maximum depositional age of 690 +/- 14 Ma (Kositcin et al 2015).|A number of facies which include lenticular units of diamictite, sandstone, siltstone, conglomerate, shale, boulder clay and dolomite in varying proportions.|siliciclastic sedimentary rock|||N||17-JAN-23
One Tree Granite|14590|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Kalkadoon Supersuite|30638|Orosirian|1857|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1860||||||QLD|Yes|37413|49009|R.J.Bultitude, D.H.Blake, P.J.T.Donchak|20-AUG-80|Whitaker, W.|10-DEC-80|DAJARRA 1:100 000 sheet. Replaces Monastery reserved 21/02/80 in error.  Previously mapped as Kalkadoon Granite (Carter and Opik,1963).Age refined by NABRE project [?]. Geology of Queensland (2013) p31, 60 describes One Tree Granite as of Kalkadoon Batholith and Barramundi Orogeny (1870-1840Ma), but apparently undated.|Medium to coarse biotite granite, locally porphyritic, minor microgranite, aplite, pegmatite. Massive to strongly foliated|acid intrusive rock|||Y||17-JAN-23
Ongeva Granulite|14591|Ongeva granulite|24439|||Yes|Formation, beds|Formal|Other new published name|Described|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic||||||||No|39566||||||Part of Jennings Suite?  See Ongeva granulite for definition|Interlayered mafic granulite, felsic granulite, quartzofeldspathic gneiss; some migmatite, rare cordierite gneiss, garnet-biotite gneiss, sillimanite gneiss, biotite gneiss; rare granitoid|high grade metamorphic rock|||N||17-JAN-23
Ongeva Package|76768|||||Yes|Group, Suite|Informal|Other new published name|Described|||||Orosirian|1800||||Orosirian|1810|||||||No|63866||||||Informal name. Accumulated between 1810 and 1800 Ma. Together with Lander Package it is broadly correlative with the Tanami and Ware Groups in the Tanami Region. RefID 64722.  Unit also used in the Mafic-Ultramafic Event Series dataset 2013.|Comprises mafic and felsic protoliths of Strangways Metamorphic Complex and clastic metasediments; carbonates and volcanic-hosted  massive sulphide deposits.|metasedimentary siliciclastic rock|metamorphosed igneous rock||N||17-JAN-23
Oodnarta Diorite|79098|||||Yes|Formation, beds|Formal|Variation of reserved name|Briefly described|||||Statherian||||magmatic crystallisation|Statherian|1725|4|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||||||Eastern Arunta Region, Aileron Province. U/Pb LA-ICPMS zircon dating, Hf analytical data. Maximum crystallisation age of 1725+/-4 Ma, making it the youngest mafic rock in the Aileron Province in the Quartz sheet area.|Quartz gabbro to diorite. Quartz diorite sampled.|intermediate intrusive rock|basic intrusive rock||Y||17-JAN-23
Oolbra Orthogneiss|14595|Oolbra orthogneiss|24442|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Jennings Suite|30859|Paleoproterozoic|||||Paleoproterozoic||||||||No|39887|||||||Orthogneiss, granitic gneiss|high grade metamorphic rock|||Y||17-JAN-23
Oolloo Dolostone|24443|Oolloo Limestone|26822|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Daly River Group|5163|||Guzhangian|||inferred, overlying unit|deposition|Drumian|||inferred, underlying unit|||195|NT|Yes|42012|42012|Kruse P.D.|21-APR-88|||Originally Randal (1962), Malone (1962). Redefined 2014. Now subdivided into two members, extent modified to exclude what is now Florina Formation,  and basis for age changed. See modified definition. Age shown as Cambrian. Unfossiliferous. Originally thought to contain Tremadocian to Floian fossils. The strata containing those fossils was later recognised as a younger, separate unit, the Florina Formation.|Pink-grey dolostone, ooid dolograinstone, stromatolitic doloboundstone and cryptalgal dololaminite, minor dolomitic sandstones toward base. Lower part well-bedded, upper massive.|carbonate sedimentary rock|||N||17-JAN-23
Oolra|37650|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Edgoose, C.|05-NOV-02|||Kulgera 1:100 000 or 1:250 000 map sheet.|Granite|acid intrusive rock|||N||17-JAN-23
Oonagalabi Gneiss Complex|14599|Oonagalabi gneiss complex|14601|||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Proterozoic|||||Proterozoic||||||||No|41242||||||Same as Oonagalabi Gneiss?|Felsic gneiss, mafic granulite, amphibolite.|high grade metamorphic rock|||N||17-JAN-23
Oorabra Arkose|14610|Oorabra Arkose Member|14609|||Yes|Formation, beds|Formal|Variation of published name|Defined|Keepera Group|9375|||Ediacaran|||inferred, geological correlation|deposition|Cryogenian|||inferred, geological correlation||17|1165|NT|Yes|44964||Walter M.R.||Passmore, V.L.|26-MAY-80|Formerly of the Elyuah Formation as the Oorabra Arkose Member;  redefinition of the formation excluded this member.|Medium to pebbly arkose to lithic arkose; locally with block-sized clasts; red micaceous siltstone, shale, conglomerate with glacially faceted and striated clasts; minor dolostone, sandstone.|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Ooradidgee Group|39122|Ooradidgee Subgroup|24444|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Orosirian|1810||inferred, overlying unit|eruption|Orosirian|1853|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|23733||||||Lateral equivalent of 'Lander Package', Arunta region. Dates from Epenarra Volcanics, Treasure Volcanics, Monument Formation.|Felsic ignimbrite, tuff, lapilli tuff and basaltic volcanic rocks; chert; sublithic and lithic arenite and wacke; shale and mudstone; pebble beds and conglomerate|acid volcanic rock|sedimentary rock||N||10-AUG-23
Ooradidgee Group - siliciclastic rocks - moderately magnetic 79917|79917|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|Ooradidgee Group|39122|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. Warramunga Province? Davenport Province?|Siliciclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Ooradidgee Group - siliciclastic rocks - strongly magnetic 79918|79918|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|Ooradidgee Group|39122|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. Warramunga Province? Davenport Province?|Siliciclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Ooradidgee Group - siliciclastic rocks - weakly magnetic 79919|79919|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|Ooradidgee Group|39122|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. Warramunga Province? Davenport Province?|Siliciclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Ooralingie Granite|27297|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Barrow Creek Granite Complex|27283|Ali Curung Suite|33043|Orosirian|1805|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1809|5|||||NT|Yes|42643|42643|Haines P.W., Bagas L.|04-JUL-88|Kruse, P.D.|10-APR-90|Used on BARROW CREEK and ALCOOTA 1:250 000 map sheets. Defined in Barrow Creek explan notes p50 as part of Barrow Creek Granite Complex.  Intrudes Bullion Schist.|Biotite granite with porphyritic K-feldspar, and locally abundant enclaves and xenoliths; minor orthogneiss; and, equigranular to porphyritic biotite and biotite-muscovite granite, respectively.|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Ooraminna Sandstone Member|14614|||||Yes|Member, phase|Formal|Other new published name|Defined|Hermannsburg Sandstone|8291|||Devonian||||deposition|Devonian|||||||NT|No|31566|31566|||||Within the Pertnjara Group.|A uniform succession of planar bedded, cross-stratified, medium-grained quartzic sandstone, with rare siltstone and pebbly intervals.|siliciclastic sedimentary rock|||N||17-JAN-23
Opparinna Metamorphics|38050|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Mesoproterozoic|1603|36|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1603|36|isotopic, U/Pb-Pb/Pb ion probe|||85||No|24302|24301|||||Intruded by the 1150Ma Kulpitjata Suite granite and pegamtite dykes. Age: >1150Ma. A single zircon population in the Kelly Hills has give an age of 1603+/-36Ma.|Quartzite, amphibolite, muscovite-biotite-garnet schist, viridine (Mn-rich andalusite) schist|metasedimentary siliciclastic rock|||N||17-JAN-23
Ordovician sedimentary rocks 76683|76683|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Ordovician|434|||deposition|Lower Ordovician||||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Orion Granodiorite|73222|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||intrusion|||||||||No|62580||||||Part of the composite Lewis Granite (Frederick Suite).|Fine- to medium-grained, equigranular biotite granodiorite.|acid intrusive rock|||Y||17-JAN-23
Ormiston Pound Granite|29772|Ormiston Pound granite|14653|||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|Iwupataka Suite|41816|Calymmian|1575|20|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1603|10|||||NT|Yes|43225|43503|Shaw R.D., Collins W.|11-OCT-95|||Hermannsburg 1:250 000 sheet area. Arunta Complex. See also Ormiston Granite.|Gneissic granite, leucogranite, pegmatite|acid intrusive rock|||Y||17-JAN-23
Orunyah Granite|81664|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Statherian|1712|2|inferred, overlying unit||Orosirian|1872||inferred, geochemical correlation|intrusion||||No|72377||||||Co-magmatic with c. 1872 Ma Bawaka Granite and c. 1962 Ma Drimmie Head Granite, based on similar chemistry and mineralogy.||acid intrusive rock|||Y||17-JAN-23
Osprey Formation|14669|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Sahul Group|16515|||Ladinian||||deposition|Anisian|||||||NT|No|41532|42442|A.J.Mory|02-DEC-86||||Interbedded shale and sandstone; minor carbonate.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Outounya gneiss|69486|Outounya Gneissic Unit|14693|||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||Mesoproterozoic|1540||||Mesoproterozoic|1600|||||||No|65309||||||Gneiss of the 1600-1540Ma period. See also Outounya Gneiss.|Gneiss.|high grade metamorphic rock|||N||17-JAN-23
Overland Sandstone|28141|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Elder Subgroup|26535|||Late Cambrian||||deposition|Late Cambrian||||||230||No|41840||Trendall, A.F.|12-APR-83|||For a report on the Bonaparte and Ord Basins. Of the Elder Subgroup (Goose Hole Group).|White, fine to medium lithic arkose and sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Owen Springs Sandstone Member|14703|||||Yes|Member, phase|Formal|Other new published name|Defined|Hermannsburg Sandstone|8291|||Devonian||||deposition|Devonian|||||||NT|No|31566|31566||||||White, cross-bedded, medium- to coarse-grained sandstone with some pebble-sized clasts (probably of Mereenie Sandstone).|siliciclastic sedimentary rock|||N||17-JAN-23
Packsaddle Microgranite|14735|Packsaddle Granite|14734|||Yes|Formation, beds|Formal|Variation of published name|Defined|||Fagan Supersuite|31308|Statherian|1690|||intrusion|Statherian|1724|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|44306|45162|||||Defn on Tech File E/53-8. One reference to this unit in WA was probably a mistake. Intrudes Wollogorong Formation and Gold Creek Volcanics within the Tawallah Group. Chemically indistinguishable from the central, massive portion of Hobblechain Rhyolite, for which it was probably the feeder.|Red or pink, porphyritic (K-feldspar-quartz), microgranophyric to spherulitic rhyolite and microgranite. Quartz veins common.|acid intrusive rock|||Y||17-JAN-23
Pacoota Sandstone|14744|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Larapinta Group|10184|||Lower Ordovician|||inferred, biostratigraphic correlation|deposition|Furongian|||inferred, biostratigraphic correlation||640|800|NT|No|48838|42354|||||Equiv to Mt Chandler Sandstone, Officer Basin. Includes disarticulated vertebrate fossils. Numerical age range (508 - 480 Ma) from 1991 reference. Important aquifer and oil/gas reservoir.|Mainly a medium-grained, cross-bedded quartz sandstone, with minor coarse sandstone and pebbly beds; local prominent glauconitic bed; marine fossils; contains oolitic ironstones in the Henbury and Lake Amadeus Regions.|medium-coarse grained siliciclastic rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Paleoproterozoic amphibolite-facies metamorphics 76620|76620|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1600||||Statherian|1680|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Medium-grade metamorphic rocks, generally with amphibolite-facies assemblages; may have a greenschist overprint|high grade metamorphic rock|||N||17-JAN-23
Paleoproterozoic amphibolite-facies metamorphics 76621|76621|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1730||||Statherian|1750|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Medium-grade metamorphic rocks, generally with amphibolite-facies assemblages; may have a greenschist overprint|high grade metamorphic rock|||N||17-JAN-23
Paleoproterozoic amphibolite-facies metamorphics 76624|76624|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1870||||Orosirian|1900|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Medium-grade metamorphic rocks, generally with amphibolite-facies assemblages; may have a greenschist overprint|high grade metamorphic rock|||N||17-JAN-23
Paleoproterozoic felsic to mafic volcanics 76617|76617|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1700|||eruption|Statherian|1800|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly a bimodal mixture of mafic and felsic volcanics; may include andesites|basic volcanic rock|acid volcanic rock||N||17-JAN-23
Paleoproterozoic felsic to mafic volcanics 76619|76619|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1800|||eruption|Orosirian|1840|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly a bimodal mixture of mafic and felsic volcanics; may include andesites|basic volcanic rock|acid volcanic rock||N||17-JAN-23
Paleoproterozoic felsic volcanics 76578|76578|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1700|||eruption|Statherian|1740|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic volcanic rocks, including lavas and tuffs. Association may include volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Paleoproterozoic felsic volcanics 76579|76579|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1810|||eruption|Orosirian|1830|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic volcanic rocks, including lavas and tuffs. Association may include volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Paleoproterozoic felsic volcanics 76580|76580|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1850|||eruption|Orosirian|1870|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic volcanic rocks, including lavas and tuffs. Association may include volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Paleoproterozoic felsic volcanics 76581|76581|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1870|||eruption|Orosirian|2000|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic volcanic rocks, including lavas and tuffs. Association may include volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Paleoproterozoic granites 76583|76583|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1670|||intrusion|Statherian|1800|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Paleoproterozoic granites 76586|76586|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1800|||intrusion|Orosirian|1850|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Paleoproterozoic granites 76588|76588|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1850|||intrusion|Orosirian|1870|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic intrusive rocks.  Range in composition from alkali feldspar granite to tonalite; includes associated rocks such as migmatite and minor gabbro and diorite.|acid intrusive rock|||Y||17-JAN-23
Paleoproterozoic granulite-facies metamorphics 76598|76598|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1720||||Statherian|1750|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|High-grade metamorphic rocks, generally with granulite facies assemblages; includes granitic gneisses|high grade metamorphic rock|||N||17-JAN-23
Paleoproterozoic granulite-facies metamorphics 76601|76601|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1820||||Orosirian|1865|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|High-grade metamorphic rocks, generally with granulite facies assemblages; includes granitic gneisses|high grade metamorphic rock|||N||17-JAN-23
Paleoproterozoic granulite-facies metamorphics 76602|76602|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1870||||Orosirian|2000|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|High-grade metamorphic rocks, generally with granulite facies assemblages; includes granitic gneisses|high grade metamorphic rock|||N||17-JAN-23
Paleoproterozoic mafic intrusives 76572|76572|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1620|||intrusion|Statherian|1690|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Dolerite, gabbro and other mafic igneous rocks; commonly as dykes and sills; may include some metamorphosed mafic intrusions and subordinate ultramafic rocks.|basic intrusive rock|||Y||17-JAN-23
Paleoproterozoic mafic intrusives 76574|76574|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1790|||intrusion|Statherian|1800|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Dolerite, gabbro and other mafic igneous rocks; commonly as dykes and sills; may include some metamorphosed mafic intrusions and subordinate ultramafic rocks.|basic intrusive rock|||Y||17-JAN-23
Paleoproterozoic mafic intrusives 76577|76577|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1870|||intrusion|Orosirian|1900|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Dolerite, gabbro and other mafic igneous rocks; commonly as dykes and sills; may include some metamorphosed mafic intrusions and subordinate ultramafic rocks.|basic intrusive rock|||Y||17-JAN-23
Paleoproterozoic mafic volcanics 76568|76568|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1660|||eruption|Statherian|1690|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly basaltic rocks; may include minor ultramafic volcanics|basic volcanic rock|||N||17-JAN-23
Paleoproterozoic mafic volcanics 76569|76569|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1740|||eruption|Statherian|1800|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly basaltic rocks; may include minor ultramafic volcanics|basic volcanic rock|||N||17-JAN-23
Paleoproterozoic mafic volcanics 76571|76571|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1870|||eruption|Orosirian|2000|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly basaltic rocks; may include minor ultramafic volcanics|basic volcanic rock|||N||17-JAN-23
Paleoproterozoic mafic-ultramafic intrusives 76576|76576|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1820|||intrusion|Orosirian|1855|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset. [which is correct, age name Statherian or numbers = Orosirian?]|Dolerite, gabbro and other mafic igneous rocks; commonly as dykes and sills; may include some metamorphosed mafic intrusions and subordinate ultramafic rocks.|basic intrusive rock|ultramafic intrusive rock||Y||17-JAN-23
Paleoproterozoic sedimentary rocks 76593|76593|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Calymmian|1590|||deposition|Statherian|1690|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Paleoproterozoic sedimentary rocks 76605|76605|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Statherian|1700|||deposition|Statherian|1790|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Paleoproterozoic sedimentary rocks 76608|76608|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1800|||deposition|Orosirian|1840|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Paleoproterozoic sedimentary rocks 76610|76610|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1840|||deposition|Orosirian|1875|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Paleoproterozoic sedimentary rocks 76611|76611|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1850|||deposition|Orosirian|1870|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Paleoproterozoic sedimentary rocks 76613|76613|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Orosirian|1870|||deposition|Orosirian|2000|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Paleoproterozoic to Mesoproterozoic sedimentary rocks 76592|76592|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Calymmian|1570|||deposition|Statherian|1605|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Pandanus Formation|77885|Pandanus Siltstone|77870|||Yes|Formation, beds|Formal|Variation of published name|Defined|Wild Cow Subgroup|37739|||Calymmian||||deposition|Calymmian|1612|11|||50|130|NT|Yes|68146||Sweet, I. (GSQ)||Munson, T. (NTGS)|01-JUN-23|See also Pandanus Siltstone Member. In Geology of Queensland 2013, p52. Of Wild Cow Subgroup, South Nicholson Group. Extends into NT.|Fissile and flaggy, green, purple and red-brown, coarse-grained micaceous siltstone with shaly partings and thin interbeds of very fine-grained sandstone. A prominent blocky sandstone bed is present in about the middle of the member.|medium-coarse grained siliciclastic rock|||N||09-OCT-23
Pandanus Siltstone Member|28201|Pandanus Creek Siltstone Member|14812|||Yes|Member, phase|Formal|Variation of published name|Defined|Constance Sandstone|24864|||Calymmian||||deposition|Calymmian|||||50|130|NT|Yes|44306||Roberts, H.G.|10-JAN-62|||Defn on Tech File E/53-8. and in Sweet & Slater (1975), BMR record 1975/88, p70-71.Within the South Nicholson Group. Different unit from Pandanus Yard Monzogranite (WA). See also Pandanus Siltstone. The Siltstone Member was originally replaced by Pandanus Formation, but the Member (of Constance Sandstone) is current in NT, and recent work suggests it appears to be younger than the Pandanus Formation in Qld.|Fissile/ flaggy, green, purplish-brown and grey coarse siltstone with shaly partings and thin interbeds of very fine to fine-grained sandstone and wacke; middle section often contains a prominent bed of blocky sst.|siliciclastic sedimentary rock|||N||17-JAN-23
Panton Formation|14839|Panton Shale|28906|||Yes|Formation, beds|Formal|Other new published name|Redefined|Negri Subgroup|27520|||Middle Cambrian||||deposition|Middle Cambrian||||||308|WA|No|44317|41840|||||Nothing to do with (Paleoproterozoic) Panton Suite. See also Hudson Formation, Eagle Hawk Sandstone. Within Goose Hole Group. Incorporates the former Panton Shale, Shady Camp Limestone, Negri River Shale, Corby Limestone, Hudson Shale.|Siltstone, mudstone, feldspathic sandstone, micritic and oncolitic limestone|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Paperbark Granite|22623|||||Yes|Formation, beds|Formal|Resvd name published|Described|||Paperbark Supersuite|31788|Orosirian||||magmatic crystallisation|Orosirian|1854|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|43854||Sheppard S.|23-FEB-95|||East Kimberley region.|Medium- to coarse-grained, rapakivi-like granite; medium- to fine-grained biotite-hornblende monzogranite and granodiorite, locally rich in mafic inclusions|acid intrusive rock|||Y||17-JAN-23
Papunya Igneous Complex|41848|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1635|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1639|2|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Warumpi Province. Various informally named units (eg, South Papunya gabbro, West Papunya gabbro, North Papunya gabbro, Papunya ultramafic) form parts of this complex.|Mafic granulite and amphibolite, gabbro and gabbronorite, quartz gabbro; less common plagioclase pyroxenite, pyroxenite, biotite tonalite and biotite leucogranite.|basic intrusive rock|||Y||17-JAN-23
Paradise Creek Formation|14857|||||Yes|Formation, beds|Formal|Other new published name|Redefined|McNamara Group|11575|||Statherian|||inferred, overlying unit|deposition|Statherian|1658|3|isotopic, U/Pb-Pb/Pb ion probe|||1400|QLD|Yes|44290|37459|Hutton L.J., Cavaney R.J., Sweet I.P.||Whitaker, W.|24-JUL-81|Defined 1961, redefined 1981. Age refined by NABRE project. Breccia hosted Fe and Cu Sulphide mineralization. Includes Lady Annie and Mount Kelly group of Cu +/- Au deposits. Within Gun Supersequence.|Stromatolitic dolostone, dolomitic siltstone, some limestone interbeds, dolostone with chert nodules after anhydrite; minor pink to grey fine tuff.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Pargee Sandstone|14869|Pargee sandstone|14871|||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1640||inferred, geological correlation|deposition|Statherian|1768|14|isotopic, U/Pb-Pb/Pb ion probe||1300|1500|NT|No|29809|45140|||||Tentatively correlated with the Moola Bulla Formation (Halls Creek Orogen).  Age: ~1.77 - 1.64 Ga, based on combination of youngest detrital zircons dates, diagenetic xenotime growth, age of Limbunya Group rocks (which overlie Birrindudu Group).|Sandstone, conglomerate, siltstone; sublithic and lithic sandstone, quartz sandstone, conglomerate with jasperlitic and volcanic clasts.|siliciclastic sedimentary rock|||N||17-JAN-23
Parke Siltstone|14883|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Pertnjara Group|15099|||Frasnian||||deposition|Givetian||||||1000|NT|No|44342|69438|||||Includes vertebrate bone beds. Numerical age range (392- 375 Ma) from palaeomag reported in 2003 references.|Brown, purple and green micaceous siltstone, with thin interbeds of lithofeldspathic quartz sandstone. A thin dolomitic limestone occurs locally near the base. In the western MacDonnell Ranges, sandstone dominates the lower half of the succession.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Parsons Range Group|27873|Parsons Range Formation|34097|||Yes|Group, Suite|Formal|Other new published name|Defined|||||Statherian|1670||inferred||Statherian|1710||inferred, underlying unit|||6000|NT|No|44434|43010||||||Quartzose sandstone; minor siltstone and dolostone.|medium-coarse grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Patmungala beds|14948|Patmungala Beds|14947|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Statherian|1799|9|isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1830||inferred, geological correlation|||1100||No|37537||||||Of the Arunta Complex. Intruded by Yarunganyi Granite and by the Southwark Suite.|Sandstone, conglomerate, siltstone: sublithic and lithic arenite, quartz arenite, jasperilitic conglomerate clasts; Felsic volcaniclastic siltstone|siliciclastic sedimentary rock|||N||17-JAN-23
Pattie Creek|38835|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Crispe, A.|06-AUG-03||||||||N||17-JAN-23
Pear Tree Dolostone|33805|Pear Tree Dolomite|26098|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Limbunya Group|10414|||Statherian|||inferred, overlying unit|deposition|Statherian|||||||NT|No|24297||Kruse P. , Beier P., Young D.|02-DEC-99|||Birrindudu - Victoria River Basins. Supersedes Pear Tree Dolomite.|Dolarenite, dolorudite, dololutite, stromatolitic dolostone, dolomitic mudstone, minor carbonaceous mudstone, sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Peculiar Complex|41849|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Statherian|1679|||eruption|Statherian|1680|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|Warumpi Province.|Flow-banded rhyolite, quartz-muscovite schist, minor quartzite and biotite schist; laminated iron- and manganese-rich sediments, arkose, calc-silicate rock; equigranular K-feldspar-rich leucogranite, minor granophyre.|acid volcanic rock|||Y||17-JAN-23
Pedestal beds|27535|Pedestal Beds|15001|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Devonian|||inferred|deposition|Devonian|||inferred|||||No|36335||||||Described in GSWA Memoir 3 (1990) , [overlies?] SW Birrindudu Basin,  p351, 359, 360. Possibly Devonian.|Fine grained sandstone, planar bedded, laminated; conglomeratic sandstone with beds 30 cm - 1 m;laminated, silicified, ferruginous; conglomerate, well rounded cobbles and pebbles, thickly bedded, graded.|siliciclastic sedimentary rock|||N||17-JAN-23
Pedlar Gabbro|15005|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|44944||||||More recently published as informal Pedlar gabbro.|Gabbro|basic intrusive rock|||Y||17-JAN-23
Peko Smelter Porphyry|81900|Smelter porphyry|79076|||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Orosirian|1847|2.5|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1847|2.5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|71592||||||Tennant Creek region. Informal company name? Variation on Smelter porphyry, Smelter Porphyry?|Felsic porphyry.|acid volcanic rock|||N||17-JAN-23
Penyeme Orthogneiss|80195|||||Yes|Formation, beds|Formal|Resvd name published|Mentioned||||||||||||||||||No|71839||Reno, B. (NTGS)|12-SEP-17|||Jinka 6052 map, Huckitta SF53-11. Nearest town Atitjere. Kfs-Pl-Qtz-Bt orthogneiss. To be published in 2018.|Orthogneiss.|metamorphosed acid igneous rock|||Y||22-MAR-23
Peppimenarti Granite|24454|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Wagait Suite|31691|Paleoproterozoic|1840||isotopic, U/Pb-Pb/Pb ion probe|intrusion|Paleoproterozoic|1850||isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|41646|41645|C.Edgoose|28-NOV-86|Kruse, P.D.|12-APR-88|Pine Creek Province.|Biotite leucogranite, granite, porphyritic microgranite.|acid intrusive rock|||Y||17-JAN-23
Perenti Metamorphics|24455|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1771|15|inferred, intrusive relationship|minimum depositional age|Orosirian|1817|7|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|40538|40906|Warren R.G., Freeman M.|08-JUN-84|Brakel, A.|21-JUN-84|Intruded by Dneiper Granite, Mount Swan Granite.|Layered felsic granulite and quartz-sillimanite-biotite-cordierite rock with minor calc-silicate rock and metadolerite.|high grade metamorphic rock|metasedimentary siliciclastic rock||N||17-JAN-23
Permian sedimentary rocks 76691|76691|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cisuralian|273|||deposition|Pennsylvanian|306|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Perta Hill Metamorphics|22644|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|Hayes Metamorphic Complex|27290||||||||||||||||No|9199||L.Offe|04-NOV-75||||Epidote-diopside-plagioclase gneiss.|high grade metamorphic rock|||N||17-JAN-23
Pertaoorrta Group|15091|Pertaoorrta Formation|15090|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Late Cambrian||||deposition|Ediacaran||||||||No|48838|48838|||||Originally Pataoorrta Series of Mawson and Madigan (1930); spelling changed to Pertaoorrta Series by Madigan (1932); defined as a Group by Prichard and Quinlan (1962); redefined as a Formation by Wells et al. (1965). Subsequently re-raised to Group rank, with 2 new Formations, by Ranford et al. (1966) and further Formations within the Group were defined by Wells et al. (1967) and Ranford (1969) [this summary from BMR Bulletin 100, Wells et al. 1970].|Sandstone, siltstone, shale, limestone, dolomite, some conglomerate. Marine fossils.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Pertatataka Formation|15094|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Ediacaran|582||inferred, biostratigraphic correlation|deposition|Cryogenian|635||inferred, biostratigraphic correlation||450|750|NT|Yes|48838|69438|Preiss W.V., Walter M.R., Coats R.P., Wells A.T.||Wells, A.T.|01-OCT-77|+Redefined in 1978. See card. The 730 +/- 45 Ma Rb/Sr  age  (Compston and Taylor, 1969) seems dubious. Age shown as 635 - 582 Ma in 2017 reference.|Mainly (320m) red and green siltstone and shale, with flaser bedding, small-scale cross-laminations and thin interbeds of fine-grained sandstone; overlain by 1.5m of grey medium-grained feldspathic silicified sandstone and 30m of red siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Pertnjara Group|15099|Pertnjara Formation|15098|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Famennian|||biozone|deposition|Givetian|||biozone|||3650||No|44495||||||Where do numerical ages come from? An old time scale? Said to be similar age to Aztec Siltstone fauna, Antarctica [1993 ref].|Sandstone, siltstone, conglomerate, some limestone. Fish remains.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Petermann Nappe Complex|39866|||||Yes|Group, Suite|Formal|Variation of published name|Defined||||||||||||||||||No|24497||||||Name refers to a structural subdomain on the northwestern margin of the Musgrave Block.|||||N||17-JAN-23
Petermann Sandstone|15112|Petermann Sandstone Member|32915|||Yes|Formation, beds|Formal|Variation of published name|Defined|Pertaoorrta Group|15091|||Late Cambrian|||inferred, overlying unit|deposition|Middle Cambrian|511|18||maximum depositional age||250||No|48863|48863||||||A succession of red-brown and white, fine- and medium-grained, thinly-bedded, cross-bedded and rippled, ferruginous and micaceous sandstone; heavy mineral bands and clay pellets are common.|siliciclastic sedimentary rock|||N||17-JAN-23
Peters Creek Volcanics|15114|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tawallah Group|17902|Fiery Supersuite|30637|Statherian|1725|2|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1729|4|isotopic, U/Pb-Pb/Pb ion probe||||QLD|No|44272|44989|||||Age refined by NABRE project. Originally mapped by Roberts et al (1963). Lower part is replaced by Seigal Volcanics.  Age 1726+/-2 Ma, from Geology of Queensland 2013, p56.|Alternating sequence of basalt, rhyolite and rhyodacite; some intermediate volcanics, possibly trachyte and andesite; minor tuff, shale, siltstone, sandstone, dolomite and conglomerate.|igneous volcanic rock|sedimentary rock||N||17-JAN-23
Phelp Sandstone|30513|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Collara Subgroup|35509|||Calymmian|1492|4||deposition|Calymmian|1589|3|||45|75|NT|No|24050|23937|Young D.|23-SEP-96|||Within the Roper Group. Originally mapped by Dunn (1963) as part of Kookaburra Creek Formation (now Nathan Group); also as part of Mantungula Formation|White quartz sandstone, medium to thick bedded, fine- to medium-grained; minor siltstone; chert-clast breccia and conglomerate present in outcrops south of Roper River.|siliciclastic sedimentary rock|||N||07-SEP-23
Phillips Creek Sandstone|15139|Phillips Creek Member|15138|||Yes|Formation, beds|Formal|Variation of published name|Defined|Edith River Group|5978|||Orosirian|1825|4|inferred, overlying unit|deposition|Orosirian|1825|4|inferred, underlying unit|||300|NT|Yes|39679||Stuart-Smith P.G.||Brakel, A.|25-OCT-83|In 2005 age was given as ~1825-1829Ma.|Poorly sorted lithic and tuffaceous sandstone; purple medium to coarse-grained arkose and greywacke, conglomerate, sedimentary breccia; minor siltstone and phyllite.|siliciclastic sedimentary rock|||N||17-JAN-23
Phoenix Orthogneiss|77799|Phoenix Gneiss|75785|||Yes|Formation, beds|Formal|Variation of reserved name|Described|||||Statherian||||magmatic crystallisation|Orosirian|1802|6|isotopic, U/Pb-Pb/Pb ion probe|||||No|69917||Beyer, E. (NTGS)|11-FEB-13|||Pyroxene-hornblende orthogneiss in Aileron Province of the Arunta Region. Named from the nearby Phoenix Bore. To be published: Alcoota 2nd edition 1:250,000 geological map; Beyer EE, Edgoose CJ, Vandenberg LC, Webb GP and Petrick CM, in prep. Alcoota, Northern Territory. 1:250 000 Geological Map Series Explanatory Notes, SF5310. Northern Territory Geological Survey, Alice Springs. Estimated year of publication is 2013.|Tonalitic orthogneiss characterised by a medium-grained assemblage of granoblastic quartz, plagioclase, clinopyroxene and hornblende with abundant accessory pinkish-brown titanite.|metamorphosed acid igneous rock|||Y||17-JAN-23
Pickwick Metabasalt Member|15163|Pickwick Beds|15161|||Yes|Member, phase|Formal|Variation of published name|Defined|Eastern Creek Volcanics|5911|||Statherian|1650|||eruption|Statherian|1700|||||750|QLD|Yes|30529|30534|Derrick G.||Staines, H.R.E.|18-MAR-76|Defined 1976, a redefinition of Pickwick Beds of Robinson (1968) - 99/29866. Within the Haslingden Group.|Grey-green metabasalt, red-brown trachybasalt, orthoquartzite, feldspathic quartzite.|metamorphosed basic igneous rock|metasedimentary siliciclastic rock||N||17-JAN-23
Pincombe Formation|15228|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Carr Boyd Group|3663|||Cryogenian|891|149||deposition|Stenian|891|149||||||No|45047||||||Age: 891 +/- 149 Ma.|Siliceous siltstone and fine-grained sandstone, micaceous shale, quartz sandstone|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Pine Creek Orogen - moderately magnetic rocks 79895|79895|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Pine Creek Orogen - sediments 79937|79937|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Mesoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments.|sedimentary rock|||N||17-JAN-23
Pine Creek Orogen - sediments and volcanics 79921|79921|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments and volcanics.|sedimentary rock|igneous volcanic rock||N||17-JAN-23
Pine Creek Orogen - strongly magnetic rocks 79913|79913|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Pine Creek Orogen - weakly magnetic rocks 79930|79930|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Pine Hill Formation|26103|Pine Hill Conglomerate|15240|||Yes|Formation, beds|Formal|Resvd name published|Defined|Reynolds Range Group|16061|||Statherian|1779||inferred, intrusive relationship|deposition|Statherian|1832|20|inferred, underlying unit|maximum depositional age||600|NT|Yes|39855|48992|Stewart A.J.||Strusz, D.L.|05-NOV-73|Age: ~1820 - 1780Ma. Intruded by Warimbi granite [now Warimbi Schist?], Napperby Gneiss [1997 data]. Maximum depositional age from detrital zircons 1832 +/-20 Ma.|Quartzite, pelitic and psammitic andalusite schist, minor calc-silicate and basalt.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||17-JAN-23
Pingidijarra Hills Granite|70122|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||Crispe, A. (NTGS)|02-MAR-06|||To be used on TANAMI map sheet; nearest town is Lajamanu.|Granite.|acid intrusive rock|||Y||17-JAN-23
Pinkerton Sandstone|15264|Pinkerton Beds""|15263|||Yes|Formation, beds|Formal|Variation of published name|Defined|Auvergne Group|787|||Cryogenian||||deposition|Cryogenian|||||30|375|NT|No|32310|48938|||||Victoria Basin.|Silica cemented quartz sandstone/orthoquartzite, minor siltstone and mudstone.|medium-coarse grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Pinnacle Gneiss|81855|||||Yes|Formation, beds|Informal|Resvd name published|Mentioned|||||Cambrian|||inferred, lithostratigraphic correlation||Neoproterozoic|||inferred, lithostratigraphic correlation|||||No|72516||||||Reserved as Pinnacle Member.|||||N||17-JAN-23
Pinpirnga Granite|42376|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Paleoproterozoic|1770||inferred, structural relationship|metamorphism|Paleoproterozoic||||||||No|72360||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15). Published in 2004 Surface Geology sheet. Misspelt as Pingirnga Granite in 2004 interp. geology sheet.|Equigranular, medium grained biotite granite|acid intrusive rock|||Y||17-JAN-23
Pinyinna beds|15279|Pinyinna Beds|25401|||Yes|Formation, beds|Informal|Other new published name|Defined|||||Tonian|820||inferred, intrusive relationship|deposition|Tonian|1058|31|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||250||No|36701||||||Appears to be intruded by the Amata dolerite.  Age: probably 820Ma. Correlated with Bitter Springs Formation - which is Cryogenian age.|Grey quartz-muscovite phyllite, crystalline dolostone, fine-grained sandstone, red, green and pale grey fissile siltstone, dolomitic siltstone. Dominated by phyllite, interlayered with dolostone and minor schists in the north and Petermann Ranges.|metasedimentary siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Pioneer Sandstone|15284|Pioneer Formation|15282|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Ediacaran|||inferred, geological correlation|deposition|Cryogenian|709|15||maximum depositional age||170|NT|Yes|46865|46865|Preiss W.V., Walter M.R., Coats R.P., Wells A.T.|01-OCT-76|Wells, A.T.|01-OCT-77|Overlies Areyonga Formation and Bitter Springs Formation. Correlated with Olympic Formation. NOT related to Pioneer beds and Pioneer Sandstone (TAS). Together with the lateral equivalent, the Olympic Formation, these units are believed to correlate with Marinoan glacial strata of the Adelaide geosyncline.|Pebbly arkose, feldspathic sandstone; dolomite in places; minor conglomerate at base in places.|siliciclastic sedimentary rock|||N||17-JAN-23
Pipeline Granite|81901|Pipeline granodiorite|42143|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Statherian|1802|4|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1802|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|71592||||||Tanami Orogen.|Biotite-hornblende tonalite.|acid intrusive rock|||Y||20-AUG-23
Pitjantjatjara Supersuite|39078|Kulgera Supersuite|33040|||Yes|Supergroup|Formal|Resvd name published|Defined|||||Stenian|1121|11|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Ectasian|1219|9|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|60678|61154|Edgoose, C.|17-SEP-03|Kruse, P.D.|24-OCT-03|For use on MUSGRAVE map sheet.  Age: 1190-1120Ma (Edgoose et al; Major and Conor 1993; Scrimgeour et al 1999; Edgoose et al 2002; Young et al 2002; Close et al 2003a). Two distinct age groups, defining Early and Late Musgravian Orogeny. c.1219-1200 Ma, and c.1190-1155 Ma (Sen, 2009). Musgrave Province, associated with the Musgrave Orogeny. Three facies are mapped separately.|Granite, monzogranite, monzonite, granodiorite. Includes metagranodiorite, metamonzogranite, gneissic porphyritic leucogranite, medium-grained mafic granulite, granitic gneiss, metasyenogranite.|acid intrusive rock|metamorphosed igneous rock||Y|A-type|17-JAN-23
Pitjantjatjara Supersuite (geophysically interpreted)|76196|||||Yes|Supergroup|Informal|Variation of published name|Unpublished|||||Mesoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Musgrave and Warumpi Provinces. Magnetic granite, monzogranite, monzonite and granodiorite. Informal unit to be used for Georgina-Arunta energy assessment 1:1 million solid geology interpretation|Magnetic granite, monzogranite, monzonite and granodiorite|acid intrusive rock|||Y||17-JAN-23
Plain Creek Formation|15306|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|McNamara Group|11575|||Statherian|1635|13|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1647|8|inferred, geological correlation|||1000|NT|Yes|38237|49018|I.P.Sweet|08-JAN-82|Kruse, P.D.|12-MAR-82|Redefined by I. Sweet (after Sweet 1982, 1984). Approved by P. Kruse, 11-APR-2005. Age given as Carpentarian. Age refined by NABRE project. Age: >1590Ma, but redefinition (2005) disagrees with this age.|Micaceous siltstone and shale, fine- to coarse-grained lithic and sublithic sandstone; minor pebble conglomerate, graded sandstone beds, and pebble- to boulder-bearing mudstone-turbidite and mass flow sediments.|siliciclastic sedimentary rock|||N||17-JAN-23
Playford Sandstone|37727|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wild Cow Subgroup|37739|||Calymmian|1800|||deposition|Calymmian|1820||||||NT|Yes|24442|65337|Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area. Within the South Nicholson Group. Lies with angular unconformity and disconformity on Widdallion Sandstone Member. Age: >1450Ma. Now (2023) excludes outcrops north of the Mitchiebo-Maloney fault which have been shown to be older and form the Fish Hole Formation.|Very fine to medium and occasionally coarse grained sublithic to lithic sandstone; ferruginous sandstone; quartzose sandstone, shale, siltstone and minor conglomerate, ironstone and carbonates.|siliciclastic sedimentary rock|||N||06-OCT-23
Plenty Group|37959|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Cryogenian|||inferred, overlying unit|deposition|Tonian|840||inferred, biostratigraphic correlation|deposition||350|NT|Yes|61404||Kruse, P.D.|30-JAN-03|Kruse, P.D.|30-JAN-03||Mainly fluviatile siliciclastic rocks; also stromatolitic carbonate and a hypersaline succession. Poorly sorted labile sediments indicate minimal transport.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Plover Formation|15330|||||Yes|Formation, beds|Formal|Resvd name published|Fully described|Troughton Group|18608|||Bathonian|||biozone|deposition|Hettangian|||biozone||104|672||No|41459||A.J.Mory|02-DEC-86|||Age: ~203-~154Ma. Hosts the Daly River Road surficial Fe deposit and the McLeans surficial type Mn deposit. Potential hydrocarbon reservoir.|Dark brown limonitic coarse to pebbly quartz sandstone, massive white friable quartz sandstone, conglomerate, siltstone and claystone interbeds, rare limestone and coal|siliciclastic sedimentary rock|||N||17-JAN-23
Plum Tree Creek Volcanics|15334|Plum Tree Creek Volcanic Member|26846|||Yes|Formation, beds|Formal|Variation of published name|Defined|Edith River Group|5978|David Suite|72698|Orosirian|1822|5|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1825|4|isotopic, U/Pb-Pb/Pb ion probe|||1300|NT|Yes|46678||Stuart-Smith P.G.|25-SEP-83|Brakel, A.|25-OCT-83|Age: 1857-1822 Ma.  Intruded by Grace Creek Granite|Rhyolite, ignimbrite, dacite;  minor basalt, basaltic andesite, crystal tuff, lenses of tuffaceous and cherty sediments, quartz (+/- feldspathic) sandstone.|acid volcanic rock|||N||17-JAN-23
Point Spring Sandstone|26849|Point Spring Sandstone""|15382|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Weaber Group|19643|||Bashkirian||||deposition|Serpukhovian||||||240|NT|No|48635|41839|||||See also Lexicon. Unit probably diachronous. Previously mapped as Border Creek Formation. And formerly part of the Weaber Group - revised by author Gorter et al (2005) as the onshore equivalent of Arco and Aquitaine Fms.  Age: ~322-~314Ma. NTGS still included this unit in Weaber Group in 2006, but not by 2013 (although shown in Weaber Group in 2015 Auverne map). See also Border Creek Formation [regarded as part of Point Spring Sst by Mory and Beere(1988) but actually overlies it].|Quartz sandstone, minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Point Wakefield beds|15384|Point Wakefield Beds|27540|||Yes|Formation, beds|Informal|Unknown or process pending|Defined|||||Middle Cambrian||||deposition|Middle Cambrian||||||54||No|36335|60684|||||Formerly included in Chewings' (1931) Winnecke Creek Tablelands formation and in Merrina Beds (Milligan et al 1966). Possibly overlain in part by Hanson River beds also. See Point Wakefield Beds for Unit Definition.|Brown and white claystone; red to white, fine, angular well sorted marine sandstone, laminated red-brown and white micaceous siltstone and claystone; minor local conglomerate; bioturbated, fossiliferous|siliciclastic sedimentary rock|||N||17-JAN-23
Police Creek Siltstone Member|15400|Police Creek Siltstone|15402|||Yes|Member, phase|Formal|Resvd name published|Defined|Lochness Formation|10558|||Statherian|1650|||deposition|Statherian|1650|||||400|QLD|Yes|30534|30534|? Derrick, G.M. Wilson I.H., Hill R.M.|21-APR-75|Staines, H.R.E.|18-MAR-76||Massive earthy siltstone and phyllite, with blotchy pale purple to grey coloration; minor fine-grained sandstone and green-grey rhyolitic tuff.|siliciclastic sedimentary rock|||N||17-JAN-23
Pollard Formation|23916|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Sahul Group|16515|||Carnian|230|||deposition|Anisian|||||||WA|No|41532|42442|A.J.Mory|13-AUG-87|||Defined in Mory (1988) NW Shelf volume for WA, Mory (1991) - GSWA Rep 29 for  NT and WA.  Age: >240->230Ma.|Sandstone with interbedded shale; minor limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Pollock Hills Formation|15411|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Mount Webb Suite|31336|Statherian|1643|13|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1677|6|isotopic, U/Pb-Pb/Pb ion probe||1000|||No|29806|45140|||||Dacitic volcanics which originally included the new Kiwirrkurra Formation (per email, I.Tyler, 11/10/07).  See also the misspelt Polloch Hills Formation with age: 1615Ma. Warumpi Province, Arunta Orogen, North Australian Craton.|Metadacite, metarhyodacite, and volcaniclastic metasedimentary rock.|acid volcanic rock|metasedimentary siliciclastic rock||N||17-JAN-23
Polly Conglomerate|27881|||||Yes|Formation, beds|Formal|Other new published name|Defined|Finke Group|6661|||Carboniferous||||deposition|Upper Devonian|380||||||NT|No|48865|48865|||||Type area at Horseshoe Bend, where clasts include material from Winnall beds.|Polymictic, clast- to matrix-supported conglomerate, with interbeds of medium- to coarse-grained sandstone and rare brown or green siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Poodyea Formation|15428|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Miocene|17||inferred, overlying unit|deposition|Miocene|21||inferred, structural relationship|||10|NT|Yes|38832|38832|B.M.Radke|05-MAR-82||24-MAY-83|Previously reserved as Poodyea. Several refs include this unit in the Georgina Basin, but it is a much younger unit that happens to overlie Georgina Basin rocks.|Cobble and boulder conglomerate, cross-stratified sandy conglomerate, pebbly sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Poolowanna Formation|15442|Poolowanna beds|15443|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Aalenian||||deposition|Sinemurian||||||206|SA|No|37776|41063|||||Previously known as 'Cuttapirie beds', 'basal Hutton', and 'basal Jurassic'. Source of significant production of gas in the Eromanga Basin.|White to pale grey, fine- to medium-grained, crossbedded sandstone, ripple cross laminated; dark grey siltstone; shale; coal seams and breccias.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||22-JUN-23
Possum Creek Charnockite|26321|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Napperby Suite|30862|Statherian|1774|6|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1774|6|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|11884|48992|A.J.Stewart|18-JUN-74|Wells, A.T.|12-NOV-76|Intrudes Tyson Creek granulite.|Medium-grained foliated hypersthene-quartz-andesine-sanidine granite|acid intrusive rock|||Y||17-JAN-23
Pottoyu Granite Suite|33649|Pottoyu Granite Complex|15509|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||Pitjantjatjara Supersuite|39078|Stenian|1144|12|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Stenian|1192|13|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60683|60683|Edgoose C., Close D., Scrimgeour I.||Beier, Kruse, Young|27-JUL-99|PETERMANN RANGES 1:250 000 sheet area. Includes Mulyati Granite, otherwise undivided. Ages: 1192+/- and 1144+/-12Ma (SHRIMP U-Pb zircon) - suggest a series of intrusions over a prolonged period of time. Parts previously mapped as Olia Gneiss. Name may have been replaced by the shorter Pottoyu Suite.|Variously metamorphosed, foliated to migmatitic granites; includes biotite granite, hornblende granite, leucogranite, rapakivi textured granite.|metamorphosed acid igneous rock|||Y||17-JAN-23
Pottoyu Suite|42438|Pottoyu Granite Suite|33649|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1144|12|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Mesoproterozoic|1192|13|isotopic, U/Pb-Pb/Pb ion probe|||||No|60683||||||Has name been shortened deliberately? Does it replace Pottoyu Granite Suite?|Coarsely porphyritic foliated biotite granite, typically with rapakivi texture, locally migmatititc with coarse hornblende; less abundant equigranular leucogranite.|acid igneous rock|||Y||17-JAN-23
Powell Formation|38409|Tomkinson Creek beds|18320|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Renner Group|38406|||Calymmian||||deposition|Calymmian|||||300|850|NT|No|24304||||||Reserved as Powell Creek. (Hussey, 1996), which has been published as upper, middle and lower Powell Creek Formation. Previously mapped as undifferentiated Tomkinson Creek beds.|Sandstone; quartz arenite; lensing, medium to very thick bedded, medium-grained to granular; quartz-rich; micaceous mudstone, rip-up clasts and breccia; laminated, crossbedded, ripples, graded, dessicated, halite pseudomorphs; silicified, jointed.|siliciclastic sedimentary rock|||N||07-SEP-23
Prentice Gneiss|83005|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Orosirian|||inferred||Orosirian|1870.6|3.8|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|||Schofield, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Named after Prentice Lake, approx. 20 km to the west. type section in drill-hole NDIBK03, down-hold depth from 281.07 m to 285.60 m. Drilled at 599262mE and 7837276mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. SHRIMP U-Pb analysis returned an igneous crystallisation age of 1870.6 +/- 3.8 Ma .Felsic chemistry and mostly unimodal zircon population, with euhedral grains and well-defined oscillatory zoning, suggesting that the unit's protolith was magmatic, unlike surrounding Alroy Formation.|Medium-grained granoblastic and weakly schistose feldspathic gneiss.|foliated metamorphic rock|||U||01-FEB-23
Prices Creek Group|15573|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Middle Ordovician|||||Lower Ordovician|||||||WA|No|44404|44998|||||See also Lexicon.|Siltstone, shale, limestone, and dolomitic sandstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||18-SEP-23
Prices Springs Granite|15576|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Margaret Suite|31736|Orosirian|1780||isotopic, U/Pb|intrusion|Orosirian|1804|50|isotopic, U/Pb-Pb/Pb, TIMS|||||No|46676||||||Pine Creek Province. Of the Cullen Supersuite. Intrudes South Alligator Group, Burrell Creek Formation.|Coarse grained biotite-hornblende granite, fine grained biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Prickle Hill"" sandstone|74921|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|64662||||||Of northern Arunta region. Similar detrital zircon age distributions to Killi Killi Formation, Tanami region. May both have been part of a much larger depositional system.|Sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Prion Formation|15604|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Woodbine Group|20481|||Eocene|38|||deposition|Eocene|41|||||||No|42053||||||Age: ~41-~33Ma.|Limestone.|carbonate sedimentary rock|||N||17-JAN-23
Prize Supersequence|40571|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Statherian|1785||||Statherian|1790|||||1500||No|66844||||||Calvert Superbasin. Equivalent to parts of lower McNamara Group.|Several cycles of upward-fining mainly siliciclastic sedimentation, followed by increasing amounts of thinly laminated carbonaceous shale or rhythmite.|siliciclastic sedimentary rock|||N||17-JAN-23
Ptilotus Granodiorite|73224|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||The Granites Suite|42093|Paleoproterozoic||||intrusion|Paleoproterozoic|1805|5|isotopic, U/Pb|||||No|62580|||||||Foliated coarse-grained, weakly porphyritic biotite granodiorite; strongly zoned foliation.|acid intrusive rock|||Y||17-JAN-23
Puffin Formation|15646|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Bathurst Island Group|1249|||Danian|66||biozone|deposition|Campanian|74||biozone|||570|WA|No|41532|41532|||||Age: Late Cretaceous to early Paleocene. Restricted to eastern Ashmore Platform and Vulcan Sub-basin. See also Puffin Sandstone.|Lenticular sandstones interbedded with shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Puka Granite|33654|Puka|30599|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||Umutju Granite Suite|33650|Mesoproterozoic|1145|6|isotopic, Pb/Pb|intrusion|Mesoproterozoic|1172|6|isotopic, Pb/Pb||||NT|Yes|60572|60683|Scrimgeour I., Close D.,Edgoose C.|13-NOV-96|||Petermann Ranges 1:250 000 sheet area. Within the Pitjantjatjara Supersuite. Age: 1172+/-6Ma (Kober Pb-Pb zircon).|Porphyritic hornblende and clinopyroxene granites, variably deformed and recrystallised to garnet-bearing assemblages; rare migmatite.|acid intrusive rock|||Y||17-JAN-23
Pul Pul Rhyolite|15650|Pul Pul Rhyolite Member|15649|||Yes|Formation, beds|Formal|Variation of published name|Defined|El Sherana Group|24261|||Orosirian|1828.6|5.1|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1828.6|5.1|isotopic, U/Pb-Pb/Pb ion probe|||1300|NT|Yes|46163||Stuart-Smith P.G.||Brakel, A.|13-JUL-83|Formerly of the Edith River Group (as Pul Pul Rhyolite Member).|Purple to pink, felsic welded vitric ignimbrite and non-welded ignimbrite; non-vesicular rhyolite intrusives; polymictic volcaniclastic granule to boulder conglomerate, massive volcaniclastic sandstone.|acid volcanic rock|||N||17-JAN-23
Pulya Pulya Metamorphics|75903|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|||||N||17-JAN-23
Puna Kura Kura Formation|79226|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Winnall Group|79223|||Cambrian|||inferred, geological correlation|deposition|Ediacaran|||inferred, geological correlation|||330|NT|Yes|71898||Normington, V. (NTGS)|01-SEP-15|Edgoose, C., Normington, V.|08-MAR-17|Map Sheet=HENBURY SG53-1, 5348. Nearest Town=Mount Ebenezer, on Kulgera SG53-5, 5447. To be published: 2nd Edition Henbury 250K geology map and associated explanatory notes, release 2018, and also Donnellan N and Normington VJ, 2017. Towards a stratigraphy for the Neoproterozoic and probable early Cambrian in the central Amadeus Basin, Northern Territory: in Annual Geoscience Exploration Seminar (AGES) Proceedings, Alice Springs, Northern Territory 28¿29 March 2017. Northern Territory Geological Survey, Darwin.|Medium-grained, well-sorted, well-rounded subarkose or quartz arenite with weathered shale clasts that is thin to thickly bedded and has occasional pebble and conglomeratic beds and is commonly cross-bedded.|siliciclastic sedimentary rock|||N||17-JAN-23
Pungalina Member|15661|Pungalina Beds|15659|||Yes|Member, phase|Formal|Variation of published name|Redefined|Echo Sandstone|33173|||Statherian|1720|||deposition|Statherian|1725|||||120|NT|Yes|44436|22538|||||Redefinition of unit, after Roberts et al. (1963) and Jackson et al. (1987). Formerly of the Echo Sandstone (Robinson Range 250K map legend), Masterton Formation, Gold Creek Volcanics. Intruded by the Hobblechain Rhyolite.|Cobble-boulder conglomerate, pebbly sandstone; minor siltstone, ferruginous-lithic mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Puntitjata Rhyolite|33811|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tjauwata Group|36772|||Stenian|1075|2|isotopic, Pb/Pb|eruption|Stenian|1075|2|isotopic, Pb/Pb||||NT|Yes|50321|65256|Edgoose C., Close D.|23-NOV-99|Kruse, P.D.|21-JAN-02|Bloods Range 1:250 000 map sheet area.  Age: 1075+/-2Ma (Pb-Pb zircon)|Finely porphyritic rhyolite, tuff, minor volcaniclastics.|acid volcanic rock|||N|A-type|17-JAN-23
Purni Formation|15684|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Artinskian||||deposition|Asselian|||||3|350|SA|Yes|30514|33976|Youngs, B.C.|03-DEC-74||09-DEC-74|Contains coal seams that are over 30m thick, extending over 70km along strike.|Beds of white kaolinitic sandstone; occasional thin conglomerates; thinly bedded grey shales, frequently carbonaceous; siltstones; thin coals and very carbonaceous shales.|siliciclastic sedimentary rock|||N||17-JAN-23
Putardi Quartzite|41850|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1590||inferred, structural relationship|tectonic process|Statherian|1663||inferred, underlying unit|maximum depositional age|||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|01-OCT-04|Kruse, P.D.|01-OCT-04|In the Haasts Bluff Domain.  Warumpi Province.|Quartzite, quartz-muscovite schist, rare kyanite-staurolite-quartz schist; Biotite-muscovite phyllite and schist, muscovite-kyanite-quartz schist, interleaved with quartzite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Quandong Conglomerate|15725|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Neoproterozoic|||inferred, overlying unit|deposition|Neoproterozoic|629|18||maximum depositional age|20|160|NT|No|48863|48863||||||A succession of conglomerate, conglomeratic sandstone and sandstone. Conglomerate clasts are generally 2cm but range up to 30cm, and consist mainly of chert, sandstone and quartzite.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Quart Pot Granite|83014|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Orosirian|||inferred||Orosirian|1839.9|3.8|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|Yes|||Schofield, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Named after Quart Pot Dam, approx. 15 km to the northeast. Type locality: Drill-hole NDIBK09, down-hold depth from 166.91 m to 168.28 m. Drilled at 608328 mE and 7843609 mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs. Intersected numerous times in drill-core NDIBK09. More porphyritic and younger than the Chick Granodiorite, which makes up the only other known basement stratigraphy in the vicinity.|Medium- to coarse-grained feldspar-porphyritic biotite-hornblende granite, comprising plagioclase, K-feldspar, quartz, biotite, hornblende and muscovite, with traces of zircon, apatite, tourmaline and titanite.|acid intrusive rock|||Y||02-FEB-23
Queenie Flat Granite Complex|79099|Queenie Flat Granite|27544|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Statherian||||magmatic crystallisation|Orosirian|1795|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|69917||||||Central Arunta Region, Aileron Province. U/Pb SHRIMP zircon dating, Hf analytical data. Foliated biotite granite sampled. Igneous crystallisation age of 1795+/-5 Ma. Metamorphic zircon ages also recorded.|A diversity of I-type granites and granitic gneisses.|acid intrusive rock|metamorphosed acid igneous rock||Y|I-type|17-JAN-23
Quilalar Formation|15764|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1748|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1755|3|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|500|2000|QLD|Yes|36226|46960|Derrick G.M., Wilson I.H., Sweet I.P|28-APR-77|Whitaker, W.|11-DEC-80|For detailed lithology see UNIT DEFINITION. Not in the Haslingden Group (Jackson et al, AJES, 2000). Previously included as part of 'Surprise Creek Beds'.  Maximum depositional age 1748+/- 4 Ma (Geology of Queensland 2013, p57).|Feldspathic quartzite, orthoquartzite, conglomerate, arkosic grit, shale, siltstone, minor limestone and dolomite.|siliciclastic sedimentary rock|||N||17-JAN-23
Quita Formation|15774|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Narpa Group|37962|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||70|NT|No|44273|44211|||||Possibly disconformably overlain by Steamboat Sandstone? Formerly included in Steamboat Sandstone (Reynolds, 1965).|Sequence of thin-bedded to laminated siliceous shale, marly and quartzic, bituminous limestone with nodular chert. Contains trilobites, hyoliths, molluscs.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Quorn dyke tonalite|68884|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Paleoproterozoic|1870|3||intrusion|Paleoproterozoic|1870|3||||||No|61056||||||Briefly described.|Samples examined: foliated metatonalite (folded and boudinaged, heavily jointed and variably fractured); and foliated andalusite tonalite (boudinaged, heavily jointed and varaibly weathered)||||Y||17-JAN-23
Racecourse Formation|84112|Crow Formation|37729|||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Calymmian|||||Calymmian|1569|22|||||NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|Rocks previously mapped as Crow Formation NW of Michiebo Fault.|Interbedded lithic micaceous siltstone, fine-grained sandstone, red/brown-grey shale, chalky white claystone, fine-medium-grained quartzose to sublithic sandstone. Minor local red/brown, feldspathic, micaceous, ferruginous, lithic sst, pebbly sst, congl.||||N||09-OCT-23
Radiolarite Member|77472|||||Yes|Member, phase|Informal|Other new published name|Briefly described|Bathurst Island Group|1249|||Valanginian||||deposition|Valanginian||||||||No|13224||||||Related to Darwin Radiolarite in Bathurst Island Group?|Radiolarite.|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Ragged Range Conglomerate|28948|Ragged Range Conglomerate Member|15799|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Cockatoo Group|4273|||Frasnian||||deposition|Frasnian||||||300|WA|No|45038|41864|||||See also Lexicon.|Pebble to boulder polymict conglomerate, pebbly sandstone, fine to very coarse grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Raiwalla Shale|27545|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wessel Group|27928|||Ediacaran|||inferred, biostratigraphic correlation|deposition|Ediacaran|||inferred, biostratigraphic correlation|||1000|NT|No|44338|43010||||||Grey and green mudstone, red when weathered, micaceous, interbedded with fine to medium grained flaggy sandstone; sandstone rubble dominates in most weathered outcrops|siliciclastic sedimentary rock|||N||17-JAN-23
Randall Peak Metamorphics|38003|Randall Peak metamorphics|15826|||Yes|Formation, beds|Formal|Variation of published name|Described|||Jennings Suite|30859|Statherian|||||Statherian|1684|36|isotopic, U/Pb-Pb/Pb ion probe|||||No|9199||||||Definition card for Randall Peak metamorphics however still applies for formal (capitalized) name. Intruded by Jennings Granitic Gneiss. Age 1684 +/- 36 Ma, 1 analysis, Zhao and Bennett 1995, unknown if crystallisation or metamorphism age.|Quartzofeldspathic gneiss, muscovite-biotite schist, amphibolite, biotite gneiss; rare sillimanite-mica schist, porphyroblastic feldspar gneiss|high grade metamorphic rock|||N||17-JAN-23
Ranford Formation|15830|||||Yes|Formation, beds|Formal|Other new published name|Defined|Duerdin Group|5760|||Ediacaran||||deposition|Cryogenian|672|70|isotopic, Rb/Sr||200|500|WA|No|44317|45140|||||RUBY PLAINS 1:100 000 sheet. Formerly of Ord Group. Contains zebra rock (kaolinitic siltstone), a striking red and white banded rock - now submerged in the Ord River reservoir. Wolfe Basin.|Thinly bedded micaceous siltstone, ferruginous siltstone, claystone, quartz and lithic sandstone, dolomitic quartz sandstone, dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Ranken Limestone|27886|||||Yes|Formation, beds|Formal|Unknown or process pending|Redefined|Barkly Group|32954|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone||||NT|Yes|44285|64443|||||See also Lexicon. Defined 1966. Defn on Tech File E/53-8. Revised Definition (07-JUN-2005 - Kruse, P.D., after Öpik, 1956a, 1956b). Western and central Georgina Basin. Replaced original Barkly Group (which is now redefined as parent of Ranken Limestone).|Bioclast, bioclast-ooid and bioclast-intraclast rudstone, bioclast wacke/floatstone; minor calcimudstone. Red-brown silicification, abundant fossils characteristic.|carbonate sedimentary rock|siliciclastic sedimentary rock|continental rift|N||17-JAN-23
Rapakivi granite|35679|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Southwark Granitic Suite|30241|||||intrusion|||||||||No|44158||||||Probably not intended as a formal name.  Age: ~1670-1570Ma. Probably obsolete.||acid intrusive rock|||Y||17-JAN-23
Rapide Granite|72411|||||Yes|Formation, beds|Formal|Other new published name|Described|||Carrington Suite|41811|Statherian|1590||isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Statherian|1760||isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|62633||||||Note: WA showed this granite as part of the Carrington Suite in 2006, 2016, but NTGS shows it as time equivalent, but not included in the Suite. Age: younger than 1805 Ma Stafford Event.|Garnet-bearing biotite granite, mostly porphyritic with tabular feldspars sometimes defining a weak foliation|acid intrusive rock|||Y||25-JUL-23
Red Cliff Granite|74104|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Tennant Creek Suite|30737|Paleoproterozoic||||intrusion|Paleoproterozoic|1850|||||||No|24197||||||Age: ~1850Ma. Geological province: Tennant Creek Davenport Province.|Granite.|acid intrusive rock|||Y||17-JAN-23
Red Eye Granite|78826|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||intrusion|||||||||No|64675||||||Informal company name?|Granite.|acid intrusive rock|||Y||17-JAN-23
Red Heart Dolostone|42197|Red Heart Dolomite|15935|||Yes|Formation, beds|Formal|Variation of published name|Defined|Shadow Group|37961|||Cambrian Series 2|||inferred, biostratigraphic correlation|deposition|Cambrian Series 2|||inferred, biostratigraphic correlation||5|126|NT|No|12951||||||Dolostone is now the preferred terminology. Defined as Red Heart Dolomite but Red Heart Dolostone incorporates both Red Heart Dolomite and Errarra Formation.|Stylolitic, mottled, brecciated and vuggy dolostone above basal arkose or sandstone, with thin mudstone interbeds. Local basal sandstone and quartzose siltstone below dolomitic sandstone and quartzose dolostone; also conglomerate and marly mudstone.|carbonate sedimentary rock|siliciclastic sedimentary rock|continental rift|N||12-JUL-23
Redbank Deformed Zone|72681|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Paleozoic||||deformation|Paleozoic||||||||No|||||||Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory. Also to be used in Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Blastomylonite and other highly strained rocks of various compositions, locally overprinted by migmatite; zone includes undeformed relics|fault or shear rock|||Y||17-JAN-23
Redbank package|81661|||||Yes|Supergroup|Informal|Sequence strat published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|72373||||||Includes Edith River Group, Katherine River Group, Groote Eylandt Group, Donydji Group, most of Tawallah Group, lower part Spencer Creek Group.|||||N||17-JAN-23
Redcliff Pound Group|15983|||||Yes|Group, Suite|Formal|Resvd name published|Redefined|||||Cambrian|510||inferred, overlying unit|deposition|Ediacaran||||deposition|1300|1500|WA|Yes|29809|45140|Blake D.H.|01-JAN-75|WA SNSC|01-JAN-78|Age very poorly constrained. Top may be as young as Cambrian. See also misspellings: Redcliffe Pound Group, Red Cliff Pound Group. Redefined in 2017. For recent update see: Haines, P.W., Allen, H.J. 2016. The Murraba Basin: another piece of the Centralian Superbasin jigsaw puzzle falls into place IN GSWA 2016 extended abstracts: promoting the prospectivity of Western Australia: Geological Survey of Western Australia, Record 2016/2, p. 31-35.|Abundantly cross bedded and rippled medium grained quartz sandstone, minor sublithic sandstone, shale, siltstone, conglomerate, arkose, breccia; some convolute lamination and disturbed cross beds.|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Redhackle Granite|70535|Redhackle|39117|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1772|3||intrusion|Statherian|1772|3|||||NT|Yes|62378||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||Reserved as Redhackle. Formerly Giles Range granite. New zircon growth at 1579 +/- 7 Ma (Chewings Orogeny age) recognised. Intrudes Lander Rock Formation.|Biotite granite, gneiss, megacrystic k-feldspar-bearing with rare mantled (rapakivi) feldspar; tourmaline-bearing; locally intensively crenulated; equigranular/seriate porphyritic and orbicular textural variants|acid intrusive rock|||Y||17-JAN-23
Renner Group|38406|Tomkinson Creek beds|18320|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Ectasian|1429|31|inferred, geological correlation|deposition|Calymmian||||||3500||No|23410|24303|||||Reserved as Renner Springs (Hussey, 1996).  This unit was previously mapped as part of the Tomkinson Creek beds on the Beetaloo and Helen Springs 1st edition 250K maps, and the Ashburton Sandstone (of Noakes and Traves 1954).|Quartz arenite, sublithic arenite, siltstone; minor mudstone and conglomerate; rare stromatolitic dolostone. Locally abundant halite pseudomorphs|siliciclastic sedimentary rock|||N||07-SEP-23
Repulse Aplite|42230|||||Yes|Formation, beds|Formal|Variation of published name|Described|||||||||intrusion|||||||4||No|23809||||||Possibly named for a prospect and not intended as a formal name?  Age: stated to be <2528+/-5Ma but as this aplite intrudes Proterozoic stratigraphy it is concluded it cannot be Archaean.  See also the misspelt Repusle Aplite.|Cream-coloured aphanitic to porphyritic dyke which cuts the Tanami Group in the Tanami Gold Mine.|acid intrusive rock|||Y||17-JAN-23
Reward Dolostone|76088|Reward Dolomite|16057|||Yes|Formation, beds|Formal|Variation of published name|Described|Umbolooga Subgroup|18813|||Statherian|||||Statherian||||||25|NT|No|64815||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). Hosts Pb-Zn deposits. See Reward Dolomite in Jackson et al. , 1987 p102 for type section location.|Dololutite, stromatolitic dololutite, silty dololutite and dolarenite with lesser sandy dolarenite, dolorudite and sandstone; laminated, thinly to massive bedded, cross-bedded, brecciated and slumped; oncoids, ooids and silica spheroids.|carbonate sedimentary rock|||N||17-JAN-23
Reynolds Range Group|16061|||||Yes|Group, Suite|Formal|Resvd name published|Redefined|||||Statherian|1780|10|inferred, intrusive relationship|deposition|Statherian|1798|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000|NT|Yes|33102|48992|Wells A.T., Stewart A.J.|05-OCT-73|Strusz, D.L.|05-NOV-73|Defined 1980. Intruded by Warimbi granite, and by Coniston Schist.|Quartzite, orthoquartzite, shale, slate, schist, siltstone, sandstone, dolomite, limestone, cordierite granofels, calcsilicate rock, felsic granulite, gneiss.|metasedimentary siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Reynolds River Granite|25441|||||Yes|Formation, beds|Formal|Other new published name|Described|||Wagait Suite|31691|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|46676||||||Pine Creek Province. Intrudes Burrell Creek Formation.|Pink medium porphyritic granite, grey medium hornblende-biotite granite,  quartz monzonite.|acid intrusive rock|intermediate intrusive rock||Y||17-JAN-23
Riddock Amphibolite|16087|Riddock Series|16088|||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Cambrian|||||Cryogenian|734|44|isotopic, U/Pb-Pb/Pb ion probe|||2000||No|44964||||||Replaced by Riddock Amphibolite Member for some years, but reinstated at Formation rank ~2001. To be used on Illogwa Creek and Hale River 1:250k mapsheets by NTGS (advice 31-MAR-2011). See also misspelling Riddoch Amphibolite.|Layered and some massive amphibolite; minor garnetiferous quartzofeldspathic gneiss, garnet-biotite gneiss; rare sillimanite gneiss, hornblende or clinopyroxene-bearing plagioclase-rich gneiss|metasedimentary rock|metamorphosed basic igneous rock||N||17-JAN-23
Ringwood Member|16104|||||Yes|Member, phase|Formal|Other new published name|Defined|Aralka Formation|524|||Cryogenian||||deposition|Cryogenian|658|5|isotopic, Re/Os|deposition||1000|NT|Yes|48890|48890|||NT SNSC|10-NOV-15|Now of Aralka Formation. Formerly of the Pertatataka Formation. Not to be confused with Ringwood nomenclature for microgranite in QLD. Redefined by VJ Normington, N Donnellan 29-OCT-2015. Defn approved 10-NOV-2015.  The depositional age(658 Ma) is inferred from Re-Os dating of  Aralka Formation in Wallara 1.|Dolomite and limestone, stromatolitic and pisolitic in part; calcarenite; minor siltstone; rare breccia.|carbonate sedimentary rock|||N||02-JUN-23
Rinkabeena Shale|16107|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Cryogenian||||deposition|Cryogenian||||||448|NT|Yes|46865|45155|||Wells, A.T.|01-OCT-77|Age late Adelaidean.|Green to grey shale, minor siltstone, interbedded.|fine grained siliciclastic rock|||N||17-JAN-23
Rising Sun Conglomerate|16118|Rising Sun Formation|32556|||Yes|Formation, beds|Formal|Other new published name|Defined|Hatches Creek Group|8139|||Early Cambrian||||deposition|Paleoproterozoic||||||60|NT|No|44960|48860|||||Probably correlates with Andagerra Formation. Previously considered Neoproterozoic to Cambrian, but in 2005 considered Paleoproterozic Hatches Creek Group/ Tomkinson Group correlate. Some or all of the outcrops assigned to this unit in TENNANT CREEK sheet may belong to the Gleeson Formation (Munson, 2016).|Conglomerate and sandstone; monomictic and polymictic orthoconglomerate; channel cross-bedded. Quartz arenite; predominantly medium bedded, parallel- or cross-bedded.|siliciclastic sedimentary rock|||N||17-JAN-23
Ritarango Formation|29328|Ritarango beds|16120|||Yes|Formation, beds|Formal|Defined variation of published name|Defined|Donydji Group|21680|||Statherian|1710||inferred, overlying unit|deposition|Statherian|1726|6|inferred, underlying unit|maximum depositional age||1500|NT|Yes|44112||Rawlings D.J after Dunnet 1965, Plumb & Roberts 1992|||16-MAR-95|Age Palaeoproterozoic (Statherian). Basal age constraint from Mirarrmina Complex.|Sandstone: maroon to white, fine to very coarse grained, locally pebbly or conglomeratic, lithic, cross bedded; minor volcaniclastic sandstone, mudstone; locally foliated and sheared.|siliciclastic sedimentary rock|||N||17-JAN-23
River Supersequence|40577|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Statherian|1630||||Statherian|1645|||||||No|70897||||||Shows rapid thickness and lithofacies variations across regional fault systems. Includes Riversleigh Siltstone and Shady Bore Quartzite.|Siltstone, silty shale, lithic sandstone and sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Riversdale Formation|16135|Riversdale Beds|16134|||Yes|Formation, beds|Formal|Variation of published name|Defined|Shadow Group|37961|||Early Cambrian||||deposition|Early Cambrian||||||30||No|44273|44309|||||Name introduced by Noakes and Carter (1959). Defined by Reynolds (1965). See card file.|Conglomerate, red sandstone and red quartzic dolostone. Forms mesa cappings and low scarps.|medium-coarse grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Riversleigh Siltstone|24472|||||Yes|Formation, beds|Formal|Resvd name published|Defined|McNamara Group|11575|||Statherian|1630|5|inferred, overlying unit|deposition|Statherian|1644|8|isotopic, U/Pb-Pb/Pb ion probe|||3200|QLD|Yes|36227|37459|R.J.Cavaney|24-SEP-76|Whitaker, W.|24-JUL-81|Part of River Supersequence.|Siltstone, carbonaceous siltstone and shale, massive to blocky, silicified very fine sandstone; dolomite, dolomitic siltstone, medium sandstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Roadhouse Formation|83017|||||Yes|Formation, beds|Formal|Reserved|Defined|||||Calymmian|||inferred|diagenesis|Statherian|||inferred|maximum depositional age|||NT|Yes|||Clark, A. (GA)|20-JAN-22|Munson, T. (NTGS)|25-NOV-22|Intersected approx. 10 km southeast of Barkly Roadhouse. Likely underlies roadhouse. Type section: Drill-hole NDIBK10, down-hold depth of 303 m to 724 m. Drilled at 593827mE and 7813094mN (MGA94 zone 53). Drill-core is stored at the NTGS core library in Alice Springs.Significantly older than overlying (unnamed) unit and significantly younger and less deformed than underlying crystalline basement.|Interbedded mudstone to coarse sandstone. Locally turbiditic. Some intervals contain interbeds of dolarenite. Base of unit defined by massive quartz arenite interbedded with conglomerate|siliciclastic sedimentary rock|carbonate sedimentary rock||N||27-APR-23
Roaring Siltstone|16164|Roaring Bore Siltstone|16157|||Yes|Formation, beds|Formal|Unknown or process pending|Redefined|Narpa Group|37962|||Boomerangian|||biozone|deposition|Undillan|||biozone|||75|QLD|No|44278|45052|||||Defined 1961. Redefined 1972.|Finely laminated siltstone, siliceous shale and fine-grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Rolling Downs Group|16267|Rolling Downs Formation|16264|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Cenomanian||||deposition|Barremian||||||1200|QLD|No|44269|44417|||||Defined Qld, Vine and Day (1965). See also Lexicon. Formerly Battle Camp Shale and Wolena Claystone and Urisino beds. Age: ~114-91Ma. At least 1000m thick. Age range from constituent units (Wallumbilla Fm, Winton Fm). Namur Sandstone appears as within Rolling Downs Group on Cobham Lake 100k (2010) and Mount Arrowsmith 25k (2007) maps.|Grey mudstone, siltstone and fine sandstone, minor glauconitic sandstone; locally hardened and partially calcreted grey clayey regolith interpreted as slaked unstable mudstone. Includes quartzite dropstones, sparse marine fossils.|fine grained siliciclastic rock||intracratonic|N||17-JAN-23
Rooneys Formation|24476|Rooney Formation|41409|||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1810|4.5|inferred, intrusive relationship|deposition|Orosirian|1840|4|inferred, overlying unit|||1200|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project. Formerly within the Hatches Creek Group. Intruded by Elkedra Granite and Devils Suite. Age: >1710Ma.|Greywacke, siltstone, subarkosic/sublithic/lithic arenite; minor felsic porphyry; locally schistose|siliciclastic sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Roper Group|16319|Flying Fox Group|35479|||Yes|Group, Suite|Formal|Other new published name|Defined|||||Ectasian|1324|4|inferred, intrusive relationship|minimum depositional age|Calymmian|1589|3|inferred, underlying unit|maximum depositional age|3000|5000|NT|No|46679|23937|||||Age at base: 1493+/-4Ma (SHRIMP U-Pb, Page et al 2000). Previously: Flying Fox Group (Ruker, 1959). Overlies rocks of McArthur, Nathan and Mount Rigg Groups, in different parts of the McArthur Basin. See also Roper River Group. Contains hydrocarbon source and reservoir rocks.|Mudstone-rich formations up to 400m thick, punctuated by formations of cross-stratified quartz arenite up to 300m thick.  Minor pedogenic sedimentary breccia, fluvial sandstone, micritic and intraclastic limestone, and oolitic ironstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Rorruwuy Sandstone|22777|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Spencer Creek Group|29406|||Statherian||||deposition|Statherian|1710||inferred|||90|NT|Yes|22600|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Haines, P.|14-MAR-95|Defn card held [CEB Jul 2002]|Sandstone: white to pink, fine to medium-grained, quartzose, low-angle cross-bedded to flat-bedded, common ripples and mudclasts.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Rosie Creek Sandstone Member|16356|Rosie Creek Sandstone|16358|||Yes|Member, phase|Formal|Variation of published name|Fully described|Sly Creek Sandstone|26142|||Statherian|1735||inferred, overlying unit|deposition|Statherian||||||160|NT|No|42385||||||Numeric age estimated from overlying Tawallah Group units|Sandstone, very fine to very coarse grained and rarely conglomeratic; generally moderately to poorly sorted, sometimes bimodally sorted.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Rover Field volcaniclastic|79075|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Orosirian||||deposition|Orosirian|1842.3|4.5|isotopic, U/Pb-Pb/Pb ion probe|||||No|69187||||||Informal. Sample site and lithology description. Shown as Rover Field Volcaniclastic in Fig.9 only. Area is SW of Tennant Creek.|quartzofeldspathic rock - ?weakly metamorphosed volcaniclastic rocks|siliciclastic sedimentary rock|||N||17-JAN-23
Rowley Granophyre|36771|Rowley Granite|35320|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Hull Granite Suite|36768|Stenian|1075|2|isotopic, Pb/Pb|intrusion|Stenian|||||||NT|Yes|50321|65256|Close, D.F. and Edgoose, C.J.|14-FEB-00|Kruse, P.D.|21-JAN-02|Age: 1075+/-2Ma (Pb-Pb zircon); also stated to be ~1090-1075Ma.  Type Locality: 24 44' 54.97S, 129 29' 22.23E.|Porphyritic biotite-epidote granite with fine grained phenocrysts of feldspar.|acid intrusive rock|||Y||17-JAN-23
Ruby Gap Tonalite|39143|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||intrusion|||||||||No|23733|||||||||||Y||17-JAN-23
Rum Jungle Complex|16439|Rum Jungle Granite|16442|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Neoarchean|2521|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Neoarchean|2545|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48866|48866|||Kruse, P.D.|18-OCT-02|Redefined 2002. Proposer: JH Lally, M Ahmad, after Rhodes (1965). An Archaean dome surrounded by Palaeoproterozoic metasediments and minor volcanics - comprises schist, granite gneiss, BIF and granite. Waterhouse Complex (Waterhouse Dome) included in Rum Jungle Complex in 2004. Samples from Rum Jungle and Waterhouse domes gave crystallisation ages from 5 granites and one diorite in 2545 - 2521 Ma range.|Granitic gneiss, migmatite, metadiorite; fine to coarse granite, porphyritic K-feldspar granite, garnetiferous granite, leucocratic granite; metasediments and banded ironstone.|acid intrusive rock|high grade metamorphic rock||Y||17-JAN-23
Rumbalara Shale|16445|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Lower Cretaceous||||deposition|Lower Cretaceous||||||||No|44946|48890|||||See also Lexicon. This name may be obsolete? Probable correlative of Bulldog Shale in South Australia.|Siltstone, porcellanite, some sandstone. Marine fossils.|siliciclastic sedimentary rock|||N||17-JAN-23
Rungutjirba Gneiss|24482|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|Iwupataka Suite|41816|Statherian|1615|11|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1615|11|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992|48992|L.Offe|21-FEB-75|Brown, M.C.|31-OCT-78|See also misspelling Rungitjurba Gneiss|Fine-grained pink and cream quartzofeldspathic gneiss with quartz and feldspar augen.|high grade metamorphic rock|||N||17-JAN-23
Running Water Member|81865|Running Water Sandstone Member|79751|||Yes|Member, phase|Formal|Resvd name published|Defined|Stairway Sandstone|26147|||Middle Ordovician|462.52||inferred, overlying unit||Middle Ordovician|||||20|30|NT|Yes|||Donnellan, N. (NTGS)|16-APR-20|Normington, V.|16-APR-20|Named for Running Water Yard (53K 285630mE 7307720mN in PALM VALLEY 5449 in HENBURY SG53-01). 28m stratigraphic thickness in the type section from 53K 290859mE 7307211mN (base) to 53K 290785mE 7307245mN (in PALM VALLEY 5449 in HENBURY SG53-01). To be published in Donnellan N et al, in prep. Henbury, Northern Territory, 1:250 000 geological map series explanatory notes, SG53-01. Northern Territory Geological Survey, Darwin.|Extremely pure quartz arenite (up to 95% quartz): coarsely- to very coarsely-grained and variably well-sorted and well-rounded but with syntaxial quartz overgrowths/cement. Variably thinly to thickly bedded but predominantly medium to thickly bedded.|siliciclastic sedimentary rock|||N||02-JUN-23
Russell Charnockite|41851|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Waluwiya Suite|41856|Statherian|||inferred|intrusion|Statherian|||inferred, geochemical correlation||||NT|Yes|72360|67565|D.F. Close, I.R. Scrimgeour, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory.|Undeformed charnockite,orthopyroxene- and clinopyroxene-bearing granite, with rounded phenocrysts of zoned plagioclase 3-5 mm in diameter and pyroxene phenocrysts 1-2 mm in diameter, in a fine-grained groundmass.|acid intrusive rock|||Y||17-JAN-23
Ryans Gap Metamorphics|22797|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|Iwupataka Suite|41816|Paleoproterozoic|||||Paleoproterozoic|1605||||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|02-OCT-91|||Defn card with State Convener (advised 2-Oct-91). Arunta Block.|Muscovite-biotite schist, muscovite-bearing quartzofeldspathic gneiss; leucocratic schistose quartzofeldspathic gneiss; quartz-rich metasediments; feldspathic quartzite|metasedimentary siliciclastic rock|||N||17-JAN-23
Sadadeen Range Gneiss|16493|Sadadeen Range gneiss|24483|||Yes|Formation, beds|Formal|Variation of published name|Described|Hayes Metamorphic Complex|27290|||Paleoproterozoic|||||Paleoproterozoic||||||||No|41665|||||||Biotite-quartz-feldspar augen gneiss|high grade metamorphic rock|||N||17-JAN-23
Saddle Creek Formation|16494|||||Yes|Formation, beds|Formal|Other new published name|Defined|Auvergne Group|787|||Cryogenian||||deposition|Stenian|1049|20|isotopic, U/Pb-Pb/Pb ion probe||160|222|NT|No|32310|48938|||||Previously mapped as Yambarra Beds (Randal, 1962). Max. thickness: >222m. Victoria Basin. Hosts barite at the Saddle Creek deposit.|Basal cross-bedded sandstone; upper siltstone, oolitic dolostone, dolomitic sandstone; minor shale, dolostone, dolarenite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Sahul Group|16515|Sahul Formation|23951|||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Rhaetian|203||||Anisian|245|||||||No|41532|||||| Age: 245-~203Ma.|Interbedded sandstone, limestone, dolomite and shale; minor coal, evaporite and volcanics.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Saint Vidgeon Formation|34027|St Vidgeon Formation|30316|||Yes|Formation, beds|Formal|Other new published name|Defined|Vizard Group|30314|||Statherian|1634|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1640|4|isotopic, U/Pb-Pb/Pb ion probe|deposition||110|NT|No|22538|23937|||||Formerly St Vidgeon Sandstone, St Vidgeon Group?  Mapped as part of the Vizard Formation (now superseded by the Vizard Group).|A succession of dolostone, dolomitic and tuffaceous siltstone, K-metasomatised sedimentary rocks, tuff and chert. At the top are silty dololutite and fine dolomitic sandstone, pyritic black shale, and rare interbeds of dolomitic sandstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Sainthill Suite|81827|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1714|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1732|4|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|||Reno, B. (NTGS)|31-JAN-20|Munson, T. (NTGS)|25-AUG-22|To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Named for Mount Sainthill. Nearest Town is Alateye. Age range from constituent granites.|Fine- to coarse-grained, porphyritic biotite granite. K-feldspar?plagioclase?quartz granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Salthole Gneiss|81146|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Paleoproterozoic|1769.3|2.8|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Paleoproterozoic|1793.8|2.9|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|71255|||||||Mylonitic biotite-quartz-feldspar schistose gneiss sampled. Igneous protolith inferred.|metamorphosed acid igneous rock|||Y||17-JAN-23
Samarkand Pegmatite|26131|Samakand pegmatite|23954|||Yes|Formation, beds|Formal|Other new published name|Redefined|||||Statherian|1648|57|isotopic, Rb/Sr|tectonic process|Statherian|1700||isotopic, Pb/Pb|magmatic crystallisation|||NT|Yes|49036|49036|||Munson, T. (NTGS)|25-AUG-22|See also Samakand pegmatite.|Tourmaline pegmatite, rare aplite, locally layered, white. Pegmatite, pegmatitic granite and leucogranite: fine to coarse-grained to megacrystic, muscovite-tourmaline-bearing, rare beryl and garnet.|acid intrusive rock|||Y||17-JAN-23
Sandbar Sandstone|74206|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Weaber Group|19643|||Visean|||inferred, lithostratigraphic correlation|deposition|Visean|||inferred, lithostratigraphic correlation||||WA|No|61542||||||Newly added to the Weaber Group -  forms part of revision by Gorter et al (2005). Overlain by Sunbird Fm.which may(?) truncate it, or it it pinches out. Geological province: onshore Bonapart Basin/Petrel-Sub-basin.|Loose, very well sorted , fine-grained to rarely medium-grained sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Sandpiper Sandstone|23956|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Flamingo Group|6726|||Valanginian|136|||deposition|Berriasian|142||||||WA|No|41459|42442|A.J.Mory|17-JUL-87||| Age: ~142-~136Ma.|Fine to coarse grained glauconitic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Sandy Blight Quartzite|42367|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Paleoproterozoic||||deposition|Paleoproterozoic|1680|3|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15).  Of the Kintore Domain, Warumpi Province.|Interlayered and strongly foliated quartzite and quartz-muscovite schist with minor metabasite|metasedimentary siliciclastic rock|||N||17-JAN-23
Santo Sandstone|16619|||||Yes|Formation, beds|Formal|Other new published name|Defined|Finke Group|6661|||Carboniferous||||deposition|Upper Devonian||||||||No|48890|48890|||||Equivalent to Idracowra Sandstone|White cross bedded and pebbly sandstone, silty kaolinitic sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Sapper Soak|39119|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Donnellan, N.|18-SEP-03|||Mount Peake 1:250 000 sheet area.|||||N||17-JAN-23
Sarah Granite|72488|Mavericks Monzogranite|73210|||Yes|Formation, beds|Reserved|Reserved|Defined|||Frederick Suite|40071|Statherian||||intrusion|Orosirian|||||||NT|Yes|||Crispe, A.|22-SEP-06|Kruse, P.D.|22-SEP-06|After Lake Sarah, (GDA94) 20deg27'S, 129deg06'E, western THE GRANITES. Informal 'Maverick granite' of industry geologists, 'Maverick monzogranite' of Smith (2000), 'Mavericks Monzogranite' of Dean (2001), `Maverick Monzogranite' of Smith (2001).|Biotite-hornblende monzogranite and granodiorite.|acid intrusive rock|||Y||17-JAN-23
Saunders Granite|27056|Saunders Leucogranite|16637|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||Saunders Suite|31734|Paleoproterozoic|1820|||intrusion|Paleoproterozoic|1850||||||NT|No|39679||P.G.Stuart-Smith|09-SEP-83|||Mapped as part of Cullen Granite by Noakes (1949). May include the Bludells Monzonite [95/28073]. Intended to supersede Saunders Leucogranite? Intrudes Allamber Springs Granite. Different unit from Saunders Creek Formation in WA.|Pink to light grey, fine- to medium-grained, predominantly equigranular mafic to felsic hornblende-biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Saunders Suite|31734|Saunders suite|31711|||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic|||||||NT|No|50586||||||Geochemical suite nomenclature, using Saunders Leucogranite as the type for the suite. Comprising the Saunders and Foelsche Leucogranites|Leucogranite-dominated plutons.|acid intrusive rock|||Y||17-JAN-23
Schaber Hornblende Granite|16670|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Precambrian||||intrusion|Precambrian||||||||No|44964||||||Not used since 1970. Probably obsolete?||acid intrusive rock|||Y||17-JAN-23
Schultz Sandstone Member|37737|Bowthorn Siltstone Member|2444|||Yes|Member, phase|Formal|Resvd name published|Defined|Constance Sandstone|24864|||Calymmian|||inferred, geological correlation|deposition|Calymmian|||inferred, geological correlation||140|500|QLD|Yes|24442||Rawlings, D.|22-NOV-02|Withnall, I.W.|09-MAY-06|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area. Said to incorporate Bowthorn Siltstone Member [?]. This unit was said to be equivalent to the redefined (Hutton et al. 2008) Constance Sandstone and thus obsolete in 2008, but unit continues to be used by both NTGS and GSQ in 2013.|Massive, yellow to white, subfriable medium- to coarse-grained, well-sorted quartz sandstone; some granule layers present. Sandstone becomes medium-grained up-section. very pure med-gr. qtz.sst.with siliceous cement to top; cross-bedded thro'out.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Scinto Breccia|16675|Scinto Breccia Member|16674|||Yes|Formation, beds|Formal|Variation of published name|Defined|El Sherana Group|24261|||Orosirian|1829|||deposition|Orosirian|1845||||||NT|Yes|34528||Needham, R.S.||Brakel, A.|14-FEB-86|Owing to its distinct lithology (hematitic siliceous breccia) which does not occur in any of the other units of the group, it is proposed to elevate its status to that of formation (2001). Lenses at base of Coronation Sandstone.|Pinkish-brown, quartz-haematite polymictic pebble breccia, commonly phosphatic; minor hematitic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Scrutton Volcanics|16698|Scrutton Formation|16697|||Yes|Formation, beds|Formal|Other new published name|Redefined|||||Orosirian|1851|7|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1851|7|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|44287|42812|||||Defn on Tech. File E/53-8. Redefined 1993.|Massive pink, purple-grey and green-brown porphyritic volcanic rocks of rhyolitic to dacitic composition; abundant broken crystals and fiamme indicate ignimbrites; rhyodacitic air-fall tuffs; interbedded sandstone and mudstone; local basalt.|acid volcanic rock|||N||17-JAN-23
Seale Sandstone|28991|Seale Formation|37859|||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Calymmian|1605|12|isotopic, U/Pb-Pb/Pb ion probe|||111|NT|No|28255|48943|||||Birindudu basin.|Fine to medium grained quartz sandstone, feldspathic sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Seigal Volcanics|16726|Peters Creek Volcanics|15114|||Yes|Formation, beds|Formal|Resvd name published|Defined|Tawallah Group|17902|||Statherian|1760|||deposition|Orosirian|1815|14|inferred, underlying unit|deposition||1600|NT|Yes|35114|45162|Plumb K.A., Sweet I.P.|15-MAY-74|Strusz, D.L.|19-JUN-74|Represents lower part of Peters Creek Volcanics as originally mapped by Roberts et al,1963. Maximum depositional age for constituent Carolina Sandstone member is 1863+/-6 Ma, which is older than that for the underlying Westmoreland Conglomerate: see RefID 69383. Hosts a number of uranium and gold deposits.|Vesicular and amygdaloidal basalt; massive non-vesicular basalt; thin siltstone, sandstone and tuff interbeds|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Sentinel beds|16750|||||Yes|Formation, beds|Informal|Other new published name|Described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|42699||||||Not related to Sentinel Range Igneous Complex, Qld.|Foliated quartzite; quartz mica +/- garnet schist|metasedimentary siliciclastic rock|||N||17-JAN-23
Septimus Limestone|16758|Mount Septimus Limestone|13095|||Yes|Formation, beds|Formal|Other new published name|Defined|Langfield Group|10161|||Tournaisian||||deposition|Tournaisian||||||180|NT|No|44965|45038|||||Defined as Septimus Formation by Guillaume (1966). See also Lexicon. SD52-10,14. Formerly called "Mount Septimus Series", "Mount Septimus Limestone".|Dolomitic and calcareous sandstone, minor limestone.|carbonate sedimentary rock|||N||17-JAN-23
Settlement Creek Dolerite|38902|Settlement Creek Volcanics|16775|||Yes|Formation, beds|Formal|Defined variation of published name|Redefined|Tawallah Group|17902|||Statherian|1725||inferred, overlying unit|intrusion|Statherian|1730||inferred, intrusive relationship||20|200|NT|Yes|60574|65340|Rawlings, D.|18-AUG-03|NT SNSC|18-AUG-03|See also Settlement Creek Volcanics (accidently re-used in 2010).|Extensive sills; cores are medium to coarse grained, aphyric to locally porphyritic, ophitic and subophitic textures, comprising plagioclase, pyroxene and opaque oxides; incipiently altered; jointing common; hornfelsed contacts and rafts.|basic intrusive rock|basic volcanic rock||Y||17-JAN-23
Shadforth Sandstone|25472|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Katherine River Group|9312|||Statherian|1730||inferred|deposition|Statherian|1745||inferred|||50|NT|No|44400|24050|||Beier, P.|30-NOV-98|In parts of Mount Marumba, Milingimbi, Katherine, Mount Evelyn 1:250 000 sheet areas. See also Shadforth Formation.|White, pink or grey, trough cross-bedded, medium to very coarse, poorly sorted quartz sandstone with scattered granules or pebbles; trough cross-bedded, well sorted medium to coarse, quartz sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Shadow Group|37961|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Middle Cambrian||||deposition|Neoproterozoic|||||||NT|Yes|61404||Kruse, P.D.|30-JAN-03|Kruse, P.D.|30-JAN-03|Oban Subbasin, Toko Syncline etc, Georgina Basin (Geology of Queensland 2013, p90). Previously included in Mopunga Group of Smith (1964) in part, Cnetral Mount Stuart beds of Smith & Milligan (1964) in part etc.|Includes massive ferruginous sandstone, cross-bedded sandstone, conglomerate, red and green shale, mudstone and dolomite; basal tillite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Shady Bore Quartzite|16787|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|McNamara Group|11575|||Statherian|1635|7|isotopic, U/Pb||Statherian|1647||inferred, underlying unit||40|590|QLD|Yes|36227|37459|R.J.Cavaney|24-SEP-76|Whitaker, W.|24-JUL-81|See also misspelt Shady Bore Siltstone. Part of River Supersequence.|Mapped as massive white fine-grained well-sorted quartzite. Sample is a clean white medium-graned quartz sandstone with rare muscovite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Shady Bore Quartzite, Plain Creek Formation, Lawn Hill Formation|72395|||||Yes|Formation, beds|Informal|Variation of published name|Described|McNamara Group|11575|||Statherian||||deposition|Statherian||||||||No|||||||Informal grouping of units of the upper McNamara Group to be used for Northern Territory 1:1 million geological map, National Maps Project.|Very fine to coarse grained lithic and sublithic sandstone, interlaminated siltstone and fine grained sandstone; micaceous sandstone, siltstone and shale; dolomitic siltstone, dolostone; minor pebble conglomerate, pebble- to boulder-bearing mudstone|siliciclastic sedimentary rock|||N||17-JAN-23
Shannon Formation|16797|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Late Cambrian|497||inferred, geological correlation|deposition|Middle Cambrian|502||inferred, geological correlation|||700||No|48890|48890|||||Stromatolitic and oolitic.|Siltstone, shale; fossiliferous limestone, dolomite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Shaw Granite|41151|||||Yes|Formation, beds|Informal|Resvd name published|Briefly described|||||||||intrusion|||||||||No|50286|||||||Granite.|acid intrusive rock|||Y||17-JAN-23
Sheridan Member|29329|Sheridan Formation|26893|||Yes|Member, phase|Formal|Defined variation of published name|Redefined|Fagan Volcanics|24971|||Statherian|1710||inferred, overlying unit|deposition|Statherian|1707||inferred, underlying unit||200|400|NT|Yes|44112|44112|Rawlings D. after Plumb & Roberts 1965, 1992||Haines, P.|16-MAR-95|Age: Palaeoproterozoic (Statherian). Within the Donydji Group.|Sandstone: cross-bedded, medium to coarse-grained, lithic; interbedded with mudstone: ferruginous, micaceous; local volcaniclastic breccia, conglomerate and sandstone; locally sheared.|siliciclastic sedimentary rock|||N||17-JAN-23
Sherwin Formation|40033|Sherwin Ironstone Member|16833|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Maiwok Subgroup|25195|||Ectasian||||deposition|Ectasian|||||10|100|NT|No|24047|23937|||||Within the Roper Group. Two type areas nominated by Abbott et al. (2001) are no longer accessible; a new type section/area is required. Hosts the Roper Bar and Roper River Projects oolitic Fe deposits. To be extended into subsurface by Alastair Stewart for the basement geology of the Exploring for the Future area.|Interbedded coarse to fine grained ferruginous sandstone, siltstone, mudstone, pisolitic ironstone|siliciclastic sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Shillinglaw Formation|22837|Mount Shillinglaw Formation|81595|||Yes|Formation, beds|Formal|Other new published name|Defined|Namerinni Group|38414|||Calymmian||||maximum depositional age|Statherian||||maximum depositional age||650|NT|No|23410|24303|||||Originally reserved for Fons VandenBerg for use in Victoria, was no longer required then used in the NT in 1998 -  DEFINED by Hussey et al (2001). Previously mapped as undifferentiated Tomkinson Creek beds.|Dolomitic mudstone, dolostone, sandstone and siltstone; interbedded sandstone and siltstone; quartzose dolostone; minor rudstone and bafflestone; microbialite, stromatolitic bioherms, angular solution breccia; conglomerate; chertified probable tuff.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Shoal Reach Formation|16839|||||Yes|Formation, beds|Formal|Other new published name|Defined|Auvergne Group|787|||Cryogenian||||deposition|Cryogenian||||||100|NT|No|32310|48938||||||Quartzose and silty dolostone, dololutite, dolarenite, dolostone, sandstone; minor siltstone and shale; local intraformational conglomerate.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Shoobridge Granite|24493|Mount Shoobridge Granite|13099|||Yes|Formation, beds|Formal|Other new published name|Defined|||Shoobridge Suite|31733|Orosirian|1775|16|isotopic, U/Pb|intrusion|Orosirian|1850||||||NT|Yes|46676|42012|Mulder C.A.|06-JAN-89|Kruse, P.D.|15-DEC-88|Definition card to published name. Pine Creek Province.  Intrudes the Mount Partridge, South Alligator and Finniss River Groups.|Dark grey to pink, mainly porphyritic hornblende-biotite granite, core of leucocratic granite and fringe of hornblende-biotite granodiorite.|acid intrusive rock|||Y||17-JAN-23
Shoobridge Suite|31733|||||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic||||||||No|70866||||||Pine Creek Province. Includes Shoobridge Granite.|Zoned, hornblende-dominated granites.|acid intrusive rock|||Y||17-JAN-23
Short Range Sandstone|26139|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tomkinson Creek Group|18318|||Statherian||||deposition|Statherian||||||850|NT|Yes|33307|35771|Mendum J.R., Tonkin P.C. (submitted by D.E. Gardner)|25-MAY-77|Wells, A.T.||Parts previously mapped as Hayward Creek Formation. Age: <1780Ma.|Thinly to very thickly bedded, fine- to coarse-grained sandstone; minor thinly bedded micaceous fine-grained sandstone and siltstone, and lesser laminated mudstone; some pebbly sandstone and conglomerate lags; rare halite pseudomorphs.|siliciclastic sedimentary rock|||N||17-JAN-23
Shovel Billabong Andesite|23967|||||Yes|Formation, beds|Formal|Other new published name|Described|South Alligator Group|17111|||Orosirian|1850|||eruption|Orosirian|1863|||||300||No|37579||P.G.Stuart-Smith|25-OCT-78|||Conformable with units in South Alligator Group. With Gerowie Tuff, is interbedded within upper part of Koolpin Formation|Dull grey-green, massive pitchstone, variolitic andesite and porphyritic microdiorite.|intermediate volcanic rock|||N||17-JAN-23
Showell Member|41979|Showell Creek Member|30265|||Yes|Member, phase|Formal|Variation of published name|Defined|Mainoru Formation|11034|||Calymmian|1492|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Calymmian|1493|4|isotopic, U/Pb-Pb/Pb ion probe||64|346|NT|No|60573|23937|||||Showell Member is here defined as a new name - but reserved by Young as Showell Creek Member.  Young and Sweet both authors of same pubn. (URAPUNGA and ROPER RIVER Explan. Notes, 2001) yet Sweet states synonymy "none known"? Ages from 'rare tuffs within Showell Member'  (Munson, 2016), which is at the top of the Mainoru Formation (although note that these ages have previously been described as from samples from 'the lower part of the Mainoru Formation (Jackson et al., 1999), and shown in Abbott & Sweet, 2000, and  Abbott et al 2001, as from the Wooden Duck Member (Jackson et al., 1999). Can be difficult to distinguish from Wooden Duck Member (Smith, 2016).|Finely laminated calcareous mudstone with scattered glauconite, sulfides and nodular carbonate-cemented laminae; colour ranges from greenish-grey to greenish-black to black.  Rocks become increasingly silty and glauconitic upwards.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Silurian sedimentary rocks 76715|76715|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Pridoli|410|||deposition|Llandovery|434|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Simpsons Gap Metasediments|24495|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Iwupataka Metamorphic Complex|24318|||Paleoproterozoic|||||Paleoproterozoic|||||||NT|Yes|48992|48992|L.Offe|11-MAR-75|Brown, M.C.|31-OCT-78|Arunta Block.  Intruded by both the Burt Bluff Gneiss and Rungutjirba Gneiss. Intruded by dolerite dykes of the Stuart Dyke Swarm.|Biotite-muscovite-feldspar-quartz metasediment, staurolite-garnet-feldspar-biotite-muscovite-quartz schist, muscovite-biotite schist, quartzofeldspathic gneiss; metaconglomerate at base|metasedimentary rock|||N||17-JAN-23
Sir Frederick Conglomerate|16942|||||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Early Cambrian||||deposition|Ediacaran||||||||No|48842|48842||||||Sequence of pebble, cobble and boulder conglomerate with kaolinitic sandstone matrix and thin beds and lenses of sandstone and pebbly sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Sir Rodericks Metagabbro|82040|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Whelan, J. (NTGS)|09-SEP-20|||Named for the Sir Rodericks Rocks. Occurs on the Gove 250k map sheet. Nearest town =  Nhulunbuy. To be published = 2020 in the Gove Special 1:100 000 geological map series explanatory notes. Occurs as xenoliths in plutons of the Nhulunbuy Suite.|Typically fine- to medium grained, aphyric and equigranular metagabbro, metagabbronorite and metadiorite.|metamorphosed basic igneous rock|||Y||17-JAN-23
Skinner Sandstone|26141|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Duerdin Group|5760|||Cryogenian||||deposition|Cryogenian||||||100|NT|No|32699|48938|||||Truncates Angalarri Sltst and Saddle Cr.Fm on AUVERGNE; overlies Angalarri Sltst. on WATERLOO. Thickness: 100m. Not the same unit as the informal  "Skinner Glacials" in Qld. Wolfe basin.|Basal diamictite, medium and coarse quartz sandstone, dolomitic sandstone, conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Skull Creek Formation|16978|Skull Creek Limestone|16981|||Yes|Formation, beds|Formal|Variation of published name|Defined|Bullita Group|2914|||Calymmian||||deposition|Calymmian|1609|8|isotopic, U/Pb-Pb/Pb ion probe||160|230|NT|No|32699|48943|||||Basis for age not clear. Birindudu Basin.|Silty and quartzic dolostone, dolostone, dolomitic sandstone, dolomitic siltstone, sandstone, minor dolarenite, chert.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Slatey Creek Granite|26900|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Grimwade Suite|40137|Statherian|1700|62|isotopic, Rb/Sr|intrusion|Statherian|1796|5|isotopic, U/Pb-Pb/Pb ion probe||60||WA|Yes|46788|45140|Blake D.H.|08-NOV-74|WA SNSC|06-JAN-75|Tanami Province. Previously of the Frederick Suite. Appears to have been moved into the Grimwade Suite in 2013, NTGS Special publicaiton 5, p11:12.|Porphyritic and non-porphyritic, mainly medium to fine grained, muscovite, biotite-muscovite, and biotite monzogranite; minor biotite granodiorite. Some pegmatite and aplite veins.|acid intrusive rock|||Y||17-JAN-23
Sliding Rock Metamorphics|16999|Sliding Rock metamorphics|24497|||Yes|Formation, beds|Formal|Unknown or process pending|Briefly described|||Jennings Suite|30859|Mesoproterozoic|||||Paleoproterozoic||||||||No|9199||||||Of Narwietooma Metamorphic Complex.|Quartzofeldspathic gneiss, biotite schist, granitic gneiss, hornblende gneiss, amphibolite; minor garnet-biotite gneiss, quartz rich biotite gneiss; rare kyanite-bearing gneiss|high grade metamorphic rock|||N||17-JAN-23
Slippery Creek Siltstone|17000|||||Yes|Formation, beds|Formal|Other new published name|Defined|Habgood Group|7964|||Statherian|||inferred, overlying unit|deposition|Statherian|||inferred||||NT|No|42597|43010||||||Predominantly red, purple and dark green laminated micaceous mudstone and minor fine-grained sandstone and muddy dololutite; some beds are pyritic, mainly near the base. Large concretions common locally. Weathered outcrop is ferruginised.|siliciclastic sedimentary rock|||N||17-JAN-23
Sly Creek Sandstone|26142|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Tawallah Group|17902|||Statherian|1760|||deposition|Statherian|1787|17|isotopic, U/Pb-Pb/Pb ICP-MS|||770|NT|No|44306|65340|||||Defn on Tech File SE53-8. Numeric age estimates are inferred and poorly constrained  (McArthur Basin tectonostrat map, Rawlings, 2001). Earlier and 2010 ref give Sly Creek Sandstone as overlying McDermott Fm. In 2006 the McDermott Formation was said to overlie the Sly Creek Sandstone in Robinson Range area and the rocks previously assigned to the Sly Creek Sandstone on the Wearyan Shelf were reassigned to the Wununmantyala Sandstone. Sly Creek Sandstone is now confined to the Batten Fault  Zone and the southwestern McArthur Basin, where it overlies Seigal Volcanics. See 2013 NTGS Special Publication 5, p 15:11 discussion.|Lithic and quartz sandstone, minor siltstone and conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Smythe Sandstone|17019|Smythe Sandstone Member|17017|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Nathan Group|26072|||Statherian|1613|4|inferred, overlying unit|maximum depositional age|Statherian|1614|4|inferred, underlying unit|||250|NT|No|44287||||||Type section located in northern Bauhinia Downs map sheet. Defn on Tech File E/53-3. Upgraded to formation status by Haines et al (1993), superseding Smythe Sandstone Member of Jackson et al (1987). Originally mapped as "Smythe Sandstone" on BAUHINIA DOWNS (Smith 1964) and "Mount Birch Sandstone". Maximum depositional age of 1605 +/-14 Ma comes from sample from the top of the formation. Tuffs in overlying Balbirini Dolostone have been dated at 1613 +/- 4Ma which is within the error of the MDA for Smythe Sandstone top.|Ridge-forming sandstone and conglomerate. Massive coarse polymict conglomerate, pebbly lithic sandstone, dolomitic sandstone and dolarenite; typically poorly sorted and trough cross-bedded.|siliciclastic sedimentary rock|||N||17-JAN-23
Snowdrop Sandstone Member|33827|||||Yes|Member, phase|Formal|Resvd name published|Defined|McKay Sandstone|11552|||Statherian|1720||inferred, intrusive relationship|deposition|Statherian|1822||inferred, underlying unit|maximum depositional age||50|NT|No|23867|23867|Sweet I.|24-DEC-99|||In Snowdrop 1:100 000 sheet area,  Defn to be published in the Mount Evelyn 1:250 000 sheet 2nd ed. explanatory notes. Within the Kombolgie Subgroup (Katherine River Group).|White medium bedded and trough cross-bedded, medium quartz sandstone with scattered mudstone intraclasts; thinly to medium bedded, wave-rippled, medium to coarse quartz sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Soldiers Creek Granite|17092|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Allia Creek Suite|39136|Orosirian|1760|27|isotopic, Rb/Sr|intrusion|Orosirian|1860||inferred, intrusive relationship|||||No|45022||||||Pine Creek Province. Intrudes Burrell Creek Formation. Although this unit has a U/Pb SHRIMP zircon maximum intrusion age of 1876+/-12 Ma, Pb loss, alteration and metamorphism are likely to have affected this result. Emplacement of the Soldiers Creek Granite can be better constrained by recent geochronological studies of the Wangi Basics and Burrell Creek Formation (RefID 64956).|Muscovite leucogranite, coarse-grained with greisen veins; muscovite-tourmaline pegmatite with associated cassiterite.|acid intrusive rock|||Y||17-JAN-23
South Alligator Group|17111|||||Yes|Group, Suite|Formal|Other new published name|Defined|Cosmo Supergroup|72987|||Orosirian|1863|2|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|2025|||||5000|NT|Yes|46678||Needham, R.S.||Brakel, A.|14-FEB-86|See also Lexicon. Includes: Mount Bonnie Formation, Gerowie Tuff, Koolpin Formation. Probably no longer includes Fisher Creek Siltstone -  included now with Finniss River Group. Age around 1885 Ma. Intruded by Cullen granite and Zamu Dolerite. Hosts the Thunderball vein-type U deposit and the Quantum REE prospect.|Quartz-sericite and quartz-chlorite-sericite schist, siltstone, phyllite, chert, pitchstone, andesite, saccharoidal quartzite (after carbonate).|metasedimentary siliciclastic rock|intermediate volcanic rock||N||17-JAN-23
South Nicholson Basin - strongly magnetic rocks 79936|79936|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Mesoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. See also 'Proterozoic rocks - undivided - highly magnetic 74563' used for Basement Geology of Northern Queensland.|Unknown.||||U||17-JAN-23
South Nicholson Group|17123|||||Yes|Group, Suite|Formal|Other new published name|Redefined|||||Ectasian|1400||inferred, geological correlation|deposition|Calymmian|1493|8|isotopic, U/Pb-Pb/Pb ion probe|||9000||Yes|44306||||||Defn on Tech File E/53-12. Redefined 2005. Redefinition published 2008. Group extends across NT-QLD border and consistuents appear to be defined both sides of border. Age by correlation with Roper Group. Shale Rb-Sr date at: 1480 Ma from 1991. See 2006 Accident Subgroup definition. Camooweal-Murphy Domain (Geology of Queensland 2013, p52). Includes oolitic Fe deposits. Maximum depositional age of 1602 +/- 22 Ma (from basal Hedleys Sandstone), but post-dates the 1550-1500 Ma Isan Orogeny.|Quartz sandstone interstratified with siltstone and shale. Mainly medium- to coarse-grained, fluvial and shallow-marine quartz sandstone in lower half; deeper marine, finer-grained lithologies (glauconitic sandstone, siltstone, shale) in upper half.|siliciclastic sedimentary rock|||N||17-JAN-23
Southwark Suite|40018|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Calymmian|1567||inferred, geochemical correlation|intrusion|Calymmian|1570||inferred, structural relationship|||||No|50369||||||Age: ~1570Ma. In the Arunta region - Aileron Province. Component plutons include the Southwark Granite Suite and several granites. Probably does not include the Paleoproterozoic Wabudali Granite, Yaloolgarrie Granite or Yumurrpa Granophyre (interpreted from older references and some map legends to be part of the Suite)|Megacrystic biotite and muscovite-biotite granite, minor even-grained granite.|acid intrusive rock|||Y||17-JAN-23
Southwark Suite - highly magnetic 80683|80683|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||Southwark Suite|40018|Calymmian|||||Calymmian||||||||No|||||||Subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area.|Part of: megacrystic biotite and muscovite-biotite granite, minor evenly grained granite, leucogranite, pegmatite, aplite.|acid intrusive rock|||Y||17-JAN-23
Speares Metamorphics|22869|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Yaya Metamorphic Complex|41858|Madderns Yard Suite|33044|Statherian|||inferred||Statherian|||inferred||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|01-JUL-91|||Defn card with State Convener (advised 2-Oct-91). Previously mapped as part of the Mount Zeil granulite. Of Warren and Shaw (1995). The eastern extent of the Yaya Domain.|Migmatitic banded quartzofeldspathic gneiss; migmatitic biotite gneiss; paragneiss, locally sillimanite-bearing|high grade metamorphic rock|||Y||17-JAN-23
Speewah Group|17150|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Statherian|1762|15|isotopic, Rb/Sr|deposition|Orosirian|1834|3|isotopic, U/Pb-Pb/Pb ion probe||1500|1700||No|44317||||||Previously part of Kimberley Basin, now redefined as Speewah Basin. Also dated at 1835 Ma. Of the Halls Creek Orogen.|Lithic and feldspathic sandstone, quartz sandstone, chloritic and micaceous siltstone, shale; minor rhyolitic ashstone and tuff; metamorphosed.|siliciclastic sedimentary rock|igneous volcanic rock||N||21-SEP-23
Spencer Creek Group|29406|Spencer Creek Volcanics|17152|||Yes|Group, Suite|Formal|Defined variation of published name|Redefined|||||Statherian|1717|11|isotopic, U/Pb-Pb/Pb ion probe||Statherian|1712|5|isotopic, U/Pb-Pb/Pb ion probe|||1500|NT|Yes|71606|44112|Rawlings R.J, after Dunnet, 1965, Plumb & Roberts, 1992||Haines, P.|14-MAR-95|Constituent Formations: Yanungbi Volcanics, Gove Sandstone, Yuduyudu Formation, Cato Volcanics, Rorruwuy Sandstone.  The 1712 +/- 5 Ma age derived from the Yanungbi Volcanics at the base of the Group.  The 1717+/-11 Ma age is from the Cato Volcanics at the top of the Group. Caledon Shelf, McArthur Basin. Different unit from Spencer Sandstone, also in NT.|Quartzose and lithic sandstone, mudstone; shallow rhyolitic intrusions and volcanics; high-level microgranite plutons.|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Spencer Creek Group, Upper|72387|||||Yes|Subgroup|Informal|Variation of published name|Described|Spencer Creek Group|29406|||Statherian||||deposition|Statherian||||||||No|||||||Informal grouping of units of the upper Spencer Creek Group to be used for Northern Territory 1:1 million geological map, National Maps Project.  Includes Gove Sandstone, Yuduyudu Formation, Cato Volcanics, Rorruwuy Sandstone.|White to pink, partly ferruginous, fine to very coarse grained, quartzose sandstone, local pebbles and cross bedding; mudstone; porphyritic rhyolite with phenocrysts of Kfeldspar, quartz, plagioclase and pyroxene|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Spencer Sandstone|17153|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Auvergne Group|787|||Cryogenian||||deposition|Cryogenian|||||140|170|NT|No|32310|48938|||||Different unit from Spencer Creek Group.|Basal thinly-bedded, fine- or medium-grained quartz sandstone; silty sandstone; dolomitic sandstone typical of upper part. Includes halite casts and pseudomorphs.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Spinifex Gabbro|77798|Spinifex Metagabbro|75793|||Yes|Formation, beds|Formal|Variation of reserved name|Described|||||Statherian||||magmatic crystallisation|Statherian|1796|7|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||Edgoose, C., Beyer, E. (NTGS)|11-FEB-13|||To be published = "Beyer EE, Edgoose CJ, Vandenberg LC, Webb GP and Petrick CM, in prep. Alcoota, Northern Territory. 1:250 000 Geological Map Series Explanatory Notes, SF5310. Northern Territory Geological Survey, Alice Springs". Year of publication will be 2013. Also Alcoota 2nd edition 1:250,000 geological map. Is interpreted as intruding the Bleechmore Metamorphics.|Metamorphosed quartz gabbro characterised by a fine-grained assemblage of polygonal plagioclase, orthopyroxene, clinopyroxene, biotite and minor quartz.|metamorphosed basic igneous rock|||Y||17-JAN-23
Split Rock Sandstone|17180|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Middle Cambrian||||deposition|Middle Cambrian||||||50|QLD|No|34395|44210|||||See also Lexicon. Eastern Georgina Basin.|Fine grained quartz sandstone, siltstone, shale|siliciclastic sedimentary rock|||N||17-JAN-23
Spriggs Gneiss|79067|Spriggs Camp Member|75906|||Yes|Formation, beds|Formal|Variation of reserved name|Briefly described|Harts Range Metamorphic Complex|36822|||Cambrian|497|10|isotopic, U/Pb-Pb/Pb ICP-MS|metamorphism|Neoproterozoic|1701|9|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|69917||||||Eastern Arunta Region - Irindina Province.  U/Pb LA-ICPMS zircon dating, Hf analytical data. Dating gives max. depositional age, however, given its stratigraphic location within the Harts Range Metamorphic Complex, the sedimentary protolith of this rock is likely to have been deposited some time during the late Neoproterozoic.|Sillimanite-garnet metapelite, locally migmatitic and with intense foliation.|metasedimentary siliciclastic rock|||N||17-JAN-23
Stafford Granite|42234|Anmatjira Orthogneiss|466|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Statherian|1795|4||intrusion|Paleoproterozoic|1820|||||||No|23809|||||||Granite.|acid intrusive rock|||Y||17-JAN-23
Stafford Suite|81268|||||Yes|Group, Suite|Informal|Other new published name|Mentioned|||||Statherian|1795|||intrusion|Orosirian|1815|||intrusion||||No|70554||||||?Possibly an igneous province that includes the Stafford Granite as well as other felsic and mafic rocks.|||||Y||17-JAN-23
Stag Creek Volcanics|17236|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Namoona Group|13724|||Orosirian|||inferred|eruption|Orosirian|2048|13|isotopic, U/Pb-Pb/Pb ion probe|||1000||No|46678||||||See also Lexicon. Interfingers with Masson Formation, therefore overlies and underlies in places. 2021 +/- 10 Ma U/Pb SHRIMP age is the maximum age of extrusion. Previous studies gave ages of xenocrystic zircons ~2048 Ma [Worden et al. 2008].|Altered, massive, fine amygdaloidal and slightly porphyritic basalt and basaltic andesite, basaltic agglomerate, mafic volcaniclastic shale and arenite.|basic volcanic rock|||N||17-JAN-23
Stairway Sandstone|26147|Stairway Greywacke|29017|||Yes|Formation, beds|Formal|Variation of published name|Defined|Larapinta Group|10184|||Upper Ordovician|458|||deposition|Lower Ordovician|478|||||600|NT|No|48863|45036|||||Includes first complete Ordovician vertebrates from Australasia. Basal fauna correlated with middle part of  Rowena Formation, Mutawintji Group, western NSW. Numerical ages from 1991 reference. Hosts the Mereenie oil and gas and Palm Valley gas fields. Has unconventional petroleum potential.|Thinly bedded, fine to medium clean sandstone; minor interbedded sandy limestone, coarse sandstone, medium silty sandstone, phosphorite, marine fossils.|medium-coarse grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Stanbroke Sandstone|17256|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian||||deposition|Statherian|||||||QLD|Yes|46960|49009|D.H.Blake, R.J.Bultitude|11-OCT-77|Whitaker, W.|10-DEC-80|Previously reserved as Stanbroke. Previously mapped as part of the Argylla Formation (Carter & Opik 63).|Quartz arenite, feldspathic arenite, calcareous arenite, limestone, greywacke, siltstone, local basal conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Stanley Metamorphics|37624|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Neoarchean|2535||inferred, isotopic correlation||Neoarchean|2600||||||NT|Yes|61389||Lally, J.H. & Ahmad, M,|18-OCT-02|Kruse, P.D.|18-OCT-02|Rum Jungle Dome. Different unit from other Stanley nomenclature in Vic, Qld. and Tas. Occurs as enclaves in Rum Jungle Complex. Possibly correlated with Dirty Water Metamorphics in which case age is between 2675-2545 Ma (Pietsch & Stuart-Smith 1987, Lally 2002).|Schist, gneiss, banded iron formation and some intrusive granite.|metasedimentary siliciclastic rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Stanovos Gneiss|75910|Stanovos Gneiss Member|27279|||Yes|Formation, beds|Formal|Variation of published name|Described|Harts Range Metamorphic Complex|36822|||Early Cambrian|||||Neoproterozoic||||||||No|62595||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas. Check age. Previously considered much older [CEB Sept-2012]|Quartzite, grossular-diopside-wollastonite marble, calc-silicate and minor metapelite; overlain by garnet-poor metapelite with amphibolite, quartzofeldspathic gneiss and quartzite.|high grade metamorphic rock|||N||17-JAN-23
Steamboat Sandstone|17310|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Miaolingian|||biozone|deposition|Miaolingian|||biozone||17|221||No|44273|44309||||||Quartz and calcareous sandstones with interbeds of quartzic grainstone and quartz dolostone; minor siltstone. Diverse trilobite fauna.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||12-JUL-23
Stirling Sandstone|17338|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Limbunya Group|10414|||Statherian|1653||inferred, overlying unit|deposition|Statherian|1830|13|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||120|NT|No|28255|48943|||||Type section 120m thick. Correlated with Masterton Sandstone. Birindudu Basin. Max depositional age from Stirling Sandstone, but note that max depositional ages from various parts of underlying Birrindudu Group are younger (a foliated granite underlying basal conglomerate is 1794+/-4 Ma, sublithic sst from Coomarie Range gives Max dep age: 1812+/-8 Ma).|Quartz arenite, dolomitic sandstone, conglomerate|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Stokes Siltstone|17363|Stokes Formation|17361|||Yes|Formation, beds|Formal|Variation of published name|Defined|Larapinta Group|10184|||Upper Ordovician||||deposition|Darriwilian||||||650|NT|No|44495|45041|||||Previously combined with Carmichael Sandstone as "Stokes Formation" (Prichard and Quinlan, 1962).|A succession of interbedded shale and siltstone, with thin beds of silty-sandy limestone containing abundant fossil debris; red shale and lesser grey-green siltstone; and interbedded red to green shale, grey-green siltstone and fine sandstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Stonewall Sandstone|17367|||||Yes|Formation, beds|Formal|Other new published name|Described|Carr Boyd Group|3663|||Tonian||||deposition|Stenian||||||||No|44363|||||||Subfriable medium- to coarse-grained quartz sandstone, subordinate argillaceous and feldspathic sandstone, granule sandstone, red shale.|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Strangways Impact Breccia|72401|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Neoproterozoic|||||Neoproterozoic||||||||No|||||||Lithology referring to an informal unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Granite gneiss breccia, melt rocks|high grade metamorphic rock|||N||17-JAN-23
Strangways Metamorphic Complex|17395|Strangways Range Metamorphic Complex|17398|||Yes|Group, Suite|Formal|Other new published name|Redefined|||||Statherian|1790||||Orosirian|1860|70|||||NT|Yes|9199|48992|Shaw R.D., Warren R.G.|01-FEB-79|Branch, C., Brown, M.|01-MAR-79|Geological Province: Arunta Block (Division 1). Previously included what is now known as Denara Orthogneiss.|Quartzofeldspathic gneiss; biotite gneiss; various schists; calc-silicate rock.|high grade metamorphic rock|metasedimentary rock||Y||17-JAN-23
Strawbridge Breccia|26914|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Statherian|||||Statherian||||||100|NT|No|44299|43010|||||Formerly of the McArthur Group.|Chert breccia: relict microbial laminations, stromatolites, intraclastic conglomerates, ooids; locally ferruginous and manganiferous.|siliciclastic sedimentary rock|||N||17-JAN-23
Stray Creek Sandstone|17418|Stray Creek Sandstone Member|27903|||Yes|Formation, beds|Formal|Variation of published name|Defined|Tolmer Group|18275|||Mesoproterozoic|1700|||deposition|Paleoproterozoic|1825|||||800|NT|Yes|39679||Edgoose C.||Brakel, A.|23-JAN-85|Fully defined by Walpole and others (1968), as the Stray Creek Sandstone Member of the Buldiva Sandstone, Tolmer Group; now upgraded and the name Buldiva Sandstone is discarded. Age apparently poorly constrained. 2011 map says Mesoproterozoic, 2013 NT volume says Paleoproterozoic.|Flaggy quartz sandstone, green siltstone and shale, dolomitic in places, commonly glauconitic and ripple-marked.|siliciclastic sedimentary rock|||N||17-JAN-23
Stretton Sandstone|17426|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Batten Subgroup|1257|||Statherian|||inferred|deposition|Statherian|||inferred|magmatic crystallisation||160|NT|No|44434|45162|||||Defn on Tech File E/53-3.  Within the McArthur Group. Material dated was from a tuff bed near the base of the unit [Info from Geochron Delivery]. Base of this unit forms base of Term Supersequence of Jackson et al. (2000), so nature of contact with underlying Yalco Formation  (which appears conformable) has been questioned. Whole of McArthur Group is within NTGS Glyde package.|Green to grey-brown, fine- to medium-grained, thinly bedded quartzarenite; minor micaceous siltstone. Distinctive wavy bedding, small ripples, tool marks, mudclast casts, dessication cracks and convolute bedding. Minor tuff beds ?near base.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Strzeleckie Volcanics|25695|Mount Strzeleckie Volcanics|22448|||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Orosirian|1805|6|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1819|9|isotopic, Pb/Pb||||NT|Yes|42643|42643|Bagas L., Wyche S.|08-MAY-90|Kruse, P.D.|10-APR-90|Within the Hatches Creek Group (Lower Wauchope Subgroup). NOT a variation on Strzelecki units of Victoria.|Dacitic and rhyolitic ignimbrite (welded), lava and tuff; minor feldspathic/lithic/volcaniclastic/tuffaceous arenite and siltstone.|acid volcanic rock|sedimentary rock||N||17-JAN-23
Stuart Pass Dolerite|22910|Stuart Dyke Swarm|17445|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Stenian|1076|33|isotopic, Sm/Nd|intrusion|Stenian|1083|23|||||NT|Yes|43225|43503|Shaw R.D., Warren R.G., Teyssier C., Wakelin-King G.A.|07-MAY-92|||Defn card for Stuart Dolerite with State Convenor Oct 91. Name NOT available. Age: 1076+/-33Ma (Sm-Nd: Zhao and McCulloch 1993).  In the southern Arunta region.|Fine- to medium-grained dolerite, olivine dolerite, dykes; generally undeformed; most commonly has an intergranular to subophitic texture.|basic intrusive rock|||Y||17-JAN-23
Stubb Formation|17454|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tijunna Group|35323|||Cryogenian||||deposition|Statherian|1618|13|isotopic, U/Pb-Pb/Pb ion probe|||210|NT|No|28255|70968|||||Originally included in the Auvergne Group, also previously included in the 'Victoria River Group' of Traves (1955) and in the 'Coolibah Formation' of Laing and Allen (1956). Unconformably overlain by Jasper Gorge Sandstone in the Victoria Basin.|Lower part is grey shale and red-brown micaceous siltstone; a succession of interbedded micaceous claystone, siltstone, minor mudstone and sandstone.|siliciclastic sedimentary rock|||N||07-SEP-23
Sun Hill Arkose|17519|Sun Hill Arkose""|17518|||Yes|Formation, beds|Formal|Variation of published name|Defined|Keepera Group|9375|||Early Cambrian|||inferred, biostratigraphic correlation|deposition|Cryogenian|||inferred, geological correlation|||300|QLD|No|44543|44543|||||See also Geology of Queensland 2013, p94.|Arkose, feldspathic sandstone, micaceous sandstone, siltstone, arkosic conglomerates, green shale.|medium-coarse grained siliciclastic rock||continental rift|N||17-JAN-23
Sunbird Formation|74207|||||Yes|Formation, beds|Formal|Other new published name|Described|Weaber Group|19643|||Serpukhovian||||deposition|Visean|||||||WA|No|61542||||||Top unit of Weaber Group - forms part of revision by Gorter et al (2005) - detailed lithology included.|Massive limestone with minor sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Supplejack Dolostone Member|33808|Supplejack Dolomite Member|17541|||Yes|Member, phase|Formal|Resvd name published|Fully described|Skull Creek Formation|16978|||Mesoproterozoic||||deposition|Mesoproterozoic||||||50|NT|No|60006||Kruse P. , Beier P., Young D.|02-DEC-99|||Supersedes Supplejack Dolomite Member. Not related to Supplejack Downs Sandstone. Note: parent unit (Skull Creek Formation) said to be Calymmian, but reasons not clear. Birindudu Basin.|Stromatolitic, poorly bedded, microbial dolostone and dolarenite. Dolomitic sandstone.|carbonate sedimentary rock|||N||17-JAN-23
Supplejack Downs Sandstone|17542|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Birrindudu Group|1735|||Statherian||||deposition|Statherian|1800||||1300||NT|No|29809|45140|||||Not related to Mesoproterozoic Supplejack Dolostone Member, Skull Creek Formation, Bullita Group.|Sandstone: white to pale pink, sublithic arenite, quartz arenite, conglomerate, siltstone and shale, minor volcanogenic sandstone; fine to coarse grained, variably sorted.|siliciclastic sedimentary rock|||N||17-JAN-23
Supplejack Downs Sandstone, Pargee Sandstone|72686|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Statherian||||deposition|Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Sublithic arenite, tuffaceous sandstone and siltstone, acid lava; minor conglomerate, tuff, agglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Surprise Creek Formation|17551|Mammoth Formation|26718|||Yes|Formation, beds|Formal|Variation of published name|Defined|Mount Isa Group|12822|||Statherian|1743|26|isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1858|5|isotopic, U/Pb-Pb/Pb ion probe||200|2000|QLD|Yes|35286|46960|Derrick G.M., Wilson I.H., Sweet I.P.||Whitaker, W.|11-DEC-80|Previously mapped as 'Surprise Creek Beds' and 'Ploughed Mountain Beds'. Age: <1700Ma. Included by Cavaney (1975) in McNamara Group but not included by Hutton et al (1981) in their McNamara Group. Age 1688+/-5 Ma, of "shallow-level peperitic intrusives", from Geology of Queensland 2013, p56. See also misspelt Super Creek Formation and Supper Creek Formation.|Thick bedded, sublithic to quartz sandstone, quartzite, calcareous sandstone, siltstone, shale; basal conglomerate with clasts of quartz, quartzite and rhyolite in a matrix of medium to coarse grained sublithic sandstone. Ferruginous oolite marker beds.|siliciclastic sedimentary rock|||N||17-JAN-23
Swan Group|17573|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Valanginian|||||Callovian||||||||No|41733||||||Includes hydrocarbon source rocks.|||||N||17-JAN-23
Sweets Member|27664|||||Yes|Member, phase|Formal|Other new published name|Defined|Welltree Metamorphics|19716|||Orosirian|1785|101|isotopic, Rb/Sr|minimum depositional age|Paleoproterozoic|2500||inferred|||600|NT|Yes|39679||B.A.Pietsch|24-AUG-84|Brakel, A.|15-NOV-84|Age dating (by W.A.I.T. for NTGS) Rb/Sr 1785 +/- 101 m.y., Nd-Sm 2150 +/- 40 m.y.|Marble, in places graphitic; para-amphibolite; calc-silicate gneiss; quartz feldspar-biotite gneiss|metasedimentary carbonate rock|metasedimentary siliciclastic rock||N||17-JAN-23
Sweetwater Member|38412|Tomkinson Creek beds|18320|||Yes|Member, phase|Formal|Resvd name published|Defined|Baralandji Formation|38410|||Calymmian||||deposition|Calymmian|||||50|300|NT|No|24304|24303|||||Reserved as Sweetwater (Hussey, 1996).  Within the Renner Group. Previously mapped as undifferentiated Tomkinson Creek beds.|Upward coarsening, cream to tan, very thinly to thickly bedded, predominantly sandstone succession containing halite pseudomorphs and desiccated, interbedded mudstone intervals in the lower parts, and pebbly sandstone and conglomerate in uppermost part.|siliciclastic sedimentary rock|||N||17-JAN-23
Swift Formation|17583|Swift Beds|17581|||Yes|Formation, beds|Formal|Variation of published name|Defined|Cockroach Group|37963|||Middle Ordovician|||biozone|deposition|Lower Ordovician|||biozone|||20|QLD|No|44543|45052|||||Correlates with Digby Peaks Breccia. Different unit from Swift Monzogranite in WA. One reference to this unit suggests Neogene as minimum age. All the rest give Early Ordovician. Comment: As this unit is actually regolith preferentially developed over Ninmaroo Formation, it may be abandoned as a formal formation after futher work (Dunster et al, 2007).|Comprises chert with siltstone, sandstone, silicified coquinite, limestone and dolomite interbeds; highly fossiliferous.|non-carbonate chemical or biochemical sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Sybella Granite|17589|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||Sybella Suite|30647|Statherian|1655|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1670|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||1600|QLD|No|44290|44309|||||Mount Isa Province.  Ages: ca 1610+/-13Ma, 1544+/-12Ma and 1510+/-13Ma; also 1675-1655 Ma; ca 1670-1655 Ma. Intrudes the Haslingden Group. In Geology of Queensland 2013, p59.|Foliated coarse porphyritic biotite granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Sylvester Sandstone|17605|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Shadow Group|37961|||Early Cambrian||||deposition|Early Cambrian|||||||QLD|No|44543|44543|||||See also Lexicon.|Conglomerate, arenite, arkose, shale, mudstone, dolomite|siliciclastic sedimentary rock||continental rift|N||17-JAN-23
Tabletop Granite|27578|Cullen Granite|4989|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||Shoobridge Suite|31733|Paleoproterozoic|1820|||intrusion|Paleoproterozoic|1850|||||||No|39679||||||Previously mapped as part of Cullen Granite. Of Cullen Supersuite. Pine Creek Province. Intrudes Burrell Creek Formation.|Pink to rare green, coarse grained porphyritic hornblende-biotite granite, medium/coarse equigranular biotite granite, fine/medium equigranular leucogranite.|acid intrusive rock|||Y||17-JAN-23
Talbot South Monzogranite|42239|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|23809||||||Probably an informal name referring to the monzogranite in the Talbot South area.| Pink, medium- to coarse-grained equigranular biotite monzogranite that has been pervasively sericitized to depths of 100m.|acid intrusive rock|||Y||17-JAN-23
Talbot Well Formation|17668|Talbot Well Beds|25509|||Yes|Formation, beds|Formal|Other new published name|Defined|Birrindudu Group|1735|||Statherian|||inferred, overlying unit|deposition|Statherian|||inferred, underlying unit||300|500|NT|No|29804|45140|||||Latest age information (Crispe et al, 2007) suggests Birrindudu Group ranges from 1735 to 1640 Ma.  Talbot Well Formation is the middle unit of this group.|Stromatolitic chert, locally massive or brecciated and poorly bedded; sublithic sandstone, quartz sandstone, laminated siltstone, shale and minor limestone.|non-carbonate chemical or biochemical sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Talipata Granite|37706|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1683|||intrusion|Statherian|1683|2|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60674|67565|Scrimgeour, I.|12-NOV-02|Kruse, P.D.|05-OCT-04|Named after Talipata Gorge, NT. Located on the Mount Liebig 1:250 000 map sheet.  Warumpi Province. 2005 definition says unit is ungrouped.|Coarse-grained foliated porphyritic biotite and biotite-hornblende granite with flattened K-feldspar phenocrysts.|acid intrusive rock|||Y||17-JAN-23
Talyi-Talyi Charnockite|41852|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Waluwiya Suite|41856|Statherian|1631|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1631|4|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|67565|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|Has intrusive contacts with Tjungkubu Granodiorite.SHRIMP dating of metamorphic zircon rims suggests that metamorphism occurred within error of the age of crystallisation (Cross et al 2004).|Medium grained, weakly porphyritic, foliated charnockite, with blue-grey phenocrysts of plagioclase feldspar up to 8 mm in diameter, with metamorphic garnet and hornblende.|metamorphosed acid igneous rock|||Y||17-JAN-23
Tanami Group|17763|Tanami Complex|17761|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Orosirian|1821||inferred, intrusive relationship|deposition|Orosirian|1865||||||NT|Yes|45112||||||Age: ~1880-<1835Ma.  Intruded by Repulse Aplite, Water Tower Tonalite. See also UNIT DEFINITION (2007) for age details. The names Tanami Group and Tanami Complex appear to be used interchangeably in some references; however, Tanami Group has now superseded Tanami Complex. Group intruded by doleritic sills and deformed by the ~1830Ma Tanami Event. Stubbins Formation added to Tanami Group in 2015 (GSWA 1:100 000 maps, Kearney 4557 and Lewis 4657). Consitituents probably all defined in NT?|Schistose to phyllitic greywacke, arenite, siltstone, shale and conglomerate; chert, tuff, basalt, acid porphyry, quartzite, hornfels, arenite, amphibolite.|siliciclastic sedimentary rock|metasedimentary siliciclastic rock|continental backarc basin|N||17-JAN-23
Tanami Orogen - high-grade metamorphic rocks 80180|80180|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|High-grade metamorphic rocks.|high grade metamorphic rock|||U||17-JAN-23
Tanami Orogen - low to medium-grade metamorphic rocks 80183|80183|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Low to medium-grade metamorphic rocks.|low-intermediate grade metamorphic rock|high grade metamorphic rock||U||17-JAN-23
Tanami Orogen - moderately magnetic rocks 80179|80179|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||Y||17-JAN-23
Tanami Orogen - siliciclastic rocks 80181|80181|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Siliciclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Tanami Orogen - strongly magnetic rocks 80182|80182|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Tanami Orogen - weakly magnetic rocks 80299|80299|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Tanmurra Formation|17793|Medusa Beds|11605|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Weaber Group|19643|||Visean|||inferred, overlying unit|deposition|Visean|||inferred, underlying unit|||301|WA|No|48635|61542|||||Mory's original shelf carbonates unit (1991) is redefined with the upper 26m placed separately in the Sunbird Formation (Gorter et al 2005). See also Tanmurra Group. May be equivalent to Point Spring Sandstone and/or Burvill Formation.  Age: ~328-~322Ma.|Calcareous and dolomitic sandstone with minor limestone, siltstone and shale.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Tanumbirini Rhyolite|17800|Tanumbirini Volcanic Member|17802|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Tawallah Group|17902|Fagan Supersuite|31308|Statherian|1712|6|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1713|7|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||100|NT|No|42385||||||Most recent published age = 1713 +/- 7 Ma derived from page and Sweet (1998).  Older references also list age as 1725 +/- 40.|Massive, pink-brown weathered porphyritic rhyolite lava with phenocrysts of quartz and feldspar set in a spherulitic groundmass. Volcanic breccia.|acid volcanic rock|||N||17-JAN-23
Taragan Sandstone|24513|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1814|3|inferred, overlying unit|deposition|Orosirian|1837|7|inferred, underlying unit|||1200|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project. Formerly within the Hatches Creek Group. Of Ooradidgee Group since at least 2001. See also the misspelt Taragon Sandstone. Hosts the Wauchope field W vein deposit.|Feldspathic/sublithic arenite, quartz arenite, pebbly arenite, conglomerate; minor siltstone, mudstone and altered felsic lava|siliciclastic sedimentary rock|||N||17-JAN-23
Tarlton Bore Granite|80346|Tarlton Granite (NT)|80834|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1760||inferred, structural relationship|deformation|Statherian|1770||inferred, geological correlation|magmatic crystallisation|||NT|Yes|72515||Beyer, E. (NTGS)|29-NOV-17|Normington, V.|20-AUG-19|Scheduled to be published  in:Weisheit A, Reno BL and Beyer EE, (in review). Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. Previously included in the Jervois Granite [1986].|Leucogranite: medium- to coarse-grained, equigranular to porphyritic, minor biotite locally developed, rare secondary muscovite; strongly weathered to rottenstone,  extensively altered (kaolinised, silicified & hematitised); weakly to moderately foliated.|acid intrusive rock|||Y|I-type|17-JAN-23
Tarrara Formation|17868|||||Yes|Formation, beds|Formal|Other new published name|Defined|Carlton Group|3629|||Middle Cambrian||||deposition|Middle Cambrian||||||||No|45038|48886|||||Defined 1969. Defn on Tech File SD/52-14.|Siltstone; minor sandstone and limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Tatoola Sandstone|17896|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Umbolooga Subgroup|18813|||Statherian|||inferred|deposition|Statherian|1650|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||200|NT|No|44287|45162|||||Defn on Tech File E/53-3. Defined 1964. Originally the basal formation of Bauhinia Downs Subgroup (backreef seds. in McArthur Group). Redefined 1987 as part of Umbolooga Subgroup (McArthur Group). U/Pb SHRIMP age: 1648+/-3Ma. Dark siliceous bed near base. Possible tuffaceous interval. Pristine magmatic zircon population (Page et al. 2000). The 1650 Ma age is probably an earlier report of the same sample date. Maximum depositional age, from base of type section: 1671+/-13 Ma U-Pb SHRIMP (2019).|Flaggy, thin-bedded, fine-grained sandstone, shale and siltstone (locally dolomitic), very fine sandstone at base, several recessive dolomitic units; medium-grained, thinly to medium bedded sandstone with shale clasts and evaporite casts/moulds.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Tawallah Group|17902|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Statherian|1700||inferred|deposition|Statherian|1790||inferred|||6000|NT|No|44306|45162|||||Basal age is poorly constrained from age of unconformably underlying Scrutton Volcanics (McArthur Basin tectonostrat map, Rawlings, 2001). Seems to be divided into upper and lower parts in Geology of Queensland 2013, p56, 58. Includes Wire Creek Sandstone, with  a maximum depositional age of 1847+/-13 Ma. Only other age given is maximum depositional age of 1843+/-4 Ma for Westmoreland Conglomerate.|Conglomerate, sandstone, greywacke, dolostone; basalt, dolerite, rhyolite, rhyodacite, dacite, trachyte, microgranite.|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Tawallah Group - siliciclastic rocks 79920|79920|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|Tawallah Group|17902|||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Siliciclastic rocks.|siliciclastic sedimentary rock|||U||17-JAN-23
Tawallah Group, Lower|38787|Tawallah Group|17902|||Yes|Subgroup|Informal|Variation of published name|Briefly described|Tawallah Group|17902|||Statherian||||deposition|Statherian||||||||No|23910||||||Informal grouping of the lower units of the Tawallah Group. Includes units from Yiyinti Sandstone to McDermott Formation (5 units) on the 1:1 million surface geology of Australia map.|Yiyintyi Sandstone to McDermott Formation: Quartzose sandstone; subordinate conglomerate, ferruginous sandstone, dolostone, mudstone|siliciclastic sedimentary rock|||N||17-JAN-23
Tawallah Group, Upper|40834|||||Yes|Subgroup|Informal|Variation of published name|Briefly described|Tawallah Group|17902|||Statherian||||deposition|Statherian||||||1800||No|23968||||||Informal grouping of the upper units of the Tawallah Group.  Includes units from Wununmantyala Sandstone to Echo Sandstone  (10 units) on the 1:1 million surface geology of Northern Territory map. grouping of units may be different in other publications.|Wununmantyala Sandstone to Echo Sandstone: Quartzose and lithic sandstone, mudstone, evaporitic-stromatolitic dolostone, carbonaceous shale|siliciclastic sedimentary rock|||N||17-JAN-23
Teapot Granite Complex|29770|Teapot granite|24019|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Mesoproterozoic|1136|6|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Mesoproterozoic|1137|9|||||NT|Yes|43225|43503|Shaw R.D. (modified from Glikson, 1987)|11-OCT-95|||Hermannsburg 1:250 000 sheet area. Variation on published name Teapot Granite. With Iwupataka Metamorphic Complex, provided source rocks for Brewer Conglomerate. Has potential for low grade, high tonnage U deposits.|Porphyritic granitoid, leucogranite, migmatite, migmatitic quartzofeldspathic gneiss|acid intrusive rock|||Y||17-JAN-23
Teena Dolostone|76084|Teena Dolomite|26166|||Yes|Formation, beds|Formal|Variation of published name|Described|Umbolooga Subgroup|18813|||Statherian||||eruption|Statherian||||deposition||130|NT|No|63112||||||Stratigraphic Nomenclature rules allow change from Dolomite to Dolostone without being formally redefined (T. Munson, NT Convenor, 26-AUG-2011). Age: See Coxco Dolomite Member. Material dated was interpreted as airfall tuff (RefID 23398, 2000). See Teena Dolomite in Jackson et al. 1987 p93-97 for type section in formation.|Thinly bedded to laminated dololutite, silicified in places; dolomitic shale, sandstone; intraclast breccia, conglomerate and dolarenite.|carbonate sedimentary rock|||N||17-JAN-23
Tempe Formation|17941|Tempe Member|32916|||Yes|Formation, beds|Formal|Other new published name|Defined|Pertaoorrta Group|15091|||Middle Cambrian|||biozone|deposition|Early Cambrian|518|8|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||350||No|48863|48863|||||Shallow water shelf succession dominated by a persistent sandstone sheet overlain by siltstone and shale, capped by dolomite (RefID: 65233).|Mainly shale and siltstone over a persistent basal sandstone sheet, with lesser dolostone, sandy dolostone, calcareous sandstone and locally glauconitic sandstone or dolostone. Upper part contains brachiopods, trilobites, hyoliths and gastropods.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Temple Bar Sandstone Member|17944|||||Yes|Member, phase|Formal|Other new published name|Defined|Heavitree Formation|8223|||Neoproterozoic||||deposition|Neoproterozoic||||||112|NT|Yes|35102|48992|Clarke D.B., Shaw R.D.|01-JAN-70|Branch, C.T.|01-DEC-79||Very fine to fine-grained quartz sandstone, characteristically containing a trace of weathered feldspar. The lower beds are generally medium to thick bedded and the upper beds are thin to medium bedded.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Ten Mile Creek Member|84110|Top Lily Sandstone Member|68748|||Yes|Member, phase|Formal|Other new published name|Fully described|||||Calymmian|||||Statherian|1641|14||||750|NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|This unit crops out north of the Mitchiebo-Maloney fault. Geochronology has shown that these rocks, previously included in the Top Lily Sandstone Member of the Playford Formation, are actually likely to be considerably older than the rest of this unit, so need to be separated into a new unit.|White to pink/dark pink-red, thickly to very thickly bedded, very fine- to fine-grained, well-sorted lithic sandstone; scattered granules and pebbles, trough cross-bedded on large scale, current ripples and primary current lineations common.||||N||07-OCT-23
Tennant Creek Granite|17951|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||Tennant Creek Supersuite|39127|Orosirian|1848|7|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1851|3.5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|48860|60684|||||Previously referred to as Tennant Creek granite complex and Red Bluff granite. Intrudes Warramunga Formation and Flynn Subgroup.|Biotite-bearing granite; seriate porphyritic to equigranular; rapakivi texture; blue ovoid quartz; locally abundant enclaves, minor xenoliths; foliated, sheared in part, and locally gneissic.|acid intrusive rock|||Y|I-type|27-APR-23
Tennant Creek Supersuite|39127|||||Yes|Supergroup|Formal|Variation of published name|Described|||||Orosirian|1845||inferred|intrusion|Orosirian|1851||inferred|||||No|50588||||||Ages of granites range from 1872 to 1837Ma (Geoscience Australia Record 2001/12, p22), but the age of emplacement of the Supersuite is considered to be  1855-1845 Ma (Donnellan, 2013). See also Tennant Supersuite - probably a misspelling of Tenant Creek Supersuite.|Granite: biotite and biotite-muscovite bearing; porphyritic; xenolithic; leucogranite.|acid intrusive rock|||Y||10-AUG-23
Tennysons Leucogranite|27058|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Tennysons Suite|31732|Orosirian|1820|||intrusion|Orosirian|1850||||||NT|No|39679||Needham, R.S.|13-JUL-83|||Pine Creek Province. See also occasionally used Tennysons Granite. Intrudes Finniss River Group|Coarse porphyritic muscovite-biotite leucogranite. Greisenised.|acid intrusive rock|||Y||17-JAN-23
Tennysons Suite|31732|Tennysons suite|31713|||Yes|Group, Suite|Informal|STRATLEX Entry|Briefly described|||Cullen Supersuite|30778|Paleoproterozoic|||||Paleoproterozoic|||||||NT|No|50586||||||Geochemical suite nomenclature, using Tennysons Leucogranite as the type.  Described as comprising the Tennysons and Umbrawarra Leucogranites, and the Wolfram Hill and Fenton Granites (pp56, 61-62).|Leucogranite-dominated plutons.|acid intrusive rock|||Y||17-JAN-23
Teppa Hill Metamorphics|17968|Teppa Hill metamorphics|24516|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Hayes Metamorphic Complex|27290|||Paleoproterozoic|||||Paleoproterozoic||||||||No|39887|||||||Muscovite-biotite quartz-rich metasediment, quartzite; minor biotite schist, amphibolite, calc-silicate rock, schistose biotite augen gneiss|metasedimentary siliciclastic rock|||N||17-JAN-23
Term Supersequence|40574|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Statherian|1620||||Statherian|1630|||||2500||No|70897||||||Shows rapid thickness and lithofacies variations across regional fault systems. Includes basal part of Lawn Hill Formation and Termite Range Formation.|White and grey thick-bedded sandstone and lithic sandstone interbedded with siltstone.|sedimentary rock|||N||17-JAN-23
Termite Range Formation|17975|Termite Range Quartzite|17976|||Yes|Formation, beds|Formal|Resvd name published|Defined|McNamara Group|11575|||Statherian|1611|4|inferred, overlying unit|deposition|Statherian|1630|5|isotopic, U/Pb-Pb/Pb ion probe|||1300|QLD|Yes|44922|37459|R.J.Cavaney|24-SEP-76|Whitaker, W.|24-JUL-81|Previously reserved as Termite Range Quartzite. Previously included in the Ploughed Mountain Beds by Carter and others (1961). Cavaney (1975) originally named this unit the "Gregory Quartzite" but name invalid due to previous usage. Part of the Term Supersequence.|Massive, medium to coarse lithic and clayey sandstone, massive greywacke interbedded with shale and siltstone;  dark grey flaggy siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
The Granites Granite|18039|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Grimwade Suite|40137|Statherian|1780|24|isotopic, Rb/Sr|intrusion|Statherian|1795|6|isotopic, Rb/Sr||||NT|Yes|29812|45140|Blake D.H.|08-NOV-74|Strusz, D.L.|12-FEB-75|Age: a range given in references. Also referred to as Granites Granite. Previously of The Granites Supersuite, The Granites Suite. Now (2013) included in Grimwade Suite? [see NTGS Special Publication 5, p11:12]|Pink and grey porphyritic and non porphyritic biotite adamellite; minor pegmatite and aplite; locally foliated.|acid intrusive rock|||Y||17-JAN-23
Thorntonia Limestone|18088|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Narpa Group|37962|||Miaolingian|||biozone|deposition|Cambrian Series 2|||biozone|||900|QLD|No|44273|44309|||||See also Lexicon. SE54-9,13. Lower part formerly the Marqua beds, and then became the Hay River Formation. Annular outcrop with ~18km diameter - the Lawn Hill impact structure coincides with its outer margin.  Age is Ordian [Cambrian Series 2, Stage 4 from 2013 reference]. Unconformably overlain by Arthur Creek Formation. Contains potentially prolific marine source rocks.|Dolostone, dolomitic limestone, convoluted and nodular chert; medial pyritic-carbonaceous black shale interbeds; basal terrigenous sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock|continental rift|N||17-JAN-23
Thring Granite|80338|Mascotte Gneiss Complex|26019|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Fosters Suite|80343|Statherian|||inferred||Statherian|1780||inferred, geochemical correlation|magmatic crystallisation|||NT|Yes|71621||Beyer, E. (NTGS)|29-NOV-17|Williams, B.|15-NOV-18|Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin. Interpreted to be synchronous with intrusion of 1780 ± 4 Ma Jericho Granite (LA-ICP-MS 207Pb/206Pb, Beyer et al in prep).|Leucogranite: medium to coarse grained, equigranular, minor biotite, secondary muscovite common, locally tourmaline-bearing; strongly weathered to rottenstone and altered (silicified); weakly to moderately foliated.|acid intrusive rock|||Y|I-type|17-JAN-23
Ti-Tree Granophyre|18111|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Orosirian|1820|||intrusion|Orosirian|1850||||||NT|No|32310|48942|||||See also Ti Tree Granophyre. Intrudes Berinka Volcanics, Chilling Sandstone, Moyle River Formation.|Granophyre, contaminated, chloritised, sericitised, saussuritised, argillised; felsite; microgranite, porphyritic, altered|acid intrusive rock|||Y||17-JAN-23
Tickalara Metamorphics|18130|Halls Creek Metamorphics|7991|||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Orosirian|1852|2|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Orosirian|1865|||||||No|44317||||||Metamorphosed equivalent of Halls Creek Group. c. 1865 Ma. Occurs in the central zone of Lamboo Complex. Age: c.1865Ma. Age updated by I. Sweet. Intruded by Sally Malay mafic-ultramafic intrusion. In the Central Zone of the Lamboo Complex. Hosts Bow River nickel deposit.|Hornfels, amphibolite, mafic granulite, calc-silicate rock and marble, minor banded iron formation, quartzite, migmatitic pelitic gneiss intruded by mafic to intermediate dykes.|metamorphic rock|||N||17-JAN-23
Tijunna Group|35323|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Ectasian|1350||||Calymmian|1430|||||300|NT|No|60682|24122|Beier P.|08-MAR-00|||Victoria River Basin. ?Delamere 1:250 000 sheet area. Age: 1.43-1.35Ga [on what basis?].  See also Tijunna group. Birrindudu Basin.|Alternating cross-bedded quartz sandstone- and mudrock-dominated units, deposited in marine shelf to shoreface settings|siliciclastic sedimentary rock|||N||17-JAN-23
Tilmouth beds|70607|Tilmouth Clay|35248|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Holocene|||||Upper Pleistocene||||||||No|61828||||||Reserved as Tilmouth Clay by P. English (2000).|Distinctive lacustrine facies - olive-grey clay with gypsum laminae.|sediment|||N||17-JAN-23
Timber Creek Formation|18163|Wave Hill Beds""|69202|||Yes|Formation, beds|Formal|Variation of published name|Defined|Bullita Group|2914|||Calymmian||||deposition|Calymmian||||||306|NT|No|32699|48943|||||Supersedes "Wave Hill Beds". Basis of Calymmian age unknown [CEB Sep-2011]. Birindudu Basin.|Silty dolostone, dolomitic siltstone, sandstone, minor dolarenite, dolomitic sandstone, dolostone and chert.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Timber Creek kimberlites|36758|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Jurassic|||||Lower Jurassic||||intrusion||3500||No|23772||||||For use in Alkaline Rocks data compilation. Informal/invalid. Intrudes Timber Creek Formation. Age: 179+/-2Ma (Belousova et al, 2001) - is much younger than ages assigned to surrounding rocks. Comprise five known bodies in the Victoria River Basin, Northern Territory (Berryman et al. 1999). Petrological and mineralogical studies by Berryman et al. (1999) indicate the rocks are Group 1 hypabyssal macrocrystic kimberlites that can be classified as phlogopite-monticellite or phlogopite kimberlites. Three of the bodies are diamond bearing (Berryman et al. 1999).|Phlogopite-monticellite or phlogopite kimberlites.|exotic composition igneous rock|||Y||17-JAN-23
Tin Camp Granite|18189|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Jim Jim Suite|30779|Orosirian|1844|9|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Orosirian|1846|13|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|36085||Needham, R.S.|21-MAR-74|Strusz, D.L.|16-SEP-74|Pine Creek Province. Previously of the Jim Jim Suite. Redefined as of David Suite in 2005, but it appears that unit returned to Jim Jim Suite in 2012. Intrudes Nimbuwah Complex and Cahill Formation.|Altered pale pink to cream biotite granite: anomalously radioactive, commonly with north-trending quartz-filled shears; anatectic granite; locally coarse-grained and perthitic.|acid intrusive rock|||Y|A-type|17-JAN-23
Tin Pot Suite|40053|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Mesoproterozoic|1140||||Mesoproterozoic|1140|||||||No|24047||||||Not related to Tin Pot Ignimbrite (of the Devonian Snowy River Volcanics) of Victoria?  Age: 1140Ma.|||||Y||17-JAN-23
Tindall Limestone|24525|||||Yes|Formation, beds|Formal|Variation of published name|Redefined|Daly River Group|5163|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||204|NT|Yes|46676|42012|Kruse P.D.|21-APR-88||07-APR-88|Correlated with Headleys Limestone. Originally defined Randal (1962). Redefined Kruse 1988. Lateral correlative of Montejinni Limestone.|Partially dolomitised limestone with silt laminations, interbedded calcilutite and marl; bioclastic limestone, mudstone, siltstone; minor stromatolitic boundstone, cryptalgal laminate; local bioclastic calcarenite, arkosic sandstone, conglomerate|carbonate sedimentary rock|||N||17-JAN-23
Tinfish Sandstone|24526|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Statherian||||deposition|Orosirian|||||||NT|Yes|42643|42643|Bagas, L.|31-AUG-88|Kruse, P.D.|10-APR-90|Within the Hatches Creek Group (Lower Wauchope Subgroup).|Feldspathic/micaceous/lithic arenite, quartz arenite, feldspathic quartz-biotite schist.|medium-coarse grained siliciclastic rock|metasedimentary siliciclastic rock||N||17-JAN-23
Tinki Granite|42374|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Statherian|1690|||magmatic crystallisation|Statherian|1691|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15). Age: 1690Ma.|Undeformed biotite granite and quartz monzonite, typically coarse-grained, equigranular to porphyritic (K-feldspar phenocrysts to 4cm); mafic xenoliths common; intruded by fine-grained to microcrystalline felsic dykes.|acid intrusive rock|||Y||17-JAN-23
Tjauwata Group|36772|||||Yes|Group, Suite|Formal|Resvd name published|Defined|Bentley Supergroup|1491|||Stenian|1040||||Stenian|1090|||||1000|NT|Yes|24497|65256|Close, D.F. and Edgoose, C.J.|20-NOV-01|Kruse, P.D.|21-JAN-02|Bentley Basin. There are extensive exposures between Petermann and Bloods Ranges. Disconformably overlain by Neoproterozoic basal sediments of the Amadeus Basin (Dean Quartzite etc.).|Deformed sediments and bimodal volcanics which include: mafic and felsic volcanics; felsic tuffs; interlayered mafic volcanics; felsic volcanics; volcaniclastic sediments and quartzite; conglom. and sst; siltstone; hematitic quartzite.|igneous volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Tjungkubu Granodiorite|41853|||||Yes|Formation, beds|Reserved|Reserved|Defined|||Waluwiya Suite|41856|Paleoproterozoic|||inferred, geochemical correlation|intrusion|Paleoproterozoic|||inferred, geochemical correlation||||NT|Yes|||I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|Published as Tjunkuba Granodiorite, but place name is Tjunkubu Hills, so this spelling preferred. Age: late Palaeoproterozoic. Geochemically related to Talyi-Talyi Charnockite, which has a SHRIMP U-Pb zircon age of 1631 +/- 4 Ma (Cross et al 2003).|Foliated, equigranular to weakly porphyritic, variably migmatitic biotite-hornblende granodiorite.|acid intrusive rock|||Y||17-JAN-23
Tjuninanta Formation|36773|Tjuntinanta Sandstone|33809|||Yes|Formation, beds|Formal|Resvd name published|Defined|Tjauwata Group|36772|||Stenian|||inferred, geological correlation|eruption|Stenian|||inferred, geological correlation||||NT|Yes|50321|65256|Edgoose, C.J. and Close, D.F.|23-NOV-99|Kruse, P.D.|21-JAN-02|Hull, Bloods Range 1:100 000 sheet areas.|Intercalated, silicified, epidotised amygdaloidal basalt; quartzite, quartz-muscovite schist and dark grey phyllitic schist; volcaniclastics.|basic volcanic rock|metamorphosed acid igneous rock||N||17-JAN-23
Tjuninanta Formation - basalt|72687|||||Yes|Member, phase|Informal|Variation of published name|Described|Tjuninanta Formation|36773|||Stenian||||eruption|Stenian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Intercalated, silicified, epidotised amygdaloidal basalt|basic volcanic rock|||N||17-JAN-23
Tjuninanta Formation - quartzite|72688|||||Yes|Member, phase|Informal|Variation of published name|Described|Tjuninanta Formation|36773|||Stenian|||||Stenian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Quartzite, quartz-muscovite schist and dark grey phyllitic schist|metasedimentary siliciclastic rock|||N||17-JAN-23
Tjuninanta Formation - volcaniclastics|72689|||||Yes|Member, phase|Informal|Variation of published name|Described|Tjuninanta Formation|36773|||Stenian||||eruption|Stenian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Volcaniclastics|metamorphosed acid igneous rock|||N||17-JAN-23
Tobacco Member|37740|||||Yes|Member, phase|Formal|Resvd name published|Defined|Crow Formation|37729|||Calymmian|1400||inferred, geological correlation|deposition|Calymmian|1591|7|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|24442|65337|Rawlings, D.|22-NOV-02|||To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area.  Age: inferred from correlation of Nicholson Group with Roper Group.|White, silicified, fine to very coarse grained to pebbly, quartzose to lithic sandstone and local pebble to cobble conglomerate; minor glauconitic sandstone, interbedded shale and siltstone.|siliciclastic sedimentary rock|||N||03-OCT-23
Todd River Dolostone|69015|Todd River Dolomite|18256|||Yes|Formation, beds|Formal|Variation of published name|Described|Pertaoorrta Group|15091|||Middle Cambrian|517||inferred, biostratigraphic correlation|deposition|Early Cambrian|521||inferred, biostratigraphic correlation|||||No|64797||||||See also Todd River Formation.|A succcession of thickly bedded, archaeocyathan-rich dolostone, and overlying thinly bedded sandstone, siltstone, mudstone and dolostone. Contains archaeocyathids, small shelly fossils, inarticulate brachiopods, molluscs, hyoliths and problematica.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Toko Group|18263|Toko Beds|18262|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Upper Ordovician||||deposition|Lower Ordovician|||||||QLD|Yes|44543|64068|Draper J.J.||Whitaker, W.|30-OCT-79|Toko Beds redefined as Toko Group. See also Lexicon. See definition card[?]. SF54-9,13.  Redefined by P.D. Kruse 31-Jan-2003 (see new definition card entries): proposed by Casey in Smith (1963a). Originated as Toko Series (Whitehouse 1936). Usage is different in Queensland, where clastic units form the group and the dominantly carbonate Coolibah Formation and Kelly Creek Formation are placed in the Cockroach Group instead (Geology of Queensland 2013, p94-95).|Sandstone, limestone, dolostone|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Tollis Formation|27070|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Finniss River Group|6669|Gerowie Suite|31730|Orosirian|1862|3|inferred, underlying unit|deposition|Orosirian|1868|5|isotopic, U/Pb-Pb/Pb ion probe|||2200|NT|Yes|39679||Needham, R.S.|27-AUG-82|Brakel, A.|25-OCT-83|Age: SHRIMP U-Pb 1890 +/- 18-15 Ma (in 1988) - ?inherited component, thus ~ 1870 Ma. But age presented as 1800-1730Ma in DEFINITION. Formerly of the El Sherana Group, now of the Finniss River Group. Hosts gold and Sn deposits.|Poorly sorted fine to coarse volcaniclastic metagreywacke; laminated slate and mudstone; minor phyllite, pale green cherty argillite and laminated black crystal tuff, volcanolithic pebble conglomerate, crystal tuff.|metasedimentary siliciclastic rock|||N||17-JAN-23
Tolmer Group|18275|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Mesoproterozoic|1200||||Paleoproterozoic|1837|15|isotopic, U/Pb-Pb/Pb ion probe|||1800||No|44315|44314|||||Defined 1962. See also Lexicon. Wingate Mtns 1:100 000 sheet. Correlated with Birrindudu Group. Minimum age: 1200 Ma; maximum age 1780+/-80 Ma., but includes Depot Creek Sandstone, max age 1825 Ma.|Sandstone, dolomite, siltstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Tomahawk Formation|39871|Tomahawk Beds|18304|||Yes|Formation, beds|Formal|Variation of published name|Defined|Cockroach Group|37963|||Tremadocian|||biozone|deposition|Furongian|||biozone||70|225|NT|No|44469|60122|||||Tomahawk beds superseded again, and returned to Tomahawk Formation as current name - see TOBERMOREY 1:250 OOO Sheet SE 53-12, 2003. Includes lower part of Dulcie Sandstone (Joklik 1955) and a major portion of former Tomahawk Beds (Smith 1964).|Quartzose and glauconitic sandstone, minor dolostone, limestone, dolomitic quartz sandstone and conglomerate; interbedded limestone or dolostone and marl at top|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||12-JUL-23
Tomkinson Creek Group|18318|Tomkinson Creek Subgroup|18319|||Yes|Group, Suite|Formal|Other new published name|Redefined|||||Statherian|1710|||deposition|Orosirian|1805|||||||No|32959|24303||||||A thick succession of shallow-marine and continental sedimentary rocks, with minor mafic volcanic rocks in the lower part.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Tomkinson Province - moderately magnetic rocks 79990|79990|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||N||17-JAN-23
Tomkinson Province - moderately magnetic rocks 80403|80403|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||N||17-JAN-23
Tomkinson Province - sediments and volcanics 79880|79880|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments and volcanic rocks.|sedimentary rock|igneous volcanic rock||N||17-JAN-23
Tomkinson Province - strongly magnetic rocks 79878|79878|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|unknown.||||U||17-JAN-23
Tomkinson Province - strongly magnetic rocks 79991|79991|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Mesoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Tomkinson Province - strongly magnetic rocks 80184|80184|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Tomkinson Province - weakly magnetic rocks 79882|79882|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Tomkinson Province - weakly magnetic rocks 80404|80404|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||N||17-JAN-23
Tommys Gap Metamorphics|38005|Tommys Gap metamorphics|24529|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|46730||||||See Tommys Gap metamorphics for definition.|Hornblende gneiss, amphibolite, feldspar-quartz metasediment, basic metavolcanics, marble, quartzite calc-silicate rock, chlorite schist|high grade metamorphic rock|||N||17-JAN-23
Tooganinie Formation|18349|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Umbolooga Subgroup|18813|||Statherian|1639|6|inferred, overlying unit|deposition|Statherian|1648|3|inferred, underlying unit|deposition|200|500|NT|No|44287|45162|||||Defn on Tech File E/53-3. Defined 1964 - upper formation of Bauhinia Downs Subgroup (backreef seds of McArthur Group). Redefined 1987.|Dololutite, stromatolitic dololutite, dolomitic shale and siltstone, ripple-marked and cross-bedded dolarenite and sandstone; breccia beds and ooids in dolarenite; common dessication cracks and pseudomorphs after gypsum and halite.|carbonate sedimentary rock|||N||17-JAN-23
Toolebuc Formation|18375|Toolebuc Limestone|18382|||Yes|Formation, beds|Formal|Variation of published name|Defined|Wilgunya Subgroup|20031|||Cenomanian|98|||deposition|Albian|101|||||65|QLD|Yes|44291|63979|Senior B.R., Exon N.F., Burger D.||Staines, H.R.E.|04-JUN-75|Previously included in the Marree Subgroup, Neales River Group (see Strzelecki 1:250k map (1994) and explan notes (1995)) in South Australia.  Age: ~101-~98Ma.|Laminated calcareous and kerogenous mudstone, minor coquinite and limestone, labile sandstone and oil shale.|carbonate sedimentary rock|fine grained siliciclastic rock|intracratonic|N||17-JAN-23
Top Lily Sandstone Member|68748|Top Lily Member|38511|||Yes|Member, phase|Formal|Variation of reserved name|Defined|Playford Sandstone|37727|||Calymmian|1546|26|isotopic, U/Pb-Pb/Pb ion probe|deposition|Calymmian|1641|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||143|NT|Yes|62659|65337|Rawlings, D.|19-JUN-03|Kruse, P.D.|11-APR-05|Reserved as Top Lily Member by Rawlings, D. on 19-JUN-2003. Definition by Rawlings, D. Not related to Lily Creek Member (QLD). Now(2023) excludes outcrop north of the Mitchiebo-Maloney fault, which forms the Ten Mile Creek Member of the Fish Hole Formation.|White, pink, thickly to very thickly bedded, very fine- to fine-grained, well-sorted lithic sandstone; minor, more thinly bedded, ferruginous very fine-grained sandstone and siltstone, and hematitic siltstone to ironstone.|siliciclastic sedimentary rock|||N||06-OCT-23
Top Rocky Rhyolite|18425|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|Carrara Range Group|3679|||Statherian|1725|3|isotopic, U/Pb|eruption|Statherian|1725|3|||100|400|NT|Yes|38237|49018|I.P.Sweet|26-MAY-80|Munson, T. (NTGS) after Brakel, A.T. (12-Mar-1982)|01-JUN-23|Previously reserved as Top Rocky. No correspondance, info received from comments on VL40.|Lower part: pink, quartz and K-feldspar porphyritic, massive to flow banded, spherulitic to microgranophyric rhyolite; local autobreccia, peperite and hyaloclastite. Upper part: poorly-sorted matrix-supported pebble to boulder conglomerate.|acid volcanic rock|||N||10-OCT-23
Top Springs Limestone|18426|||||Yes|Formation, beds|Formal|Other new published name|Defined|Barkly Group|32954|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone|||92|NT|Yes|44287|42639|Kruse P.D., after Plumb and Rhodes 1963, 1964|||10-APR-90|Defn on Tech File E/53-8. Age is Ordian (early Middle Cambrian) based on trilobite Redlichia.|Grey, partially dolomitised mottled, bioclastic, peloid and oncoid limestone; minor grey brecciated limestone, pink to pale brown cryptalgal laminite; rare grey fenestral limestone|carbonate sedimentary rock|||N||17-JAN-23
Tops Member|26328|||||Yes|Member, phase|Formal|Resvd name published|Defined|Central Mount Stuart Formation|3865|||Ediacaran|||biozone|deposition|Ediacaran|||biozone||114|580|NT|Yes|42504|42643|Haines P.W.|25-JUL-88|Kruse, P.D.|10-APR-90|Age is Ediacaran (Late Adelaidean). Not to be confused with the Carboniferous Tops Rhyolite Member of NSW.|Arkose, feldspathic quartz arenite: lithic, cross-bedded; siltstone interbeds; minor conglomerate and dolostone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Torpedo Creek Quartzite|18438|||||Yes|Formation, beds|Formal|Resvd name published|Defined|McNamara Group|11575|||Statherian||||deposition|Statherian|1697|12|isotopic, U/Pb-Pb/Pb ion probe|||300|QLD|Yes|30535|37459|Hutton L.J., Cavaney R.J., Sweet I.P.||Whitaker, W.|24-JUL-81|Previously included in Mammoth Formation. Correlated with Surprise Creek Formation. In 2006, shown along with Gunpowder Creek Fm and Warrina Park Quartzite as separate lower and upper parts, in Prize and Gun Supersequences respectively.|Generally a medium-grained white orthoquartzite; locally contains a basal conglomerate which can be poorly sorted, cobble to boulder, polymictic conglomerate to conglomeratic sandstone.Pseudomorphs after gypsum occur locally in the orthoquartzite.|siliciclastic sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Train Range Ironstone Member|18529|Train Range Ironstone Formation|18528|||Yes|Member, phase|Formal|Variation of published name|Described|Mullera Formation|13391|||Calymmian||||deposition|Calymmian|||||45|180||No|44922||||||Within the South Nicholson Group. This unit was correlated with the Sherwin Ironstone Member of the Roper Group in 1999. Unclear if the correlation is still accepted with what is now the Sherwin Formation [CEB Nov2017]. See also Train Range Iron-bearing Member.|Contains three or four ore-grade beds; mineralisation consists of oolitic hematite, siderite and chamosite beds: "Wabana type". Lenticular ironstone beds and thinly bedded alternating dark grey shales, siltstones and sandstones.|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Treasure Suite|30738|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Orosirian|1810||||Orosirian|1829|||||||No|50588||||||Tennant Creek /Davenport Province. Includes Treasure Volcanics. An example of the Cullen Association.|I-(granodiorite) type. Mainly composed of volcanics and shallow level intrusive granophyres and porphyries. Includes K-feldspar megacrystic biotite granite and minor granitic gneiss.|acid intrusive rock|||Y|I-type|17-JAN-23
Treasure Volcanics|24535|Treasure volcanics|18565|||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|Treasure Suite|30738|Orosirian|1814|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Orosirian|1815|3|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||3500|NT|Yes|39624|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project. Previously considered within the Hatches Creek Group. Tennant Creek/ Davenport Province. Hosts the Hatches Creek field W-Cu vein deposit.|Rhyolitic to dacitic lava and pyroclastic rocks including ignimbrite; felsic intrusives; feldspathic/lithic (including volcaniclastic) arenite, quartz arenite; minor basaltic lava.|acid volcanic rock|||N||17-JAN-23
Trephina granitic gneiss|24536|||||Yes|Formation, beds|Informal|Resvd name published|Defined|||Jennings Suite|30859|Statherian|||||Statherian|||||||NT|Yes|48992||R.D.Shaw|05-MAR-75|Branch, C., Brown, M.|01-MAR-79||Biotite granitic gneiss.|metamorphosed acid igneous rock|||Y||17-JAN-23
Treuer Member|18576|||||Yes|Member, phase|Formal|Other new published name|Defined|Vaughan Springs Quartzite|19064|||Cryogenian||||deposition|Cryogenian|||||700|1825|NT|No|30258|45155|||||Min.age said to be 1280m.y. from glauconite dating (Cooper 1971), but may be as young as 850 Ma from correlated units.|Thinly bedded mudstone, shale, quartz sandstone, minor glauconitic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Triassic sedimentary rocks 76703|76703|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Triassic|205|||deposition|Lower Triassic|251|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset, and 'Pre-Cz geology, NSW & Vic'.|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Troughton Group|18608|Troughton Formation|23051|||Yes|Group, Suite|Formal|Resvd name published|Fully described|||||Callovian|||biozone|deposition|Anisian|||inferred, biostratigraphic correlation|||||No|41459||||||Reserved as Troughton Formation. Age: ~240-~154Ma.|Dominantly siliciclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Tug Sandstone Member|23055|Arltunga Member|69597|||Yes|Member, phase|Formal|Resvd name published|Briefly described|Hale Formation|25689|||Late Eocene||||deposition|Late Eocene||||||||No|43748||Senior B.|22-DEC-94|||Top of Hale Formation, Hale Basin.|Poorly consolidated, fine-grained, brown silty sandstone, with minor sandy siltstone and claystone interbeds.|siliciclastic sedimentary rock|||N||17-JAN-23
Turnstone Formation|18718|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Bathurst Island Group|1249|||Maastrichtian||||deposition|Campanian|77||||||NT|No|41532|42442|A.J.Mory|17-JUL-87|||Age: ~77-~65Ma [in 2001].|Calcareous claystones and calciluties.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Twin Bonanza Porphyry|42248|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||The Granites Suite|42093|Statherian|1795|||eruption|Orosirian|1802|8|isotopic, U/Pb-Pb/Pb ion probe|||||No|23809||||||Appears to have started as an informal name referring to porphyritic rocks of the Twin Bonanza prospect.  See also the informal Twin Bonanza porphyry and misspelt Twin Bonazer Posphyry.  Probably part of The Granites Suite. Name likely to be formalised as usage increases?|Coarse-grained, equigranular biotite monzogranite with large, euhedral perthitic alkali feldspar megacrysts; some gold mineralisation|acid intrusive rock|||N||17-JAN-23
Two Sisters Granite|24544|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Allia Creek Suite|39136|Orosirian|1768|16|isotopic, Rb/Sr|intrusion|Orosirian|1862|6|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|23822|41305|D.A.Berkman|21-MAY-79|Kruse, P.D.|08-APR-88|Pine Creek Province. Supersedes: Turnball Bay Granite, Roberts Creek Granite. Intrudes the Burrell Creek Formation and Welltree Metamorphics. Age details in UNIT DEFINITION. Unconformably overlain by Tolmer Group and ?Tindall Limestone.|Grey to pink, medium to coarsely crystalline, weakly to strongly foliated, commonly garnetiferous granite, quartz monzonite and granodiorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Tyson Creek Metamorphics|76123|Tyson Creek granulite|24545|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Statherian|1767|17|||Statherian||||||||No|65338||||||Probably intended to replace Tyson Creek granulite, but no discussion of name change. Has a granulite-grade foliation which is cross-cut by Possum Creek Charnockite. In Napperby 1:250 000 sheet area. Not clear if age: 1767 +/- 17 Ma (Hand et al. 1995) is of metamorphism or 'deposition'.|Interlayered mafic and lesser felsic granulite.|high grade metamorphic rock|||N||17-JAN-23
Tyson Creek granulite|24545|Tyson Creek Granulite|78666|||Yes|Formation, beds|Informal|Resvd name published|Defined|||||Statherian|||||Statherian|1767|14|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992||A.J.Stewart|18-JUN-74|Wells, A.T.|12-NOV-76|Formal name would be Tyson Creek Granulite. Name probably replaced by Tyson Creek Metamorphics in 2008. Intruded by Possum Creek Charnockite.|Interlayered mafic and lesser felsic granulite. Suggested protolith was mafic flows or sills, with the felsic rocks being generated through metamorphic segregation or partial melting.|high grade metamorphic rock|||N||17-JAN-23
Udor Granite|41854|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1663|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1663|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|Interpreted to intrude Peculiar Complex. 2005 definition says unit is ungrouped.|Foliated biotite and biotite-muscovite leucogranite and granite; less common foliated muscovite granite, muscovite leucogranite and coarsely-porphyritic biotite-muscovite granite.|acid intrusive rock|||Y||17-JAN-23
Ulambaura Granodiorite|41855|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|||inferred|intrusion|Statherian|||inferred, intrusive relationship||||NT|Yes|67565|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|Intrudes Alkipi Metamorphics and unnamed felsic gneiss of the Yaya Metamorphic Complex. Published in Surface Geology of Australia, 1:1,000,000 scale - Northern Territory|Foliated, variably porphyritic hornblende granodiorite and tonalite with phenocrysts of plagioclase. Less commonly, hornblende-free,medium- grained biotite granodiorite.|acid intrusive rock|||Y||17-JAN-23
Uldirra Porphyry|24546|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Napperby Suite|30862|Mesoproterozoic||||intrusion|Paleoproterozoic|1775||inferred, geological correlation||||NT|Yes|48992|48992|A.J.Stewart|08-NOV-78|Brown, M.C.|22-NOV-78|Age: probably mid-Proterozoic, about 1500 m.y.; nearest 'date' is 1500-1800 (L P Black, pers. comm., 1975) on Napperby Orthogneiss.|Porphyritic microgranite with quartz and feldspar phenocrysts.|acid intrusive rock|||Y||17-JAN-23
Ulgnamba Lignite Member|24547|||||Yes|Member, phase|Formal|Resvd name published|Defined|Hale Formation|25689|||Late Eocene|||biozone|deposition|Lutetian|||biozone||4|10|NT|Yes|48992|48992|R.D.Shaw|21-NOV-78|Branch, C., Brown, M.|01-MAR-79|Age is possibly Eocene. Facies variant of the upper part of the Claraville Mudstone Member (Delaney Mudstone Member).|Lignite, carbonaceous shale; mud- and silt-rich layers.|organic rich sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Ulta Limestone|37622|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Early Miocene||||deposition|Chattian||||||40|NT|Yes|60703|60703|Megirian, D.|10-OCT-02|Kruse, P.D.|10-OCT-02|SANTA THERESA 1:100 000 sheet area.|White to dark yellowish-orange limestone, predominantly calcimudstone with terrestrial and freshwater gastropods, with minor calcarenite and conglomeratic  limestone; some vertebrate fossils.|carbonate sedimentary rock|||N||17-JAN-23
Ultim Diorite|81825|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Reno, B. (NTGS)|31-JAN-20|||To be published in Jinka 1:100k explanatory notes in 2021. Sheet 6052, 1:250k sheet Huckitta SF53-11. Named for Mount Ultim. Nearest town is Alateye.|Diorite and monzodiorite, subordinate quartz monzodiorite and tonalite: fine-grained, equigranular, variably biotite and/or hornblende-bearing; fresh to moderately weathered; undeformed to foliated to gneissic.|intermediate intrusive rock|||Y||17-JAN-23
Ulunourwi Formation|18798|||||Yes|Formation, beds|Formal|Other new published name|Defined|Habgood Group|7964|||Statherian|||inferred|deposition|Statherian|||inferred, underlying unit||||NT|No|42597|43010|||||Age: Statherian|Mudstone: red, purple and green, dolomitic in part, laminated, desiccation cracks, evaporite nodules; sandstone: fine to medium-grained; silty dololutite and dolostone, rarely stromatolitic.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Uluru Clay|18802|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Pleistocene||||deposition|Zanclean||||||60||No|42359||||||Age: >5-~1Ma.|Thick sequence of uniform clays in Lake Amadeus.||||N||17-JAN-23
Umbeara Sandstone|72418|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Hatches Creek Group|8139|||Paleoproterozoic||||deposition|Paleoproterozoic||||||||No|62642||||||Probably supersedes Umbeara Shale?|Non-outcropping; inferred subarkosic/sublithic/lithic arenite, quartz arenite; minor pyroclastic rocks.|siliciclastic sedimentary rock|||N||17-JAN-23
Umbeara granite|69491|Umbeara granites|42440|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||||||intrusion|||||||||No|61154||||||Fregon Domain.|Seven granitic phases. Granite generally forms discrete veins, dykes and small bodies scattered within more extensive exposures of Musgravian gneisses;  many textural types, including equigranular to porphyritic, and fine to coarse granite, microgranite.|acid intrusive rock|||Y||17-JAN-23
Umbolooga Subgroup|18813|Bauhinia Downs Subgroup|1270|||Yes|Subgroup|Formal|Variation of published name|Described|McArthur Group|11512|||Statherian|1640|4|isotopic, U/Pb-Pb/Pb ion probe||Statherian|||inferred||||NT|No|30344||||||Radiometric age from HYC Pyritic Shale Member, Barney Creek Formation.|Cyclic dolostone, mudstone, sandstone, evaporite casts, tuffite.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Umbrawarra Leucogranite|18815|Umbrawarra Granite|30408|||Yes|Formation, beds|Formal|Other new published name|Described|||Tennysons Suite|31732|Paleoproterozoic|1805|12|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Paleoproterozoic|1825|7|isotopic, U/Pb-Pb/Pb ion probe|||||No|39679||||||See Umbrawarra Granite for full description. See AGSO Bull 229. Intrudes Burrell Creek Formation.|Light grey to pink, medium- to coarse-grained, porphyritic to equigranular biotite-muscovite monzonite leucogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Umutju Granite Suite|33650|Umutju|30604|||Yes|Group, Suite|Formal|Variation of reserved name|Defined|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1120|||intrusion|Mesoproterozoic|1180||||||NT|Yes|60683|60683|Scrimgeour I., Close D.,Edgoose C.|13-NOV-96|Beier, P.|27-JUL-99|Petermann Ranges 1:250 000 sheet area. Equivalent to part of Musgrave-Mann Metamorphics, Olia Gneiss and unnamed metamorphosed granites of Forman (1966, 1972).|Foliated to undeformed clinopyroxene- and/or hornblende-bearing porphyritic granite with rounded blue-grey phenocrysts of K-feldspar. Less commonly equigranular and medium-grained. Localised biotite-hornblende-garnet migmatite|acid intrusive rock|||Y||17-JAN-23
Unbunmaroo Member|18819|||||Yes|Member, phase|Formal|Resvd name published|Defined|Ninmaroo Formation|14173|||Datsonian|||biozone|deposition|Payntonian|||biozone||69|250|QLD|Yes|46897||Druce E.C., Radke B.M., Shergold J.H.,|01-JAN-78|Whitaker, W.|21-DEC-79||Medium to thick bedded limestones (peloidal (pellet-like) clast and peloidal grainstone (Dunham, 1962), micrite (probably stromatolitic), sandy peloidal grainstone) Pseudomorphs of gypsum and anhydrite.|carbonate sedimentary rock|||N||17-JAN-23
Unca Granite|26285|Alarinjela Suite|30857|||Yes|Formation, beds|Formal|Other new published name|Redefined|||Fosters Suite|80343|Statherian|1713|||intrusion|Statherian|1780|4|inferred, geochemical correlation|intrusion|||NT|Yes|39888|49036|R.D.Shaw|11-MAR-82|Normington, V.|12-OCT-18|Previously undivided metamorphics of the Arunta complex. Said to be of Alarinjela Suite (1997, 2002), soon to be included in Fosters Suite. See: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin., and attached updated definition.|Granite; strongly weathered, leucocratic, inequigranular, fine-grained assemblage composed of quartz-K-feldspar-plagioclase. Rare brown biotite or chlorite after biotite. Minor muscovite is interpreted as secondary. Local accessory titanite. Foliated.|acid intrusive rock|||Y|I-type|17-JAN-23
Undandita Member|26188|Undandita member|18823|||Yes|Member, phase|Formal|Other new published name|Defined|Brewer Conglomerate|2526|||Famennian||||deposition|Famennian|||||||NT|No|31566|31566|||||Age - Famennian-Frasnian.|Conglomerate with sedimentary clasts, sandstone lenses.  Organic matter, including spores, leaves and woody material, is commonly preserved in beds with an early diagenetic carbonate cement.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Undoolya Siltstone Member|18837|||||Yes|Member, phase|Formal|Variation of published name|Defined|Heavitree Formation|8223|||Neoproterozoic||||deposition|Neoproterozoic||||||16|NT|Yes|35102|48992|Clarke D.B., Shaw R.D.|17-MAY-79|Branch, C.T.|01-DEC-79|Name Undoolya not to be confused with Ungoolya (SA).|Purple and green interlaminated siltstone and shale and rare edgewise conglomerate. Several beds of fine-grained silty sandstone in the upper part.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Unimbra Sandstone|28281|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Orosirian|1810||inferred, intrusive relationship|deposition|Orosirian|1820||inferred, underlying unit||120|1500|NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project.  Within the Hatches Creek Group  (Lower Wauchope Subgroup). Intruded by Treasure Suite, Devils Suite.|Subarkosic, sublithic and lithic (partly volcaniclastic?) arenite and quartz arenite, commonly pebbly; minor conglomerate, greywacke and pyroclastic rocks. Displays shatter cones related to Amelia Creek impact structure.|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Uniya Formation|26967|Jarong Conglomerate|8877|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Ediacaran||||deposition|Cryogenian||||||137|NT|Yes|40765||Dundas D, Edgoose C.J.||Brakel, A.|08-JAN-85|Supersedes Uniya Tillite. Formerly assigned in part to Stray Creek Sandstone, Buldiva Sandstone, Tolmer Group and in part to Witch Wai Conglomerate in DALY RIVER 1:100 000 sheet area; and to Jarong Conglomerate in WINGATE MOUNTAINS 1:100 000 sheet area.|Diamictite, glaciolacustrine arenite with dropstones: fluvioglacial conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Urapunga Granite|30318|Roper River granite""|41427|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Orosirian|1858|7||intrusion|Orosirian|1858|7|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||NT|No|61403|23937|Plumb K.A., Page R.|21-JUN-96|||Previously mapped as part of the now redefined "Mount Reid beds" of Dunn (1963c). Intrudes Mount Reid Rhyolite.|Coarse grained megacrystic biotite granite; fine to medium grained equigranular felsic porphyry dykes|acid intrusive rock|||Y||17-JAN-23
Utanta Granite|33487|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Mantarurr Granite Suite|33648|Mesoproterozoic||||intrusion|Mesoproterozoic|||||||NT|Yes|60572|60683|Scrimgeour I., Close D., Edgoose C.|29-APR-99|Beier, P.|27-JUL-99|Petermann Ranges 1:250 000 sheet area. Age by correlation with Kulu Granite.  Age: ~1170Ma. Within the Pitjantjatjara Supersuite.|Felsic, coarsely porphyritic foliated biotite granite.|acid intrusive rock|||Y||17-JAN-23
Utnalanama Granulite|19017|Utnalanama granulite|24548|||Yes|Formation, beds|Formal|Variation of reserved name|Described|Strangways Metamorphic Complex|17395|||Statherian|1763|2|||Statherian|1778|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|39470||||||For definition see Utnalanama granulite|Coarse-grained pale to dark grey tonalitic to dioritic granulite with a granular texture (I.e. a granofels).|high grade metamorphic rock|||N||17-JAN-23
Utopia Quartzite|19019|||||Yes|Member, phase|Formal|Other new published name|Defined|||||Paleoproterozoic||||deposition|Paleoproterozoic|1820|15|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age|||NT|Yes|33102||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|24-JUN-74|Maximum depositional age. Geological Province: Arunta Block (Division 3). Of Reynolds Range Group? Downgraded to Member of the Deep Bore Metamorphics in 2022.|Quartzite, granule conglomerate, ironstone lenses; quartzite, muscovite-bearing.|metasedimentary rock|||N||17-JAN-23
Utting Calcarenite|19021|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Weaber Group|19643|||Visean|||||Visean||||||120||No|45038||||||Defn on Tech File D/52-10. Formerly mapped as "Milligans Beds".|Open shelf carbonates. Richly fossiliferous including brachiopods, corals and trilobites. Sandy limestone, calcareous sandstone; minor sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
V-Creek Limestone|19024|||||Yes|Formation, beds|Formal|Other new published name|Defined|Narpa Group|37962|||Middle Cambrian||||deposition|Middle Cambrian|||||||QLD|No|34395|44210|||||See also Lexicon. Northeastern Georgina Basin.Contains thin oil shale, bituminous limestone and bituminous shale. Sparked interest in oil shale potential of the Georgina Basin.|Limestone, bituminous limestone, sandy limestone, calcilutite, minor arenite, chert nodules|carbonate sedimentary rock|||N||17-JAN-23
Vaddingilla Formation|24549|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Hanlon Subgroup|24304|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Statherian|1820||inferred, lithostratigraphic correlation|||800|NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project.  Within the Hatches Creek Group.|Siltstone, shale, feldspathic/lithic and micaceous arenite.|fine grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Valley Metamorphics|75902|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Paleoproterozoic||||deposition|Neoarchean|2512.6|7.5|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|69917||Whelan, J. (NTGS)|31-MAR-11|||For use in the Illogwa Creek and Hale River 1:250 000 sheet areas|Garnet-muscovite-biotite schist.|metasedimentary siliciclastic rock|||N||17-JAN-23
Van Diemen Sandstone|19044|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Lutetian||||deposition|Lutetian||||||250|NT|No|31410|45121|||||Geological Province: Money Shoal Basin - north and south.|Friable white to yellow, medium to coarse quartzose sandstone, lenticular beds of siltstone, and minor beds of granular conglomerate; strongly weathered in outcrop.|siliciclastic sedimentary rock|||N||17-JAN-23
Vanderlin Limestone|19050|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Holocene||||deposition|Pleistocene|2|1.5||||||No|37605||||||Age: <1.5Ma. Occurs on the Sir Edward Pellew Islands, Gulf of Carpentaria. Together with Beatrice Islands Limestone thickness is 5m. Geological region: East Arnhem Land.|Coarsely cross-bedded limestone, rich in gastropods and foraminifera, with fine oolitic layers in foreset beds; tabular cross-beds may be up to 5m thick, with a few thin bands of quartz sandstone in the foresets.|carbonate sedimentary rock|||N||17-JAN-23
Vaughan Springs Quartzite|19064|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Cryogenian|||inferred|deposition|Cryogenian|||inferred||2750|2800||No|30258||||||Part of extensive sand blanket including Mount Kinahan Sandstone, Heavitree Quartzite and Lewis Range Sandstone (Redcliff Pound Group) and Townsend Quartzite. Max. depositional age: 1632+/-12Ma from detrital zircons. Relationships from RefID 65232 p70 reference to (misspelt) Mount Vaughan Quartzite. 'Minimum' age from glauconite dating of Trueur Member in 1971 (this member is not at the top of Vaughan Springs Quartzite), but may be as young as 840 Ma (Supersequence 1 of Centralian Superbasin).|Bedded to well bedded quartz sandstone and quartzite, locally pebbly; minor mudstone, shale.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||25-JUL-23
Vaughton Siltstone|19065|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Statherian||||deposition|Statherian||||||1000|NT|No|44299|43010|||||Formerly of McArthur Group.  In eastern Arnhem Land.|Mudstone: khaki green to black, carbonaceous in part, generally massive; minor sandstone and dolostone interbeds; common siderite nodules; basal conglomerate with friable sandstone matrix; very recessive.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Vee Formation|19070|Vee formation|19071|||Yes|Formation, beds|Formal|Resvd name published|Defined|Bathurst Island Group|1249|||Campanian||||deposition|Cenomanian|||||||NT|No|41459|42442|A.J.Mory|14-SEP-87|||Defined by Mory (1988).|Marl, calcilutite, calcareous claystone.||||N||17-JAN-23
Velkerri Formation|19074|Cobanbirini Formation|26483|||Yes|Formation, beds|Formal|Other new published name|Redefined|Maiwok Subgroup|25195|||Ectasian|1312.9|.7|inferred, intrusive relationship|deposition|Calymmian|1417|29|isotopic, Re/Os|maximum depositional age||1483|NT|Yes|46679|71779|Sweet, I. P. , after  Dunn (1963), updated by T.J. Munson +D. Revie|02-APR-18|Normington, V.|29-MAY-18|Formerly the lower part of the now abandoned Cobanbirini Fm (of Paine, 1963 and Smith, 1964).  Now assigned to redefined Maiwok Subgroup (Roper River). Oldest petroleum source rock in the Beetaloo Sub-basin. Various studies have based their interpretation of this unit on a tripartite subdivision of organic-rich sub-units, i.e. 3 unnamed members. Although the 1308 Ma age is said to be a maximum depositional age, the sample appears to have come from near the top of the Velkerri Formation (Yang et al. 2018).|Grey and black (carbonaceous) mudstone and siltstone, and minor fine glaucon. sandstone.  Rocks laminated, but intervals that are structureless or characterised by abundant convoluted laminae are common. Calcite nodules and veins, and pyrite are present.|fine grained siliciclastic rock|||N||17-JAN-23
Venerable Basalt|40433|Venerable|23104|||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||eruption|||||||||No|||Green, M.|27-FEB-04|||To be used on  MOUNT THEO 1:250 000 (SF5208). Originally reserved as Venerable only (Blake 1992).||basic volcanic rock|||N||17-JAN-23
Vizard Group|30314|Vizard Formation|19141|||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Statherian|||inferred, overlying unit|magmatic crystallisation|Statherian|1640|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|||NT|No|22538|23937|||||First published by Cochrane & Edwards (1960) - CSIRO Miner. Invest. Tech. Pap. 1. Defined as Vizard Formation. Upgraded to Group status in URAPUNGA and ROPER RIVER Explan.Notes (2001). Min. age from tuff in Nagi Formation. Max. depositional age from Saint Vidgeon Formation.|Dolostone, siltstone, sandstone and tuff.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Vulcan Formation|19148|||||Yes|Formation, beds|Formal|Variation of published name|Described|Swan Group|17573|||Valanginian||||deposition|Callovian||||||||No|42053||||||See also informal subdivisions: Lower Vulcan Formation, Upper Vulcan Formation. Includes interpreted deep marine fan sediments considered to be a reservoir facies.|Marine sediments including mudstones and submarine fan sandstones.|siliciclastic sedimentary rock|||N||17-JAN-23
W-Fold Shale Member|19151|W-Fold Member|19150|||Yes|Member, phase|Formal|Variation of published name|Fully described|Barney Creek Formation|1130|||Proterozoic||||deposition|Paleoproterozoic|||||||NT|No|32658||||||Within the Umbolooga Subgroup.|Green and red dolomitic siltstone and shale, and green vitric tuff. Much of the siltstone appears to have undergone K-metasomatism.|carbonate sedimentary rock|||N||17-JAN-23
Wabudali Granite|23115|||||Yes|Formation, beds|Formal|Resvd name published|Fully described|||||Calymmian|1586|4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Calymmian|1586|4|inferred, structural relationship|||||No|43631||Blake D.|18-MAY-92|||Mount Doreen 1:250 000 sheet.  Intrudes Lander Rock beds, Yumurrpa Granophyre and Reynolds Range Group. Formerly included in Southwark Suite, but recent maps suggest Wabudali is older than the Chewings Event (1590-1570 Ma), while the Suite is younger than this event.|Biotite +/- muscovite granite, commonly with abundant fine to medium-grained tabular feldspar phenocrysts, lesser fine to medium equigranular phase, rare biotite blebs and rafts of retrogressed metasediments|acid intrusive rock|||Y||24-JUL-23
Wade Creek Formation|33982|Wade Creek Sandstone|19173|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Mesoproterozoic||||deposition|Mesoproterozoic|||||||WA|No|24503||||||See Wade Creek Sandstone for definition. Is this a deliberate name change or a misspelling?|Fine- to coarse-grained quartz sandstone, lithic quartz sandstone, pebbly sandstone, conglomerate, siltstone, and mudstone; also ferruginous chert breccia member.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Wadeye Group|74204|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Bashkirian|||||Serpukhovian||||||||No|61542||||||Includes Point Spring Sandstone (formerly part of Weaber Group), Arco and Aquitaine Formations. Overlies Weaber Group; unconformably overlain by Kulshill Group. Geological province: Bonaparte Basin/Petrel-Sub-basin.|Siltstone, shale, sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Wadjeli Sandstone Member|40035|||||Yes|Member, phase|Formal|Other new published name|Defined|Mainoru Formation|11034|||Calymmian||||deposition|Calymmian||||||15|NT|No|60573|23937|||||Together with Gibb Member - previously mapped at upper boundary of Limmen Sandstone (Dunn, 1963a, 1963c).  Both members now reassigned to lower Mainoru Fm (Abbott and Sweet, 2001). Within the Roper Group. Age: >1493+/-4Ma.|In type section, about 10m of white- to pink-weathering, medium bedded, medium to fine sandstone, overlain by several metres of poorly exposed red beds which mantle the dip slope of ridge-forming sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Wagait Granite|24629|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Wagait Suite|31691|Paleoproterozoic|1852|33|isotopic, Rb/Sr|intrusion|Paleoproterozoic|1863|4|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|23822||D.A.Berkman|21-MAY-79|Brakel, A.|27-NOV-86|Pine Creek Province. Intrudes Early Proterozoic Fog Bay and Welltree Metamorphics; intruded by Murrenja Dolerite.|Hornblende granodiorite, granite, mylonitised granite, biotite granite and granodiorite, epidotised granite, rarely porphyritic.|acid intrusive rock|||Y|I-type|17-JAN-23
Wagait Suite|31691|||||Yes|Group, Suite|Formal|STRATLEX Entry|Fully described|||||Paleoproterozoic|1853||inferred||Paleoproterozoic|1863||inferred||||NT|No|50586||||||Pine Creek Province.|Restite-rich, with some late fractionation of felsic phase. Mainly medium-grained granodiorite, monzogranite and granite.|acid intrusive rock|||Y||17-JAN-23
Waite Formation|19212|||||Yes|Formation, beds|Formal|Other new published name|Defined|Alcoota beds|76102|||Zanclean|||biozone|deposition|Late Miocene|||biozone||19|130|NT|No|44223|45028|||||Overlies Arunta Block.  One ref states age: >10Ma, but many show the unit as Miocene - Pliocene (>5.3Ma).  Geological Province: Hale, Ti-Tree and Waite  Basins.[may correlate with Lake Eyre Basin rocks? - A.Stewart OCT-2010]|Limestone: chalcedonic; calcarenite; rare quartzic mudstone. Sandstone, siltstone, minor sandy conglomerate.|carbonate sedimentary rock|||N||17-JAN-23
Wakurlpa Granite|30242|Wakurlpa|23118|||Yes|Formation, beds|Formal|Resvd name published|Described|||Southwark Suite|40018|Mesoproterozoic|||inferred, geological correlation|intrusion|Mesoproterozoic||||||||No|44158||Young D.|29-APR-93|||Reserved as Wakurlpa.  Mt Doreen 1:250 000 sheet area. Age: ~1570Ma.|Megacrystic muscovite-biotite granite|acid intrusive rock|||Y||17-JAN-23
Wala Wuru Granite|33488|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Mantarurr Granite Suite|33648|Mesoproterozoic||||intrusion|Mesoproterozoic|||||||NT|Yes|60572|60683|Scrimgeour I., Close D., Edgoose C.|29-APR-99|Beier, P.|27-JUL-99|Petermann Ranges 1:250 000 sheet area. Age by correlation with Kulu Granite. Age: ~1170Ma.|Foliated megacrystic granite with a fine-grained biotite -rich matrix.|acid intrusive rock|||Y||17-JAN-23
Walabanba Member|72423|Walabanba|35619|||Yes|Member, phase|Formal|Resvd name published|Defined|Lander Rock Formation|69780|||Statherian|1789||inferred, intrusive relationship|deposition|Orosirian|1822||inferred||||NT|Yes|62642||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||Reserved as Walabanba.  Intruded by Esther Granite. Maximum age inferred from detrital zircon ages.|Slate, phyllite and mica schist, metapelite, metasiltstone and metasandstone including felsic tuff.|metasedimentary siliciclastic rock|||N||17-JAN-23
Walal Granite|33656|Walal|30600|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||Pitjantjatjara Supersuite|39078|Mesoproterozoic|1190|||intrusion|Mesoproterozoic|1590||||||NT|Yes|60683|60683|Scrimgeour I., Close D.,Edgoose C.|27-JUL-99|Beier, P.|27-JUL-99|Petermann Ranges 1:250 000 sheet area. Age: 1590Ma (core age with U-Pb); 1190Ma (rim age with U-Pb).|Porphyritic hornblende-biotite granite and granodiorite, with less abundant equigranular leucogranite; variably deformed and recrystallised to garnet-bearing assemblages|acid intrusive rock|||Y||17-JAN-23
Walbiri Dolostone|75550|Walbiri Dolomite|27249|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Cambrian||||deposition|Cambrian||||||||No|65232||||||Deliberate change of name? Although no NTGS article specifying deliberate change has been indexed, it has become standard practice for NTGS to change all dolomite names to dolostone. Ngalia Basin.|Thick-bedded dolostone; minor mudstone, shale, sandstone and stromatolitic dolostone; fossiliferous|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Waldo Pedlar Member|27602|||||Yes|Member, phase|Formal|Variation of published name|Redefined|Pertatataka Formation|15094|||Ediacaran|575||inferred|deposition|Neoproterozoic|678|11|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|48890|48890|after Wells et al (1967)||Beyer, E., Normington, V.|08-DEC-15|Defined 1967. SHRIMP age is a maximum depositional age from Kositcin at al. (2015). See unit definition.|Thinly-bedded, fine-grained, flaggy sandstone with ripple and current-flow markings.|siliciclastic sedimentary rock|||N||17-JAN-23
Waldrons Hill Complex|42431|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Statherian|1730||||Orosirian|1820|||||||No|60681||||||Within group of 1820-1730 Ma igneous rocks.|Dolerite/amphibolite, very highly magnetic, high gravity response.|high grade metamorphic rock|basic intrusive rock||N||17-JAN-23
Walford Dolomite|19228|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Fickling Group|6631|||Statherian||||deposition|Statherian|1649|7|isotopic, U/Pb-Pb/Pb ion probe|||400|QLD|Yes|35640|49001|Sweet I.P.|30-NOV-75|Staines, H.R.E.|24-JUN-76|Included in the Loretta Supersequence. Name revised to Walford Dolostone in NT, but Walford Dolomite continues to be used in Qld, e.g. 2013, Geology of Queensland, p42,43, 55. Source of hydrocarbons in this unit was probably Mount Les Siltstone.|Blocky grey oolitic, stromatolitic and intraclastic dolomite; minor dolomitic sandstone and shale; leached pinkish brown shale, siltstone and dolomitic sandstone at base;  silicified dolomite with many primary structures perserved, at top of unit.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Walford Dolostone|79411|Walford Dolomite|19228|||Yes|Formation, beds|Formal|Variation of published name|Described|Fickling Group|6631|||Statherian|1649|7||deposition|Statherian||||||||No|69433||||||Name revised to Walford Dolostone in NT, but Walford Dolomite continues to be used in Qld e.g. 2013, Geology of Queensland, p42,43, 55.|Dolomite, blocky grey oolite, stromatolitic and interclastic; minor dolomitic sandstone and shale, commonly silicified at the top.|carbonate sedimentary rock|||N||17-JAN-23
Walkandi Formation|24069|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Anisian||||deposition|Changhsingian||||||134|SA|No|41536|41063|P.S.Moore|30-SEP-82|||Previously named "Unnamed redbeds" E - M.|Shallow/ephemeral/lacustrine deposits of basal red beds, grading up into a slightly carbonaceous shale/siltstone succession in basinal areas.|siliciclastic sedimentary rock|||N||17-JAN-23
Walker River Formation|23121|Mullaman beds|13380|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Cenomanian||||deposition|Aptian||||||100|NT|Yes|43630|43630|Krassay A.|14-JUN-94|Kruse, P.D.|12-JAN-95|Blue Mud Bay 1:250 000 sheet area. Previously part of Mullaman beds. Hosts the Groote Eylandt and Rosie Creek South sedimentary-type Mn deposits.|Variably ferruginous and clayey, medium-grained sandstone; some fine to coarse-grained sandstone; massive claystone and siltstone; minor conglomerate and breccia; marine fauna including pelecypods and ammonites|siliciclastic sedimentary rock|||N||17-JAN-23
Wallara Formation|78876|Finke beds|75936|||Yes|Formation, beds|Formal|Resvd name published|Redefined|||||Cryogenian|||inferred, biostratigraphic correlation|deposition|Tonian|750||inferred||||NT|Yes|71088||Edgoose, C. (NTGS)|11-APR-14|Kraus, S., Normington, V.|10-NOV-14|SG53-01 Henbury. Mixed sandstone, silicified dolostone and siltstone unit. Sits above Bitter Springs Formation and below Areyonga Formation. Poorly exposed in northern, south central and western Amadeus Basin. Best known and described from Wallara 1 petroleum hole. Has been previously informally referred to as "Finke beds". The name will be published in 2015 or 2016 in NTGS and Geological Survey of Western Australia publications and maps.|Predominantly dolostone, quartz sandstone, feldspathic quartz sandstone, and red and green mudstone; with subordinate dark carbonaceous mudstone and shale and arkosic sandstone. Commonly silicified to chert and sandy chert duricrust at surface.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Wallis Formation|77886|Wallis Siltstone Member|19295|||Yes|Formation, beds|Formal|Variation of published name|Described|Wild Cow Subgroup|37739|||Calymmian||||deposition|Calymmian|||||100|150||No|67323||Sweet, I.||||In Geology of Queensland 2013, p52, 54. Of Wild Cow Subgroup, South Nicholson Group. May extend into NT?|Greenish-brown weathering, very fine to fine grained laminated sandstone with micaceous partings; minor siltstone and shale.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Wallumbilla Formation|19323|Blackdown Formation|1853|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Wilgunya Subgroup|20031|||Albian||||deposition|Barremian||||||350|QLD|No|33642|63979|||||First described by Isbell (1957). Redefined 1967, 2002. Age - Aptian to Albian : ~113-~98Ma. Unit is laterally equivalent to the Bulldog Shale. In SA of the Maree Subgroup (Neales River Group).  In Qld of Wilgunya Subgroup (Rolling Downs Group). Age: 111-117 Ma. Fission Track age: 87-109 Ma. (RefID 65119, 2009)|Marine grey mudstone and siltstone with minor interbeds of fine-grained glauconitic and calcareous sandstone, local thin micritic limestone beds and heavy mineral strandline accumulations; down-sequence glacial ice-rafted erratics.|fine grained siliciclastic rock|carbonate sedimentary rock|intracratonic|N||25-MAY-23
Walmudga Formation|30312|Kookaburra Creek Formation|9765|||Yes|Formation, beds|Formal|Resvd name published|Defined|Nathan Group|26072|||Calymmian||||deposition|Statherian||||||250|NT|No|60573|23937|Plumb K.A.|21-JUN-96|||To be used for upper part of old 'Kookaburra Creek Formation'.  Corresponds to the upper part of the undefined Kookaburra Creek Formation of Dunn (1963c) above the Yalwarra Volcanics, and was included in the  Balbirini Dolomite by Jackson et al (1987).|Purple mudstone and siltstone; dolomitic siltstone; quartz sandstone.Capped by a 2m-thick ferruginous and manganiferous chert breccia (=regolith).|siliciclastic sedimentary rock|||N||17-JAN-23
Walnut Granodiorite|42255|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Frederick Suite|40071|Paleoproterozoic|1810|5|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Paleoproterozoic|1801|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|23809||||||Of Frederick or Inningarra Suites?|Variably porphyritic, medium-grained, equigranular, hornblende-biotite granodiorite.|acid intrusive rock|||Y||17-JAN-23
Walu Granite|33813|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Hull Granite Suite|36768|Stenian|1080||inferred, intrusive relationship|intrusion|Stenian|1084|9|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|50321|65256|Edgoose C., Close D.|23-NOV-99|Kruse, P.D.|21-JAN-02|BLOODS RANGE 1:250 000 map sheet area. Granite/porphyry. Age: 1084+/-9Ma (U-Pb SHRIMP) Type Locality: 24 41' 09.48S, 129 26' 52.01E (WGS 84). Intrudes the Mount Harris Basalt.|Pale pink, leucocratic and medium- to fine-grained. Contains greenish biotite, and more rarely, hornblende, as well as patches and veins of epidote and quartz; unfoliated or weakly so, with narrow shear zones.|acid intrusive rock|||Y||17-JAN-23
Walungurru Volcanics|42366|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Statherian|1617|14|isotopic, U/Pb|eruption|Statherian|1650|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|61387||Close, D.|13-DEC-04|||Mount Rennie 1:250, 000 map sheet (SF52-15). Of the Kintore Domain, Warumpi Province.|Felsic, intermediate to mafic volcanic rocks including silicified cryptocrystalline, porphyritic andesine, andesite, dacite, basaltic andesite, basalt, and dolerite.|metamorphosed acid igneous rock|metamorphosed basic igneous rock||N||17-JAN-23
Waluwiya Suite|41856|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1630||inferred|intrusion|Statherian|1645||inferred||||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|Of the 1640-1630Ma intrusive rocks era. Intrudes Yaya Metamorphic Complex.|Dark, fine- to medium-grained, foliated hornblende-biotite-garnet granodiorite to quartz diorite; foliated hornblende granodiorite; hornblende-biotite felsic migmatite; weakly porphyritic granodiorite and charnockite|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Walytjatjata Granite|33653|Walytjatjata|30598|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Umutju Granite Suite|33650|Mesoproterozoic|1175|10||intrusion|Mesoproterozoic|1177|10|||||NT|Yes|60572|60683|Scrimgeour I., Close D.,Edgoose C.|13-NOV-96|Beier, P.|27-JUL-99|Petermann Ranges 1:250 000 sheet area. Ages: 1175 +/- 7 and 1175+/-10Ma (Kober Pb-Pb zircon evaporation). Within the Pitjantjatjara Supersuite. Intruded by 1078 Ma Alcurra Dyke Swarm and 800 Ma Amata Dyke Swarm.|Porphyritic clinopyroxene granite with rounded blue-grey phenocrysts of K-feldspar, locally megacrystic or coarse-grained equigranular, variably deformed and recrystallised to garnet-bearing assemblages; rare migmatite.|acid intrusive rock|||Y||17-JAN-23
Wanapi Dolostone Member|79380|Wanapi Dolomite Member|24554|||Yes|Member, phase|Formal|Variation of published name|Defined|Mount Doreen Formation|12639|||Ediacaran||||deposition|Ediacaran||||||||No|69439||||||See definition for Wanapi Dolomite Member.|Pink, finely-laminated dolomudstone, with nodular and bulbous stromatolites, slump breccias and barite pseudomorphs after gypsum and anhydrite.|carbonate sedimentary rock|||N||17-JAN-23
Wandie Granite|27657|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Burnside Suite|31738|Orosirian|1800|||intrusion|Orosirian|1825|||||||No|39679||Needham, R.S.|13-JUL-83|||Pine Creek Province.  Of the Cullen Supersuite. Intrudes Burrell Creek Formation.|Massive, pale pink, medium-grained equigranular biotite leucogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Wangala Granite|24556|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Napperby Suite|30862|Mesoproterozoic|1500|100|isotopic, Rb/Sr|intrusion|Paleoproterozoic|1777|12|isotopic, U/Pb-Pb/Pb ICP-MS||||NT|Yes|48992|48992|A.J.Stewart|14-APR-75|Wells, A.T.|12-NOV-76|Age: Rb-Sr Whole Rock 1500+/-100ma. Same as Yaloolgarrie Granite? See also Wangala Granite Schist, for SHRIMP monazite age.|Contains multiple phases of variably fractionated, crustally contaminated granodiorite-granite. Includes biotite-muscovite porphyritic granite, equigranular granite, rapakivi granite, microgranite and leucogranite.|acid intrusive rock|||Y||17-JAN-23
Wangalinji Member|38512|||||Yes|Member, phase|Formal|Resvd name published|Defined|Playford Sandstone|37727|||Calymmian|1492|4||deposition|Calymmian|1600|20||||390|NT|Yes|62659||Rawlings, D.|19-JUN-03|Kruse, P.D.|11-APR-05|A disconformity and angular unconformity exists between the Wangalinji Member and the overlying Widdallion Sandstone Member. Check relationships. Does Widdallion Member over- or underlie?|White, thick bedded, medium to coarse grained, silicified to friable, locally pebbly, sublithic to quartzose sandstone; laminated shale, siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Wangarlu Formation|19392|Wangarlu Mudstone Member|27251|||Yes|Formation, beds|Formal|Other new published name|Defined|Bathurst Island Group|1249|||Maastrichtian|||biozone|deposition|Albian|104||biozone|||2000|WA|No|41459|42442|||||Age: ~104-~65Ma.|Kaolinitic mudstone, siltstone, commonly radiolaria-rich, montmorillonitic when fresh; minor silty claystone, sublabile sandstone; scattered nodular pyrite.|siliciclastic sedimentary rock|||N||17-JAN-23
Wankari Volcanics|33646|Wankari volcanics|67926|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|Tjauwata Group|36772|||Stenian|1041|2||eruption|Stenian|1051|22|isotopic, U/Pb-Pb/Pb ion probe|||||No|24496||Edgoose C.|27-JUL-99|||Age (see the informal Wankari volcanics): 1041+/-2Ma (Pb-Pb evap.technique) and 1051+/-22Ma (SHRIMP U-Pb zircon). See also the misspelt Wankeri volcanics.|Locally amygdaloidal, fine-grained, porphyritic felsic volcanics with minor interlayered mafic units. Includes porphyritic rhyolite with rare epidotized and amygdaloidal mafic volcanics.|acid volcanic rock|basic volcanic rock||N||04-OCT-23
Wanyanmera Suite|80478|Giddy Suite|30863|||Yes|Group, Suite|Reserved|Reserved|Reserved|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||Whelan, J. (NTGS)|27-MAR-18|||Suite to consist of the Bukudal, Garrthalala, Dhalinybuy and Giddy granites. To be published in the Gove-Arnhem 1:100k explanatory notes.|A-type fayalite-biotite +/- clinopyroxene-bearing granites.|acid intrusive rock|||Y|A-type|17-JAN-23
Warburton Basin - sediments 80515|80515|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Middle Ordovician|||inferred||Early Cambrian|||inferred|||||No|||||||For use by Tony Meixner in 'Estimates of geological and geophysical surfaces' work. Also GA Solid geology dataset.|sedimentary rocks.|sedimentary rock|||N||12-OCT-23
Ware Group|38831|Ware Range Group|38759|||Yes|Group, Suite|Formal|Resvd name published|Fully described|||||Orosirian|1815||inferred, intrusive relationship|eruption|Orosirian|1824|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|62377||Crispe, A.|31-JUL-03|||SE52-03. Near Tanami mine. Max age from Mount Winnecke Formation, Nanny Goat Volcanics. Minimum age from age of intrusive Winnecke Granophyre. Hosts gold deposits.|Rhyolites, ignimbrites, siliciclastic sediments.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Ware Group and correlatives|72690|||||Yes|Group, Suite|Informal|Variation of published name|Described|||||Orosirian|||||Orosirian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Quartz-muscovite-feldspar schist, quartz-feldspar rock, felsic rock, varies fine- to coarse-grained, moderately foliated. Possible correlative of Ware Group|metasedimentary siliciclastic rock|||N||17-JAN-23
Warimbi Schist|26331|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Calymmian|1590||||Statherian|1785|22|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992|48992|A.J.Stewart|26-JUL-73|Strusz, D.L.|05-NOV-73|See also variations: Warimbi Gneiss, Warimbi granite, Warimbi Orthoschist.|Biotite-sericite-quartz orthoschist with quartz and rare feldspar augen|metamorphosed acid igneous rock|||Y||17-JAN-23
Warnes Sandstone Member|24562|||||Yes|Member, phase|Formal|Resvd name published|Defined|Kurinelli Sandstone|24347|||Orosirian|1825|11|inferred|deposition|Orosirian|1837|7|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|0|500|NT|Yes|39900|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|16-FEB-84|Davenport Project.  See also the mis-spelt Warnes Sandstone. Conformable band at or near base of Kurinelli Sandstone in NW; intruded by rhyolitic granophyre.|Characteristically massive, variably feldspathic (and lithic?) sandstone and quartz sandstone.|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Warramana Sandstone|24563|||||Yes|Formation, beds|Formal|Unknown or process pending|Redefined|Tawallah Group|17902|||Statherian|1713|6||deposition|Statherian|1713|6||||120|NT|Yes|44287|42812|Plumb K.A., Paine A.G.L. (1964)|02-MAR-94|Kruse, P.D.|24-FEB-94|Name used 1964, but defn not published. Defn on Tech File E/53-8. Name dropped by 1973, but reinstated 1991 & defn published.|Lower red hematitic medium-to thick bedded litharenite, separated from upper white thin to medium bedded sublitharenite and minor litharenite by a thin ferruginous interval.|medium-coarse grained siliciclastic rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Warramunga Formation|30741|Warramunga Group|28169|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian|1851|4|inferred, intrusive relationship|deposition|Orosirian|1861.4|3.3|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||3000|NT|Yes|43751|24172|||Kruse, P.D.|31-DEC-95|Definition also published in Flynn and Tennant Creek 1:100 000 Explan notes.[Advice & cards from N. Donnellan NTGS 18-JUN-98]. Intruded by Tennant Creek Granite (age 1851+/-4 Ma. Status revised based on lithological/structural grounds (Tennant Creek Explan.Notes 1999). Hosts IOCG deposits and several Cu-Au-Bi-Co deposits and the Explorer 108 Zn-Pb-Ag deposit. Minimum age from intrusive relationship with Tennant Creek Granite, and Max.dep. age from White Devil|Tuffaceous arenite/wacke ("metagreywacke") and siltstone; shale, including argillaceous banded ironstone ("haematite shale"); slate.|siliciclastic sedimentary rock|||N||27-APR-23
Warramunga Province - moderately magnetic rocks 79897|79897|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Warramunga Province - sediments and volcanics 79934|79934|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments and volcanics.|sedimentary rock|igneous volcanic rock||N||17-JAN-23
Warramunga Province - strongly magnetic rocks 79915|79915|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Warramunga Province - weakly magnetic rocks 79932|79932|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.||||U||17-JAN-23
Warrego Granite|19519|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Devils Suite|30736|Statherian|1645||isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1684|17|isotopic, K/Ar|||||No|29135|60684|||||Tennant Creek / Davenport Province. Intrudes the Flynn Subgroup. See also "Warrego granite".|Equigranular, muscovite-biotite and corundum-bearing, granite/granodiorite; pegmatitic segregations.|acid intrusive rock|||Y|S-type|17-JAN-23
Warrego Volcanics|19520|||||Yes|Formation, beds|Formal|Other new published name|Defined|Ooradidgee Group|39122|Tennant Creek Supersuite|39127|Orosirian|1845|4|inferred, geological correlation|minimum depositional age|Orosirian|1849|5|inferred, geological correlation|eruption|200|550|NT|Yes|33307|35771|Mendum J.R., Tonkin P.C. (per D.E. Gardner)|01-JAN-78|Wells, A.T.|01-FEB-78|Tennant Creek / Davenport Province. Tennant Creek Suite. Defined 1978.  In the Flynn Subgroup. Is this related to the informal 'Warrego Member' of LeMessurier et al (1990)? Undated, but broadly correlated with volcanic rocks of Yungkulungu and Bernborough Formations.|Chert (silicified tuff), tuff; siltstone, shale, fine-grained lithic arenite/wacke.|acid volcanic rock|||N||27-APR-23
Warrs Volcanic Member|24631|||||Yes|Member, phase|Formal|Resvd name published|Defined|Burrell Creek Formation|3134|||Orosirian|1862|3|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|||||||NT|Yes|39679||D.L.Dundas, C.J.Edgoose|18-APR-83|Brakel, A.|08-JAN-85|Within Finniss River Group. See also the misspelt  Warrs Volcanics. Hosts VMS Cu-Zn-Ag deposits in chloritised shear zones.|Submarine acid volcanics; (meta)dacitic lavas; interbedded tuffaceous siltstone and volcaniclastic lithic arenite.|acid volcanic rock|sedimentary rock||N||17-JAN-23
Warumpi Granite|41857|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Illili Suite|41845|Statherian|1639|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|1642|3|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|67565|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|A sample of gneissic Warumpi Granite from the type locality has a SHRIMP U-Pb zircon age of 1642 +/- 3 Ma. A foliated biotite granite from just north of the Kintore road has a SHRIMP U-Pb zircon age of 1639 +/- 3 Ma (Cross et al 2004).|Foliated to gneissic biotite granite with large, rounded K-feldspar phenocrysts up to 3 cm diameter and locally flattened and elongated; local rapakivi texture preserved; has undergone local partial melting.|acid intrusive rock|metamorphosed acid igneous rock||Y||17-JAN-23
Water Tower Tonalite|42258|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Inningarra Suite|41160|Orosirian|1821|4|isotopic, Pb/Pb|intrusion|Orosirian|1840|11|isotopic, U/Pb-Pb/Pb ion probe|||||No|23809||||||Intrudes the Killi Killi Formation. Current 2007. Not to be confused with Water Tower nomenclature of NSW.|Granodiorite.|acid intrusive rock|||Y||17-JAN-23
Waterbag Creek Formation|19573|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Tolmer Group|18275|||Paleoproterozoic|1700|||deposition|Paleoproterozoic|1825|||||500|NT|No|46676||||||Shown as Mesoproterozoic on 2011 Pine Creek map, but Palaeoproterozoic in 2013 Geology and Mineral Resources of the NT.|Dominated by red mudstone and interbedded shale, thinly to medium bedded siltstone, sandstone, dolomitic sandstone and dolostone. Locally contains interbedded ferruginous sandstone, varicoloured siltstone, silicified limestone, marl and siltstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Waterfall Member|84111|Wangalinji Member|38512|||Yes|Member, phase|Formal|Other new published name|Fully described|||||Statherian|||||Statherian||||||750|NT|Yes|||||Munson, T. (NTGS)|01-JUN-23|The rocks of the “Playford Sandstone” and the Wangalinji Member north of the Mitchiebo-Maloney fault have been shown to be older than the rocks of those units south of the fault hence the creation the “Waterfall Member” of the “Fish Hole Sandstone” for the older rocks.|White, thick beds, medium-coarse-grained cross-bedded sandstone, w current ripples, lineations, mudstone intraclasts, pebbly layers. Overlain by laminated shale w thin siltstone, very fine-grained lithic sandstone, med-thick coarse-grained sublithic sst.||||N||07-OCT-23
Wattie Group|19609|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Calymmian|1570|||deposition|Statherian|1610|||||450|NT|No|32699|48943||||| Age: 1610-1570Ma.  Possibly correlated with Nathan Group. Micaceous siltstone, sandstone, minor dolostone in Auvergne area. Birrindudu basin.|Sandstone, siltstone, claystone, dolostone, chert, conglomerate.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Wauchope Subgroup|24565|||||Yes|Subgroup|Formal|Resvd name published|Defined|Hatches Creek Group|8139|||Statherian|1790||inferred, geological correlation||Orosirian|1820||inferred, geological correlation|||4000|NT|Yes|39900|49033|A.J.Stewart|21-OCT-83|Brakel, A.|16-FEB-84|Correlates with part of the Tawallah Group (McArthur Basin). In Davenport province/Tennant Creek Inlier.  Age: >1660Ma. Intruded by Treasure Suite.|Lithic and/or feldspathic arenite, quartz arenite, and pebbly arenite which are commonly cross-bedded; felsic volcanics and basalt; minor slate, siltstone, limestone, dolostone.|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Wauchope Subgroup, Lower|39130|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Wauchope Subgroup|24565|||Orosirian||||deposition|Orosirian||||||||No|23733||||||Informal unit used for cartographic purposes on regional scale maps. Includes Unimbra Sandstone, Gwynne Sandstone,  Yeeradgi Sandstone, Arabulja Volcanics, Newlands Volcanics,  Strzeleckie Volcanics, Tinfish Sandstone.  Age: ~1780Ma.|Felsic volcanic rocks, subarkosic and sublithic, volcaniclastic/tuffaceous arenite, siltstone and shale;|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Wauchope Subgroup, Upper|39131|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Wauchope Subgroup|24565|||Orosirian||||eruption|Orosirian||||||||No|23733||||||Informal name used for cartographic purposes on regional maps.  Includes Kudinga Basalt, Coulters Sandstone, Frew River Formation|Basaltic lava; feldspathic/lithic arenite and quartz arenite; siltstone, feldspathic/lithic arenite, mudstone, limestone and dolostone; stromatolites; quartz arenite, feldspathic/lithic arenite; minor siltstone and altered mafic lava|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Weaber Group|19643|||||Yes|Group, Suite|Formal|Other new published name|Redefined|||||Serpukhovian|||inferred, overlying unit|deposition|Tournaisian|||inferred, biostratigraphic correlation|||2400||No|44965|61542|||||Of Mory and Beere (1988). See also Lexicon. ?Defined 1966. Stratigraphy revised by Gorter et al (2005) - see APPEA Journal 45/1. Group may now be non-current?? But name used by NTGS in 2006 Auvergne map & 2013. Originally included Point Spring Sandstone as the topmost unit; since assigned to the Wadeye Group by Gorter et al. (2005). Latest Tournaisian to early Serpukhovian age.|Quartz sandstone, siltstone, shale, minor limestone and conglomerate. Shoreface, deltaic and fluvial deposits.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Weaner Sandstone|26206|||||Yes|Formation, beds|Formal|Other new published name|Defined|Bullita Group|2914|||Calymmian||||deposition|Calymmian|1600|24|isotopic, U/Pb-Pb/Pb ion probe||3|179|NT|No|28255|48943|||||Not related to Weaner Vale Granite in Qld. SHRIMP U-Pb detrital zircon age: Carson (2013).|Thinly to thickly cross-bedded sandstone and minor polymictic pebble conglomerate that contains rare oolitic grainstone (?from Banyan Formation) and clasts of volcanic rock.|siliciclastic sedimentary rock|||N||17-JAN-23
Weberra Granite|19658|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Fiery Suite|38573|Statherian|1698|24|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1711|3|isotopic, U/Pb-Pb/Pb ion probe||||QLD|No|44271|44989|||||Mount Isa Province. Age of unit 1698 +21/-28 Ma. In Geology of Queensland 2013, p59.|Medium to coarse granite, leucogranite, medium graphic granite.|acid intrusive rock|||Y|A-type|17-JAN-23
Weldon Metamorphics|73949|Weldon metamorphics|27071|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Orosirian|1868||isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1879||isotopic, U/Pb-Pb/Pb ion probe|||||No|24540|||||||Sillimanite-oligoclase-garnet-orthoclase-cordierite-quartz gneiss, sillimanite-garnet-biotite-cordierite granofels, sillimanite-biotite-cordierite granulite, garnet-plagioclase-sillimanite-biotite-orthoclase-cordierite-quartz granulite, amphibolite|high grade metamorphic rock|||U||17-JAN-23
Welltree Metamorphics|19716|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Cosmo Supergroup|72987|||Orosirian|1860|||deposition|Orosirian|1865|4|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|39803||Pietsch B.A.|01-JAN-84|Brakel, A.|15-NOV-84|Age: 1865 +/-4 Ma  is a U-Pb SHRIMP maximum depositional age for the sedimentary protolith to this unit. SHRIMP U-Pb monazite age of 1813+/-3 Ma dates metamorphism. Possibly intruded by Keri Metamorphics. Hosts the Labelle Zn-Ta-Nb pegmatite deposit.|Quartz-feldspar-biotite gneiss, commonly containing garnet and sillimanite; quartzitic gneiss; quartzite, minor quartz-feldspar-muscovite gneiss.|high grade metamorphic rock|||N||17-JAN-23
Wessel Group|27928|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Ediacaran|550|||deposition|Neoproterozoic|800|||||2300|NT|No|44338|43010||||||Sandstone, calcareous or dolomitic in part; micaceous mudstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
West Branch Volcanics|19780|||||Yes|Formation, beds|Formal|Other new published name|Defined|Katherine River Group|9312|Fagan Supersuite|31308|Statherian|1705|16|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Statherian|1720|7|inferred, underlying unit|||2000|NT|No|44471|44400|||||Age: 1712-1705 Ma. Formerly included in the Diljin Hill Formation.|Poorly sorted fine to very coarse sandstone, vesicular mafic volcanics; minor polymict conglomerate lenses, claystone, siltstone, quartz-feldspar porphyry.|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
West Branch Volcanics - basalt|72363|||||Yes|Member, phase|Informal|Variation of published name|Described|West Branch Volcanics|19780|||Statherian|1705|||eruption|Statherian|1712|||||||No|||||||Lithology referring to an informal unnamed unit of the West Branch Volcanics to be used for Northern Territory 1:1 million geological map, National Maps Project.|Strongly altered, fine grained, rarely porphyritic, massive to vesicular and amygdaloidal, commonly brecciated lavas of mainly basaltic composition; interbeds of fine to coarse and pebbly, quartz-rich to ferruginous and lithic sandstone|basic volcanic rock|||N||17-JAN-23
West Branch Volcanics - sandstone|72386|||||Yes|Member, phase|Informal|Variation of published name|Described|West Branch Volcanics|19780|||Statherian|1705|||deposition|Statherian|1712|||||||No|||||||Lithology referring to an informal unnamed unit of the West Branch Volcanics to be used for Northern Territory 1:1 million geological map, National Maps Project.|Ferruginous, fine to coarse grained, sublithic, micaceous sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
Westmoreland Conglomerate|19842|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Tawallah Group|17902|||Statherian|||inferred|deposition|Statherian|1843|4|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age|1200|1900|QLD|No|44272|45162|||||Maximum depositional age; this is younger than that determined for the overlying Carolina Sandstone Member (Seigal Volcanics) (1863+/-6 Ma). Hosts uranium mineralisation near contact with overlying Seigal Volcanics. A detrital zircon max depositional age of 1815+/-14 Ma has also been obtained for this unit, but it is unclear what stratigraphic level this sample came from.|Siltstone, conglomerate and talus breccia, sandstone; pebble and cobble conglomerate, sandstone; boulder and cobble conglomerate, greywacke, sandstone; conglomerate, sandstone, greywacke, siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Westwood Formation|68831|Westwood Member|19851|||Yes|Formation, beds|Formal|Variation of published name|Described|Cockatoo Group|4273|||||||deposition|||||||||No|60682||||||Interfingers with Kellys Knob Sandstone.|Limestone.|carbonate sedimentary rock|||N||17-JAN-23
Whippet Sandstone Member|26998|||||Yes|Member, phase|Formal|Variation of published name|Fully described|Bernborough Formation|1514|||Orosirian|1845|4|inferred, overlying unit|deposition|Orosirian|1853|5|inferred, underlying unit|||||No|48891||||||Within the Ooradidgee Group.|Lithic arenite and siltstone, shale; granule conglomerate.|siliciclastic sedimentary rock|||N||27-APR-23
Whistleduck Dyke Swarm|68351|||||Yes|Formation, beds|Informal|Structural term|Briefly described|||||Neoproterozoic||||intrusion|Neoproterozoic||||||||No|69427||||||Structural term.  Invalid use as a stratigraphic term, but retained until a new name (eg; Whistleduck Dyke Suite) is published.|A swarm of E-trending dolerite dykes composed of mafic amphibolites.|basic intrusive rock|||Y||17-JAN-23
White Mountain Formation|19898|White Mountain Series""|19900|||Yes|Formation, beds|Formal|Other new published name|Defined|||||Middle Miocene||||deposition|Early Miocene||||||120|WA|No|44317|41864|||||See also Lexicon.|Fossiliferous chert, siltstone, sandstone, marl.|non-carbonate chemical or biochemical sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
White Violet Orthogneiss|80339|Mascotte Gneiss Complex|26019|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Casper Suite|80344|Statherian|||||Statherian|1793.9|6|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|71621||Beyer, E. (NTGS)|29-NOV-17|Munson, T.|15-NOV-18|Formerly part of the Mascotte Gneiss Complex. Scheduled to be published in early 2018 in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin.|Granodioritic gneiss with rare monzodioritic and quartz monzodioritic gneiss: fine to medium-grained, equigranular to rarely porphyritic, leucocratic with minor biotite, rare hornblende and clinopyroxene assemblages; foliated to gneissic.|metamorphosed acid igneous rock|||Y|I-type|17-JAN-23
Whites Formation|24572|Whites Member|19923|||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Partridge Group|13012|||Orosirian|2019|4|inferred, overlying unit|deposition|Siderian|2500|||||1000|NT|Yes|39069||P.G.Stuart-Smith|17-JAN-80|Brakel, A., Abell, R.|31-MAY-82|Defn card for Whites Formation. Published as Whites Member and Whites Formation 83/23944. Replaces Masson Formation in Rum Jungle Area. See also misspelt White's Formation.Hosts several Pb-Zn-Sb amd Cu-Co-Ni-U deposits. The Cu deposits are generally sediment hosted chalcopyrite in carbonaceous shale. U deposits are unconformity related|Calcareous and carbonaceous pyritic mudstone/siltstone, dolomitic mudstone, rare quartzite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Whitewater Volcanics|19928|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Paperbark Supersuite|31788|Orosirian|1849|6|isotopic, U/Pb-Pb/Pb ion probe|eruption|Orosirian|1857|4|isotopic, U/Pb-Pb/Pb ion probe|||1200|WA|No|44317|45047|||||Variously considered as part of Lamboo Complex, Hooper Complex, Bow Supersuite. Part also mapped as Castlereagh Hill Porphyry. Intruded by Mount Christine Granitoid and Paperbark Supersuite. Closely related to Paperbark Supersuite. Indistinguishable crystallisation ages for Paperbark Supersuite, Whitewater Volcanics and related intrusions.|Thick-bedded, massive fine- to medium-grained quartz-feldspar rhyolite to dacite porphyry and welded ignimbrite; minor agglomerate, lapilli tuff, dacitic and rhyodacitic ash-flow tuff, and volcaniclastic sedimentary rock, minor siltstone interbeds.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Whittington Range Member|30740|Whittington Range Volcanics|25621|||Yes|Member, phase|Formal|Variation of published name|Fully described|Hayward Creek Formation|8199|||Statherian||||deposition|Statherian||||||||No|43223||||||Formerly defined as Whittington Range Volcanics by Donnellan et al (1995). Parts previously mapped as Helen Springs Volcanics. Within the Tomkinson Creek Group.|Vesicular andesitic lava; mudstone, siltstone; chertified calcareous siltstone, sandstone; stromatolites|intermediate volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Whitula Formation|19936|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Pliocene||||deposition|Oligocene||||||220|QLD|Yes|33078|64047|Senior B.R.||Playford, G.|07-JUN-74||Sandstone, siltstone, mudstone, and claystone, oxidised; minor gypsum and immature silcrete.|siliciclastic sedimentary rock|||N||17-JAN-23
Whitworth Quartzite|19939|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Myally Subgroup|13635|||Statherian|1650|||deposition|Statherian|1768|8||||2000|QLD|Yes|30529|30534|Derrick G.|21-APR-75|Staines, H.R.E.|18-MAR-76|Defined as Precambrian but subsequently presented as Mesoproterozoic.|Massive medium- to coarse-grained feldspathic to quartzose sandstone; fine-grained, purple or pink, (well-sorted) sandstone; and mudflake conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Wickham Formation|26213|||||Yes|Formation, beds|Formal|Other new published name|Defined|Wattie Group|19609|||Calymmian||||deposition|Statherian|1639|16|isotopic, U/Pb-Pb/Pb ion probe||315||NT|No|28255|48943|||||Unconformably overlies Killaloc Formation; progressively overlies younger formations of Limbunya Group from east to west.  As basal unit of Wattie Group, max age must match Wattie Group max age. Birrindudu Basin. Not to be confused with informal nomenclature for Wickham metamorphic rocks in Tasmania, or with WA's Wickham Pillow Basalt.|Massive quartz sandstone, micaceous siltstone and laminated and brecciated chert, basal conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Wickstead Creek beds|24573|||||Yes|Formation, beds|Informal|Resvd name published|Defined|Reynolds Range Group|16061|||Paleoproterozoic|||||Paleoproterozoic|1773|4|isotopic||||NT|Yes|48992|48992|A.J.Stewart|20-JUN-74|Wells, A.T.|12-NOV-76|Geological Province: Arunta Block (division 2). See also Wickstead Creek Beds. Unit was correlated (Stewart et al. 1984) with most of Lander Rock Formation, but now [2008] considered more likely to belong to Reynolds Range Group.|Calc-silicate rock, marble, gneiss, schist; quartzite, sillimanite gneiss, quartzofeldspathic gneiss; quartz-rich metasediments, quartzofeldspathic gneiss|high grade metamorphic rock|||N||17-JAN-23
Widdallion Sandstone Member|27305|||||Yes|Member, phase|Formal|Resvd name published|Defined|Lawn Hill Formation|10261|||Statherian||||deposition|Statherian|1606|7||||550|QLD|Yes|37459|37459|I.P.Sweet|07-JAN-80|Whitaker, W.|24-JUL-81|See also Widdallion Sandstone. Shown as included in both the Wide and Doom supersequences.|Reddish-brown, flaggy to blocky, fine- to medium-grained ferruginous,micaceous, feldspathic sandstone;brown to purple siltstone interbeds.|siliciclastic sedimentary rock|||N||17-JAN-23
Wide Supersequence|40576|||||Yes|Supergroup|Sequence stratigraphy|Sequence strat published|Described|||||Calymmian|||||Calymmian|1595||inferred, underlying unit|maximum depositional age||||No|70897||||||Black shale units host the supergiant Century stratiform Zn-Pb-Ag deposit. Shows rapid thickness and lithofacies variations across regional fault systems. Includes part of the Lawn Hill Formation.|Grey to brown, siltstone and shale, tuffaceous siltstone and sandstone, feldspathic, micaceous sandstone and siltstone interbeds, minor dolomite.|siliciclastic sedimentary rock|||N||17-JAN-23
Wiernty Formation|38408|Tomkinson Creek beds|18320|||Yes|Formation, beds|Formal|Resvd name published|Defined|Renner Group|38406|||Ectasian||||deposition|Ectasian||||||500|NT|No|24304|24303|||||Reserved as Wiernty (Hussey, 1996). Previously mapped as undifferentiated Tomkinson Creek beds. Age: 1500? Ma.|Sandstone; lithic to quartz arenite; lensing, very thin to medium bedded, very fine to medium grained; micaceous; mudstone, granule conglomerate; silicified dolomitic mudstone; rip-up clasts; ripple cross laminated,halite pseudomorphs; cauliflower chert.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Wild Cow Subgroup|37739|||||Yes|Subgroup|Formal|Resvd name published|Defined|South Nicholson Group|17123|||Calymmian||||deposition|Calymmian||||||4500|NT|Yes|24442||Rawlings, D.|22-NOV-02|Kruse, P.D.|11-APR-05|To be used in Lawn Hill Platform and South Nicholson Basin area. Mount Drummond 1:250 000 map sheet area.|Fine to very coarse grained and pebbly quartzose to lithic sandstone and conglomerate, lithic micaceous siltstone, ferruginous sandstone, shale, claystone; minor chertified stromatolites, ironstone, carbonates|siliciclastic sedimentary rock|||N||17-JAN-23
Wildman Siltstone|24105|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Mount Partridge Group|13012|Gerowie Suite|31730|Orosirian|1890|||deposition|Orosirian|2029|12|isotopic, U/Pb-Pb/Pb ion probe|||2000|NT|No|38239||Needham, R.S.|31-JAN-78|||Intruded by Zamu Dolerite and by Cullen Supersuite. See also misspelling: Wildman Sandstone. Hosts gold deposits. Hosts the Billycan, Jessops and Mount Masson Sn vein deposits. Minimum age from 1993 reference.|Laminated silty carbonaceous phyllite (metasiltstone), interbedded with sandy ferruginous laminated metasiltstone, thinly bedded feldspathic quartz meta-arenite, quartzite, lithofeldspathic metagreywacke. In part tuffaceous.|metasedimentary siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Wilgunya Subgroup|20031|||||Yes|Subgroup|Formal|Unknown or process pending|Briefly described|Rolling Downs Group|16267|||Cenomanian|||inferred|deposition|Lower Cretaceous|||inferred|||||No|29591||||||Constituent unit Wallumbilla Formation also used in Surat Basin. Unclear if Wilgunya Subgroup is used in Surat Basin.|Fossiliferous mudstone, minor labile, glauconitic and quartzose sandstone, siltstone, limestone, calcareous concretions common.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Willieray Formation|38415|Willieray|30260|||Yes|Formation, beds|Formal|Resvd name published|Defined|Namerinni Group|38414|||Statherian|1640|||deposition|Statherian|1640|||||400|NT|No|24304|24303|||||Reserved as Willieray (Hussey, 1996). Previously mapped as undifferentiated Tomkinson Creek beds (Randal et al 1966, Randal and  Brown 1969)|Sandstone; thin to medium bedded; rippled; mudstone, rip-up clasts, ripple cross laminated, current lineated, desiccated, halite pseudomorphs; conglomerate, crossbedded, graded; basal dolomitic sandstone; flaggy, strike ridges.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Wills Creek Granite|20124|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Kalkadoon Supersuite|30638|Orosirian|1830|||intrusion|Orosirian|1860||||||QLD|Yes|46962|49009|D.H.Blake, R.J.Bultitude|08-MAR-78|Whitaker, W.|10-DEC-80|Part of the Kalkadoon Batholith. Mapped as Argylla Formation and Kalkadoon Group (Carter and Opik, 1963). Min. age: 1830Ma (Wyborn and Page, 1983).|Medium to coarse biotite granite and leucogranite; minor aplite.|acid intrusive rock|||Y||17-JAN-23
Wilson Formation|38834|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Ware Group|38831|||Orosirian|1791|66||deposition|Orosirian|1815|13|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000||No|62377||Crispe, A.|06-AUG-03|||More recent 2007 age information: detrital zircons in greywacke give maximum deposition age: ca.1831+/-7Ma (in RefID: 64662).|Greywacke, quartzwacke, granule conglomerate, phyllitic siltstone, fine-grained schist.|siliciclastic sedimentary rock|||N||17-JAN-23
Wilton package|81655|||||Yes|Supergroup|Informal|Sequence strat published|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|72373||||||Includes Roper Group, McArthur Basin; Renner Group Tomkinson Province and Tijunna Group, Birrindudu Basin. .Mainly contains shallow-water siliciclastic sedimentary rocks.|||||N||17-JAN-23
Windajong Granite|72416|Windajong|39110|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Statherian|1730|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Statherian|||||||NT|Yes|62642||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.|||Biotite-muscovite granite, equigranular/seriate porphyritic|acid intrusive rock|||Y||17-JAN-23
Windoo Sandstone|30320|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Lower Ordovician||||deposition|Late Cambrian||||||50|WA|Yes|43302|23621|Blake D.H.|21-JUN-96|Hocking, R.|22-APR-99|East Kimberley.  Replaces parts of the Gardiner beds on Gordon Downs 250K.  Note: Extensive Gardiner still exists in NT and other parts of WA.|Quartz sandstone, minor mudstone, dolomite, stromatolitic chert|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Winnall Group|79223|Winnall beds|20249|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Cambrian|||inferred, geological correlation||Ediacaran|||inferred, geological correlation||1524|2154|NT|Yes|70416||Normington, V.J. , Donnellan, N.(NTGS)|01-SEP-15|Williams, B., Normington, V.|09-MAR-17|Map Sheet=HENBURY SG53-1. To be elevated from Winnall beds. To be published=2nd Edition Henbury 250K geology map and associated explanatory notes, release 2018.|Sandstone: feldspathic, subarkosic, arkosic and quartz arenite; and siltstone.Includes thinly bedded to flaggy, fine grained micaceous sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Winnecke Granophyre|20256|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||Birthday Suite|38833|Orosirian|1802|5|isotopic, Rb/Sr|intrusion|Orosirian|1815|5|isotopic, U/Pb-Pb/Pb ion probe||||NT|No|44965|45140|||||Tanami Province.  See also "Winnecke Granophyre". Name still in use 2007. Intrudes Ware Group. See also Winnecke Monzogranite. Variably assigned to the Birthday Suite (2007), Granites Supersuite (obsolete), or Winnecke Suite (2001, superseded by Birthday Suite).|Biotite-bearing syenogranite, monzogranite, including minor quartz-feldspar porphyry, quartz-phyric rhyolite.|acid intrusive rock|||Y||17-JAN-23
Winton Formation|20268|Winton Series|33253|||Yes|Formation, beds|Formal|Variation of published name|Defined|Manuka Subgroup|11215|||Cenomanian||||deposition|Albian|||||400|1200|QLD|No|44269|69946|||||Of Whitehouse (1955). See also Eyre Formation. See also Lexicon. Neales River Group (see Strzelecki 1:250k map (1994) and explan notes (1995)). Within the Rolling Downs Group. One of the two main groundwater resources in the Great Artesian Basin. Type section was designated in Queensland by Whitehouse (1955). The type section is described as "blue shales and sandstones with intercalated coal seams met within the bores in and around Winton". (reported in Cotton et al., 2007).|Lithic and feldspathic sandstone, mudstone, siltstone, minor conglomerate; local coal, lignite and volcanic detritus.|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock|intracratonic|N||13-SEP-23
Wire Creek Sandstone|20288|Westmoreland Conglomerate|19842|||Yes|Formation, beds|Formal|Other new published name|Defined|Tawallah Group|17902|||Statherian||||deposition|Statherian|1847|13|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||70|QLD|Yes|46804|49001||01-DEC-75|Staines, H.R.E.|24-JUN-76|Geology of Queensland 2013, p58 includes this unit in the Tawallah Group and gives a maximum depositional age of 1847+/-13 Ma.|Coarse gritty sandstone with scattered quartz pebbles; cobble and boulder conglomerate lenses|siliciclastic sedimentary rock|||N||17-JAN-23
Wiso Basin - limestone, clastic sedimentary rocks 80288|80288|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cambrian|||inferred||Cambrian|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Limestone, clastic sedimentary rocks.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Wiso gravel|20312|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||||||deposition|||||||||No|31429||||||Formal name would be Wiso Gravel.|||||N||17-JAN-23
Witch Wai Conglomerate|27010|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Paleozoic||||deposition|Early Cambrian||||||||No|46676|||||||Conglomerate.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Withillindarmna Dolostone Member|20318|||||Yes|Member, phase|Formal|Other new published name|Briefly described|||||Ordovician||||deposition|Ordovician||||||||No|40136|||||||Sandy dolostone.||||N||17-JAN-23
Wolfram Hill Granite|20353|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Tennysons Suite|31732|Orosirian|1800|||intrusion|Orosirian|1850|||||||No|46678||||||See also Lexicon.  Of the Cullen Supersuite. Intrudes Finniss River Group.|Pink, medium to coarse equigranular biotite leucogranite; grey, fine, equigranular leucogranite.|acid intrusive rock|||Y||17-JAN-23
Wollogorang Formation|20358|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Tawallah Group|17902|||Statherian|1723|4|isotopic, U/Pb-Pb/Pb ion probe|deposition|Statherian|1730|3|isotopic, U/Pb-Pb/Pb ion probe|||150|NT|No|44272|45162|||||Defn on Tech File E/53-8. Correlated with upper part of Katherine River Group. Includes evaporite mineral casts in some areas, eg Wallhallow 1:250 000 sheet area.|Two facies mapped separately. Dolomitic sandstone, dolomite, stromatolitic dolomite, oolitic dolomite; dolomitic and quartz sandstone, ferruginous in parts, feldspathic, dolomitic siltstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Wonarah Formation|69133|Wonarah beds|25643|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Barkly Group|32954|||Middle Cambrian|||biozone|deposition|Middle Cambrian|||biozone||15|300|NT|Yes|62657|64443|||Kruse, P.D.|07-JUN-05|Revised definition (PD Kruse, after Öpik (1956b) - 07-JUN-2005) of Wonarah beds (Öpik 1956b). Redefined (Kruse and Radke 2008) to include former Alexandria, Alroy Downs, and Burton beds: see also RefID 65337 Rawlings et al. (2008). Hosts major phosphate deposits.|Chertified limestone and mudstone, dolostone (silty dolostone, dolosparstone, calci/dolomudstone-siliciclastic mudstone interbeds); siliceous concretions; minor intraclast and bioclast wacke- to grainstone, oncoid pack- to grainstone, siltstone and sands.|carbonate sedimentary rock|fine grained siliciclastic rock|continental rift|N||17-JAN-23
Wondoan Hill Formation|20428|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tijunna Group|35323|||Mesoproterozoic||||deposition|Mesoproterozoic|||||30|145|NT|No|28255|70968|||||Previously included in the Victoria River Group of Traves (1955) and Coolibah Formation of Laing & Allen (1956). Birindudu Basin. See also the misspelt Wandoan Hill Formation, Wondoan Hills Formation. Type area is no longer accessible [noted in 2016].|Glauconitic quartz sandstone, claystone, siltstone, shale, mudstone; minor dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||07-SEP-23
Wonga Gneiss|81653|Wonga Orthogneiss|79872|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Orosirian|1864|6||metamorphism|Orosirian|1880|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|72365||||||See also Wonga Orthogneiss. Unclear which name is preferred.|Fine- to medium-grained, porphyritic, garnet-biotite gneiss.|metamorphic rock|||Y||17-JAN-23
Wonga Orthogneiss|79872|Wonga gneiss|80540|||Yes|Formation, beds|Formal|Resvd name published|Described|||Nhulunbuy Suite|80477|Orosirian|1877||inferred, structural relationship||Orosirian|1880|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|71605||Whelan, J. (NTGS)|20-JUN-17|||Map sheet: Gove 6273. Garnet-cordierite-biotite  /- sillimanite orthogneiss, contains rare xenoliths. To be published =  in the Gove Special 1:100 000 explanatory notes. See also Wonga Gneiss. Unclear which name is preferred.|Garnet-cordierite-biotite  /- sillimanite orthogneiss, contains rare xenoliths.|metamorphosed acid igneous rock|||Y||17-JAN-23
Wonnadinna Dolostone|42196|Wonnadinna Dolomite|20459|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Keepera Group|9375|||Ediacaran|||inferred, geological correlation|deposition|Ediacaran|||inferred, geological correlation|||460|NT|No|24442||||||Defined as Wonnadinna Dolomite. Dolostone is now the preferred term.|Purple-red to yellow-brown and green-grey dolostone, quartzic dolostone; interbedded more or less dolomitic arkose, siltstone and shale. Dolostone bears oncoids, fenestrae and possible columnar stromatolites.|carbonate sedimentary rock|||N||17-JAN-23
Woodah Sandstone|23244|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Alyangula Subgroup|21122|||Statherian||||deposition|Statherian|1730||inferred, lithostratigraphic correlation|deposition||60|NT|Yes|43292|22808|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|||Within the Groote Eylandt Group. Kositcin et al., 2015b reported SHRIMP U-Pb zircon maximum depositional age of 1815+\-13 Ma.|Pebble to boulder conglomerate, medium-grained quartz sandstone, minor red-brown micaceous mudstone|siliciclastic sedimentary rock|||N||17-JAN-23
Woodalla Member|72422|Mount Stafford beds|27090|||Yes|Member, phase|Formal|Resvd name published|Defined|Lander Rock Formation|69780|||Orosirian||||deposition|Orosirian|1866|3|inferred|maximum depositional age|||NT|Yes|62642||Donnellan, N. (NTGS)|21-FEB-07|Kruse, P.D.||Together with Mount Stafford Member - both are of the former Mount Stafford beds. Maximum depositional age from detrital zircons.|Interbedded sandstone/wacke and micaceous siltstone/slate/phyllite/schist; laminated, graded and cross-bedded.|siliciclastic sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Woodbine Group|20481|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Pleistocene|||||Paleocene||||||800||No|42056||||||Replaced by Brown Gannet Limestone? NO this Group is younger than Brown Gannet Lst. Maybe reinterp in one well? See Woodbine Beds. [CEBJun95]. Still current as at 2013.|Coarse, quartzitic sandstones with claystone interbeds, and minor coal and dolomite overlain by calcareous claystone and marl with calcarenite interbeds.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Woodcutters Supergroup|72988|||||Yes|Supergroup|Formal|Resvd name published|Described|||||Orosirian|2019|4|inferred, lithostratigraphic correlation|magmatic crystallisation|Orosirian|2035||inferred, lithostratigraphic correlation|deposition||||No|67355||||||Name from AGES 2007 record of Abstracts. Requested by O.Raymond (HG 2007). Depositional age ca. 2020 Ma, constrained by U-Pb zircon dating of interlayered felsic volcanic rocks (Worden et al., 2008b). Maximum depositional age from detrital zircons ~2506 Ma.|Arenites, stromatolitic dolostone and pyritic carbonaceous shale. Interlayered with felsic volcanics.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Wooden Duck Member|20494|||||Yes|Member, phase|Formal|Other new published name|Defined|Mainoru Formation|11034|||Calymmian|1493|4|inferred, overlying unit|deposition|Calymmian|1492|4|isotopic, U/Pb-Pb/Pb ion probe||56|350|NT|No|44434|23937|||||Identified as the wood sequence by Abbott and Sweet (2000) in their sequence stratigraphy interpretation of the Roper Group. Age: >1493+/-4 Ma. Within the Roper Group. Can be difficult to distinguish from Showell Member (Smith, 2016).|Dominantly mudstone interbedded with very fine- to rarely medium-grained, commonly micaceous and glauconitic sandstone that increases in frequency up-section. Rare limestone or dolostone in middle part.conitic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Woodenjerrie beds|76081|Woodenjerrie Beds|69783|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Orosirian|1840|4|inferred, overlying unit|minimum depositional age|Orosirian|1864|4||||||No|65209||||||Includes former Warramunga Group rocks mapped by Smith (1964), reassigned by Donnellan (2004).|Interbedded phyllitic siltstone and fine-grained greywacke; porphyritic felsic lava.|medium-coarse grained siliciclastic rock|acid volcanic rock||N||23-FEB-23
Woodenjerrie beds - felsic volcanics|72691|||||Yes|Member, phase|Informal|Variation of published name|Described|Woodenjerrie beds|76081|||Orosirian||||deposition|Orosirian||||||||No|||||||Unit used for Northern Territory 1:1 million geological map, National Maps Project.|Felsic volcanic and subordinate clastic sedimentary rocks|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Woodforde River beds|24584|Woodforde River Beds|40025|||Yes|Formation, beds|Informal|Resvd name published|Defined|Reynolds Range Group|16061|||Paleoproterozoic|1780||||Paleoproterozoic|1820||||||NT|Yes|48992|48992|A.J.Stewart|20-JUN-74|Wells, A.T.|12-NOV-76||Metamorphosed sandstone and siltstone, pelitic schist, minor calcareous rocks and metabasalt.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||17-JAN-23
Woodgreen Granite Complex|28280|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Statherian||||intrusion|Statherian|||||||NT|Yes|33103||Shaw R.D., Warren R.G.|06-MAY-74|Strusz, D.L.|24-JUN-74|Intrudes the Delny Gneiss.|Coarse-grained, porphyritic, garnet-bearing granite; garnet-bearing, gneissic granite, migmatite; fine to medium-grained, equigranular, garnet-bearing granite; dark coarse grained, porphyritic biotite granite interlayered with leucocratic granite|acid intrusive rock|||Y||17-JAN-23
Woola Downs Granite|77814|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Orosirian||||magmatic crystallisation|Orosirian|1805|6|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|69917||Beyer, E. (NTGS)|13-FEB-13|||Medium-grained biotite-rich quartz monzonite. It intrudes the Lander Rock Formation and has a magmatic age of 1805 Ma. To be published in the upcoming "Beyer EE, Edgoose CJ, Vandenberg LC and Webb GP, 2013. Alcoota, Northern Territory. 1:250 000 geological map series explanatory notes, 5310. Northern Territory Geological Survey, Darwin.". This unit is not related to the (now obsolete) Woolla Gneiss.|Strongly altered granite with large relict igneous feldspar phenocrysts (>2 mm across, most likely K-feldspar) that are extensively replaced by epidote and zoisite.|acid intrusive rock|||Y||17-JAN-23
Woolaston Formation|20549|||||Yes|Formation, beds|Formal|Other new published name|Described|Bathurst Island Group|1249|||Turonian||||deposition|Cenomanian||||||||No|42053||||||Age: ~95-~86Ma [in 2001].|Pelagic marl, hemipelagic marl, limestone.|carbonate sedimentary rock|||N||17-JAN-23
Woolianna Gabbro|75946|Woolianna Suite|75720|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian|1855||inferred, intrusive relationship|intrusion|Orosirian|1860||inferred, intrusive relationship||||NT|Yes|67232|67232|Glass, L. (NTGS)|12-MAY-11|Munson, T., Glass, L., Beyer, E.|03-NOV-10|Formerly included in Wangi Basics.|metamorphosed medium- to coarse-grained, variably altered, equigranular rocks which include gabbro, hypersthene gabbro and microgabbro to coarse-grained dolerite; metaperidotite, metapyroxenite, metaharzburgite, amphibolite, metadolerite and metabasalt.|basic intrusive rock|metamorphosed basic igneous rock||Y||17-JAN-23
Woolner Granite|24634|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Neoarchean|2674|3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Neoarchean|2675|15|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|39679||B.A.Pietsch|14-DEC-83|Brakel, A.|15-NOV-84|Central Domain, Pine Creek Orogen. Basement to Palaeoproterozoic succession. Coeval with Njibinjibinj Gneiss. Age refined  in 2009/10 - see Definition for references.|Three granite varieties: foliated and gneissic, red-brown and grey, albitised biotite granite; grey muscovite-biotite granite; pink muscovite-biotite-orthoclase granite. Pegmatite intrusions are more common in the gneissic variety.|acid intrusive rock|||Y|I-type|17-JAN-23
Wuluma Granite|20664|Wuluma Granitoid|20665|||Yes|Formation, beds|Formal|Other new published name|Described|Strangways Metamorphic Complex|17395|Wuluma Suite|41833|Statherian||||magmatic crystallisation|Statherian|1728|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|9199||||||An S-type anatectic partial melt of adjacent country rocks. Reported age could reflect inheritance.|Granite; some rafts of sillimanite gneiss, mafic granulite|acid intrusive rock|||Y|S-type|17-JAN-23
Wuluma Suite|41833|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|1726|4|isotopic||Paleoproterozoic|1728|||||||No|69931|||||||||||Y||09-AUG-23
Wundirgi Formation|23268|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Ooradidgee Group|39122|||Orosirian|1827|9|isotopic, U/Pb-Pb/Pb ion probe|deposition|Orosirian|1845|4|inferred, geological correlation||600|3000|NT|No|43751|24172|Donnellan N.|01-SEP-93|Kruse, P.D.|31-DEC-95|Formerly of the Flynn Subgroup. Hosts the Alexandria phosphate deposit.|Sublithic/lithic arenite and siltstone, shale; minor tuff, chert (silicified tuff); rhyolitic lava and ignimbrite, tuff and chert (silicified tuff).|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Wununmantyala Sandstone|27950|Masterton Formation|11440|||Yes|Formation, beds|Formal|Other new published name|Defined|Tawallah Group|17902|||Statherian|1730||inferred, overlying unit|deposition|Statherian|1740||inferred, underlying unit|||520|NT|No|40691|65340|K.A.Plumb|28-APR-83|||Minimum age inferred from overlying Wollogorang Formation.  Basal age inferred and poorly constrained. In Rawlings (2006)[and possibly earlier] rocks previously assigned to the Sly Creek Sandstone on the Wearyan Shelf were reassigned to the Wununmantyala Sandstone.|Red to mauve-grey, locally feldspathic sandstone, mainly med-grained, moderately to well sorted, thin- to med.- bedded.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Wuraliwuntya Member|29229|||||Yes|Member, phase|Formal|Resvd name published|Defined|Wununmantyala Sandstone|27950|||Statherian|1730||inferred, overlying unit|deposition|Statherian|1735||inferred, geological correlation||||NT|Yes|42385|42812|Haines P.W.|28-JUN-90|Kruse, P.D.|24-FEB-94|Minimum age inferred from age of Wollogorang Formation higher in the Tawallah Group|Fine-grained and rarely medium grained sandstone and mudstone; mottled brown to fawn, very thin to medium bedded, typically flaggy.|siliciclastic sedimentary rock|||N||17-JAN-23
Wurugoij Dolerite|24126|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Neoproterozoic||||intrusion|Mesoproterozoic|1200|||||||No|9733||Needham, R.S.|24-JUL-74|||Now considered to be part of Oenpelli Dolerite (1999).|Ophitic dolerite.|basic intrusive rock|||Y||17-JAN-23
Wyworrie Member|80428|||||Yes|Member, phase|Formal|Resvd name published|Defined|Velkerri Formation|19074|||Mesoproterozoic|1312.9|.7|inferred, intrusive relationship|minimum depositional age|Mesoproterozoic|1492|4|inferred, underlying unit|maximum depositional age|88.5|705|NT|Yes|71779|71779|Munson, T.|19-FEB-18|Normington, V.|29-MAY-18|Named for the Wyworrie Station on the Larrimah 250k mapsheet. To be published in [provisional title]: Munson TJ, Revie D  and Edgoose CJ, 2018. Stratigraphic subdivision of Velkerri Formation, Roper Group, McArthur Basin, Northern Territory. Northern Territory Geological Survey, Record. To be released in first half of 2018.|Alternating, interbedded and interlaminated mudstone and siltstone, and lesser fine-grained sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Xanten Granodiorite|80335|Xanten Granite|24128|||Yes|Formation, beds|Formal|Variation of published name|Redefined|||Casper Suite|80344|Statherian|||inferred||Statherian|1777|8|isotopic, U/Pb-Pb/Pb ICP-MS|magmatic crystallisation|||NT|Yes|71621||Beyer, E. (NTGS)|29-NOV-17|Normington, V.|31-OCT-18|Name changed to reflect dominant lithology. To be published in: Beyer EE, Reno BL, Weisheit A and Whelan JA, 2018. Jervois Range Special, Northern Territory. 1:100 000 geological map explanatory notes, 6152 and part 6252. Northern Territory Geological Survey, Darwin.|Granodiorite to tonalite: fine to medium-grained, equigranular, leucocratic comprising quartz-plagioclase with minor K-feldspar, rare biotite and muscovite; strongly weathered and altered (silicified); moderately foliated, locally gneissic.|acid intrusive rock|||Y||17-JAN-23
Yabooma Formation|20737|||||Yes|Formation, beds|Formal|Other new published name|Described|Arafura Group|522|||Famennian||||deposition|Frasnian||||||335||No|42058|||||||Siltstone, dolomite, sandstone, shale.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Yackah beds|20740|Yackah Beds|20739|||Yes|Formation, beds|Informal|Variation of published name|Defined|Plenty Group|37959|||Tonian|||inferred, biostratigraphic correlation|deposition|Tonian||||||250|NT|No|8217|48990|||||Previously part of Field River beds of Smith (1963).|Interbedded fine to very coarse, grey arkose, sandstone and laminated anoxic shale overlain by or interbedded with stromatolitic dolostone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Yaddanilla Sandstone|24590|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Hanlon Subgroup|24304|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Statherian|1816||inferred, underlying unit|maximum depositional age|||NT|Yes|23823|49033|A.J.Stewart, D.H.Blake|13-OCT-81|Brakel, A.|17-FEB-84|Davenport Project.  Within the Hatches Creek Group.|Quartz arenite, feldspathic/sublithic arenite|medium-coarse grained siliciclastic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Yakalibadgi Microgranite|24592|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Napperby Suite|30862|Statherian|1775|||intrusion|Statherian|1780||||||NT|Yes|48992|48992|A.J.Stewart|10-JUL-74|Wells, A.T.|12-NOV-76|Defined as 'Middle Proterozoic'. More recent dating shows it to be Paleoproterozoic.|Porphyritic microgranite, medium-grained granite, muscovite-biotite-feldspar orthoschist.|acid intrusive rock|||Y||17-JAN-23
Yalco Formation|20758|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Batten Subgroup|1257|||Statherian||||deposition|Statherian|1655|17|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||250|NT|No|44434|45162|||||Defn on Tech File E/53-3.  Within the McArthur Group.  Outcrops in central Maria Island. Good potential hydrocarbon source rocks. Top of this unit forms top of River Supersequence of Jackson et al. (2000), so nature of contact with overlying Stretton Formation (which appears conformable) has been questioned. Whole of McArthur Group is within NTGS Glyde package. 1655 Ma age is maximum depositional age from sample near base of unit.|Outcrops as series of white- to buff-weathering benches separated by scree and skeletal soils.  Rock types include: silicified quartz sst., silicified dolarenite and laminated chert.  "Button" stromatolites are characteristic in southern McArthur Basin.|carbonate sedimentary rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Yaloolgarrie Granite|31339|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic|1730||inferred, geological correlation|||||No|43275||||||Correct spelling of place name is Yaloogarrie.  Name was misspelt when first published and misspelt name has been kept as the current name. Mt Doreen 1:250 000 sheet area. Now considered to be older than Southwark Suite, not part of it. See also Wangala Granite.|Megacrystic muscovite-biotite granite with pegmatite, aplite and quartz-tourmaline segregations; weakly foliated|acid intrusive rock|||Y||17-JAN-23
Yalwarra Volcanics|34018|Yalwarra Volcanic Member|20785|||Yes|Formation, beds|Formal|Variation of published name|Defined|Nathan Group|26072|||Calymmian||||eruption|Statherian||||||115||No|22538|23937|||||Formerly the undefined Yalwarra Volcanic Member (Kookaburra Creek Fm) of Dunn (1963c).  Redefined by Jackson et al (1987) as Yalwarra Volc. Mbr. of Balbirini Dolomite - now upgraded and assigned to the Nathan Group.|Vesicular basalt, locally containing sedimentary xenoliths; peperite, lithic sandstone, conglomerate|basic volcanic rock|||N||17-JAN-23
Yam Gneiss|82949|Yam Granodiorite|81821|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|||||Statherian|1736|6|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Orosirian|1797|7|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|||NT|Yes|73123||||Munson, T. (NTGS)|25-AUG-22||Strongly weathered, biotite-bearing quartzofeldspathic gneiss.|foliated metamorphic rock|||Y||02-JUN-23
Yambah Granulite|20788|Yambah granulite|24132|||Yes|Formation, beds|Formal|Other new published name|Fully described|Strangways Metamorphic Complex|17395|||Statherian|||||Orosirian|1802.4|4.8|isotopic, U/Pb-Pb/Pb ion probe|||||No|9199|||||||Felsic granulite, migmatite; some mafic granulite, cordierite granulite, cordierite felsic granulite, quartzite; magnesian-rich rocks|high grade metamorphic rock|||N||17-JAN-23
Yambla Gneiss|79100|Irindina Gneiss|8769|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Harts Range Metamorphic Complex|36822|||Cambrian Series 2|519|9|inferred, intrusive relationship|minimum depositional age|Tonian|964|19|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1000|NT|Yes|69917||||Munson, T. (NTGS)|25-AUG-22|Central and Eastern Arunta Regions, Irindina Province.  U/Pb LA-ICPMS zircon dating, Hf analytical data. 3 samples. Age not well constrained. Previously 'lower Irindina Gneiss'. 1727+/-13 Ma is conservative estimate of maximum 207Pb/206Pb depositional age, but age constraints from underlying units and correlatives indicate deposition after ca 1100 Ma.  Metamorphism during the late phase of the Ordovician Larapinta Event, at 456+/- 6 Ma is also recorded. The 964 +/-19 Ma age is interpreted to be a max dep age from detrital zircons in a quartzite unit.|Transitional granulite-facies metasedimentary rocks with interlayered meta-mafic igneous rocks;  interlayered mafic and felsic orthogneisses and some marble.|high grade metamorphic rock|||N||02-JUN-23
Yaningidjara Orthogneiss|27307|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||Harverson Suite|30858|Statherian|1798|3|isotopic, U/Pb-Pb/Pb ion probe||Orosirian|1806|6|isotopic, U/Pb-Pb/Pb ion probe||||NT|Yes|48992|48992|A.J.Stewart|26-JUL-73|Brown, M.C.|06-MAR-79|Intrudes Lander Rock beds.|Coarse porphyritic granitic augen gneiss with mantled feldspars; some sillimanite-garnet orthogneiss.|high grade metamorphic rock|||Y||17-JAN-23
Yanungbi Volcanics|23289|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Spencer Creek Group|29406|Fagan Supersuite|31308|Statherian|1710|||eruption|Statherian|1712|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||200|NT|Yes|44112|44112|Haines P.W., Pietsch B.A., Rawlings D.J., Madigan T.L.|07-MAR-94|Haines, P.|14-MAR-95|Previously undifferentiated "Spencer Creek Volcanics" of Dunnet (1965).  Age: Palaeoproterozoic (Statherian) -  ~1710 Ma.|Pink to red, aphyric to slightly Kfeldspar-phyric and locally granophyric rhyolite.|acid volcanic rock|||N||17-JAN-23
Yarawoi Formation|29185|||||Yes|Formation, beds|Formal|Other new published name|Defined|Habgood Group|7964|||Statherian||||deposition|Statherian|||inferred|||700|NT|No|42597|43010|||||Age: Statherian. Dated sample (1705 Ma) from the 'medial ridge-forming interval' of the unit.|Red, grey and green mudstone, variably dolomitic; dololutite and silty dololutite; fine- to medium-grained sandstone; stromatolitic chert (silicified carbonate); and dolostone.|siliciclastic sedimentary rock|||N||17-JAN-23
Yardida Tillite|26242|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Aroota Group|37960|||Cryogenian||||deposition|Cryogenian||||||2900|QLD|Yes|8217|48990|Walter M.R.|20-DEC-06|||In Supersequence 2. Age is Adelaidean. Glacigene deposit (Geology of Queensland 2013, p94).|Green-grey diamictite and laminated siltstone; minor fine to very coarse (to pebbly) quartz sandstone and arkose.Locally capped by grey, laminated dolomitic shale and lenticular dolostone.|siliciclastic sedimentary rock|carbonate sedimentary rock|continental rift|N||17-JAN-23
Yaringa Metamorphics|20852|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian|1853|5||metamorphism|Orosirian|1890|8||||||No|34395|44989|||||Do not confuse with Yaringa Formation in Carnarvon Basin (WA).  Deformed and regionally metamorphosed by Barramundi Orogeny. Intruded by Sybella Granite and Little Toby Granite. See also Geology of Queensland 2013, p58.|Quartz - muscovite and quartz - sericite schist and phyllite, quartz - muscovite - biotite gneiss, minor migmatite.|metasedimentary siliciclastic rock|high grade metamorphic rock||N||17-JAN-23
Yarrawirrie Formation|27030|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Calymmian||||deposition|Statherian||||||600|NT|No|44299|43010|||||Formerly of McArthur Group. Max Age: 1620 (+/-) 21 Ma. Stratigraphic position of dated sample within the formation not recorded, but said to be tuffaceous (Pietsch et al. 1994, Haines et al. 1999)|Stromatolitic, nodular, intraclastic dololutite and dolarenite, commonly microbially laminated; silty dololutite; dolomitic sandstone, commonly dolomitic mudstone. Fluvial to shallow-marine polymictic conglomerate at base.|carbonate sedimentary rock|||N||17-JAN-23
Yarrawonga Volcanic Member|24596|Yarrawonga volcanic member|20892|||Yes|Member, phase|Formal|Variation of published name|Defined|Wildman Siltstone|24105|Gerowie Suite|31730|Orosirian||||eruption|Orosirian|1885|||||37|NT|Yes|39069||Pietsch B.A.|16-NOV-83|Brakel, A.|13-DEC-83||Basal ignimbrite  - highly altered, sericitic, acid volcanic with a fragmental texture ; dacite, weakly chloritised; top unit of rhyolite and perlite. See DEFINITION for further lith. detail.|acid volcanic rock|||N||17-JAN-23
Yarunganyi Granite|23298|Mount Doreen granite|12641|||Yes|Formation, beds|Formal|Resvd name published|Described|||Southwark Suite|40018|Calymmian|1567|11|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Calymmian|1567|11|isotopic, U/Pb-Pb/Pb ion probe|||||No|43631||Young D.N.|19-JAN-93|||Mount Doreen area. Of the Arunta Complex. Intrudes Lander Rock beds, Patmungala beds and Reynolds Range Group. Previously known as 'Mount Doreen Granite'.|Megacrystic muscovite-biotite granite.|acid intrusive rock|||Y||17-JAN-23
Yaya Metamorphic Complex|41858|Yaya|36542|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Statherian|1640||inferred, intrusive relationship|deposition|Statherian|1661|10|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age|||NT|Yes|60674|67565|I.R. Scrimgeour, D.F. Close, C.J. Edgoose|05-OCT-04|Kruse, P.D.|05-OCT-04|A massive cordierite granulite has a maximum deposition age of 1661 +/-10 Ma, based on SHRIMP U-Pb dating of detrital zircons. Due to the degree of deformation and metamorphism and heterogeneity of rock types, it is possible that this unit includes rocks of significantly different ages. Interpreted to be a succession of metasedimentary rocks intruded by granite and mafic rocks, metamorphosed to granulite facies|Metapelite, metapsammite, quartzose metasedimentary rocks and quartzite, strained biotite granite, felsic migmatite,massive cordierite granulite,  calcsilicate rock, interlayered mafic granulite and metapelite, mafic amphibolite.|metasedimentary rock|metamorphosed acid igneous rock||N||17-JAN-23
Yeeradgi Sandstone|24597|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Wauchope Subgroup|24565|||Statherian|1790||inferred, lithostratigraphic correlation|deposition|Orosirian|1820||inferred, lithostratigraphic correlation|||800|NT|Yes|39624|49033|Stewart A.J., D.H.Blake|18-NOV-82|Brakel, A.|16-FEB-84|For use in Davenport Geosyncline. Within the Hatches Creek Group (Lower Wauchope Subgroup).  See also misspelling - Yerradji Sandstone.|Subarkosic and sublithic, volcaniclastic/tuffaceous arenite, siltstone and shale; minor felsic volcanic rocks including lava, tuff and cherty ashstone.|medium-coarse grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Yeldham Granite|20928|Weberra Granite|19658|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Yeldham Suite|41336|Statherian|1796|3||intrusion|Orosirian|1820||||||QLD|Yes|36548|36548|Hutton L.J.|08-MAY-80|Whitaker, W.|05-JUN-80|Lawn Hill area. Mount Isa Province. Defined (1980) as Precambrian age. Previously mapped as part of the Weberra Granite.  Age: ~1820Ma. Intrudes the Kamarga Volcanics.  In Geology of Queensland 2013, p32, p60. Age given as 1796+/-3 Ma.|Medium-grained muscovite leucogranite; pegmatite dykes and minor greisen.|acid intrusive rock|||Y||17-JAN-23
Yenberrie Granite|30409|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|43140||||||Probably superseded by Yenberrie Leucogranite.||acid intrusive rock|||Y||17-JAN-23
Yenberrie Leucogranite|24140|||||Yes|Formation, beds|Formal|Other new published name|Described|||Tennysons Suite|31732|Orosirian|1820|||intrusion|Orosirian|1870|||||||No|39679||P.G.Stuart-Smith|30-MAR-83|||Pine Creek Province. Supersedes Yenberrie Granite?  Within the Cullen Supersuite. Intrudes Burrell Creek Formation. Hosts the Yenberrie W-Mo-Bi greisen deposit.|Fine to coarse grained leucogranite, greisen.|acid intrusive rock|||Y||17-JAN-23
Yeuralba Granite|20978|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Jim Jim Suite|30779|Orosirian|1820|||intrusion|Orosirian|1850|||||||No|46679||||||Pine Creek Province. Formerly of the Jim Jim Suite. Intrudes Tollis Formation.|Medium to coarse biotite muscovite leucogranite, tourmaline greisen.|acid intrusive rock|||Y|I-type|17-JAN-23
Yinabalbu Member|69781|||||Yes|Member, phase|Formal|Other new published name|Briefly described|Lander Rock Formation|69780|||Paleoproterozoic||||deposition|Paleoproterozoic||||||||No|61405||||||Age: >1835Ma.|Poorly sorted silty and clayey sandstone and subgreywacke, minor coarse quartzite and slate, faulted and invaded by quartz veins.|siliciclastic sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Yirrkala Formation|23310|Mullaman beds|13380|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Cenomanian||||deposition|Albian||||||50|NT|Yes|43630|43630|Krassay A.|10-JUN-94|Kruse, P.D.|12-JAN-95|BLUE MUD BAY 1:250 000 sheet area. Formerly part of the Mullaman beds. Hosts the Dhupuma and Gove residual bauxite deposits.|White to pale grey, fine to very coarse grained sandstone with massive to thick planar beds, trough cross beds, rare chert pebbles and plant fossils|siliciclastic sedimentary rock|||N||17-JAN-23
Yiyintyi Sandstone|21009|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Tawallah Group|17902|||Statherian|1780||inferred, overlying unit|deposition|Statherian|1800||inferred, underlying unit|||3000|NT|No|44305||||||Defn on Tech File E/53-8. See also the misspelt Yiyinti Formation.  Numeric age estimates are inferred and are poorly constrained (McArthur Basin tectonostrat map, Rawlings, 2001).|Quartz arenite and lesser sublitharenite and litharenite; fine to coarse grained with scattered quartz pebbles and minor conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Your Dam Metamorphics|27634|Your Dam metamorphics|24144|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|48997||||||Probably Orosirian?|Muscovite-quartz-feldspar granofels; schistose gneiss, muscovite-biotite schist|metasedimentary siliciclastic rock|||N||17-JAN-23
Yow Creek Formation|74205|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Weaber Group|19643|||Visean||||deposition|Visean||||||1160||No|61542||||||New addition to Weaber Gp. when Milligans Fm. was further subdivided into Milligans Fm.and Yow Fm. - revisions by Gorter et al (2005).|Shale and sandy siltstone. Further details of lithology and fossils given by Gorter et al (2005).||||N||17-JAN-23
Yuduyudu Formation|23312|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Spencer Creek Group|29406|||Statherian|||inferred|deposition|Statherian|||inferred|||250|NT|Yes|44112||Rawlings D.|01-MAR-95|Haines, P.|14-MAR-95|Arnhem Land. Max Age: ~1710 Ma. Northern McArthur Basin.|Sandstone: fine-grained, ferruginous; mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Yuendumu Sandstone|26250|||||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Early Cambrian||||deposition|Neoproterozoic||||||700|NT|No|30258|45155||||||Red-brown to pale brown sandstone, minor arkosic sandstone; trace fossils|siliciclastic sedimentary rock|||N||17-JAN-23
Yulyupunyu Granitic Gneiss|30244|Yulyupunyu|23315|||Yes|Formation, beds|Formal|Resvd name published|Described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|43749||Young D.|29-APR-93|||Mt Doreen 1:250 000 sheet area. Of the Arunta Complex. Intrudes Lander Rock beds. See also Yulyupunyu Granite Gneiss.|Deformed megacrystic muscovite-biotite granite; augen gneiss, locally migmatitic|metamorphosed acid igneous rock|high grade metamorphic rock||Y||17-JAN-23
Yumurrpa Granophyre|31344|Yumurrpa|23316|||Yes|Formation, beds|Informal|Variation of reserved name|Described|||||Paleoproterozoic|1760||inferred, structural relationship|intrusion|Paleoproterozoic|1805||inferred, structural relationship|||||No|43631||||||MT THEO 1:250 000 sheet area. Age: >1760Ma.  Intrudes Lander Rock beds. No longer included in Southwark Suite in latest Mt Theo 250K map (2005), so minimum age, based on Yarunganyi Granite (Southwark Suite) may no longer be considered applicable.|Dark grey schistose muscovite-bearing granitic rock with small augen (2-4 mm) of feldspar and quartz|acid intrusive rock|||Y||17-JAN-23
Yungkulungu Formation|23318|||||Yes|Formation, beds|Formal|Resvd name published|Redefined|Ooradidgee Group|39122|||Orosirian|1840|9|inferred, intrusive relationship|magmatic crystallisation|Orosirian|1853|5|inferred, geological correlation|||5100|NT|Yes|24172||Morrison R.S.|15-MAY-91|Kruse, P.D.|31-DEC-95|Tennant Ck 1:250 000? Defn publ. soon. Tennant Creek / Davenport Province. Previously of Flynn Subgroup. Of Ooradidgee Group (Geology of Tennant Creek region 1:500K map), 2004. Age: >1840Ma. Max age from correlation with Monument Formation.|Medium to thick bedded lithic arenite and volcanic litharenite with magnetite/heavy mineral laminae; minor granule and pebble beds; interbedded tabular siltstone, felsic ignimbrite and tuff; thick foliated porphyritic rhyolite lava flows.|medium-coarse grained siliciclastic rock|acid volcanic rock||N||27-APR-23
Yungkulungu Formation - ignimbritic lithofacies|79294|||||Yes|Member, phase|Informal|Other new published name|Described|Yungkulungu Formation|23318|||Paleoproterozoic|1840|9|inferred, intrusive relationship|magmatic crystallisation|Paleoproterozoic|1849|5|inferred, underlying unit|||||No|69424|||||||Felsic ignimbrite, welded tuff, rhyolitic lava and ashstone. Interbedded reworked volcaniclastic rocks.|acid volcanic rock|medium-coarse grained siliciclastic rock||N||27-APR-23
Yungkulungu Formation - sedimentary lithofacies|72692|||||Yes|Member, phase|Informal|Variation of published name|Described|Yungkulungu Formation|23318|||Orosirian|1840|9|inferred, intrusive relationship|deposition|Orosirian|1849|5|inferred, underlying unit|||||No|67175||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Lithic/sublithic/volcanilithic/tuffaceous arenite, siltstone, shale; sandstone, magnetite laminae; welded and non-welded felsic crystal-lithic tuff and lapilli tuff; minor felsic lava and ignimbrite|siliciclastic sedimentary rock|||N||27-APR-23
Yungkulungu Formation - volcanic lithofacies|72693|||||Yes|Member, phase|Informal|Variation of published name|Described|Yungkulungu Formation|23318|||Orosirian|1849|5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Orosirian|1853|5|inferred, geological correlation|||||No|67175||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Welded and non-welded felsic crystal-lithic tuff and lapilli tuff; minor felsic volcanic lava and ignimbrite; felsic crystal-lithic tuff and lapilli tuff; rhyolitic and rhyodacitic lava and ignimbrite; tuffaceous arenite with interbedded siltstone|acid volcanic rock|||N||27-APR-23
Yunkanjini Granite|72410|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Southwark Suite|40018|Mesoproterozoic||||intrusion|Mesoproterozoic|1533|5||||||No|62633||||||Shown as younger than 1590-1570 Ma Chewings Event ie Mesoproterozoic|Coarse to megacrystic porphyritic biotite granite, less abundant dark fine grained phase|acid intrusive rock|||Y||17-JAN-23
Yununba Granite|38049|||||Yes|Formation, beds|Formal|Other new published name|Defined|||Kulpitjata Suite|42439|Mesoproterozoic||||intrusion|Mesoproterozoic|||||||NT|No|24302|24301|||||Within the Pitjantjatjara Supersuite.  Intrudes Allanah Gneiss and Opparinna Metamorphics.|Medium- to coarse-grained muscovite-biotite granite, weakly to strongly porphyritic, strongly foliated.|acid intrusive rock|||Y||17-JAN-23
Zamia Creek Siltstone|21071|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balma Group|21185|||Statherian||||deposition|Statherian||||||300|NT|No|44299|43010|||||Formerly of McArthur Group.|Mudstone: grey, laminated, commonly dolomitic; dolostone: brown to grey, microbial laminations, fenestral fabrics, leached or silicified most outcrops; minor sandstone; cauliflower chert nodules.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Zamu Dolerite|27310|Zamu Complex|27636|||Yes|Formation, beds|Formal|Variation of published name|Defined|||||Orosirian|1850|||intrusion|Orosirian|1870|6|isotopic, U/Pb-Pb/Pb ion probe|||2000|NT|Yes|35140|35140|Ferguson J., Needham R.S.|15-MAY-78|Brown, M.C.|19-JUN-78|Interpreted SHRIMP zircon crystallisation age of 1870+/-6 Ma (Page 1996) might include xenocrystic zircons. Volcanics in Finniss River Group are dated at ~1860 Ma. Intrudes: Wildman Siltstone (Mount Partridge Group), Cahill Formation, Nourlangie Schist; also intrudes Manton Group. Intrudes Koolpin Formation, Gerowie Tuff, Mount Bonnie Formation (South Alligator Group) and Burrell Creek Formation (Finniss River Group). Hosts gold deposits. Now (2012) recognised to be a chemically and isotopically diverse group of widely scattered basement mafic rocks that have undergone deformation and metamorphism. parts renamed as Culaly Amphibolite, Caramal Amphibolite, Namarrkon Amphibolite, Birraduk Amphibolite (Hollis & Glass, 2012)|Grey, medium to coarse quartz dolerite, minor hornblende granophyre; rare biotite-hornblende-augite pegmatite.|basic intrusive rock|||Y||17-JAN-23
Zimmermann Sandstone|21089|Zimmerman Sandstone|21087|||Yes|Formation, beds|Formal|Other new published name|Defined|Langfield Group|10161|||Tournaisian||||deposition|Tournaisian||||||140|WA|No|45038|45038|||||Defn on Tech File D/52-10. See also misspelling Zimmerman Sandstone.|Quartzose, feldspathic and lithic sandstone, minor siltstone and shale.|siliciclastic sedimentary rock|||N||17-JAN-23
adamellite 81336|81336|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian|||inferred||||||||||No|||||||Interpreted for EGGS database, Intersected in borehole Hacking 1 (ENO 11914) at a depth of 1221.9m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79234/5/PR19880079_WCR.pdf||acid intrusive rock|||Y||17-JAN-23
alkali gabbro - Lake Woods 83886|83886|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|mafic intrusives 72360|72360|||Mesoproterozoic|1295|14|isotopic, U/Pb-Pb/Pb ion probe||Mesoproterozoic|1324|4|inferred|||||No|||M. Buddee|12-APR-23|||Of Melville (2012). To be used in GA alkaline rocks data compilation and other products.|Complex quartz-bearing k-feldspar pyroxene-hornblende alkali syenite varying to alkali gabbro of possible essexite composition; abundant apatite, also baddeleyite.|intermediate intrusive rock|basic intrusive rock||Y||25-MAY-23
alluvium 38485|38485|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Holocene||||deposition|Holocene||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project. Map Symbol: Qa.  May have been previously mapped as Qy (Qyt); some Qcc and Czca.|Channel and flood plain alluvium; gravel, sand, silt, clay; may be locally calcreted|regolith|||N||17-JAN-23
alluvium 68119|68119|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium: fine and coarse clay-quartz sand, silt and minor gravel over dolerite, minor metamorphosed and partially metamorphosed gabbro, norite, chlorite schist, tremolite-actinolite schist |regolith|||N||17-JAN-23
alluvium 68120|68120|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium: fine and coarse clay-quartz sand, silt and minor gravel over quartzofeldspathic gneiss, subordinate biotite gneiss |regolith|||N||17-JAN-23
alluvium 68181|68181|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium  |regolith|||N||17-JAN-23
alluvium 68182|68182|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium; aeolian quartz sands with fixed dunes |regolith|||N||17-JAN-23
alluvium 68183|68183|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium; aeolian quartz sand |regolith|||N||17-JAN-23
alluvium 68185|68185|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Cenozoic||||||||No||||||||Alluvium; kaolinitic quartzose sandstone, siltstone, mudstone |regolith|||N||17-JAN-23
alluvium 68191|68191|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Cenozoic||||||||No||||||||Alluvium; undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering) |regolith|||N||17-JAN-23
alluvium 68193|68193|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium over aeolian quartz sand |regolith|||N||17-JAN-23
alluvium 68195|68195|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium; over undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering) |regolith|||N||17-JAN-23
alluvium 68220|68220|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium, colluvium, scree |regolith|||N||17-JAN-23
alluvium 68221|68221|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium, aeolian quartzose sand |regolith|||N||17-JAN-23
alluvium 68222|68222|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Alluvium, aeolian quartzose sand over garnet-biotite-quartz-plagioclase gneiss, amphibolite |regolith|||N||17-JAN-23
amphibolite 68110|68110|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No|||||||Quartz 1:100,000 scale geological map|Metamorphosed basic igneous rocks (amphibolite) lacking relict igneous textures; rare hornblende gneiss, vein quartz |high grade metamorphic rock|||N||17-JAN-23
amphibolite Madderns, Yaya, Iwupataka packages 78219|78219|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Warumpi Province in in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006) . Age inferred from associated granites ~1680 Ma.|Amphibolite|metamorphosed basic igneous rock|||Y||17-JAN-23
basalt 78200|78200|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||eruption|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Kudinga Basalt equivalent inferred under cover. Tennant province in North Arunta 1:500 000 map (Vandenburg et al., 2004), Age inferred ~1810 Ma.|Basalt|basic volcanic rock|||N||17-JAN-23
basalt 78208|78208|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||eruption|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Treasure Volcanics equivalent.  Aileron province in North Arunta 1:500 000 map (Vandenburg et al., 2004). Age inferred ~1810 Ma.|Basalt|basic volcanic rock|||N||17-JAN-23
basement 81340|81340|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian|||inferred||Proterozoic|||inferred|||||No|||||||Interpreted for EGGS database. Intersected in borehole OzGamma 1 (ENO 578023) at a depth of 990m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/80995|Unknown.|unknown|||U||17-JAN-23
bauxite 70593|70593|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic||||deposition|Cenozoic||||||||No||||||||Bauxite, aluminous laterite|regolith|||N||17-JAN-23
black soil 33727|33727|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic|||||Cenozoic||||||||No|44483||||||Used on Alsace, Ardmore, Carrara Range region, Mammoth Mines region 1:100k maps & Mt Drummond 1:250k sheet. Also used in Oban file of Mt Isa dataset.|Black soil.|regolith|||N||17-JAN-23
black soil plain 68902|68902|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Quaternary||||deposition|Cenozoic||||||||No|||Ollie Raymond, Alan Whitaker|10-MAY-05|||Lithology referring to an unnamed unit used for Queensland, Northern Territory and WA 1:1 million geological maps, National Maps Project|Residual black, dark grey or brown clayey soil|regolith|||N||17-JAN-23
calcrete 38490|38490|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Qk.|Calcrete; calcareous cementing of bedrock and transported materials|regolith|||N||17-JAN-23
calcrete 38497|38497|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Unnamed unit for the Australian 1:1 million scale surface geology map for National Maps Project.  Map symbol: Czk.|Calcrete, travertine; calcareous cementing of bedrock and transported materials; pisolitic to nodular or massive; as low mounds, in playa lakes, valley calcrete, or in subsurface; may contain intercalated chalcedony; locally dissected and karstified|regolith|||N||17-JAN-23
carbonate rock 79876|79876|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Carbonate rock.|carbonate sedimentary rock|||N||17-JAN-23
clastics 81390|81390|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||inferred||Proterozoic|||inferred|||||No|||||||Interpreted for EGGS database, Occurs in the Phillip 2 borehole (ENO 14770) starting at a depth of 1473.4m and published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79214/4/PR19880074_WCR.pdf|Light grey shale and siltstone.|fine grained siliciclastic rock|||N||17-JAN-23
claystone 81621|81621|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cretaceous|||inferred||Cretaceous|||inferred|||||No|||||||Undifferentiated Cretaceous at top of Amungee NW-1, 5.35-70 m. Described in cuttings sample descriptions. See: Origin Energy Resources Ltd. 2015. Amungee NW-1 Well completion Report EP98 Beetaloo Basin Northeren Territory. https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/86845 .  For use in EGGS database.|Claystone: yellow, orange yellow, yellowish white, pinkish grey soft to moderately hard, plastic and sticky in part, blocky. Siltstone: moderate reddish brown, orange red, trace lithics, firm, blocky.|siliciclastic sedimentary rock|||N||17-JAN-23
coastal dunes 38488|38488|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Quaternary||||deposition|Quaternary||||||||No|||||||Unnamed unit used on Australian 1:1M scale surface geology map.  Map symbol: Qdc.|Coastal sand dunes, beach sand, barrier beaches, foredune, beach ridges; calcareous and siliceous, locally shelly and/or cemented (beach rock); locally reworked|regolith|||N||17-JAN-23
colluvium 38491|38491|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Quaternary||||deposition|Quaternary||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Qrc. May have been previously mapped as Qc, Czc, Qrg; some Czr and Czca.|Colluvium and/or residual deposits, sheetwash, talus, scree; boulder, gravel, sand; may include minor alluvial or sand plain deposits, local calcrete and reworked laterite|regolith|||N||17-JAN-23
colluvium 68197|68197|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Scree, gravel, colluvium  |sediment|||N||17-JAN-23
colluvium 68198|68198|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Scree, gravel, colluvium  |sediment|||N||17-JAN-23
colluvium 68199|68199|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Scree, gravel, colluvium |sediment|||N||17-JAN-23
colluvium 68223|68223|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Quaternary||||||||No||||||||Colluvium, scree |regolith|||N||17-JAN-23
conglomerate 38504|38504|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Tsc (updated to Czcc)|Conglomerate, sandstone, lesser fine grained sedimentary rocks; locally ferruginised or silicified; includes impact crater-fill conglomerate, breccia and brecciated sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
dark pink crystalline granite 81391|81391|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned||||||||||||||||||No|||||||Interpreted for EGGS database and is found in borehole Randall 1 (ENO 15008) at a depth of 1014.2m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79211/2/PR19920025_WCR.pdf|dark pink crystalline granite|acid intrusive rock|||Y||17-JAN-23
dolerite 31434|31434|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Precambrian|||||Precambrian||||||||No|33759|||||||Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 40535|40535|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic||||intrusion|Proterozoic||||||||No|||||||Lithology referring to an unnamed unit used for  1:1 million geological map, National Maps Project. Also used for subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 68109|68109|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Dolerite, minor metamorphosed and partially metamorphosed gabbro, norite, chlorite schist, tremolite-actinolite schist |basic intrusive rock|||N||17-JAN-23
dolerite 74897|74897|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian||||intrusion|Cambrian||||||||No|||Raymond, O.L.||||Informal unit for WA 1:1 million geology map. Also used for NTGS's Tanami 1:250k sheet area, as a subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area.|Dolerite.|basic intrusive rock|||Y||17-JAN-23
dolerite 78187|78187|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dolerite dykes. Pine Creek province in Pine Creek 1:500 000 map (Lally & Doyle, 2005). Attributed to Oenpelli Dolerite in Mt Evelyn map sheet. Age ~ 1720.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78197|78197|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Tanami province in 1:250 000 solid geology maps (Tanami: Slater, 2000a; The Granites: Slater, 2000b). Plugs and dykes. Associated with Pn4 Nanny Goat Volcanics, intrudes Killi Killi Formation. Age ~1810 Ma.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78198|78198|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Tanami province in 1:250 000 solid geology maps (Tanami: Slater, 2000a; The Granites: Slater, 2000b). Numerous Ptdd sills intrude Tanami Group.  Approximate age ~1830 Ma.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78201|78201|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cambrian|||inferred||Cambrian|||inferred|||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dyke(s) assigned as Kalkarindji LIP. Intrude Renner and Namerinni groups. Tennant province in Tennant Region 1:500 000 map (Donnellan & Johnstone, 2004). Age inferred ~520 Ma. Also used as subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78203|78203|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|1811|5||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dyke(s). Tennant province in Tennant Region 1:500 000 map (Donnellan & Johnstone, 2004). Age from U-Pb (baddeleyite) Claoué-Long et al. (2008a).|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78204|78204|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|1821|8|isotopic, U/Pb|||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dyke(s). Named as dolerite but described as gabbro?? Tennant province in Tennant Region 1:500 000 map (Donnellan & Johnstone, 2004). Age from U-Pb (zircon) Compston (1994).|Gabbro|basic intrusive rock|||Y||17-JAN-23
dolerite 78206|78206|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dykes, sills.  Aileron province in North Arunta 1:500 000 map (Vandenburg et al., 2004). Age inferred ~1810 Ma.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78207|78207|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dykes, sills.  Aileron province in North Arunta 1:500 000 map (Vandenburg et al., 2004).Undated N-S dykes under cover|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite 78210|78210|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|1689|8|isotopic, U/Pb-Pb/Pb ion probe|||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Un-named dykes intrude Strangways Metamorphic Complex. Aileron province in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006). Age ref: Claoue-Long & Hoatson (2005).|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite sills 78199|78199|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Tanami province in North Arunta 1:500 000 map (Vandenburg et al., 2004). Approximate age inferred ~1810 Ma.|Dolerite|basic intrusive rock|||Y||17-JAN-23
dolerite, gabbro, pyroxenite 78214|78214|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cambrian||||intrusion|Cambrian||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Un-named outcrops of Kalkarindji-age mafic plugs. Aileron province in Surface Geology of Australia 1:1 000 000 map (Liu et al., 2007) [so how come no unit of this description aleady in database?].|Dolerite, gabbro, pyroxenite|basic intrusive rock|ultramafic intrusive rock||Y||17-JAN-23
dolerite, metadolerite 74378|74378|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Neoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Also in Officer Basin and Albany-Fraser Province. Also now used for subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area (ie NT & Qld).|Undifferentiated dolerite and gabbro dykes and sills; local granophyric patches, noritic dolerite and gabbro, hornblendite, and minor hybrid rock with rapakivi texture; locally metamorphosed|basic intrusive rock|ultramafic intrusive rock||Y||17-JAN-23
dunes 38496|38496|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Cenozoic||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Qd.|Dunes, sandplain with dunes and swales; may include numerous interdune claypans; may be locally gypsiferous|regolith|||N||17-JAN-23
dyke 75700|75700|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesozoic||||intrusion|Proterozoic||||||||No|||||||Undifferentiated dykes, many interpreted from air photos with no or little age or lithology control.|Unnamed mafic to felsic dykes. Often interpreted from air photos with little or no age or lithology control.|basic intrusive rock|acid intrusive rock||Y||17-JAN-23
estuarine and delta deposits 38489|38489|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Quaternary||||deposition|Quaternary||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Qe.|Estuarine, tidal delta and lagoonal deposits; coastal mud flats, silt and evaporite deposits; may contain older vegetated black soils|regolith|||N||17-JAN-23
fanglomerate 68117|68117|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic|||||Cenozoic||||||||No||||||||Fanglomerate, dissected alluvium and colluvium over quartzofeldspathic gneiss, subordinate biotite gneiss |sediment|||N||17-JAN-23
fanglomerate 68118|68118|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic|||||Cenozoic||||||||No||||||||Fanglomerate, dissected alluvium and colluvium over quartzofeldspathic gneiss, subordinate biotite gneiss |sediment|||N||17-JAN-23
fanglomerate 68177|68177|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic|||||Cenozoic||||||||No||||||||Fanglomerate, dissected alluvium and colluvium |sediment|||N||17-JAN-23
fanglomerate 68178|68178|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic|||||Mesozoic||||||||No||||||||Fanglomerate, dissected alluvium and colluvium; undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering) |sediment|||N||17-JAN-23
fanglomerate 68218|68218|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic|||||Cenozoic||||||||No||||||||Fanglomerate, dissected alluvium and colluvium |sediment|||N||17-JAN-23
felsic intrusives 42189|42189|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Triassic||||intrusion|Permian||||||||No|||||||Lithology referring to an unnamed unit to be used for Australian 1:1 million geological map, National Maps Project. Also surface/subsurface unit interpreted by Alastair Stewart for GA Solid Geology layer in Chinchilla 1:250k sheet area.|Felsic intrusive rocks; including tonalite, diorite, granodiorite, granite, monzogranite, rhyolite, microgranodiorite|acid intrusive rock|||N||17-JAN-23
felsic intrusives 72645|72645|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic|||inferred|intrusion|Paleoproterozoic|||inferred|||||No|||||||Unit  used for Northern Territory 1:1 million geological map National Maps Project, as Orosirian to Statherian. Revised to more general  Paleoproterozoic age and also applied to Pre-Cz geology, NSW & Vic,  basement geology of the Exploring for the Future area in 2019. In WA: felsic intrusives; negative gravity anomaly (relative to surrounding units) and typically very weakly or non-magnetic.|Undifferentiated felsic intrusives, some gneissic|acid intrusive rock|||Y||17-JAN-23
felsic intrusives 72695|72695|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Used in the 1:1million scale geology of Northern Territory data - National Geological Maps project|Undifferentiated felsic intrusives; may be strongly deformed|acid intrusive rock|||Y||17-JAN-23
felsic intrusives 73466|73466|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian||||intrusion|Cambrian||||||||No|||Liu, S.|29-JUN-07|||Informal unit used in the 1:1million surface geology of Australia - Victoria 3rd edition. Also for use by Songfa Liu in Pre-Cz Geology maps. From GSV state seamless geology (2014) and (2011) map symbol -Cg.|Undifferentiated muscovite granite and microgranite, biotite granite; magnetic to non-magnetic|acid intrusive rock|||Y||17-JAN-23
felsic volcanics 80200|80200|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Archean|||||Archean||||||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Felsic volcanic rocks.|acid volcanic rock|||N||17-JAN-23
felsic volcanics and high level intrusives 74547|74547|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||eruption|Paleoproterozoic||||||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. In NT used in Roper River, Mount Young, Bauhinia Downs, Birrindudu 1:250 000 sheet areas.|Felsic volcanics and high level intrusives.|acid volcanic rock|||Y||17-JAN-23
ferruginous duricrust 38498|38498|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Czl.|Ferruginous duricrust, laterite; pisolitic, nodular, vuggy; may include massive to pisolitic ferruginous subsoil, mottled clays, magnesite, reworked products of ferruginous and siliceous duricrusts, calcrete, gossan; residual ferruginous saprolite|regolith|||N||17-JAN-23
gabbro 68113|68113|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic||||intrusion|Proterozoic||||||||No||||||||Gabbro or norite, extensively and partly metamorphosed to amphibolite or mafic granulite; rare meta-ultramafic rock, dolerite |basic intrusive rock|||N||17-JAN-23
gabbro 68114|68114|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic||||intrusion|Proterozoic||||||||No||||||||Gabbro or norite extensively and partly metamorphosed to amphibolite |basic intrusive rock|||N||17-JAN-23
gabbro 68161|68161|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleozoic||||intrusion|Proterozoic||||||||No||||||||Gabbro or norite, partly or substantially metamorphosed to amphibolite, mafic granulite, or retrogressively metamorphosed rock, generally greenschist facies |basic intrusive rock|||N||17-JAN-23
gabbro 68162|68162|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleozoic||||intrusion|Proterozoic||||||||No||||||||Gabbro or norite, partly or substantially metamorphosed to amphibolite, mafic granulite, or retrogressively metamorphosed rock, generally greenschist facies |basic intrusive rock|||N||17-JAN-23
gabbro 68216|68216|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic||||intrusion|Proterozoic||||||||No||||||||Altered gabbro |basic intrusive rock|||N||17-JAN-23
gabbro 78196|78196|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic|1829|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Un-named metabasic unit originally mapped as Wangi Basics. Plugs, minor layered intrusions. May now be included in Lilyarba Mafics - same age date used for both units. Pine Creek province in Pine Creek 1:500 000 map (Lally & Doyle, 2005). Dated, age and outcrop expression post-Wangi. Worden et al. (in press) [how long ago?].|Gabbro|basic intrusive rock|||Y||17-JAN-23
gabbro 78205|78205|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Aileron province in North Arunta 1:500 000 map (Vandenburg et al., 2004). Age inferred ~1810 Ma.|Gabbro|basic intrusive rock|||Y||17-JAN-23
gabbro 78209|78209|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Inferred correlatives of Andrew Young Hills. Aileron province in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006). Inferred age ~1635 Ma.|Gabbro|basic intrusive rock|||Y||17-JAN-23
gabbro 78211|78211|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Aileron province in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006). Age ref: Claoue-Long & Hoatson (2005). Age from dated gabbros and inferred correlatives,  ~1780 Ma.|Gabbro|basic intrusive rock|||Y||17-JAN-23
gabbro 78212|78212|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. . Aileron province in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006). Age ref: Claoue-Long & Hoatson (2005). Age from dated gabbros and inferred correlatives,  ~1810 Ma.|Gabbro|basic intrusive rock|||Y||17-JAN-23
gabbro Casey Inlier West 78218|78218|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||intrusion|Paleoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Warumpi Province in in Northern Territory 1:2 500 000 map (Ahmad & Scrimgeour, 2006) . Age inferred from associated granites ~1635 Ma.|Gabbro|basic intrusive rock|||Y||17-JAN-23
gneiss 35743|35743|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Precambrian|||||Precambrian||||||||No|33104||||||Alcoota 1:250 000, 1:100 000 sheet area. Used in AMS Proterozoic granites data package.|Gneiss; minor schist.||||N||17-JAN-23
gneiss 35746|35746|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs SF53-14.|Schistose biotite gneiss, muscovite-biotite schist, calc-silicate rock, layered amphibolite; some biotite and quartzofeldspathic rock, sillimanite and cordierite gneiss, mafic granulite, marble, porphyroblastic feldspar gneiss, massive amphibolite.||||N||17-JAN-23
gneiss 35747|35747|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs SF53-14.|Quartzofeldspathic gneiss, felsic granulite, mafic granulite; subordinate biotite gneiss, garnet-biotite gneiss; some migmatite and sillimanite gneiss.||||N||17-JAN-23
gneiss 35748|35748|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Strangways Metamorphic Complex|17395|||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs SF53-14.|Quartzofeldspathic gneiss, lenses of mafic granulite; some biotite gneiss, cordierite and garnet-bearing quartzofeldspathic gneiss; rare sapphirine and kornerupine-bearing granofels.||||N||17-JAN-23
gneiss 35749|35749|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs SF53-14.|Quartzofeldspathic gneiss, migmatite, biotite gneiss; some garnet-biotite gneiss, amphibolite, mafic granulite, felsic granulite, sillimanite gneiss, actinolite-quartz calc-silicate rock, muscovite-biotite schist.||||N||17-JAN-23
gneiss 35750|35750|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs SF53-14.|Garnet-bearing quartzofeldspathic gneiss; schistose and banded biotite gneiss, locally garnet-bearing; amphibolite.||||N||17-JAN-23
gneiss 35751|35751|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs SF53-14.|Garnet-biotite gneiss, amphibolite, some hornblende gneiss.||||N||17-JAN-23
gneiss 68121|68121|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No||||||||Quartzofeldspathic gneiss, subordinate biotite gneiss ||||N||17-JAN-23
gneiss 68122|68122|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No||||||||Quartzofeldspathic gneiss, amphibolite ||||N||17-JAN-23
gneiss 68212|68212|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No||||||||Granitic gneiss, biotite gneiss, and garnet-biotite-plagioclase-quartz gneiss; minor amphibolite, biotite schist, mafic granulite, quartzofeldspathic gneiss, quartz-rich metasediment |high grade metamorphic rock|||N||17-JAN-23
gneiss 68213|68213|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No||||||||Quartzofeldspathic gneiss, biotite gneiss, amphibolite and hornblende gneiss; commonly partly retrogressed greenschist facies rock and quartzofeldspathic schist ||||N||17-JAN-23
gneiss 68214|68214|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No||||||||Quartzofeldspathic gneiss, biotite gneiss, granitic gneiss, amphibolite, mafic granulite; in places muscovite-biotite schist or gneiss, calc-silicate rock, porphyroblastic-feldspar gneiss, garnet-biotite-plagioclase-quartz gneiss, marble ||||N||17-JAN-23
gneiss 68232|68232|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Biotite gneiss; amphibolite; quartzofeldspathic gneiss; minor to rare granitic gneiss; porphryoblastic-feldspar gneiss; hornblende gneiss; biotite schist |metamorphosed basic igneous rock|||N||17-JAN-23
gneiss 68233|68233|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Quartzofeldspathic gneiss; amphibolite; biotite gneiss; minor to rare muscovite-biotite schist or gneiss; sillimanite-bearing gneiss, garnet-sillimanite gneiss, other aluminous rocks; garnet-biotite gneiss; migmatite; calc-silicate rock; mafic granulite ||||N||17-JAN-23
gneiss 68234|68234|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Hornblende-plagioclase-microcline gneiss; quartzofeldspathic gneiss ||||N||17-JAN-23
gneisses 31351|31351|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs 1:250 000, Undoolya 1:100 000 sheet area.|Biotite gneiss, amphibolite, porphyroblastic gneiss, granitic gneiss, quartzofeldspathic gneiss|high grade metamorphic rock|||N||17-JAN-23
gossan 68355|68355|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No|||||||Structural term.|Gossan |regolith|||N||17-JAN-23
granite 30721|30721|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||The Granites Supersuite|30715|Paleoproterozoic|||||Paleoproterozoic||||||||No|29811||||||Tanami 1:250 000 sheet area. Tanami Province. See also 79/03448, Kimberley-Mt Isa 1:2.5mill map?|Medium to coarse biotite and muscovite granite; minor gabbroic rocks|acid intrusive rock|||Y||17-JAN-23
granite 31347|31347|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs 1:250 000, Riddoch 1:100 000 sheet area.|Quartzofeldspathic gneiss, biotite gneiss, amphibolite, hornblende gneiss; all commonly metamorphically retrogressed to greenschist facies|acid intrusive rock|||Y||17-JAN-23
granite 31348|31348|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs 1:250 000, Riddoch 1:100 000 sheet area.  Combination of p-Cx1, p-Cx2, p-Cx3, p-Cx4.|Porphyroblastic feldspar gneiss, quartzofeldspathic gneiss, calc-silicate rock;  Garnetiferous biotite-rich gneiss; amphibolite, sillimanite gneiss;  Homogeneous quartzofeldspathic and biotite gneiss of granitic appearance; Muscovite-biotite gneiss quart|acid intrusive rock|||Y||17-JAN-23
granite 31349|31349|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoproterozoic|||||Neoproterozoic||||||||No|39583||||||Alice Springs 1:250 000, 1:100 000 sheet area. Symbol Pg9 used within AMS project.|Granite|acid intrusive rock|||Y||17-JAN-23
granite 31352|31352|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoproterozoic|||||Neoproterozoic||||||||No|39583||||||Alice Springs 1:250 000, 1:100 000 sheet area.|Migmatite, garnet-biotite gneiss, granitic gneiss; minor porphyroblastic and augen gneiss, biotite gneiss, amphibolite|acid intrusive rock|||Y||17-JAN-23
granite 31433|31433|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Precambrian|||||Precambrian||||||||No|33759||||||AMS Arunta package Proterozoic unit Pg8.|Granite|acid intrusive rock|||Y||17-JAN-23
granite 31696|31696|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||Devils Suite|30736|Proterozoic|||||Proterozoic||||||||No|41408||||||Davenport Province 1:250 000 sheet. Also shown as part of -Pg2, structure diagram. Same unit used on Bonney Well 1:250k sheet. May be -Pgu on Tennant Creek 1978 1:250k.|Muscovite-biotite granite; biotite granite, leucocratic microgranite, granodiorite|acid intrusive rock|||Y||17-JAN-23
granite 68112|68112|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Porphyritic and fine even-grained granite and adamellite, including metamorphosed equivalents; minor quartzofeldspathic gneiss and amphibolite |acid intrusive rock|||Y||17-JAN-23
granite 68160|68160|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleozoic|||||Proterozoic||||||||No||||||||Granite, adamellite; includes retrogressively metamorphosed equivalents |acid intrusive rock|||Y||17-JAN-23
granite 81337|81337|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Interpreted for EGGS database. Intersected in borehole Huckitta 1 (ENO 12136) at a depth of 1117.09m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79232/1/PR19660017_WCR.pdf|Granite.|acid intrusive rock|||Y||17-JAN-23
granite 81339|81339|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||8.23||No|||||||Interpreted for EGGS database. Intersected in borehole Lucy Creek 1 (ENO 13043) at a depth of 1097.28m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79223/2/PR19670007_WCR.pdf|Granite.|acid intrusive rock|||Y||17-JAN-23
granitic gneiss 31350|31350|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|39583||||||Alice Springs 1:250 000, Fergusson Range 1:100 000 sheet area.|Hornblende-biotite-microcline granitic gneiss, minor amphibolite.||||Y||17-JAN-23
granitic orthogneiss 80669|80669|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area from NT surface geology: Highland Rocks (-Pgg). Shown as 1810 - 1770 Ma on NTGS 2006 source map.|Granitic gneiss, felsic, medium to coarse-grained, layered, strongly foliated; folded.|metamorphosed acid igneous rock|||Y||17-JAN-23
greenschist 68179|68179|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleozoic|||||Proterozoic||||||||No||||||||Retrograde greenschist facies rocks, including chlorite schist and tremolite-actinolite schist, with undeformed relics of biotite gneiss, muscovite-biotite schist or gneiss, quartzofeldspathic gneiss, amphibolite, vein quartz, muscovite schist, sericite |metamorphic rock|||N||17-JAN-23
greenschist 68219|68219|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleozoic|||||Paleozoic||||||||No||||||||Retrogressed greenschist facies rocks; biotite gneiss; quartzofeldspathic schist; muscovite-biotite schist; chlorite schist, tremolite-actinolite schist; mylonite; epidosite, relict prograde metamorphic rock |metamorphic rock|||N||17-JAN-23
high grade metamorphic rocks 72653|72653|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.. Also subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area in WA.|Undivided high grade metamorphic rocks; metasedimentary and meta-igneous gneiss, granulite, some schist|high grade metamorphic rock|||N||17-JAN-23
hornfels 72362|72362|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Orosirian|||||Orosirian||||||||No|||||||Lithology referring to an informal unnamed unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Undivided pelitic and psammitic hornfels rafts and xenoliths|metasedimentary siliciclastic rock|||N||17-JAN-23
kimberlites 82995|82995|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesozoic|||inferred||Mesozoic|||inferred|||||No|||||||Roper area. Three known kimberlite occurrences (Blackjack, Packsaddle and Stow) that intrude into the McArthur Basin, Northern Territory. Minimal data is available. Berryman et al. (1999) describe the two southeastern bodies, Packsaddle and Blackjack, and suggest they are garnet-rich hypabyssal-facies Group 1 kimberlites. The latter kimberlites are reported as diamond-bearing (Berryman et al. 1999). Jaques (2008) indicates that the Stow body is not diamondiferous.|Garnet-rich hypabyssal-facies Group 1 kimberlites|exotic composition igneous rock|||Y||17-JAN-23
lake deposits 38492|38492|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Quaternary||||deposition|Quaternary||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Qt.|Lake and swamp deposits; mud, silt, evaporites, limestone; minor sand, peat|regolith|||N||17-JAN-23
lamprophyre 78202|78202|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic|1711|2|isotopic, U/Pb-Pb/Pb ion probe|||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Dyke(s). Tennant province in Tennant Region 1:500 000 map (Donnellan & Johnstone, 2004). Age from U-Pb (zircon) Claoué-Long et al. (2008b).|Lamprophyre|exotic composition igneous rock|||Y||17-JAN-23
lamprophyre dykes - Tennant Creek 83888|83888|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Statherian|1690|18|isotopic||Statherian|1715|11|isotopic, U/Pb-Pb/Pb ion probe|||||No|||M. Buddee|12-APR-23|||To be used in GA alkaline rocks data compilation and other products. Page 1995 got a range of ages with largish errors (see min and max ages). Preferred age is from Maidment et al. 2006.|Lamprophyre dykes; mostly shoshonitic magnesian minettes with phlogopite.|exotic composition igneous rock|||Y||25-MAY-23
lamprophyre dykes - Toms Gully 83887|83887|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Orosirian|1820||inferred||Orosirian|1831|6|inferred, intrusive relationship|||||No|||M. Buddee|12-APR-23|||To be used in GA alkaline rocks data compilation and other products. Intrude the Mount Goyder Syenite and Mount Bundey Granite (1831+/-6 Ma)|Shoshonitic lamprophyre dykes.|exotic composition igneous rock|||Y||25-MAY-23
limestone 68210|68210|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene||||deposition|Cenozoic||||||||No||||||||Chalcedonic limestone, greenish-grey siltstone, sandstone|carbonate sedimentary rock|||N||17-JAN-23
limestone 68231|68231|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene||||deposition|Cenozoic||||||||No||||||||Chalcedonic limestone, siltstone, sandstone |carbonate sedimentary rock|||N||17-JAN-23
limestone 72694|72694|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Unnamed unit used for Australian 1:1million geological map, National Geological Maps Project.|Limestone, chalcedonic limestone; calcareous siltstone, sandstone, conglomerate|carbonate sedimentary rock|||N||17-JAN-23
low to medium grade metamorphic rocks 72656|72656|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Cambrian|||||Cambrian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Low to medium grade metamorphic rocks; metasandstone, metaconglomerate, quartzite, schist|metasedimentary rock|metamorphosed igneous rock||N||17-JAN-23
mafic and felsic gneiss 78222|78222|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Musgrave province in Musgrave Block 1:500 000 map (Slater, 2000a,b). Inferred protolith age in Edgoose et al. (2004). Age ~1590.|Pyroxene granulite|high grade metamorphic rock|||U||17-JAN-23
mafic intrusives 39448|39448|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Permian|||inferred|intrusion|Carboniferous|||inferred|||||No|||||||Lithology referring to an unnamed unit to be used for Queensland 1:1 million geological map, National Maps Project. Also used in Beetaloo 1:250k map sheet in NT.|Dolerite, microdiorite, gabbro, diorite; minor monzonite and meladiorite|intermediate intrusive rock|basic intrusive rock||Y||17-JAN-23
mafic intrusives 72360|72360|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic|||inferred|intrusion|Paleoproterozoic|||inferred|||||No|||||||Lithology referring to an informal unnamed unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Also to be used for a subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Dolerite, gabbro, norite; dykes, sills, small intrusions; may be metamorphosed or partly metamorphosed to amphibolite|basic intrusive rock|||Y||17-JAN-23
mafic metamorphic rocks 74337|74337|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Used in WA and NT, for Surface Geology 2012 and Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Amphibolite, metadolerite, metagabbro, hornblende schist|metamorphosed basic igneous rock|||U||17-JAN-23
mafic-ultramafic intrusions 78499|78499|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||||Paleoproterozoic|1635|||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Aileron province in Meixner magnetic interpretation. See Meixner, A.J. and Hoatson, D.M., 2003. Geophysical interpretation of Proterozoic mafic-ultramafic intrusions in the Arunta Region, Central Australia. Record, 2003/29. Geoscience Australia: Canberra, 25 pp. (As Western mafic intrusions). Age: 1635 approx.|assumed mafic and ultramafic intrusions undercover, interpreted from magnetics.|basic intrusive rock|ultramafic intrusive rock||Y||17-JAN-23
manganese deposits 72359|72359|||||Yes|Member, phase|Unnamed|Unnamed published|Described|Walker River Formation|23121|||Cenomanian||||deposition|Aptian||||||||No|||||||Lithology referring to an informal unnamed unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Pisolitic manganese deposits|regolith|||N||17-JAN-23
metamorphic rocks 72661|72661|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Cambrian|||||Cambrian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Undifferentiated gneiss, migmatite, quartzite, schist|high grade metamorphic rock|||N||17-JAN-23
metamorphosed mafic intrusives 72662|72662|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Metamorphosed mafic intrusives; amphibolite, mafic granulite|metamorphic rock|||N||17-JAN-23
metamorphosed mafic intrusives 72664|72664|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleozoic||||intrusion|Cambrian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Metamorphosed mafic intrusives; amphibolite|basic intrusive rock|||Y||17-JAN-23
metamorphosed ultramafic rocks 72665|72665|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Undifferentiated metamorphosed ultramafic rocks|metamorphosed ultramafic rock|||U||17-JAN-23
metamorphosed ultramafic rocks 72666|72666|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleozoic||||eruption|Paleozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Metamorphosed ultramafic rocks; metahornblendite|ultramafic volcanic rock|ultramafic intrusive rock||Y||17-JAN-23
metamorphosed ultramafic rocks 72700|72700|||||Yes|Formation, beds|Informal|Unnamed published|Mentioned|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Used in the 1:1 million geology of Northern Territory  - National Geological Maps project|Metamorphosed mafic to ultramafic rocks; hornblende-plagioclase-pyroxene amphibolite, massive to weakly foliated|metamorphosed ultramafic rock|||Y||17-JAN-23
metasediments 72361|72361|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic|||||Paleoproterozoic||||||||No|||||||Lithology referring to an informal unnamed unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Undifferentiated low grade metasediments and sedimentary rocks; quartzite, schist, slate, phyllite, conglomerate.  Age and association uncertain|metasedimentary siliciclastic rock|||N||17-JAN-23
metasediments, amphibolite 78223|78223|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Musgrave province in Musgrave Block 1:500 000 map (Slater, 2000a,b). Inferred protolith age in Edgoose et al. (2004). Age ~1590.|Amphibolite|metamorphosed basic igneous rock|||U||17-JAN-23
metavolcanics 81392|81392|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoproterozoic|||inferred||Neoproterozoic|||inferred|||||No|||||||Interpreted for EGGS database, Found in borehole Ross 1 (ENO 15206) at a depth of 978.4m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79210/1/PR19920032_WCR.pdf|Metavolcanics.|metamorphosed igneous rock|||N||17-JAN-23
moderately magnetic rocks 79887|79887|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. See also 'Proterozoic rocks - undivided - moderately magnetic 74565' used for Basement Geology of Northern Queensland.|Unknown.||||U||17-JAN-23
moderately magnetic rocks 80285|80285|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||inferred||Proterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.|unknown|||U||17-JAN-23
moderately magnetic rocks 80639|80639|||||Yes|Formation, beds|Unnamed|Unnamed published|Unpublished|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area. Bloods Range and Ayers Rock/Uluru 1:250k sheet areas, also used in WA.|Unknown.||||U||25-SEP-23
mylonite 72710|72710|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Neoproterozoic||||deformation|Neoproterozoic||||||||No|||||||Unnamed shear zone and mylonite unit in the Musgrave Block.  Used in the 1:1 million scale geology of NT and SA, National Geological Maps Project.|Shear zones, mylonite, cataclasite of the Musgrave Block|fault or shear rock|||N||17-JAN-23
mylonite 73074|73074|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Paleoproterozoic||||deformation|Paleoproterozoic||||||||No|||||||Used in the 1:1 million scale geology of SA, National Geological Maps Project. Also used for subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area, NT.|Mylonitised rocks, undifferentiated|fault or shear rock|||U||17-JAN-23
orthogneiss 31431|31431|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Precambrian|||||Precambrian||||||||No|33104||||||Alcoota 1:250 000, 1:100 000 sheet area. Described as granite Pcg in AMS data package.|Orthogneiss. Described as granite Pcg in AMS data package.||||N||17-JAN-23
pegmatite 31432|31432|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No|33104||||||Described as granite Pp1 in AMS data package.|Pegmatite. Described as granite Pp1 in AMS data package.||||Y||17-JAN-23
pegmatite 68235|68235|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Pegmatite |igneous intrusive rock|||N||17-JAN-23
pelitic and mafic gneiss 78221|78221|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Musgrave province in Musgrave Block 1:500 000 map (Slater, 2000a,b).  Inferred protolith age in Edgoose et al. (2004). Age ~1590.|Pyroxene granulite|high grade metamorphic rock|||U||17-JAN-23
quartz mylonite 72696|72696|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic||||deformation|Proterozoic||||||||No|||||||Used in the 1:1 million scale geology of Northern Territory|Quartz mylonite|fault or shear rock|||N||17-JAN-23
quartz vein 72678|72678|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Proterozoic||||alteration|Proterozoic||||||||No|||||||Used for Northern Territory and WA 1:1 million geological maps, National Maps Project.|Quartz vein|metasomatic rock|||N||17-JAN-23
quartzite 35744|35744|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No|33104||||||Alcoota 1:250 000 sheet area. Used in AMS Proterozoic granites data package.|Mylonitized quartzite.||||N||17-JAN-23
quartzite 72679|72679|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Statherian|||||Statherian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Foliated quartzite, possible sedimentary origin|metasedimentary rock|||N||17-JAN-23
quartzite 72680|72680|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Massive to sheared quartzite, contains muscovite, garnet and biotite in places|metasedimentary siliciclastic rock|||N||17-JAN-23
quartzite 80695|80695|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Shown on Mount Liebig 1:250 000 sheet SF52-16, 2nd ed (2003), as Pq, associated with foliated biotite granite, Pgy. Unit also interpreted by Songfa Liu for the basement geology of the Exploring for the Future area.|Foliated crystalline quartzite, quartz breccia; uncertain origin.|metasedimentary siliciclastic rock|||N||17-JAN-23
retrograde schist zones 72682|72682|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleozoic||||deformation|Paleozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Also to be used in Georgina-Arunta energy assessment 1:1 million solid geology interpretation.|Retrogressed greenschist facies rocks; mainly schist, some mylonite and breccia|fault or shear rock|||N||17-JAN-23
sand 68203|68203|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Aeolian quartz sand with fixed dunes |regolith|||N||17-JAN-23
sand 68205|68205|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Aeolian quartz sand |regolith|||N||17-JAN-23
sand 68207|68207|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Aeolian quartz sand; alluvium |regolith|||N||17-JAN-23
sand 68224|68224|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Red clayey soil and sand |regolith|||N||17-JAN-23
sand 68225|68225|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Red clayey soil and sand, aeolian quartzose sand |regolith|||N||17-JAN-23
sand 68226|68226|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Red clayey soil and sand over muscovite-biotite schist; quartzite; minor to rare quartzofeldspathic schist; quartzofeldspathic gneiss; amphibolite; layered quartz-rich quartzofeldspathic gneiss; chlorite schist; tremolite-actinolite schist |regolith|||N||17-JAN-23
sand 68227|68227|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Red clayey soil and sand over biotite-plagioclase-quartz gneiss; amphibolite; biotite gneiss; muscovite-biotite schist and schistose gneiss |regolith|||N||17-JAN-23
sand 68228|68228|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Aeolian quartzose sand  |regolith|||N||17-JAN-23
sand 68229|68229|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No||||||||Aeolian quartzose sand, colluvium, scree |regolith|||N||17-JAN-23
sand plain 38499|38499|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Czs.  May have been previously mapped as Qs; some Czr in QLD.|Sand or gravel plains; may include some residual alluvium; quartz sand sheets commonly with ferruginous pisoliths or pebbles; local clay, calcrete, laterite, silcrete, silt, colluvium|regolith|||N||17-JAN-23
sandstone 31439|31439|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoproterozoic||||deposition|Neoproterozoic||||||||No|33759||||||Ngalia Basin?|Sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
sandstone 81601|81601|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian|||inferred, overlying unit|minimum depositional age|Cambrian|||inferred, underlying unit|deposition||||No|||||||Subsurface unit  called Base Cambrian Sandstone in Manbulloo S1. Top depth 336 m. Thickness 29m. See Pangea Resources, 2015. BASIC WELL COMPLETION REPORT NT EP-167 - Manbulloo-S1 https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/83413  . For use in EGGS database.|Sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
sandstone and siltstone basement 81338|81338|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Adelaidean|||||Paleoproterozoic|||inferred|||||No|||||||Interpreted for EGGS database. Intersected in borehole Hunt 1 (ENO 12147) at a depth of 468.6m. Published in https://geoscience.nt.gov.au/gemis/ntgsjspui/bitstream/1/79549/7/PR19920028_WCR.pdf|Sandstone, siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
sandstone, claystone 81622|81622|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cretaceous|||inferred||Cretaceous|||inferred|||||No|||||||Undifferentiated Cretaceous at top of Beetaloo W-1, 5.35-116.7 m. Described in cuttings sample descriptions. See: Origin Energy Resources Ltd. 2016. Beetaloo W-1 Well completion Report EP117 Beetaloo Basin Northeren Territory.https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/87806 . For use in EGGS database.|Claystone dominated for top 30 m, then sandstone dominated. Minor siltstone.Claystone:yellow, orange, minor off white, kaolinitic, trace lithics, silty in part, hard, blocky to sub blocky. Sandstone: v fine to coarse, mod sorted, subrounded ...|sedimentary rock|||N||17-JAN-23
schist 31435|31435|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Precambrian|||||Precambrian||||||||No|33759|||||||Schist|metamorphic rock|||N||17-JAN-23
sedimentary and volcanic rocks 80287|80287|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Proterozoic|||inferred||Proterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sedimentary and volcanic rocks|sedimentary rock|igneous volcanic rock||N||17-JAN-23
sedimentary rocks 72357|72357|sandstone 74489|74489|||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Lithology referring to an informal unnamed unit to be used for Australian 1:1 million geological map, National Maps Project. Also to be used for subsurface unit interpreted by Tony Meixner for the basement geology of the Exploring for the Future area. A more specific WA sandstone unit, used in 2010, was incorporated into this broader 'unit' in the 2012 Surface Geology.|Undifferentiated consolidated Cenozoic sedimentary rocks; sandstone, limestone, conglomerate, siltstone, coal, duricrust; commonly ferruginised or silicified; may be poorly consolidated, highly weathered, and dissected by present day drainage.|siliciclastic sedimentary rock|regolith||N||17-JAN-23
sediments 38493|38493|||||Yes|Formation, beds|Unnamed|Unnamed published|Unpublished|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Cz.  Unit to be used as a last resort when no other lithology can be determined.|Undifferentiated unconsolidated alluvial, colluvial and residual deposits: sand, soil, silt, gravel, sheetwash, talus, duricrust|regolith|||N||17-JAN-23
sediments 39471|39471|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cretaceous|||inferred|deposition|Cretaceous|||inferred|||||No|||||||Lithology referring to an unnamed unit to be used for Australian 1:1 million geological map, National Maps Project.|Sandstone, pebbly sandstone, conglomerate, mudstone, siltstone; crossbedded, rippled, graded; mesa and bench forming; may be ferruginised or silicified|siliciclastic sedimentary rock|||N||17-JAN-23
sediments 40532|40532|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cretaceous||||deposition|Jurassic||||||||No|||||||Lithology referring to an unnamed unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Quartz sandstone, minor mudstone and conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
sediments 72358|72358|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Cretaceous||||deposition|Upper Jurassic||||||||No|||||||Lithology referring to an informal unnamed unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Undifferentiated sediments, largely previously mapped as Mullaman beds (now discontinued); quartzose to lithic and micaceous sandstone, siltstone, claystone, conglomerate, minor breccia; commonly ferruginised or silicified; locally fossiliferous|siliciclastic sedimentary rock|||N||17-JAN-23
sediments 72683|72683|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleoproterozoic||||deposition|Paleoproterozoic||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Also used for subsurface unit interpreted by Songfa Liu for the basement geology of the Exploring for the Future area in WA, and Qld.|Undifferentiated sedimentary rocks; sandstone, siltstone, shale, conglomerate, limestone, quartzite|siliciclastic sedimentary rock|||N||17-JAN-23
sediments 72684|72684|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Permian||||deposition|Permian||||||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project.|Undifferentiated Permian sedimentary rocks; silty sandstone, micaceous siltstone|siliciclastic sedimentary rock|||N||17-JAN-23
sediments 72685|72685|||||Yes|Formation, beds|Unnamed|Unnamed published|Described|||||Paleozoic|||inferred|deposition|Paleozoic|||inferred|||||No|||||||Unit to be used for Northern Territory 1:1 million geological map, National Maps Project. Subsurface unit interpreted by Alastair Stewart for GA Solid Geology layer in Amadeus Basin and eastern Qld (Charters Towers area).|Undifferentiated sedimentary rock. Probably siliciclastics.|sedimentary rock|||N||17-JAN-23
sediments 81596|81596|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cretaceous|||inferred||Cretaceous|||inferred|||||No|||||||Undifferentiated Cretaceous near top of Wyworrie 1, above 50.58 m, and not distinguished from surficial sediments. See Pangea Resources, 2016. BASIC WELL COMPLETION REPORT NT EP-167 - Wyworrie-1. https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/86440.  Also Undifferentiated Cretaceous near top of Birdum Creek 1 above 53.42 m and not distinguished from surficial sediments. See Pangea Resources, 2016. BASIC WELL COMPLETION REPORT NT EP-167- Birdum Creek-1. https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/86120  .  For use in EGGS database.|Sedimentary rocks.|sedimentary rock|||N||17-JAN-23
sediments 81598|81598|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||inferred|minimum depositional age|Cretaceous|||inferred, underlying unit|maximum depositional age||||No|||||||Top 5 m of Manbulloo S1, Hidden Valley S2.  Said to be underlain by Cretaceous rocks. See Pangea Resources, 2015. BASIC WELL COMPLETION REPORT NT EP-168 - Hidden Valley-S2.  https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/83245  .Also BASIC WELL COMPLETION REPORT NT EP-167 - Manbulloo-S1 https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/83413  .   For use in EGGS database.|Surficial sediments.|regolith|||N||17-JAN-23
sediments, volcanics - moderately magnetic 79883|79883|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments, volcanics.|sedimentary rock|igneous volcanic rock||N||17-JAN-23
sediments, volcanics - strongly magnetic 79885|79885|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments, volcanics.|sedimentary rock|igneous volcanic rock||U||17-JAN-23
sediments, volcanics - weakly magnetic 79886|79886|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Sediments, volcanics.|sedimentary rock|igneous volcanic rock||U||17-JAN-23
shale 81335|81335|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Silurian|||inferred||||||||289.6||No|||||||Interpreted for EGGS database, intersected in borehole Alice 1 (ENO 5701) at a depth of 355.09m. Published in https://d28rz98at9flks.cloudfront.net/159/Bull_100.pdf|Shale.|fine grained siliciclastic rock|||N||17-JAN-23
shale 81599|81599|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cambrian|||inferred|deposition|Neoproterozoic|||inferred|deposition||||No|||||||Subsurface unit in EFTF area described as 'Unit D'  in Brunette Downs 1, Interval top 1410 ft (429.8 m), thickness penetrated 630ft (192 m).  Overlying units A and B are considered to be Anthony Lagoon beds, See https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/79236.  1965 report P.A.P. Brunette Downs No.1 Well Northern Territory Well Completion Report by Mines Administration Pty. Ltd. Interpreted for EGGS database.|Dominantly shale. Thin dark brown to black micaeous shales interbedded with green shale. Minor greenish-white, glauconitic, argillaceous, micaceous, quartzose  siltstone beds present. Trace marcasite, pyrite. Microfossils - unidentified in 1965.|fine grained siliciclastic rock|||N||17-JAN-23
silcrete 42026|42026|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic||||deposition|Cenozoic||||||||No|||||||Lithology referring to an unnamed unit to be used for the Australian 1:1 million geological map, National Maps Project.|Silcrete, silicified gravel, siliceous duricrust, siliceous breccia; opaline silica, jasperoidal chalcedony, local chrysoprase caprock over ultramafic rock|regolith|||N||17-JAN-23
silcrete 68209|68209|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cenozoic||||||||No|||||||Unnamed unit used on NT 1:100K maps|Silcrete ||||N||17-JAN-23
silcrete 68230|68230|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cenozoic||||||||No|||||||Unnamed unit used on NT 1:100K maps|Silcrete over kaolinitic quartzose sandstone ||||N||17-JAN-23
soil, claystone, chert 81600|81600|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic|||inferred|minimum depositional age|Cambrian|||inferred, underlying unit|maximum depositional age||||No|||||||Unit in EFTF area at the top of Frewena 1, thickness  25ft (7.6 m).  See https://geoscience.nt.gov.au/gemis/ntgsjspui/handle/1/79235  Barkley Oil Company, 1965. Completion Report Frewena No.1 Well Oil Permit 73 (2). Interpreted for EGGS database.|Grey sandy and limy surface soil; grey and rusty, porous, sandy hardpan and claystone; varicoloured speckled and banded chert|regolith|||N||17-JAN-23
strongly magnetic rocks 79902|79902|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. See also 'Proterozoic rocks - undivided - highly magnetic 74563' used for Basement Geology of Northern Queensland.|Unknown.|unknown|||U||17-JAN-23
strongly magnetic rocks 79935|79935|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Mesoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area, Also Songfa Liu for WA. See also 'Proterozoic rocks - undivided - highly magnetic 74563' used for Basement Geology of Northern Queensland.|Unknown.||||U||25-SEP-23
strongly magnetic rocks 80284|80284|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||inferred||Proterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.|unknown|||U||17-JAN-23
type C dolerite 78220|78220|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Mesoproterozoic||||intrusion|Mesoproterozoic||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013.  Musgrave province in Musgrave Block 1:500 000 map (Slater, 2000a,b). Age poorly-constrained (unpublished S-s., Sun, GA), ~1000 Ma Sm-Nd age mentioned by Glikson et al. (1996); assign as possible Giles equivalent ~1070.|Dolerite|basic intrusive rock|||Y||17-JAN-23
ultramafic rock 68217|68217|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Meta-ultramafic rock ||||N||17-JAN-23
ultramafic rock 80290|80290|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Cenozoic|||inferred||Mesozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Ultramafic rock.|ultramafic igneous rock|||U||17-JAN-23
ultramafic rocks 68116|68116|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||||Proterozoic||||||||No||||||||Meta-ultramafic rocks, including metahornblendite, hornblende-rich amphibolite, granular tremolite/actinolite rock; rare mafic granulite  ||||N||17-JAN-23
ultramafics 68163|68163|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleozoic|||||Proterozoic||||||||No||||||||Meta-ultramafic rock, serpentinite; minor amphibolite, retrogressively metamorphosed rock, generally greenschist facies ||||N||17-JAN-23
undetermined rocks #84090|84090|Mesoproterozoic undivided 80646|80646|||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||||Mesoproterozoic||||||||No|||||||Used in GA Solid geology pre-Neoproterozoic layer WA 2023. Assumed to be interpreted from unspecified geophysics.|Unknown.||||U||25-SEP-23
weakly magnetic rocks 79881|79881|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area,  province undetermined. Used in NT and Walsh 1:250k sheet area, QLD. Also WA.|Unknown.|unknown|||U||17-JAN-23
weakly magnetic rocks 79922|79922|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Paleoproterozoic|||inferred||Paleoproterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area. See also 'Proterozoic rocks - undivided - weakly magnetic 74564' used in Basement Geology of Northern Queensland.|Unknown.||||U||17-JAN-23
weakly magnetic rocks 80286|80286|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Proterozoic|||inferred||Proterozoic|||inferred|||||No|||||||Subsurface unit interpreted by Alastair Stewart for the basement geology of the Exploring for the Future area.|Unknown.|unknown|||U||17-JAN-23
weathered rock 68358|68358|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cenozoic||||||||No||||||||Deeply weathered rock (age of weathering) |regolith|||N||17-JAN-23
weathered rock 68366|68366|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cretaceous||||||||No||||||||Undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering) ||||N||17-JAN-23
weathered rock 68367|68367|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary|||||Cretaceous||||||||No||||||||Undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering); scree, gravel, colluvium ||||N||17-JAN-23
weathered rock 68368|68368|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cretaceous||||||||No||||||||Undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering); over dolomite, siltstone, shale, sandstone ||||N||17-JAN-23
weathered rock 68369|68369|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cretaceous||||||||No||||||||Undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering); over dolomite, siltstone, shale  ||||N||17-JAN-23
weathered rock 68370|68370|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene|||||Cretaceous||||||||No||||||||Undivided deeply-weathered rock, commonly with well-developed ferruginous, mottled and leached zones (age of weathering) ||||N||17-JAN-23
