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
Abels Bay Formation|23322|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Ferntree Group|6611|||Capitanian||||deposition|Wordian|||||||TAS|No|39234|41895|Farmer N.|04-JUL-77|||See also misspelling Ables Bay Formation, and informal Abels Bay formation. Part  of Upper Marine Sequence. Within the Lower Parmeener Supergroup.|Siltstone, sandy siltstone, and minor sandstone beds with frequent dropstones and rare fossil horizons, with minor beds of pebble and granule conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Aberfoyle Formation|26336|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian||||||||No|30155||||||Includes uranium-bearing pyritic black shale at Castle Carey Creek, near Rossarden (GSA Special Publication 15 p335). See also Aberfoyle Group. Within the Parmeener Supergroup.|Dominantly fine-grained, well sorted quartz sandstone, commonly with interbedded and interlaminated carbonaceous shale, lesser conglomerate and rare coal.|siliciclastic sedimentary rock|||N||17-JAN-23
Adams beds|101|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Cambrian|||||Cambrian||||||||No|42838||||||Local name for serpentinitic conglomerate unit.|Serpentinitic conglomerate|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Adamsfield Complex|103|Adamsfield complex|104|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Cambrian|||||Cambrian||||||||No|37056||||||See also Adamsfield Ultramafic Complex|Contains ultramafic associations.|ultramafic igneous rock|||N||17-JAN-23
Adventure Bay Coal Measures|30016|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Upper Parmeener Supergroup|18944|||Late Permian||||deposition|Late Permian||||||||No|43072||||||Age from GSA Special Pub 15 (1989) p309||organic rich sedimentary rock|||N||17-JAN-23
Ahrberg Group|160|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Early Cambrian|||||Cryogenian||||||||No|41908||||||Smithton-Rocky Cape region. See also Eastern Arhrberg Group and name variations.|Basal proximal marine turbidite fan deposits, fining upwards into mudstone and cherty beds then into the fine-grained Savage Dolomite.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Ainslie Member|176|||||Yes|Member, phase|Formal|Other new published name|Fully described|Waterhouse Formation|19582|||Quaternary||||deposition|Quaternary||||||||No|35466||||||Not to be confused with Ainslie nomenclature of NSW and ACT.|||||N||17-JAN-23
Akaroa Granodiorite|204|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Gardens Suite|31503|Upper Devonian||||intrusion|Middle Devonian||||||||No|35826||||||I-type biotite granodiorite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). See also the informally named Akaroa Granite.|Medium- to coarse-grained granodiorite, medium dark gery with sparse small K-feldspar phenocrysts and rare larger ones; mineralised with mainly pyrite, pyrrhotite?-chalcopyrite and molybdenite.|acid intrusive rock|||Y|I-type|17-JAN-23
Altmoor Sand|336|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Upper Pleistocene||||deposition|Upper Pleistocene||||||||No|33358|||||||||||N||17-JAN-23
Amber Formation|352|Amber Slate|26342|||Yes|Formation, beds|Formal|Other new published name|Described|Eldon Group|27768|||Devonian||||deposition|Silurian||||||||No|41896|||||||Mainly mudstone and siltstone with minor sandstone and rare limestone;  fine-grained sandstone present.|siliciclastic sedimentary rock|||N||17-JAN-23
Amber Slate|26342|Amber Formation|352|||Yes|Formation, beds|Formal|Variation of published name|Described|Eldon Group|27768|||Wenlock|||||Llandovery||||||||No|44970||||||Described. Used until 1991. Then replaced by Amber Formation, but Amber Slate reinstated ~2011|Cleaved interbedded mudstone or slate, siltstone, minor fine-grained sandstone, rare limestone. Locally fossiliferous.|fine grained siliciclastic rock|||N||17-JAN-23
Anderson Bay Formation|418|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Holocene||||deposition|Holocene||||||||No|35466|||||||||||N||17-JAN-23
Andersons Creek Ultramafic Complex|424|||||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Middle Cambrian|||||Early Cambrian||||||||No|30889|||||||Mostly  massive to thinly layered, variably serpentinised orthopyroxene to websterite. Also ?layered pyroxenite, peridotite and gabbro, layered norite, gabbronorite, gabbro, rodingite and rare hornblendite.|ultramafic intrusive rock|basic intrusive rock||Y||17-JAN-23
Angahook Formation|434|Angahook member|436|||Yes|Formation, beds|Formal|Unknown or process pending|Fully described|Demons Bluff Group|36796|||Oligocene|28.7|.2|isotopic, Ar/Ar, step heat|deposition|Eocene||||||||No|70942||||||Was replaced by Angahook Member for a while, but Formation seems to be current preferred name [CEB Aug2015]|Sandstone, conglomerate, claystone, basalt, tuff, breccia and pyroclastics.|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Animal Creek Greywacke|461|||||Yes|Formation, beds|Formal|Other new published name|Described|Mount Charter Group|30225|||Middle Cambrian|||||Middle Cambrian||||||||No|36788||||||Geological Evolution of Tasmania volume 2014 (p164) states Animal Creek Greywacke overlies basal Black Harry Beds; and is dominantly micaceous- siliceous sandstone of metamorphic derivation, with interbedded grey to black mudstone; and is up to 500 m thick (Collins et al. 1981). Also, Que River Shale overlies (p165). Other authors (Refid 69369, 2014, p288) regard Black Harry Beds as the lower unit of Animal Creek Greywacke.|A volcanic-rich greywacke; dominated by micaceous-siliceous sandstone of metamorphic derivation, with interbedded grey to black mudstone. Contains scattered high-Cr spinel grains.|siliciclastic sedimentary rock|||N||17-JAN-23
Annakananda Formation|24161|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Weld River Group|24566|||Neoproterozoic||||deposition|Neoproterozoic||||||100|TAS|Yes|41908||Calver C.R.|10-NOV-88||||Predominantly closed-framework, pebble-cobble conglomerate, usually reddish in colour, and red to brown lithic sandstone. Correlates east of Weld River are predominantly red mudstone, with minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Ansons Bay Granite|472|Ansons Bay Adamellite|26347|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian|366|26|isotopic, Rb/Sr|intrusion|Middle Devonian|384|2.4|isotopic, U/Pb-Pb/Pb ion probe|||||No|37797||||||Superseded by Ansons Bay Adamellite [advice from McClenaghan Feb95], but reverted to Granite in 2005.  Part of the Blue Tier Batholith. Becomes more fractionated northward and has previously been split into Ansons Bay North and Ansons Bay South Granites on the basis of chemical and textural differences (RefID 61723 p816).|S-type, felsic syenogranite to monzogranite with accessory garnet and cordierite.|acid intrusive rock|||Y|S-type|17-JAN-23
Anthony Road Andesite|31151|||||Yes|Formation, beds|Formal|Other new published name|Described|Mount Read Volcanics|13057|||Drumian||||eruption|Drumian|502|6||||||No|43164||||||The once proposed  Anthony Member (TAS) is now the Mount Julia Member - and should not to be confused with reserved Anthony Member for South Australia. Age: Furongian is from the legend description for informal Anthony Road Andesites (Refid 69859, 2011).|Andesite. Lavas, intrusives, breccias, volcaniclastics, feldspar-pyroxene-hornblende with or without quartz-phyric.|intermediate volcanic rock|||N||17-JAN-23
Applebee Volcanics|506|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||||||eruption|||||||||No|36788||||||Ordovician? Name probably obsolete. Not used since 1979.|||||N||17-JAN-23
Archer Formation|39978|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Cambrian||||deposition|Cambrian||||||275||No|24548|||||||Greywacke, slate, subordinate greywacke and greywacke breccia.|siliciclastic sedimentary rock|||N||17-JAN-23
Arm Schist|73349|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Precambrian|||||Precambrian||||||||No|63167||||||Incorporated into Howell Group by Jennings (1963) but unclear whether or not the name remains in current usage? Named for the Arm River.||metamorphic rock|||N||17-JAN-23
Arndell Sandstone|24668|Westfield Sandstone|19830|||Yes|Formation, beds|Formal|Other new published name|Defined|Gordon Group|7586|||Silurian||||deposition|Upper Ordovician||||||250|TAS|No|35671|35671|||||Arndell Sandstone was previously superseded by Westfield Sandstone. Now reinstated. See Geological Evolution of Tasmania (2014) volume, p244, states: in Gordon Group type area the uppermost unit is Arndell Sandstone (previously Westfield Sandstone or Westfield beds; Corbett and Banks 1975, Baillie 1979, Banks and Baillie 1989).|Buff-coloured siltstone dominant in lower part and very fine-grained quartz sandstone dominant higher up; bioturbated, local herringbone crossbedding; fossiliferous decalcified sandstone at top contact.|siliciclastic sedimentary rock|||N||17-JAN-23
Aroo Sequence|41025|||||Yes|Formation, beds|Sequence stratigraphy|Sequence strat published|Described|||||lower Nothofagidites asperus|44||biozone||upper Malvacipollis diversus|51.5|||||||No|14235||||||Early Eocene (Ypresian) - Middle Eocene (Lutetian).|Coal, sandstone and shale.|organic rich sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Arthur Metamorphic Complex|647|||||Yes|Supergroup|Formal|Other new published name|Described|||||Cambrian|522|12|||Tonian|777|7|isotopic, U/Pb|||||No|63167||||||Said to be tectonic rather than stratigraphic name in 1989, but more recently appears to be used as a stratigraphic unit. This Lithology recorded is to be used for Tasmania 1:1million geological map, National Maps Project.  Subdivided informally into 4 units, -Pa Arthur Metamorphic Complex, -Paa, -Pat including Keith Schist, -Pap. Protolith age: ?Mesoproterozoic - ?Neoproterozoic.|Pelitic, dolomitic and quartzose schist with interbanded amphibolite.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||17-JAN-23
Ashley Basalt|715|||||Yes|Formation, beds|Formal|Other new published name|Described|||||||||eruption|||||||||No|24548||||||Of Wells (1957) in describing the Deloraine basalts.  See also Ashley basalt. last used 1973.|Widespread, dense, fine-grained, olivine-poor, amydaloidal, blue-grey rock. Includes the Exton Member.|basic volcanic rock|||N||17-JAN-23
Atkins Range Amphibolite|40972|||||Yes|Formation, beds|Informal|Other new published name|Reserved||||||||||||||||||No|||Calver C.R., Turner N.J., McClenaghan M.P. et al.|07-MAY-04|||Described but not named in Calver C.R., Turner N.J., McClenaghan M.P. & McClenaghan J. 1990. Geological atlas 1:50,000 series, sheet 80 (8112S).|Amphibolite (in Proterozoic metamorphosed dominantly siliceous shelf sequences).|high grade metamorphic rock|||N||17-JAN-23
Austral Creek Siltstone|778|Hill Shale|8348|||Yes|Formation, beds|Formal|Other new published name|Described|Eldon Group|27768|||Devonian||||deposition|Wenlock||||||60||No|43547||||||Mapped by Taylor (1954) as Hill Shale between Keel and Florence Formations, but later defined in the Zeehan area as Austral Creek Formation (Gill and Banks 1950).|Thin bedded grey and green-grey siltstone (laminated) and fine-grained quartzite in the Duck Creek Syncline; mudstone in Zeehan area.|siliciclastic sedimentary rock|||N||17-JAN-23
Babel Island Granite|830|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Babel Island Suite|31557|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Formerly Babel Island Suite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type. Medium- to coarse-grained, equigranular alkali-feldspar granite, containing miarolitic cavities and with widespread pegmatitic and porphyry intrusions, quartz, K-feldspar, plagioclase, red-brown biotite.|acid intrusive rock|||Y|S-type|17-JAN-23
Babel Island Suite|31557|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Lower Devonian|||||Lower Devonian||||||||No|44105||||||Includes Babel Island Granite.|Fractionated, S-type granites.|acid intrusive rock|||Y|S-type|17-JAN-23
Back Creek Slate|847|||||Yes|Formation, beds|Informal|Unknown or process pending|Mentioned||||||||||||||||||No|40136||||||Presumably Ordovician. Not to be confused with the Back Creek nomenclature of NSW / QLD Back Creek Group.|||||N||17-JAN-23
Bakes Oil Shale|916|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||deposition|||||||||No|24547||||||Same as Tasmanite Oil Shale (Newton, 1875) - not a formal name - it is an impure coal, transitional between cannel coal and oil shale. See also Bakes Oil Shale Member.||siliciclastic sedimentary rock|||N||17-JAN-23
Bald Hill Complex|941|Bald Hill complex|24683|||Yes|Group, Suite|Informal|Variation of published name|Mentioned||||||||||||||||||No|37044||||||See also the informal Bald Hill ultramafic complex . Names may be invalid if Victoria has priority with its Bald Hill Volcanic Complex.|||||N||17-JAN-23
Balfour Subgroup|40970|Balfour slates and sandstones|73348|||Yes|Subgroup|Formal|Variation of published name|Fully described|Rocky Cape Group|27555|||Mesoproterozoic|1261|22|inferred, overlying unit|deposition|Mesoproterozoic|1346|12|inferred, underlying unit|maximum depositional age|||TAS|No|63250||Everard, J.L., Seymour, D.B., Reed, A.R et al||||Everard, J.L., Seymour, D.B., Reed, A.R., McClenaghan, M.P., Green, D.C., Calver, C.R., Brown, A.V. 2007. Regional geology of the southern Smithton Synclinorium. Redefined in RefID 67502 (2007): Composite type section; Approximately equivalent to "Balfour slates and sandstones" (Ward et al. 1911). Smithton-Rocky Cape region. Subdivided into 10 named and unnamed subunits. Minimum depositional age constrained at 1261+\-22 Ma authigenic monazite age from overlying Cowrie Siltstone. Maximum age constrained by a) max. depositional age of Cassiterite Creek Quartzite (1426+/-28 Ma). This unit is not the basal unit of the Subgroup. Another constraint is the authigenic monazite age of the underlying Lagoon River Quartzite - 1346+/-12 Ma.|Trough cross-bedded and gutter-cast quartz sandstone interbedded with siliceous and carbonaceous siltstone, fining up to predominantly laminated chloritic siltstone, lesser micaceous sandstone, and rare quartzite. Mudstone and shale.|siliciclastic sedimentary rock|||N||27-APR-23
Barn Bluff Conglomerate|1115|||||Yes|Formation, beds|Formal|Other new published name|Described|Lower Parmeener Supergroup|10795|||Cisuralian||||deposition|Cisuralian||||||||No|36817|||||||||||N||17-JAN-23
Barnbougle Member|1122|||||Yes|Member, phase|Formal|Other new published name|Described|Anderson Bay Formation|418|||Holocene||||deposition|Holocene||||||||No|35466|||||||||||N||17-JAN-23
Barnetts Member|1128|||||Yes|Member, phase|Formal|Other new published name|Described|Springs Sandstone|17220|||Lower Triassic||||deposition|Triassic||||||55||No|63868||||||Also referred to as Barnetts Sandstone - names used interchangeably and unclear which takes precedence.|Feldspathic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Barrington Chert|1190|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Cambrian Series 2|||inferred, biostratigraphic correlation|deposition|Ediacaran||||||1000||No|36788||||||One of 5 major stratigraphic units in Cambrian Dial Range Trough. Correlate of Success Creek Group?|Grey to black, thinly laminated to bedded chert. Soft-sediment slump folds, intraformation breccias, internal unconformity, minor interbeds of mudstone, sandstone and chert-derived conglomerate. Contains siliceous (probably Cambrian) sponge spicules.|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Bass Megasequence|41024|||||Yes|Clan|Sequence stratigraphy|Sequence strat published|Described|||||upper Malvacipollis diversus|51.5||biozone||Tricolporites lilliei|78|||||||No|14235||||||Age: Campanian - Ypresian (Late Cretaceous - Early Eocene).||siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Bass Pyramid Granite|1238|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|Granite|acid intrusive rock|||Y||17-JAN-23
Battery Hills Granite|1258|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Poimena Suite|31626|Middle Devonian||||intrusion|Devonian||||||||No|42726||||||Formal name not intended.||acid intrusive rock|||Y||17-JAN-23
Baxter Formation (TAS)|23367|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Pleistocene|||||Pleistocene||||||||No|41993||Fitzsimons S.J.|17-MAR-89|||Invalid reservation. Already publ. in Victoria. BD 91/27352. Checked in 91/27352 and does refer to TAS unit not cross over unit...is a 1.2m of organic silty sand that overlies Huxley Formation. Unclear if name replaced?|Organic-rich fluviatile silts with normal magnetic polarity.|fine grained siliciclastic rock|||N||17-JAN-23
Beaconsfield Ultramafic Complex|35843|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Cambrian|||||Cambrian||||||||No|23326||||||Lithology recorded is that to be used for Tasmania 1:1million geological map, National Maps Project.|Layered peridotite, serpentinite and associated rocks.|ultramafic intrusive rock|metamorphosed ultramafic rock||N||17-JAN-23
Beecraft Megabreccia|1383|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Middle Cambrian|||||Middle Cambrian||||||150||No|45087||||||Of Burns (1964). One of 5 major strat.units in Cambrian Dial Range Trough.|Blocks of chert and other lithologies in a matrix of lithic wacke and conglomerate.|siliciclastic sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Belfast Mudstone|1415|Belfast Mudstone Member|1413|||Yes|Formation, beds|Formal|Other new published name|Defined|Sherbrook Group|16826|||Santonian||||deposition|Turonian||||||1362|VIC|No|48581|48581|||||Of McQueen, A.F. (1961)? This rank preferred in SA (Revisions to Stratigraphic Nomenclature of the Otway Basin, South Australia. GSSA Quarterly Notes 116 (1990)). Was first nominated as a member of the Paaratte Formation by Bock and Glenie (1965); however Reynolds (1971) reinstated formation status.|Glauconitic dark mudstones.|siliciclastic sedimentary rock|||N||17-JAN-23
Bell Shale|1421|Bell Formation|1419|||Yes|Formation, beds|Formal|Variation of published name|Described|Eldon Group|27768|||Pragian||||deposition|Lochkovian||||||425||No|43461||||||See also Bell Formation. Giddean age range is 410-401 Ma.|Comprises an upper; dominantly mudstone with marine macrofossils; and a lower: thin bedded, very fine-grained quartz sandstone, siltstone and mudstone; with marine macrofossils.|siliciclastic sedimentary rock|||N||17-JAN-23
Ben Lomond Granite|1453|Ben Lomond granite|1455|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Babel Island Suite|31557|Middle Devonian|352||isotopic, K/Ar|metamorphism|Devonian|377||isotopic, Rb/Sr|intrusion||||No|73369||||||Of Blisset (1959). G.S..Bull. 46, p27. Traditional name for Henbury Granite, being part of the Ben Lomond Batholith.|Mostly coarse-grained, porphyritic biotite granite with local textural variations and contains muscovite, tourmaline and topaz.|acid intrusive rock|||Y|S-type|17-JAN-23
Benjamin Limestone|1485|||||Yes|Formation, beds|Formal|Other new published name|Defined|Gordon Group|7586|||Bolindian||||deposition|Gisbornian||||||1200|TAS|No|30277|30277||||||Predominantly interbedded microcrystalline peritidal dolomitic micrite, dolomite and calcarenite.|carbonate sedimentary rock|||N||17-JAN-23
Benson Peak Sandstone|1490|||||Yes|Formation, beds|Formal|Other new published name|Described|Parameener Supergroup|39316|||Permian||||deposition|Permian||||||||No|30155||||||||siliciclastic sedimentary rock|||N||17-JAN-23
Bernafai Volcanics|1513|||||Yes|Formation, beds|Formal|Other new published name|Described|Ahrberg Group|160|||Ediacaran|580|||eruption|Cryogenian|650|||||||No|45003|||||||Mafic lavas, mostly fine-grained and weakly foliated. Schistose rocks, poorly cleaved, slaty or phyllitic; fragmental volcanic rocks. Tholeiitic basalt, minor diamictite and pelite; includes picrites near the base.|metamorphosed basic igneous rock|||N||17-JAN-23
Berriedale Limestone|1522|Berriedale limestone|1523|||Yes|Formation, beds|Formal|Other new published name|Described|Cascades Group|3730|||Artinskian||||deposition|Artinskian||||||100||No|43477||||||See also Berriedale Formation.|Pale grey, coarse-grained crinoidal limestone + subordinate micrite and shale; contains meta-bentonite.|carbonate sedimentary rock|||N||17-JAN-23
Beulah Granite|1557|Beulah Microgranite|1558|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Late Cambrian|493.5|3.9|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation|Late Cambrian|493.5|3.9|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|63825|||||||I-type biotite-hornblende monzogranite. Major andesitic to dacitic intrusive.|acid intrusive rock|||Y|I-type|17-JAN-23
Beulah andesite|83240|Beulah Granite|1557|||Yes|Formation, beds|Informal|Variation of published name|Mentioned|Mount Read Volcanics|13057|||Furongian|||inferred||Miaolingian|||inferred|||||No|73320||||||Peobably a variation on Beulah Microgranite, Beulah Granite, Beulah Formation. Of Mount Read Volcanics. Described along with Anthony Road Andesite, Que-Hellyer Volcanics as andesitic lavas, breccias and intrusive rocks.|||||N||17-JAN-23
Bicheno Granite|24717|Bicheno Adamellite|33472|||Yes|Formation, beds|Formal|Other new published name|Described|||Boobyalla Suite|31666|Upper Devonian|361||isotopic, K/Ar|intrusion|Middle Devonian|381|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726||||||Formal name not intended  in 1991, but formalised in 2005. See also Bicheno Adamellite. One of the informally grouped South Eastern Tasmania Granites.|S-type, reduced, felsic, coarse-grained, fractionated body of syenogranite to alkali-feldspar granite, faulted against Jurassic dolerite|acid intrusive rock|||Y|S-type|17-JAN-23
Billop Sandstone|27339|Billop Formation|26391|||Yes|Formation, beds|Formal|Variation of published name|Described|Golden Valley Group|27784|||Permian||||deposition|Permian||||||8||No|24547||||||Part of Parmeener Supergroup.|A dirty pebbly, richly-fossiliferous sandstone; locally arkosic and with conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Birchs Inlet Volcanics|73143|||||Yes|Formation, beds|Formal|Variation of published name|Described|||||Early Cambrian||||eruption|Early Cambrian||||||||No|44135||||||Adamsfield-Jubilee region. See also the misspelt Birch Inlet Volcanics and the informal Birchs Inlet volcanics.|Massive basalt, mostly fine-grained with chlorite amygdales. Glomerophyric plagioclase & augite partly replaced by sericite & chlorite respectively, secondary epidote, albite, quartz.|basic volcanic rock|||N||17-JAN-23
Bird Phyllite|40973|||||Yes|Formation, beds|Formal|Other new published name|Defined|Arthur Metamorphic Complex|647|||Cryogenian|||inferred|deposition|Tonian|769|5||maximum depositional age|||TAS|Yes|||||Forsyth, S., Cummings, G.|24-SEP-19|Provisionally named the Bird Phyllite in: Everard, J.L. 1999. a blue amphibole occurrence from the Flowerdale River, northern Arthur Lineament.  Tasmanian Geological Survey Record 1999/05, Mineral Resources Tasmania. PROPOSED PUBLICATION: Keith, Folly, Milabena and Calder 1:25000 maps (to be amended), Mulder et al. (in prep.).|Dominantly dark grey to grey-green phyllite, with lesser pelitic schist, foliated quartz arenite and well-bedded dolostone.Rare basal siliciclastic cobble-pebble conglomerate observed outside type section.|metasedimentary siliciclastic rock|sedimentary rock||N||17-JAN-23
Birthday Granite|1736|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Upper Devonian||||intrusion|Devonian||||||||No|42726||||||Formal name not intended.|S-type. Peraluminous pale grey-white fine-coarse grained biotite adamellite/alkali-feldspar granite: quartz, perthitic K-feldspar (white), plagioclase, biotite, muscovite. Accessory apatite, zircon, ilmenite, monazite, tourmaline, fluorite, topaz.|acid intrusive rock|||Y||17-JAN-23
Bischoff porphyries|73648|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Devonian|||||Devonian||||||||No|63540||||||Not to be confused with Mount Bischoff nomenclature, except see also Mount Bischoff Porphyry.|I-type granite, felsic; strongly fractionated, reduced.|acid intrusive rock|||Y|I-type|17-JAN-23
Bishop Tuff|1740|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||eruption|||||||||No|41855|||||||||||N||17-JAN-23
Black Bluff Range Dolerite|40969|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||Corbett, K.D., Pemberton, J., Vicary, M.J|27-MAR-07|||Used as an informal name (small 'd' dolerite) in: Corbett, K.D., Pemberton, J., Vicary, M.J. 1991.  Mt Read Volcanics Project Geological Report 4.|Tholeiitic dolerite (Black Bluff Range).|basic intrusive rock|||Y||17-JAN-23
Black River Dolomite|1824|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Togari Group|23016|||Cryogenian|641|5|isotopic, Re/Os|minimum depositional age|Tonian|750||inferred, geological correlation|maximum depositional age|250|800||No|41908||||||Of the Smithton Basin. Wrongly correlated with Smithton Dolomite in past. 800m thick.|Interbedded dolomite, chert, siltstone and black mudstone; discontinuous units of dolomitic diamictite.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Blackmans Lagoon Member|1867|||||Yes|Member, phase|Formal|Other new published name|Described|Anderson Bay Formation|418|||Holocene||||deposition|Holocene||||||||No|35466|||||||||||N||17-JAN-23
Blackwood Conglomerate|1880|Blackwood Formation|1881|||Yes|Formation, beds|Formal|Variation of published name|Described|Bogan Gap Group|2080|||Late Permian||||deposition|Late Permian||||||1||No|63868||||||Formerly Blackwood Formation. Part of Parmeener Supergroup. Nomenclatural history unclear - appears to have previously been of Bogan Gap Group ANDFerntree Group? Its distinctive lithology makes this unit an excellent marker horizon.|A prominent conglomeratic sandstone with varying pebble content; sparse fossils.|siliciclastic sedimentary rock|||N||17-JAN-23
Bluestone Bay Granodiorite|79585|Bluestone Bay Granite|2011|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Gardens Suite|31503|||Upper Devonian|371||isotopic, Rb/Sr|intrusion|Upper Devonian|374||isotopic, Rb/Sr|||||No|69050|||||||Biotite-hornblende granodiorite, not foliated.|acid intrusive rock|||Y|I-type|17-JAN-23
Bluff Quartzite|2020|||||Yes|Formation, beds|Formal|Variation of published name|Described|Detention Subgroup|28502|||Neoproterozoic|||inferred, lithostratigraphic correlation||Mesoproterozoic|||inferred, lithostratigraphic correlation|||||No|30877||||||Originally of Spry (1957). Assumed still part of Detention Subgroup, Rocky Cape Group. Age from Subgroup.|||||N||17-JAN-23
Bluff River Formation|2022|Bluff River Pebbly Siltstone|2023|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Cisuralian||||deposition|Cisuralian||||||||No|36817|||||||||||N||17-JAN-23
Bogan Gap Group|2080|Ferntree Group|6611|||Yes|Group, Suite|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Late Permian|||||Late Permian||||||248|TAS|No|34012|34047|||||Defined by Bravo and Pike (1969). Rocks of this group were formerly correlated with the Ferntree Group in the Central Plateau area but this was later recognised as a mis-correlation (per email S.Forsyth, 11/12/08).|Blue-grey and grey mudstone, siltstone and sandy siltstone beds with relatively sparse pebbles or dropstones.|fine grained siliciclastic rock|||N||17-JAN-23
Bold Head Granite|2121|Bold Head Adamellite|2120|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Grassy Suite|31585|Upper Devonian||||intrusion|Upper Devonian||||||||No|42726||||||See also Bold Head Granodiorite. Possibly the same unit as as Grassy Granodiorite? (per email from S.Forsyth June 2008). May be an outlier of the Sandblow Granite, offset by the Grassy River Fault.|I-type granite, mafic; unfractionated, oxidised.|acid intrusive rock|||Y|I-type|17-JAN-23
Bold Head Granodiorite|33457|Bold Head Adamellite|2120|||Yes|Formation, beds|Formal|Variation of published name|Described|||Grassy Suite|31585|Carboniferous||||intrusion|Upper Devonian||||||||No|44105||||||On King Island. See also Bold Head Granite. Possibly the same unit as as Grassy Granodiorite? (per email from S.Forsyth June 2008). May be an outlier of the Sandblow Granite, offset by the Grassy River Fault. This name may be obsolete [CEB Jan 2017].|monzogranite-granodiorite; porphyritic with large pink K-feldspar phenocrysts|acid intrusive rock|||Y|I-type|17-JAN-23
Bonds Range Porphyry|30389|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Drumian||||eruption|Drumian||||||||No|43131||||||Accidental formalization of Bonds Range porphyry.|Quartz-feldspar porphyry that may contain biotite and/or hornblende.|acid intrusive rock|||Y||17-JAN-23
Boobyalla Granite|23407|Boobyalla granite|2190|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian|370||isotopic, Rb/Sr|intrusion|Upper Devonian|380||isotopic, Rb/Sr|||||No|37797||A.R.Bowden|01-MAY-79|||See also Boobyalla Adamellite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |S-type biotite-garnet granite -  adamellite/granite pluton containing biotite and minor amounts of garnet and/or cordierite.|acid intrusive rock|||Y|S-type|17-JAN-23
Boobyalla Suite|31666|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Middle Devonian|370||isotopic, Rb/Sr||Middle Devonian|380||isotopic, Rb/Sr|||||No|42726|||||||S-type. Strongly crystal-fractionated; high Rb and low Sr. Peraluminous.|acid intrusive rock|||Y|S-type|17-JAN-23
Bott Conglomerate|2359|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Late Cambrian||||deposition|Middle Cambrian||||||||No|36788||||||Fossey Mountains region. Part of Dundas Group according to 2003 digital map of Tasmania.|||||N||17-JAN-23
Boulder Point Granodiorite|68774|||||Yes|Formation, beds|Informal|Resvd name published|Mentioned|||||Devonian||||intrusion|Devonian||||||||No|71730||John Everard (MRT)|21-APR-05|||Body described by Baillie (1986). Possibly intruded by Ansons Bay Granite but contacts obscured. Considered by Baillie to be a (very large) xenolith within latter. Coastal outcrops over c. 300m near 604700mE 5472800mN (AGD66). See Boulder Point Granite.|Equigranular medium- to coarse-grained biotite hornblende granodiorite.  I-type granite, mafic to felsic, unfractionated, reduced.|acid intrusive rock|||Y|I-type|20-AUG-23
Boullanger Formation|23412|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian|||||||TAS|No|69854|39579|Geological Survey of Tasmania|03-AUG-79|||Age: Lower Bernacchian (GSA Special Publication 15 p302)|Non-marine beds consisting mainly of dark, carbonaceous, micaceous and pyritic mudstone with subordinate lighter-coloured, flaser-bedded siltstone with much bioturbation and abundant hydroplastic structures.|fine grained siliciclastic rock|||N||17-JAN-23
Bowens Jetty Sandstone|2416|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|Middle Arm Group|11778|||Kazanian||||deposition|Kungurian||||||||No|30889||||||Of Green (1959).||siliciclastic sedimentary rock|||N||17-JAN-23
Bowlers Lagoon Member|28394|||||Yes|Member, phase|Formal|Other new published name|Described|Anderson Bay Formation|418|||Holocene||||deposition|Holocene||||||||No|35466|||||||||||N||17-JAN-23
Bowry Formation|2438|Bowry Creek Member|21308|||Yes|Formation, beds|Formal|Variation of reserved name|Described|Timbs Group|26945|||Early Cambrian|777|7|inferred, intrusive relationship|minimum depositional age|Neoproterozoic|1100||isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|42551||||||Previously referred to as part of "Timbs Group". Originally reserved as Bowry Creek Member by Turner (1987).Detrital zircon maximum age 1180 Ma U-Pb SHRIMP (Turner et al., 1998).|Distinct unit of pelitic schist with amphibolite and associated pyrite-magnetite lenses, magnesite and dolomite.|metasedimentary siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Boyd River Formation|2461|Boyd Formation|21312|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Middle Cambrian||||deposition|Middle Cambrian||||||||No|63169||||||Reserved as Boyd Formation. Surrounded by rocks of the Ragged Basin Complex.  In Adamsfield-Jubilee region.|Quartzite conglomerate, and turbiditic quartzwacke, poorly sorted turbiditic sandstone, siltstone and mudstone; contains (probably) Middle Cambrian fossils.|siliciclastic sedimentary rock|||N||17-JAN-23
Boyes River Ultramafic Complex|2464|||||Yes|Group, Suite|Informal|Other new published name|Described|||||Cambrian|||||Cambrian||||||||No|41793||||||See also Boyes River Complex.|Sheared blocky serpentinite, altered from coarsely interlayered ultramafics - layered dunite and harzburgite, layered pyroxenite and dunite.|metamorphosed ultramafic rock|||N||17-JAN-23
Brady Formation|2474|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Upper Parmeener Supergroup|18944|||Carnian||||deposition|Ladinian||||||165||No|24549||||||See also Lexicon. SK55-6. See also Brady formation.|Feldspathic sandstone and dark grey shale, in about equal amounts; carbonaceous shale and coal bands are common|siliciclastic sedimentary rock|||N||17-JAN-23
Brassey Hill Harzburgite|79476|Brassey Hill harzburgites|2510|||Yes|Formation, beds|Formal|Variation of published name|Described|Heazlewood River Complex|8232|||Middle Cambrian|||||Early Cambrian||||||||No|69874||||||Is this a formalisation of Brassey Hill harzburgites (unit no. 2510)?|Harzburgite, showing a complete range of adcumulate to poikilitic orthocumulate textures. Layering is exceptionally well developed between cyclic units of dunite, harzburgite, olivine orthopyroxenite and orthopyroxenite.|ultramafic intrusive rock|||Y||17-JAN-23
Breadalbane Lignite|30095|||||Yes|Formation, beds|Formal|Other new published name|Briefly described||||||||||||||||||No|43088|||||||||||N||17-JAN-23
Brewery Junction Formation|2528|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Dundas Group|26529|||Late Cambrian||||deposition|Middle Cambrian||||||||No|31464|||||||Conglomerate.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Bridport Suite|31540|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||Tulendeena Supersuite|31538|Middle Devonian|||||Middle Devonian||||||||No|42726||||||In Bassian Batholith of Chappell et al 1991.|||||Y||17-JAN-23
Bronzite Hill Orthopyroxenite|79477|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Heazlewood River Complex|8232|||Middle Cambrian|||||Early Cambrian||||||||No|69874|||||||Mostly massive adcumulates of magnesian orthopyroxene, chromian spinel; rare harzburgite.|ultramafic intrusive rock|||Y||17-JAN-23
Brumby Marl|2707|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||Permian||||deposition|Permian||||||||No|43474||||||Same unit as Brumby Mudstone - authors seem unsure whether this unit is part of the upper Quamby Group or basal Golden Valley Group?|||||N||17-JAN-23
Brumby Mudstone|2708|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||||||deposition|||||||||No|43474||||||See also Brumby Marl - authors seem unsure whether this unit is part of the upper Quamby Group or basal Golden Valley Group?||siliciclastic sedimentary rock|||N||17-JAN-23
Bubs Hill Limestone|24774|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||deposition|||||||||No|40127||||||Possible misspelling of Bubbs Hill?  But place name is actually Bubs Hill so should be correct.||carbonate sedimentary rock|||N||17-JAN-23
Bulgobac Porphyry|40958|||||Yes|Formation, beds|Reserved|Other new published name|Briefly described|||||||||eruption|||||||||No|||Corbett K.D., Komyshan P.|30-AUG-16|||Described but not named in: Corbett K.D., Komyshan P. 1989.  Geology of the Hellyer-Mt. Charter area. Geol. Rep. Mt Read Volc. Proj., Tasm. 1.  Discussed with Keith Corbett who suggested this as the most appropriate name. Published informally as Bulgobac porphyry in 2014.|Quartz-feldspar porphyry.|acid igneous rock|||N||17-JAN-23
Bull Creek Formation|2875|||||Yes|Formation, beds|Formal|Unknown or process pending|Defined|||||Late Cambrian||||deposition|Middle Cambrian||||||||No|29626||||||Name introduced on the Sheffield 1-mile sheet (1959), and defined in: Burns, K.L., 1961. Cambrian Rocks of the Dolcoath Anticline.  Tas. Dept. Mines Tech. Rep. 5: 34-44.  See also: Jennings, I.B., 1963. Geological Survey explanatory report, one mile geological map series K/55-6-45 Middlesex. Tasmania Department of Mines p41-51.   Not related to Pleistocene Bull Rivulet Formation.|||||N||17-JAN-23
Bundella Mudstone|2985|Bundella Formation|2982|||Yes|Formation, beds|Formal|Unknown or process pending|Fully described|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Asselian||||||118||No|43474||||||Age: Tamarian. See also Bundella Formation.|Richly fossiliferous, pebbly marine mudstone with common dropstones. Stratigraphic distribution of crinoids.|siliciclastic sedimentary rock|||N||17-JAN-23
Burnt Gully Limestone|3096|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||||No|41696||||||Member of Castle Carey Formation?|Dominantly bioclastic limestone|carbonate sedimentary rock|||N||17-JAN-23
Butler Island Formation|23448|||||Yes|Formation, beds|Formal|Other new published name|Described|Gordon Group|7586|||Middle Ordovician||||deposition|Lower Ordovician||||||||No|36957||G.T.Roberts|01-DEC-78||||Shallow-marine sandstone-, mudstone +/- conglomerate +/- limestone sequences; Ordovician fossils and trace fossils in places.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Cabbage Tree Conglomerate Member|79479|Cabbage Tree Conglomerate|3257|||Yes|Member, phase|Formal|Variation of published name|Briefly described|Salisbury Hill Formation|33788|||Lower Ordovician||||deposition|Lower Ordovician||||||50||No|69874|||||||Pebble conglomerate and sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Cableway Formation|23451|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||||||deposition|||||||||No|41993||Fitzsimons S.J.|17-MAR-89|||||siliciclastic sedimentary rock|||N||17-JAN-23
Calstock Formation|40003|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Dundas Group|26529|||Cambrian||||deposition|Cambrian||||||580||No|24548|||||||Subgreywacke and slate|siliciclastic sedimentary rock|||N||17-JAN-23
Cambrian felsic volcanics 76525|76525|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Middle Cambrian|500|||eruption|Middle Cambrian|505|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Mainly felsic volcanics, including lavas and tuffs. Association may include volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Cambrian granites 76527|76527|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Late Cambrian|495|||intrusion|Middle Cambrian|505|||||||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
Cambrian sedimentary rocks 76535|76535|||||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.|Predominantly sedimentary rocks; includes sedimentary rocks of low metamorphic grade and diapiric breccias|sedimentary rock|||N||17-JAN-23
Cambrian serpentinites 76523|76523|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Middle Cambrian|505||||Middle Cambrian|510|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Serpentinised ultramafic rocks; includes ophiolites|metamorphosed ultramafic rock|||N||17-JAN-23
Cameron Inlet Formation|3396|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Piacenzian||||deposition|Zanclean|||||||TAS|No|33358|33358|||||Age: 3.5-2.5Ma. In the NE Tasmania - Flinders Island area. See also Cameron Formation.|Fine silty coquina limestones and sands.|carbonate sedimentary rock|||N||17-JAN-23
Cape Barren Granite|26456|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Middle Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Formal name not intended.||acid intrusive rock|||Y||17-JAN-23
Cape Frankland Granite|3488|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Musselroe Suite|40881|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the  2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type adamellite/granite containing biotite and minor amounts of garnet and/or cordierite.|acid intrusive rock|||Y||17-JAN-23
Cape Grim beds|83237|Cape Grim Beds|3490|||Yes|Formation, beds|Informal|Variation of published name|Unpublished|||||Miocene|||inferred||Oligocene|||inferred|||||No|||||||In current nomenclature Cape Grim Beds should be Cape Grim beds. Ref ID 73334 says calcarenite includes Upper Longfordian foraminifera. [according to GeoWhen database last updated in 2005,  this is an Australian Stage from 27.5 to 16.5 Ma].|Breccia, conglomerate and fossiliferous calcarenite with Upper Longfordian foraminifera.||||N||17-JAN-23
Cape Portland Complex|27733|Cape Portland complex|3518|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Albian|101|2.6|||Albian|102|2.6||||||No|40811|||||||near-saturated to saturated intermediate suite of appanitic rocks: intrusive (augite-hornblende) porphyry complex, associated lamprophyric dyke swarm (spessartites and kersantites) and andesitic lava flows|intermediate intrusive rock|exotic composition igneous rock||N||17-JAN-23
Cape Sir John Granodiorite|23466|Cape Sir John Granite|3525|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Wybalenna Suite|31658|Middle Devonian|361|3||intrusion|Lower Devonian|361|3||||||No|36374||D.J.Cocker|24-OCT-74|||Card. In press according to DL1980. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). One of the Furneaux Islands granites on Cape Barren Island. Also referred to informally as Cape Sir John Granite.|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Cape Sorell Ultramafic Complex|40967|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Cambrian|||||Cambrian|514|5||||||No|69874||||||Brown, A.V. 1989. Eo-Cambrian-Cambrian.  In: Burrett, C.f., Martin, E.L. (ed.): Geology and Mineral Resources of Tasmania.  Geological Society of Australia Inc. Spec. Publ. 15.|Layered peridotite, serpentinite and associated rocks.|ultramafic intrusive rock|metamorphosed ultramafic rock||N||17-JAN-23
Cape Wickham Granite|69914|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Tonian|760|12|isotopic, Pb/Pb|intrusion|Tonian|762|14|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|61263||||||See also Cape Wickham granite. See Loorana Granite definition for source of  ages. Minumum age was Pb/Pb SHRIMP age from zircon.|Medium-grained, K-feldspar-porphyritic biotite monzogranite to alkali feldspar granite; late minor intrusions of more mafic biotite granodiorite, and dykes and sheets of more leucocratic granite, aplite, and minor pegmatite resembling migmatites.|acid intrusive rock|||Y|I-type|17-JAN-23
Caroline Creek Formation|79562|Caroline Creek Sandstone|3655|||Yes|Formation, beds|Formal|Variation of published name|Described|Gordon Group|7586|||Darriwilian|||biozone|deposition|Floian|||biozone|||||No|69875||||||Previously Caroline Creek Beds, Sandstone.|Basal diachronous, littoral to shallow marine, siliceous pebble conglomerate and quartz sandstone, bioturbated siltstone that passes conformably up to calcareous siltstone transitional to limestone.|siliciclastic sedimentary rock|||N||17-JAN-23
Cascades Group|3730|||||Yes|Group, Suite|Formal|Other new published name|Described|Parmeener Supergroup|14900|||Artinskian|||||Sakmarian||||||100||No|43474||||||Age: Bernacchian.|Basal siltstone; thick limestone sequences consisting of calcarenite and calcareous mudstone, richly fossiliferous, infrequent small dropstones.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Cashions Creek Limestone|3738|Cashions Creek limestone|3739|||Yes|Formation, beds|Formal|Other new published name|Defined|Gordon Group|7586|||Gisbornian||||deposition|Darriwilian||||||150|TAS|No|30277|30277||||||Oncolitic calcarenite probably deposited as offshore shoals or bars.|carbonate sedimentary rock|||N||17-JAN-23
Cassiterite Creek Quartzite|78542|Specimen Hill Siltstone|78556|||Yes|Formation, beds|Formal|Other new published name|Fully described|Balfour Subgroup|40970|||Tonian|800||inferred, geological correlation||Ectasian|1426|38|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||350|TAS|No|67502||||||Age poorly constrained by age of dolerite dykes intrusions into other Rocky Cape Group units, and slate ages (643+/-10Ma), and biostratigraphy and isotope chemostratigraphy of overlying Black River Dolomite (~750-650 Ma).|Upwardly fining packages of tabular-bedded cream quartz sandstone to seven metres thick, interbedded with variably laminated siliceous (often erosion resistant) grey siltstone of similar thickness, and carbonaceous shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Castle Carey Mudstone|28441|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||||No|41696|||||||Top of unit: marine fosiliferous mudstone, siltstone and minor sandstone and bioclastic limestone. Towards base: mudstone, siltstone and minor poorly sorted sandstone. Uncommon marine fossils.|carbonate sedimentary rock|||N||17-JAN-23
Castle Rock Point Granite|3759|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Wybalenna Suite|31658|Middle Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Formal name not intended.||acid intrusive rock|||Y||17-JAN-23
Cateena Group|3782|Cateena Mudstone|3783|||Yes|Group, Suite|Formal|Other new published name|Briefly described|Mount Read Volcanics|13057|||Middle Cambrian|||||Middle Cambrian||||||1000||No|32744||||||Of Burns (1964).  Probably an informal reference to Cateena Mudstone ?[DPJUN03].|Mudstone, lithic wacke, feldspathic sandstone, conglomerate and minor fesic volcanic rocks; distinctive basal conglomerate. Fossiliferous.|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Catos Creek Granodiorite|81977|Catos Creek Microgranodiorite|3802|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Scamander Tier Suite|31506|||||||||||||||TAS|No|71730|||||||I-type granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Cattley Sandstone|79480|||||Yes|Formation, beds|Formal|Other new published name|Described|Owen Group|34165|||Lower Ordovician||||deposition|Lower Ordovician||||||350||No|69874|||||||Distinctive basal pink granule-pebble conglomerate, fining-upwards into pink, coarse sandstone with interbeds of granule-pebble conglomerate; minor basalt flows and volcaniclastic rocks.|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Caudreys Hill Pyroxenite|79482|Caudreys Hill pyroxenites|3817|||Yes|Formation, beds|Informal|Variation of published name|Described|Heazlewood River Complex|8232||||||||||||||||No|69874||||||Both this unit and its supposed constituent, the Caudreys Hill Orthopyroxenite, are variations on the informally named Caudreys Hill orthopyroxenites (unit no. 3817).|Lower zone of olivine orthopyroxenite adcumulates, grading upwards into plagioclase-bearing pyroxenite mesocumulates and orthocumulates.|ultramafic intrusive rock|||Y||17-JAN-23
Cave Quartzite|24833|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Detention Subgroup|28502|||Neoproterozoic|||||Mesoproterozoic||||||||No|30877||||||Of Spry (1957). Only mappable locally in the Rocky Cape area, and not regionally.|||||N||17-JAN-23
Cenozoic mafic volcanics 76538|76538|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Holocene|0|||eruption|Paleocene|65|||||||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
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 Plateau moraine|79575|Central Plateau Till|3867|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Pleistocene|.031||||Pleistocene|.053|||||||No|69880||||||Appears to be a variation on unit no. 3867: Central Plateau Till.|Glacial moraine, block streams, glacis (slopes) and block screes of dolerite, dolerite solifluction deposits (weathered mass wasting of boulders and brown to reddish-brown clay matrix).|regolith|||N||17-JAN-23
Central Volcanic Complex|3868|||||Yes|Group, Suite|Formal|Other new published name|Described|Mount Read Volcanics|13057|||Late Cambrian|495|9|isotopic, U/Pb|eruption|Middle Cambrian|503|7|isotopic, U/Pb|||||No|43242||||||Informal association in Mt Read Volcanics. Age: ~495+/-9Ma (U-Pb zircon). Flanked to the west by the coeval Western Volcano-sedimentary Sequence.|Highly complex suite, predominantly of feldspar-phyric rhyolite and dacite lavas, with ignimbrite tuffs, intrusives and pyroclastics; local porphyritic andesite as lenses.|metamorphosed igneous rock|||N||17-JAN-23
Chamberlain Shale|23480|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|37045||G.Green|26-MAY-75|||||siliciclastic sedimentary rock|||N||17-JAN-23
Chamouni Formation|23481|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||||||deposition|||||||||No|42106||Fitzsimons S.J.|17-MAR-89|||||sediment|||N||17-JAN-23
Champion Schist|79056|||||Yes|Formation, beds|Formal|Other new published name|Defined|Arthur Metamorphic Complex|647|||Ediacaran|||inferred, geological correlation||Cryogenian|||inferred, geological correlation||||TAS|Yes|69873||||Forsyth, S., Cummings, G.|24-SEP-19|Everard et al. (1996); Everard (1999). Arthur River area. TiO2 content histogram. Chemistry very similar to amphibolites from Timbs Group and metabasalts from Spinks Creek Volcanics and Ahrberg Group.|Chloritic schist, with minor pelitic schist, phyllite, dolomite and magnesite, and +/-concordant amphibolite bodies.|low-intermediate grade metamorphic rock|high grade metamorphic rock||N||17-JAN-23
Chappell Islands Granite|3912|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Gardens Suite|31503|Middle Devonian||||intrusion|Devonian||||||||No|42726||||||Formal name not intended. Called Chappell Island in 98/29072, but shown on Mount Chappell Island.  Formerly of Wybalenna Suite.||acid intrusive rock|||Y||17-JAN-23
Chocolate Sandstone|4034|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|40136||||||||siliciclastic sedimentary rock|||N||17-JAN-23
Chudleigh Subgroup|4059|Chudleigh Limestone|4058|||Yes|Subgroup|Formal|Variation of published name|Described|Gordon Group|7586|||Bolindian|||||Yapeenian||||||||No|41954||||||Not to be confused with the Chudleigh basaltic nomenclature of Qld.|Limestone including stromatoporoids.|carbonate sedimentary rock|||N||17-JAN-23
Churchill Sandstone Member|23488|||||Yes|Member, phase|Formal|Other new published name|Defined|Florentine Valley Formation|27081|||Lower Ordovician||||deposition|Lower Ordovician|||||||TAS|No|36379|36379|B.A.Stait, J.R.Laurie|19-NOV-79|||See also Churchill Sandstone.|Planar-bedded to cross-bedded, bioturbated and burrowed grey sandstone and gritty sandstone, and thin basal conglomerate locally; gastropods and obolid brachiopods.|siliciclastic sedimentary rock|||N||17-JAN-23
City of Melbourne Volcanics|74595|City of Melbourne Formation|37346|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Skipworth Subgroup|37342|||Ediacaran||||eruption|Ediacaran||||||90|TAS|Yes|60650||Direen, N. (GSTAS)|24-JUN-08|Forsyth, S.|02-DEC-08|Within the Grassy Group.|A three-part succession of mafic volcanic rocks, volcanic breccia and tholeiitic pillow lavas with peperites at the base.|basic volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Clark Group|4102|||||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Cryogenian|||||Tonian||||maximum depositional age||2000||No|41793||||||Clark Sandstone, WA has priority. Name is still current in Jubilee Region, TAS unless replaced however. Correlated with Pandani Group, Rocky Cape Group. Located north of PEDDER on the HUNTLEY map sheet. Age poorly constrained from detrital zircon age in Needles Quartzite.|Quartzarenite, siltstone, shale and carbonate; laminated marine mudstone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Clarke Island Granite|26480|Clarke Island granite|4106|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Upper Devonian||||intrusion|Upper Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite-(garnet/cordierite) monzogranite|acid intrusive rock|||Y|S-type|17-JAN-23
Claytons Rivulet Ultramafic Complex|79483|||||Yes|Group, Suite|Formal|Other new published name|Described|||||||||deposition|||||||||No|69874||||||Described in Cambrian chapter, so probably Cambrian age.|Strongly sheared, locally massive serpentinised ultramafics of unknown composition, interlayered with 2-20m slivers of quartzite, schist, amphibolite. Banded greenschists on west margin.|metamorphosed ultramafic rock|||U||17-JAN-23
Cleveland porphyry|67911|||||Yes|Formation, beds|Informal|Resvd name published|Briefly described|||||Devonian||||eruption|Devonian||||||||No|63540||McClenaghan, M|07-FEB-05|||Altered subsurface body in the Cleveland Mine, probably related to the nearby Meredith Granite (11660).|I-type granite, felsic; strongly fractionated, reduced.|acid intrusive rock|||N|I-type|17-JAN-23
Clifton Formation|4157|Clifton Beds|4155|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Heytesbury Group|8311|||Miocene||||deposition|Oligocene|||inferred, biostratigraphic correlation|||90|VIC|No|48581|31036|||||Of Teichert (1947). See also Lexicon. SJ54-11,12. Superseded Kawarren limestone in 1974. Different unit to Clifton Springs Tuff. Ages from strontium isotope stratigraphy on forams [2009 reference].|Shallow marine deposits: medium to coarse grained calcarenite of bryozoan and shell fragments in quartz sand matrix, moderately sorted, thin to medium bedded (60581).|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Climie Formation|4170|||||Yes|Formation, beds|Formal|Other new published name|Described|Dundas Group|26529|||Iverian||||deposition|Iverian||||||450||No|31464|||||||Laminated purple and green siltstone with thinly interbedded lithic wacke and a few conglomerate units; brachiopod and trilobite fauna.|siliciclastic sedimentary rock|||N||17-JAN-23
Clog Tom Sandstone|26482|||||Yes|Formation, beds|Formal|Other new published name|Described|Upper Parmeener Supergroup|18944|||Late Permian||||deposition|Late Permian||||||600||No|63868|||||||Thin to medium-bedded, fine- to medium-grained micaceous quartz sandstone with shaly partings of micaceous and carbonaceous siltstone, some planar cross-bedding, mud pellets and fossil plants.|siliciclastic sedimentary rock|||N||17-JAN-23
Cluan Formation|4189|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Upper Parmeener Supergroup|18944|||Anisian||||deposition|Scythian||||||140||No|24549|||||||40-50m of well-sorted, glistening quartz sandstone in fining-upward cycles, often with basal mud-pellet conglomerate or quartz granules; then discontinuous granule sandstone overlain by a 20m succession of quartz and lithic sandstone with mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Clytie Cove Group|23491|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Middle Cambrian|||||Proterozoic||||||1850|TAS|No|37412|37412|P.R.Williams|15-SEP-77|||Adamsfield-Jubilee region.|Thick, deformed succession of relatively unmetamorphosed conglomerate, sandstone and shale; composed of quartzite, phyllite and schist clasts.|siliciclastic sedimentary rock|||N||17-JAN-23
Coastal Range Quartz Monzonite|4218|||||Yes|Formation, beds|Formal|Other new published name|Described|||||||||intrusion|||||||||No|31173||||||Of Walker (1957). See Tas Lexicon volume.||intermediate intrusive rock|||Y||17-JAN-23
Coles Bay Granite|26485|Coles Bay Adamellite|33473|||Yes|Formation, beds|Formal|Other new published name|Described|||Freycinet Suite|40888|Mississippian|350||isotopic, K/Ar|intrusion|Upper Devonian|388|7|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|73369||||||Included in Boobyalla Suite of Chappell, 1991. Both pre-dates and replaces Coles Bay Adamellite.|Strongly fractionated, reduced, felsic, I-type biotite alkali-feldspar granite|acid intrusive rock|||Y|I-type|17-JAN-23
Coles Bay Suite|68839|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described||||||||||||||||||No|24514||||||Probably includes Coles Bay Adamellite? May be replaced by Freycinet Suite?|I-type granites.|acid intrusive rock|||Y|I-type|17-JAN-23
Collingwood River metapelites|78073|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|Franklin Metamorphic Complex|34211|||Wuliuan|||||Cambrian Stage 3|512|4|chemical U-Th-Pb|||||No|68253||||||Cambrian age. ca. 512 +/- 4 Ma|||||N||17-JAN-23
Collingwood River whiteschist|78074|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|Franklin Metamorphic Complex|34211|||Cambrian|||||Cambrian|504|5|chemical U-Th-Pb|||||No|68253||||||U-Th-Pb monazite age data from Chmielowski (2009).ca. 504 +/- 5 Ma||metamorphic rock|||N||17-JAN-23
Comet Slate|4392|||||Yes|Formation, beds|Formal|Other new published name|Described|Dundas Group|26529|||Late Cambrian|||||Late Cambrian||||||250||No|31572||||||Supersedes Comet Formation.|Consists manily of thinly interbedded grey siltstone and mudstone with minor green sandstone; rare indeterminate brachiopods.|siliciclastic sedimentary rock|||N||17-JAN-23
Comstock Formation|4408|Comstock Tuff|4409|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Tyndall Group|18756|||Late Cambrian|494.4|3.8|isotopic, U/Pb-Pb/Pb ion probe|eruption|Late Cambrian|496|.9|isotopic, U/Pb-Pb/Pb, TIMS|maximum depositional age||800|TAS|Yes|30276||White M.J.||Calver, C.|21-JUL-95|The Comstock Formation is the lowermost of two formations which make up the Tyndall Group, Mount Read Volcanics.|Predominantly comprises resedimented crystal-rich volcaniclastic sandstone and breccia, and a suite of rhyolite lava dome complexes and associated pyroclastics. Includes limestone with trilobite fauna.|acid volcanic rock|carbonate sedimentary rock||N||17-JAN-23
Concert Schist|4413|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Precambrian|684||||Neoproterozoic|684|||||||No|30281|||||||Mainly mica phyllite and subordinate micaceous quartzite, metamorphosed to phyllite grade.|metamorphic rock|||N||17-JAN-23
Conical Rocks Granite|75565|Pieman Granite|15177|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Conical Rocks Suite|79588|Upper Devonian||||intrusion|Upper Devonian|365|4|isotopic, U/Pb|||||No|66575||Everard, J.L. (MRT) after Sawka et al (1990)|18-DEC-09|||Granite south of the Pieman River. Probably part of Pieman Suite? See also Pieman Head (Conical Rocks) Granite.|Felsic, S-type granite; moderately to strongly fractionated, reduced.|acid intrusive rock|||Y|S-type|17-JAN-23
Conical Rocks Suite|79588|||||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||||Carboniferous|||||Devonian||||||||No|69876|||||||S-type peraluminous granites; moderately to strongly crystal-fractionated.|acid intrusive rock|||Y||17-JAN-23
Cooee Dolerite|4477|Cooee dolerite|4483|||Yes|Formation, beds|Formal|Other new published name|Described|alkali basalt, dolerite #84028|84028|||Cryogenian|711|35|isotopic, K/Ar|intrusion|Cryogenian|725|35|isotopic, K/Ar|||||No|45003||||||Intrudes Burnie Formation.  Age: 711+/-16Ma.|Altered alkali (sodic) basalt or dolerite. Minor alkaline dolerite intrusions.|metamorphosed basic igneous rock|||Y||13-SEP-23
Corinna Dolomite|40070|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Ahrberg Group|160|||Ediacaran||||deposition|Ediacaran||||||||No|23460|||||||Poorly exposed, massive, fine-grained dolostone, dark grey slate and minor chert. Partial silicification of the dolostone has produced significant residual deposits of silica flour.|carbonate sedimentary rock|||N||17-JAN-23
Corn Hill Formation|37828|Corn Hill beds|33785|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Mathinna Supergroup|36812|||Pragian||||deposition|Pragian||||||600|TAS|Yes|24216||||||Reserved as Corn Hill beds (Hills, P., 29OCT1999). See UNIT DEFINITION. Correlates host vein-style mesothermal gold mineralisation in NE Tasmania and Victoria. See Corn Hill beds and Corn Hill Beds.|Graded quartzwacke sandstone and sandstone-siltstone-shale turbidite facies.|siliciclastic sedimentary rock|||N||17-JAN-23
Corner Granite|23511|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Poimena Suite|31626|Devonian|354|3||intrusion|Devonian|354|3||||||No|36374||D.J.Cocker|24-OCT-74|||Card. In press according to DL1980. One of the Furneaux Islands granites on Cape Barren Island.|I-type,felsic granite; weakly fractionated, reduced.|acid intrusive rock|||Y|I-type|17-JAN-23
Corra Lynn Agglomerate|30096|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned||||||||||||||||||No|43088|||||||||||N||17-JAN-23
Cotcase Creek Formation|24229|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Weld River Group|24566|||Ediacaran||||deposition|Ediacaran|||||||TAS|Yes|41908||Calver C.R.|05-JUL-85|||Adamsfield-Jubilee region.|Consists predominantly of massive dolomite, with lesser mixtite, minor mudstone, rare sandstone and rare chert.|sedimentary rock|||N||17-JAN-23
Cottons Breccia|4781|||||Yes|Formation, beds|Formal|Other new published name|Defined|Grassy Group|7717|||Ediacaran|575|3|inferred, intrusive relationship||Cryogenian|579|16|inferred, overlying unit||39|200|TAS|No|31468|31468|||||Age: c.580Ma. A King Island unit. See also Cottons Creek Breccia and Cotton Tree Breccia. Detrital zircons from this unit dated at 655-635 Ma.|Consists of diamictite and minor volcaniclastic sandstone. A glacial influence is indicated.|siliciclastic sedimentary rock|||N||17-JAN-23
Counsel Creek Formation|23515|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Artinskian||||deposition|Sakmarian||||||70|TAS|No|69854|39579|Geological Survey of Tasmania|03-AUG-79|||Age: Bernacchian to basal Lymingtonian Stages (~Late Sakmarian to Artinskian)|Coarse-grained, richly fossiliferous, bioclastic crinoidal limestone and minor shale, grading upward into finer-grained and more impure limestone and calcareous siltstone. Secondary chert replaces limestone as tabular and ellipsoidal bodies at many levels|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Cowrie Siltstone|24886|||||Yes|Formation, beds|Formal|Other new published name|Described|Rocky Cape Group|27555|||Ectasian|584|8|inferred, intrusive relationship|deposition|Ectasian|1262|12|inferred, underlying unit|deposition||2450|TAS|No|30877||||||Of Spry, 1957; Gee, 1968, and later. Includes "White Quartzite Stage". Age poorly constrained by age of dolerite dykes intrusions (K/Ar 600+/-8Ma), and biostratigraphy and isotope chemostratigraphy of overlying Black River Dolomite (~750-650 Ma). Most recent (2014) dating of authigenic monazite, in this units and the underlying Looneys Flat Siltstone appears to better constrain deposition to the Ectasian.|Black pyritic shale with interbedded siltstone; laminated.|fine grained siliciclastic rock|||N||17-JAN-23
Cox Bight Granite|33461|||||Yes|Formation, beds|Formal|Variation of published name|Described|||||Upper Devonian|367||isotopic, U/Pb-Pb/Pb ion probe|intrusion|Middle Devonian|369.9|2.5|isotopic, U/Pb-Pb/Pb ion probe|||||No|44105||||||Southern Tyennan Element. Age and suite (ie, ungrouped) derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Has a very large inferred subsurface extent; unusual for W Tasmanian granites.|S-type biotite monzogranite. This is a small area of contact granite. Medium to fine-grained, leucocratic,  with rare muscovite. Consist of quartz, K-feldspar, biotite and rare albite-oligoclase and muscovite.|acid intrusive rock|||Y|S-type|17-JAN-23
Cradle Cirque Siltstone|4834|Cradle Cirque Formation|4833|||Yes|Formation, beds|Formal|Variation of published name|Described|Lower Parmeener Supergroup|10795|||Cisuralian||||deposition|Cisuralian||||||||No|36817||||||See also Cradle Cirque Formation.||siliciclastic sedimentary rock|||N||17-JAN-23
Craggy Island Granite|26502|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Musselroe Suite|40881|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Formal name not intended. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Creek Creek Formation|4876|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|41795||||||See also Creek Formation.|||||N||17-JAN-23
Creekton Formation|4877|||||Yes|Formation, beds|Formal|Other new published name|Described|Liffey Group|27464|||Late Permian||||deposition|Permian||||||||No|24549||||||Wrongly entered as McKellars Creekton Formation until Nov 1991.|Mottled mica sandstone unit.|siliciclastic sedimentary rock|||N||17-JAN-23
Crescent Spur Sandstone|4882|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Luina Group|75980|||Cambrian Series 2||||deposition|Terreneuvian|||||||TAS|Yes|37052||||Forsyth, S.|27-MAY-11|Of Luina Group. Luina Group constituent units: Deep Creek Volcanics (bottom), Halls Formation and Crescent Spur Sandstone (top) (Collins 1983). IN: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). 2011. The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. p111-113.|Grey, fine- to medium-grained turbiditic micaceous greywacke and interbedded siltstone and mudstone, with thick units of red-brown arglllite and minor grey banded chert, spilitic basalt and associated mafic tuff and volcaniclastic greywacke|fine grained siliciclastic rock|||N||17-JAN-23
Cretaceous intrusive complexes 76564|76564|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Cretaceous|92|||intrusion|Lower Cretaceous|100|||||||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
Crimson Creek Formation|4898|Crimson Creek Argillite|4894|||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Ediacaran|570|||deposition|Cryogenian|650|||||5000||No|43332||||||See also Crimson Creek formation. Elliott Bay-Queenstown-Rosebery region.|Argillites, siltstones, volcaniclastics, basic volcanics, greywacke. Un-named sub-units consist of massive graded, feldspar-lithic greywacke, with phlogopite-biotite alteration; laminated-black shale, pyrrhotitic.|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Croles Hill Diamictite|74641|Croles Hill Mixtite|21579|||Yes|Formation, beds|Formal|Variation of published name|Defined|Kanunnah Subgroup|34163|||Ediacaran|||||Ediacaran|582.1|4.1|isotopic, U/Pb-Pb/Pb ion probe|||250|TAS|No|62516|67502|||||Originally published as Croles Hill Mixtite by J.L. Everard (1992).  Part of the Togari Group. Age: ~582+/-4Ma (based on age of dated but unnamed rhyolite below.). See also misspelling Crole Hills.|Diamictite: contains pebble- to boulder-sized clasts of basalt, sed.rocks + felsic volcanic rocks; contains intercalations of laminated siltstone and mudstone with dropstones.|siliciclastic sedimentary rock|||N||19-OCT-23
Croppies Member|4938|||||Yes|Member, phase|Formal|Other new published name|Described|Waterhouse Formation|19582|||Quaternary||||deposition|Quaternary||||||||No|35466|||||||||||N||17-JAN-23
Crotty Formation|4942|Crotty Quartzite|4943|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Eldon Group|27768|||Silurian|430|||deposition|Silurian|440|||||||No|30277||||||Replaced Crotty Quartzite, but overlap in name use occurs until at least 2011. See Crotty Quartzite.|Shallow-marine quartz sandstone and pebble conglomerate.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Crown Hill Andesite|4953|Crown Hill andesite|4955|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Cambrian||||eruption|Cambrian||||||||No|39892||||||||intermediate volcanic rock|||N||17-JAN-23
Cumberland Creek Dolostone|74645|Cap dolostone""|75997|||Yes|Formation, beds|Formal|Other new published name|Defined|Grassy Group|7717|||Ediacaran|575|3|inferred, intrusive relationship||Ediacaran|||||6|20|TAS|Yes|62516||Direen, N., Calver, C||Forsyth, S.|27-NOV-08|Of Mefre et al (2004). Stratigraphically linked to Yarra Creek Shale by presence of microbial mat facies in both units.|Forms cap carbonate over Cottons Breccia. Pale pinkish-grey, laminated dolostone passing up into interbedded dolostone, limestone and shale.|carbonate sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Cuni Gabbro|79485|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Early Cambrian||||intrusion|Early Cambrian||||||||No|69874|||||||Gabbro; pods up to 12m wide, greenschist facies metamorphism and hydrothermal alteration.|basic intrusive rock|metamorphosed basic igneous rock||Y||17-JAN-23
Currawong Quartzite|5080|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tiger Range Group|18145|||Pridoli|||||Ludlow||||||150|TAS|No|35671|35671|||||See also the misspelt Currawong Formation.|Siliceous orthoquartzite. Shallow-marine quartz sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Currie Group|37271|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Neoproterozoic|||||Neoproterozoic||||||||No|23309||||||Probably same unit as Currie Creek Ignimbrite and Currie Granite - unclear which is current formal name? Names may vary between Tasmania (King Island) and Victoria.|||||N||17-JAN-23
Curtin-Davis Volcanics|30399|Curtin Davis Volcanics""|5091|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Dundas Group|26529|||Middle Cambrian||||eruption|Middle Cambrian||||||||No|638|||||||Very altered vesicular lavas, breccias, volcaniclastics; andesitic.|metamorphosed igneous rock|||N||17-JAN-23
Curtis Island Granite|5092|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Not related to Curtis Island Group well used for a group in Rockhampton area, Qld. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|Granite|acid intrusive rock|||Y||17-JAN-23
Cygnet Coal Measures|5105|||||Yes|Group, Suite|Formal|Other new published name|Defined|Upper Parmeener Supergroup|18944|||Lower Triassic||||deposition|Lopingian||||||108||No|43876|63868|||||See also Lexicon. Replaced in part by Abels Bay Formation, TAS.|Well-sorted, cross-bedded sandstone feldspathic in the south but tending to quartz-rich and micaceous in the north, and carbonaceous siltstone and mudstone. With coal containing Glossopteris flora.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
D'Entrecasteaux Formation|35497|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian||||||||No|23222||||||See also Banks, Hale & Yaxley (1955), Pap & Proc Roy Soc Tas 89 p219-229. Occurs on Satellite Island, W of Alonnah, Bruny Island. Also known as D'Entrecasteaux Tillite.|||||N||17-JAN-23
Dabool Sandstone|5123|Dabool Formation|5122|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Poatina Group|15348|||Permian||||deposition|Permian||||||7||No|34012||||||See also Dabool Formation, of the Woodbridge Group.|Highly fossiliferous sandstone with erratics|siliciclastic sedimentary rock|||N||17-JAN-23
Dalcoath Formation|5132|Dalcoath Quartzite|5136|||Yes|Formation, beds|Formal|Variation of published name|Described|Success Creek Group|17488|||Cambrian||||deposition|Neoproterozoic||||||800||No|41795||||||See also Dalcoath Member. Correct place name is Dolcoath; however, this spelling appears to be part of the geological literature for Tasmania for a quartz sandstone; do not confuse with Dolcoath Granite and its variable nomenclature in Renison mine area|Well-sorted, cross-bedded and ripple-marked quartz sandstone with minor lithic sandstone, conglomerate and siltstone. Local intervals of volcaniclastic sandstone and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Dallys Siltstone|35648|Dally's Siltstone|35654|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Late Cambrian||||deposition|Late Cambrian||||||||No|61395||||||Misspelt during data entry - see Dally's Siltstone. But probably revised now to Dallys Siltstone or Dally Siltstone?||siliciclastic sedimentary rock|||N||17-JAN-23
Dalmayne Conglomerate|5153|Dalmayne conglomerate|5154|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Upper Parmeener Supergroup|18944|||Lower Triassic||||deposition|Late Permian||||||3||No|41855|||||||||||N||17-JAN-23
Dante Formation|5185|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|40966|||||||||||N||17-JAN-23
Darling Range Granite|5225|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Darlington Limestone|26514|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Golden Valley Group|27784|||Sakmarian||||deposition|Permian||||||||No|24548||||||See also Lexicon. SK55-11,6. Facies of Golden Valley Group and Massey Creek Group|Fossiliferous and dropstone-rich calcirudites, bryozoal siltstones and limestones; Eurydesma and spiriferid calcirudite.|carbonate sedimentary rock|||N||17-JAN-23
Darwin Granite|5256|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Furongian||||intrusion|Drumian||||||||No|73369||||||Different unit from Darwin Formation (NT).|I-type biotite alkali-feldspar granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Dasher andesites|79486|Dasher River Andesite|73333|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||||||eruption|||||||||No|69874||||||Informal variation on the Dasher River Andesite/s (unit no. 73333 and 73334). Unclear if this informal name is intended to replace the formal Dasher River Andesite or not.|Includes andesitic volcaniclastic sandstone and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Davey Group|5271|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Proterozoic|||||Proterozoic||||||||No|24548|||||||||||N||17-JAN-23
David Formation|23538|David formation|24907|||Yes|Formation, beds|Formal|Resvd name published|Fully described|||||||||deposition|||||||||No|41993||Fitzsimons S.J.|17-MAR-89|||||siliciclastic sedimentary rock|||N||17-JAN-23
Deadmans Bay Formation|83500|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Ironbound Group|40963|||Furongian|||||Furongian||||||||No|73489|||||||Sandstone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Deal Island Granite|5298|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Deal Island Suite|31570|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Deal Island Suite|31570|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Middle Devonian|||||Middle Devonian||||||||No|42726|||||||||||Y||17-JAN-23
Deep Bay Formation|27267|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Kungurian||||deposition|Artinskian||||||180|TAS|No|39234|41895|N.Farmer|04-JUL-77|||Age: early to middle Lymingtonian (Artinskian to possibly Kungurian - late Early Permian). Part  of Upper Marine Sequence.|Interbedded sequence of highly fossiliferous mudstone, siltstone and sandstone, with many dropstones.|siliciclastic sedimentary rock|||N||17-JAN-23
Deep Creek Volcanics|5328|Deep Creek Basic Volcanics|5320|||Yes|Formation, beds|Formal|Variation of published name|Defined|Luina Group|75980|||Mississippian||||eruption|Upper Devonian|||||||TAS|Yes|37052||Everard, J.L (MRT) after Collins, P.L.F. (1983 thesis)|24-MAY-11|Forsyth, S.|26-MAY-11|To be included in Luina Group. Luina Group constituent units: Deep Creek Volcanics (bottom), Halls Formation and Crescent Spur Sandstone (top) (Collins 1983). IN: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). 2011. The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. p111-113.|Massive, locally pillowed, spilitic, tholeiitic basalt, with interbedded tuff, volcaniclastic wacke, mudstone and chert.|basic volcanic rock|||N||17-JAN-23
Deep Glen Bay Granite|28159|Deep Glen Bay granite|5333|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian|373|3||intrusion|Middle Devonian|374|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726||||||Formal name not intended in 1991. Formalised in 2005. Variation on Deep Glen Bay Adamellite. One of the informally grouped South Eastern Tasmania Granites. Previously in Babel Island Suite.|Texturally variable rock - moderately fractionated, weakly peraluminous, alkali-feldspar granite; S-type granite, felsic;  reduced.|acid intrusive rock|||Y|S-type|17-JAN-23
Demons Bluff Group|36796|Demons Bluff Formation|5362|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Oligocene||||deposition|Eocene||||||||No|23778||||||Defined as Demons Bluff Formation in 1955 (Raggatt and Crespin). Renamed Demons Bluff Group by Trupp et al.in 1994 (APPEA J). Also a Tasmanian unit - in Bass Strait.|Carbonaceous pyritic silt to fine sand, clay, and clayey sand; contains occasional shelly fossils and glauconite.|fine grained siliciclastic rock|regolith||N||17-JAN-23
Demons Bluff Sequence|41026|||||Yes|Formation, beds|Sequence stratigraphy|Sequence strat published|Described|||||I1|28||biozone||lower Nothofagidites asperus|44||biozone|||||No|14235||||||Age: middle Eocene - Oligocene ( more specifically Lutetian- Rupelian).||siliciclastic sedimentary rock|||N||17-JAN-23
Den Formation|5367|Den Member|21639|||Yes|Formation, beds|Formal|Resvd name published|Defined|Chudleigh Subgroup|4059|||Bolindian||||deposition|Eastonian|||||||TAS|No|41954|41954|||||Reserved as Den Member by M.R.Banks, C.F.Burrett (1977).|Limestone; 55m of micrite and coralline calcirudite, passing up into 38m of sparsely fossiliferous micrite with thin black shale beds, then 40m of pale unfossiliferous fenestral micrite. Fossils listed.|carbonate sedimentary rock|||N||17-JAN-23
Denbys Dolerite|77097|||||Yes|Formation, beds|Reserved|Reserved|Fully described|||||Ediacaran||||intrusion|Ediacaran||||||||No|69841||Calver,C.(Mineral Resources Tasmania).|13-AUG-12|||A 250 m thick sill of dolerite and gabbro, Ediacaran in age, intruding the lowermost Grassy Group (upper Cryogenian-Ediacaran) just south of Fraser Bluff, King Island.To be published late 2012: 1:25 000 scale digital geological map series.Explanatory Report for the Grassy and Naracoopa geological mapsheet.|Basal black cumulate gabbro; grey, coarse-grained dolerite; massive, grey, very fine-grained microdiorite; local grey-white, aphanitic andesitic rock.|basic intrusive rock|||Y||17-JAN-23
Denison Group|5370|||||Yes|Group, Suite|Formal|Other new published name|Fully described|Wurawina Supergroup|24587|||Lower Ordovician|477|12|||Late Cambrian||||||||No|40639||||||Equivalent to Owen Group -- "There has been a trend on the 1:25 000 geology maps to use Owen Group for the rocks in the west and north west of Tasmania and to restrict Denison Group to the rocks that extend from the Denison Range area (roughly southern central Tasmania). This trend is not so evident in the broader literature" (per email S.Forsyth, 11/12/08). Silica-rich gravel has been quarried extensively in this unit.|Siliciclastic rocks: calcareous mudstone, siltstone, conglomerate, quartz sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Denison Group and correlates|37475|||||Yes|Group, Suite|Informal|Variation of published name|Mentioned|Wurawina Supergroup|24587|||Lower Ordovician||||deposition|Late Cambrian||||||||No|||||||Lithology recorded is that to be used for Tasmania 1:1million geological map, National Maps Project. Includes Huntley, Reeds, Mount Zeehan and Misery Conglomerates, Newton Creek Sandstone, Sedgwick Conglomerate, Singing Creek Formation.|Marine to non-marine quartzose conglomerate-sandstone-siltstone sequences|siliciclastic sedimentary rock|||N||17-JAN-23
Despatch Limestone|5419|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|40136||||||||carbonate sedimentary rock|||N||17-JAN-23
Detention Subgroup|28502|Detention Sub-group|5424|||Yes|Subgroup|Formal|Variation of published name|Fully described|Rocky Cape Group|27555|||Mesoproterozoic|||inferred|deposition|Mesoproterozoic|1433|14|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1400||No|42358||||||Of Gee (1968). Smithton-Rocky Cape region. U-Pb detrital zircon analysis yielded maximum depositional ages 1433+\-19 (Black et al., 2004) and 1447+\-24 Ma in the east and west respectively. An authigenic monazite age of 1084.5+/- 8.7 Ma helps to constrain the minimum age [but the stratigraphic position of the sample is not discussed] (Halpin et al., 2014)|Dominantly submature cross-bedded quartz sandstone with interbedded siltstone.|siliciclastic sedimentary rock|||N||27-APR-23
Devils Eye Dolomite|24243|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Weld River Group|24566|||Late Precambrian||||deposition|Late Precambrian||||||2000|TAS|Yes|41908|41908|Calver C.R.|10-NOV-88||||Pale grey dolomite, typically of interbedded grainstone and fine-grained types.|carbonate sedimentary rock|||N||17-JAN-23
Devonian granites 76551|76551|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Upper Devonian|356|||intrusion|Lower Devonian|400|||||||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
Devonian to Carboniferous granites 76545|76545|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mississippian|344|||intrusion|Middle Devonian|408|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset. [Note: Max Age name does not match numerical age (Early Devonian) in either AGSO1996 or GTS 2004 timescales. 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
Dial Conglomerate|5446|||||Yes|Formation, beds|Formal|Variation of published name|Described|Owen Group|34165|||Lower Ordovician||||deposition|Late Cambrian||||||||No|36788||||||Name probably refers to same unit as Dial Range Conglomerate. First formalised/published on the Sheffield map (1959) in the Devonport Quadrangle, which covers the Dial Range. The explanatory report for the Sheffield map did not appear until 1979 by which time Burns (1965) had defined the Dial Group in the Dial Range area - including Gnomon Mudstone and Duncan Conglomerate, together with Moina Sandstone to the south. These had appeared earlier, with Dial Subgroup, on the Devonport map (1963) but have probably been re-assigned elsewhere since?  The nomenclatural history of the Dial units is extremely convoluted and confusing due to revisions, redefinitions, re-interpretations and time lapsing between mapping and reporting, etc.||medium-coarse grained siliciclastic rock|||N||17-JAN-23
Diddleum Granodiorite|33463|||||Yes|Formation, beds|Formal|Variation of published name|Described|||Diddleum Suite|33464|Middle Devonian||||intrusion|Middle Devonian|390|2|isotopic, U/Pb-Pb/Pb ion probe|||||No|44105||||||Briefly described in GSA Special Publication 15 p257 (1989). Bassian Batholith of Chappell et al 1991. See also Diddleum Granite, Scottsdale Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |I-type biotite-hornblende granodiorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Diddleum Suite|33464|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Upper Devonian|372||||Middle Devonian|393|||||||No|64393||||||Included in the Bridport Suite of Chappell et al 1991?||acid intrusive rock|||Y|I-type|17-JAN-23
Dilwyn Formation|5489|Dilwyn Clay|5486|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Wangerrip Group|19406|||Lutetian||||deposition|Ypresian||||||1000|VIC|No|71437|31036|||||Of Bock and Glenie (1965) after Dilwyn Clay of Baker (1953). Otway Basin, Gambier Basin. Onshore areas in Victoria have been reassigned (VandenBerg 2009) to the Wiridjil Gravel (majority of exposures) or Moomowroong Sand.|Composed mainly of dark brown, carbonaceous sandy clay and silt, interbedded with fine- to medium-grained, clean to clayey sand, with minor coarse sand and gravel.|fine grained siliciclastic rock|regolith||N||17-JAN-23
Dogs Head Formation|25881|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Chudleigh Subgroup|4059|||Eastonian||||deposition|Eastonian|||||||TAS|No|41954|41954|||||Originally reserved as Dogshead Member by Banks and Burrett (1977) but published as Dogs Head Formation in 1989.|Micrite and dolomitic micrite with chert nodule horizons in lower two-thirds of the Formation; variety of shell fossils, corals and stromatoporoids.|carbonate sedimentary rock|||N||17-JAN-23
Dolcoath Granite|5570|Dolcoath granite|5572|||Yes|Formation, beds|Formal|Other new published name|Described|||Housetop Suite|31588|Mississippian|341||isotopic, K/Ar|intrusion|Upper Devonian|361||isotopic, K/Ar|||||No|73369||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Not to be confused with the misspelt Dalcoath nomenclature for a quartz sandstone in same area, namely, Dalcoath Formation. Numerical age from 1967 paper.|I-type biotite alkali-feldspar granite -- Medium - to coarse-grained granite consisting of quartz, perthitic microcline, plagioclase and biotite; accessory minerals include zircon, apatite fluorite, topaz, cassiterite and disseminated sulphides.|acid intrusive rock|||Y|I-type|17-JAN-23
Dolphin Sands|5577|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|30321|||||||||||N||17-JAN-23
Donaldson Formation|40069|Donaldson Group|5589|||Yes|Formation, beds|Formal|Variation of published name|Defined|Ahrberg Group|160|||Early Cambrian||||deposition|Cryogenian||||||||No|23460||||||Probably supersedes Donaldson Group (GSA Special Publication 15, 1989, p20).|Proximal quartzose turbidites: poorly to well-sorted conglomerate and sandstone, passing up into micaceous quartzwacke with interbedded siltstone and mudstone then grey slaty pelitic siltstone with minor banded chert and silicified oolitic carbonate.|siliciclastic sedimentary rock|||N||17-JAN-23
Dora Conglomerate|5630|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tyndall Group|18756|||Late Cambrian||||deposition|Late Cambrian|||||||TAS|No|31462|43054|||||Of Bradley (1954). Defined by Baillie (1989). Correlated with Zig Zag Hill Formation.|||||N||17-JAN-23
Dove Granite|29241|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Late Cambrian|448|||intrusion|Late Cambrian|519|||||||No|73369||||||Age advised by M. McClenaghan, Mineral Resources Tasmania 25-MAR-2004. See also Dove River Granite, Mersey River Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite monzogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Dove Metamorphic Complex|73344|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described||||||||||||||||||No|63167|||||||Predominant rock type is pelitic schist (fine- to medium-grained);garnetiferous; transitional with phyllite near Cradle Mountain.|low-intermediate grade metamorphic rock|||N||17-JAN-23
Dove Schist|5683|Dove Group|5680|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Mersey River Metamorphic Complex|35838|||Early Cambrian|||||Early Cambrian||||||||No|30888||||||Replaced by Dove Group, Dove Metamorphic Complex, but original name of Spry (1958) now reinstated, as part of Mersey River Metamorphic Complex. See p974, 01/31065.|Predominantly grey to green, garnetiferous quartz-muscovite schist and chlorite-albite-muscovite schist; quartzite is uncommon. Transitions to phyllite westward (of Cradle Mountain Road). Includes a small concordant body of amphibole schist.|metasedimentary siliciclastic rock|||N||17-JAN-23
Dover River Granite|26525|Dover River granite|23557|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Musselroe Suite|40881|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||NOT a variation of Dove River Granite and Dove Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite-(garnet/cordierite) monzogranite; moderately fractionated, reduced.|acid intrusive rock|||Y|S-type|17-JAN-23
Dreadnought Hill Member|5700|||||Yes|Member, phase|Formal|Other new published name|Described|Crimson Creek Formation|4898|||Proterozoic||||deposition|Proterozoic||||||||No|33218|||||||Argillites, siltstones, mudstones, tuffs, tuffaceous clastic sediments, cherts.|siliciclastic sedimentary rock|||N||17-JAN-23
Dreamy Bay Tillitic Sandstone|40051|||||Yes|Formation, beds|Formal|Other new published name|Described|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Permian||||||||No|||||||See Banks, Hale & Yaxley (1955), Pap & Proc Roy Soc Tas 89 p219-229 -- reference occurs on p220 Fig. 1 and p226. Occurs on northern side of Woody Island (or Satellite Island). Age: Tamarian. Overlain by limestone equivalent to Darlington Limestone, Maria Island. Thickness is ~50ft.|Medium-grained, dark grey, thickly bedded and poorly sorted.|siliciclastic sedimentary rock|||N||17-JAN-23
Drys Formation|5728|||||Yes|Formation, beds|Formal|Other new published name|Described|Bogan Gap Group|2080|||Late Permian||||deposition|Late Permian||||||107||No|24549||||||See also Drys Mudstone - probably superseded by this name?|Micaceous mudstone mostly.|fine grained siliciclastic rock|||N||17-JAN-23
Duncan Conglomerate|5800|||||Yes|Formation, beds|Formal|Other new published name|Described|Denison Group|5370|||Lower Ordovician||||deposition|Late Cambrian||||||550||No|35288||||||Originally of Dial Group/Subgroup, Junee Group, correlated with, and now considered part of Denison Group, Wurawina Supergroup. See Devonport 1mile explanatory notes p67 etc and GSA Special Publication 15 (1989), p192.|Siliceous clasts up to boulder size in a siliceous sand-grade matrix;  clasts are of quartzite, vein quartz, hematite, limonite, chert and some lava and mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Dundas Group|26529|||||Yes|Group, Suite|Formal|Other new published name|Fully described|Mount Read Volcanics|13057|||Late Cambrian|||||Middle Cambrian||||||3800||No|24548||||||Thick conglomeratic flysch sequence of 2 parts: Lower and Upper Dundas Groups. Razorback Conglomerate no longer a current constituent.|Sedimentary and volcanic rocks. Fine-grained flysch sequence. Marine sandstone-siltstone-conglomerate sequences, typically turbiditic, quartz-rich to polymict; Furongian fossils in places.|siliciclastic sedimentary rock|||N||17-JAN-23
Durroon Megasequence|41022|||||Yes|Clan|Sequence stratigraphy|Sequence strat published|Described|||||Tricolporites lilliei|75||biozone||Phyllocladidites mawsonii|91|||||||No|14235||||||Turonian - Campanian age.|Basal basalt, overlain by shale, siltstone and sandstone.|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Durroon Mudstone|73127|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||Coniacian||||deposition|Turonian||||||300||No|44135||||||May have been replaced by Durroon Formation?|Lacustrine deposits; carbonaceous shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Eaglehawk Gully Formation|33787|||||Yes|Formation, beds|Formal|Resvd name published|Described|Denison Group|5370|||Lower Ordovician||||deposition|Lower Ordovician||||||||No|23850||Hills P.|29-OCT-99|||Beaconsfield area. A basalt flow one third of the way up from the base of the Eaglehawk Gully Formation in Middle Arms Gorge is informally referred to as Eaglehawk Gully basalt.|Calcareous sandstones and siltstones with discrete limestone beds generally towards the top. Ordovician fossils and trace fossils in places.|carbonate sedimentary rock|||N||17-JAN-23
Early Paleozoic sedimentary rocks 76681|76681|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Devonian|385|||deposition|Ordovician|490|||||||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
East River Coquina|5904|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Upper Pleistocene||||deposition|Upper Pleistocene||||||||No|33358|||||||||||N||17-JAN-23
Eastern Quartz-Phyric Sequence|73128|||||Yes|Group, Suite|Informal|Other new published name|Fully described|Mount Read Volcanics|13057|||Drumian||||eruption|Drumian||||||||No|64395||||||See also variations 'Eastern Quartz-phyric Sequence', Eastern Quartz-phyric Sequence and Eastern quartz-phyric volcanics. Replaced by Tyndall Group? There is some controversy about this (2007). Of the Mount Read Volcanics?|10km wide belt of quartz-phyric felsic volcanics; rhyolitic lavas, volcaniclastics, intrusives; quartz-feldspar and biotite porphyry, granite.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Eastern View Formation|5924|Eastern View formation|5927|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Wangerrip Group|19406|||Eocene|55|||deposition|Campanian|75|||||360||No|30929||||||Defined (as Eastern View Coal Measures) by Raggatt and Crespin (1955). Redefined as Eastern View Formation (Abele 1968) to include Boonah Sandstone. Raised to Group status (Trupp et al. 1994) with Boonah Sandstone reinstated. Reduced to Formation status including Boonah Sandstone/Formation (VandenBerg 2009).|Mudstone, sandstone, conglomerate, lignite: mudstone pale brown; sandstone fine-grained to granule size; consists of quartz, poorly to moderately sorted; conglomerate uncommon; lignite black to brownish black; commonly impure.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Eddystone Point Granite|69572|Eddystone Granite|5951|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|63540||MRT|09-AUG-05|||MRT Tasmanian Granites map, 2005. See also the former Eddystone Granite.|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Eldon Group|27768|Eldon Beds|6046|||Yes|Group, Suite|Formal|Variation of published name|Fully described|Wurawina Supergroup|24587|||Lower Devonian|||||Late Silurian|||||2700|5000||No|43521|||||||Predominantly clastic succession. Shallow-marine siltstone, shale, sandstone, limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Eldon Group and correlates|37474|||||Yes|Group, Suite|Informal|Variation of published name|Mentioned|Wurawina Supergroup|24587|||Devonian||||deposition|Silurian||||||||No|63592||||||Lithology recorded for this informal grouping  that is to be used for Tasmania 1:1million geological map, National Maps Project. Includes Austral Creek Siltstone, Keel Quartzite, Amber, Bell  and Crotty Formations and Florence Quartzite.|Shallow marine quartz sandstone, siltstone and shale|siliciclastic sedimentary rock|||N||17-JAN-23
Elliott Bay Granite|69573|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Paibian|498.8|3.3||intrusion|Guzhangian|498.8|3.3||||||No|63825||MRT|09-AUG-05|||See also the misspelt Elliot Bay nomenclature.|Composite I-type, felsic granite; weakly to strongly fractionated, oxidised; biotite monzogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Elliott Point Porphyry|6107|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Eastern Quartz-Phyric Sequence|73128|||Drumian||||eruption|Drumian||||||||No|41143|||||||Massive and foliated quartz-feldspar-biotite porphyry.|acid intrusive rock|||U||17-JAN-23
Emita Granite|6135|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Wybalenna Suite|31658|Middle Devonian||||intrusion|Devonian||||||||No|42726|||||||I-type, felsic granite; moderately fractionated, ?reduced.|acid intrusive rock|||Y|I-type|17-JAN-23
Emmetts Creek Shale|78543|||||Yes|Formation, beds|Formal|Other new published name|Described|Balfour Subgroup|40970|||Ectasian|||inferred, geological correlation|deposition|Ectasian|||inferred, geological correlation||||TAS|No|67502||||||Age poorly constrained by age of dolerite dykes intrusions into other Rocky Cape Group units, and slate ages (643+/-10Ma), and biostratigraphy and isotope chemostratigraphy of overlying Black River Dolomite (~750-650 Ma).|Thinly laminated blue-green or green to cream siltstone with chlorite porphyroblasts, black pyritic carbonaceous shale and rare quartzarenite|fine grained siliciclastic rock|||N||17-JAN-23
Enstone Park Limestone|6205|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|66172||||||Originally an unpublished name in a student's thesis (K.R. Walker, 1957); but also published in same year by Walker (1957)in the Pap.Proc. R. Soc. Tas. Noted by McNeil (1965) that Gray Limestone was an equivalent of Enstone Park Limestone.|Contains trilobites.|carbonate sedimentary rock|||N||17-JAN-23
Eugenana beds|29418|Eugenana Beds|6351|||Yes|Formation, beds|Informal|Variation of published name|Described|||||Upper Devonian|||||Middle Devonian||||||||No|42958||||||From Banks (1962), J Geol Soc Aust 9(2), p185: Cave deposits in Gordon Limestone at Eugenana. Sandstones, carbonaceous siltstones and cave breccias containing no macrofossils, but upper Middle Devonian spores (Balme, 1960).|Sandstone, carbonaceous siltstone and cave breccias. Undeformed sediments with a late Middle Devonian microflora. Terrestrial cavern-filling deposits.|siliciclastic sedimentary rock|||N||17-JAN-23
Eumeralla Formation|6363|||||Yes|Formation, beds|Formal|Other new published name|Defined|Otway Group|14685|||Albian||||deposition|Aptian|||||2743|3000||No|48911|50154|||||Defined SA & Vic Reynolds et al. (1966). Of Otway Group, Vic, 1994. Stated to be within the Otway Supergroup in RefID: 22674 and 44133, but of Otway Group in 2009 GSV report 129 and most other references. Use of name extended to Early Cretaceous arkoses of Gippsland by VandenBerg et al (2006), as they are part of the same fluvial depositional system, but Gippsland Basin name Wonthaggi Formation restored in Morand (2010). Previously of Crayfish Group.|Volcanilithic sandstone, siltstone, mudstone, mud-clast conglomerate, with feldspar and quartz grains, and coal: fine to medium grained, consolidated, well-bedded, cross-bedded; braided stream deposits.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Ewart Creek Volcanics|79488|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Cambrian||||eruption|Cambrian||||||||No|69874||||||Presumably the same rocks which are referred to as Ewart Creek basalts (p180). Erupted in early Tyndall Group time.|Basaltic to doleritic dykes; tholeiitic.|basic intrusive rock|||N||17-JAN-23
Exton Member|6448|||||Yes|Member, phase|Formal|Other new published name|Described|Ashley Basalt|715|||Neogene||||deposition|Cenozoic||||||||No|24548||||||Of Wells (1957) in describing the Deloraine basalts.|Porphyritic, coarse-grained basalt - dark, blue-grey with large olivine crystals as phenocrysts and smaller ones in the groundmass.|basic volcanic rock|||N||17-JAN-23
Farrell Slate|6545|Farrell slate|6548|||Yes|Formation, beds|Formal|Other new published name|Described|Tyndall Group|18756|||Late Cambrian|||||Middle Cambrian||||||||No|34502||||||See also Farrell Slates - a name widely used in the literature (but misspelt?).|Carbonaceous slate and volcaniclastic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Faulkner Group|24975|||||Yes|Group, Suite|Formal|Other new published name|Described|Lower Parmeener Supergroup|10795|||Sakmarian|||||Sakmarian||||||||No|43474||||||See also Faulkner Formation. Also referred to as the Lower Freshwater Sequence.|Consists of predominantly flaggy, micaceous siltstone with several thin intervals of very poorly sorted, conglomeratic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Fenton Seam|74342|||||Yes|Member, phase|Informal|Other new published name|Briefly described|Mount Nicholas Coal Measures|12974|||Upper Triassic|||||Upper Triassic||||||||No|63172|||||||||||N||17-JAN-23
Fentons Spur Peridotite|79489|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Heazlewood River Complex|8232|||Middle Cambrian|||||Early Cambrian||||||||No|69874|||||||Coarsely interlayered dunite, harzburgite and minor orthopyroxenite, minor spinel; pyroxene proportion increases upward until well-layered pyroxenites predominate.|ultramafic intrusive rock|||Y||17-JAN-23
Fern Hill Granite|73631|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Devonian||||intrusion|Devonian||||||||No|63540||||||Unclear if related to fern Hill Microgranite in Victoria.|S?-type, felsic.|acid intrusive rock|||Y||17-JAN-23
Fernfields Formation|6602|||||Yes|Formation, beds|Formal|Other new published name|Described|Dundas Group|26529|||Late Cambrian||||deposition|Late Cambrian||||||600||No|31464|||||||Fine pebble conglomerate grading to granule conglomerate and sandstone and siltstone interbeds containing sandstone laminae.|siliciclastic sedimentary rock|||N||17-JAN-23
Fernflow Formation|6606|||||Yes|Formation, beds|Formal|Other new published name|Described|Dundas Group|26529|||Late Cambrian||||deposition|Late Cambrian||||||200||No|31464|||||||Pebble to boulder conglomerate interbedded with purple siltstone; clasts are mainly pink and white quartzite boulders; unfossiliferous.||||N||17-JAN-23
Ferntree Group|6611|||||Yes|Group, Suite|Formal|Variation of published name|Described|Lower Parmeener Supergroup|10795|||Guadalupian|||||Kungurian||||||||No|24549||||||Renamed Bogan Gap Group in Central Plateau area, but Ferntree Group probably still applies in Hobart, Brighton, Sorrell areas. See also Ferntree Mudstone, in current use.|Mudstone, siltstone, sandstone. Ice-rafted debris common; marine fossils common in lower sequences.|siliciclastic sedimentary rock|||N||17-JAN-23
Ferntree Mudstone|27773|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Ferntree Group|6611|||Permian||||deposition|Permian||||||199||No|24548||||||Described 1971, 1972. NOTE: stratigraphy used in Wells 1957 Deloraine Valley ref  is out-dated. See Frankford, Hobart Explan. Reports, 1981, 1976 etc. Correlated with Abels Bay Formation, Kingborough area. "Ferntree Mudstone and Risdon Sandstone together became Ferntree Group with the duplication of the Ferntree prefix" (per email S. Forsyth, 11/12/08). This unit lacks a specified type section. See also Ferntree Mudstone"".|Glaciomarine sandstone, siltstone and mudstone with some loadstones; poorly fossiliferous and bioturbated.|siliciclastic sedimentary rock|||N||17-JAN-23
Finch Creek beds|6650|Finch Creek Beds|6649|||Yes|Formation, beds|Informal|Other new published name|Mentioned||||||||||||||||||No|30998|||||||||||N||17-JAN-23
Fincham Metamorphic Complex|73343|Fincham Formation|21786|||Yes|Group, Suite|Formal|Other new published name|Briefly described||||||||||||||||||No|63167||||||Reserved as Fincham Formation by Fitzsimmons (1989).|||||N||17-JAN-23
Fingal Coal Measures|6653|Fingal beds|74380|||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|34287||||||||organic rich sedimentary rock|||N||17-JAN-23
Fisher Quartzite|73760|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Mersey River Metamorphic Complex|35838|||Early Cambrian|||||Early Cambrian||||||||No|63433||||||Part of the Mersey River Metamorphic Complex.|Quartzite, with local cross-bedding and ripplemarks; lesser interlayered quartz-muscovite schist and phyllite, with graded bedding locally preserved; amphibolite schist, after albitised olivine dolerite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Flat-Top Formation|6732|||||Yes|Formation, beds|Formal|Other new published name|Described|Liffey Group|27464|||Permian||||deposition|Permian||||||||No|24549|||||||Quartz, mica sandstone with numerous dark-grey shale bands||||N||17-JAN-23
Flaxman Formation|6733|Flaxmans Beds|6736|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Sherbrook Group|16826|||Coniacian||||deposition|Turonian||||||620|VIC|No|71437|42361|||||Type section in Victoria. Age Cenomanian to Turonian in Port Campbell Embayment area, Vic.|Mudstone, siltstone, fine- to coarse-grained sandstone; ironstone, siderite, dolerite, thin coal present.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||16-OCT-23
Florence Quartzite|28191|Florence Sandstone|26557|||Yes|Formation, beds|Formal|Variation of published name|Described|Eldon Group|27768|||Lochkovian|||||Pridoli||||||||No|31648||||||See also Florence Sandstone, Florence Formation. Superseded by Florence Sandstone? Max. thickness: ~490m|Massive or planar-laminated fine-grained quartz sandstone with minor mudstone interbeds, thinner and less laterally persistent beds towards top.|siliciclastic sedimentary rock|||N||17-JAN-23
Florentine Valley Formation|27081|Florentine Valley Mudstone|6772|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Denison Group|5370|||Arenig||||deposition|Tremadocian|||||||TAS|No|30277|36379|||||Florentine Valley Formation is an Early Ordovician sequence (Geological Evolution of Tasmania, 2014, p216).|Grey and gritty sandstones; overlain by richly fossiliferous, bioturbated, locally glauconitic, yellow to grey and calcareous siltstones; overlain in turn by fossiliferous, calcareous, siliceous cherty siltstones and fine siliceous sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Flowerdale Sandstone|6781|||||Yes|Formation, beds|Formal|Other new published name|Described|Lower Parmeener Supergroup|10795|||Cisuralian||||deposition|Cisuralian||||||||No|30325||||||Not to be confused with Flowerdale Member  (Tas) or Flowerdale Sandstone Member (Victoria).||siliciclastic sedimentary rock|||N||17-JAN-23
Flowery Gully Formation|35649|Flowery Gully Limestone|6782|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Gordon Group|7586|||Ordovician||||deposition|Ordovician||||||||No|23114||||||Presumably intended to supersede Flowery Gully Limestone, but not used by others.  Incorporates the Flowery Gully Limestone and the Grubb Shale or Grubb beds.|Pure stylolitic deep water limestone.|carbonate sedimentary rock|||N||17-JAN-23
Fonthill Sandstone Member|23598|||||Yes|Member, phase|Formal|Resvd name published|Briefly described|Castle Carey Mudstone|28441|||Permian||||deposition|Permian||||||2||No|41696||C.R.Calver|04-NOV-87|||M 89/26617. Within the Lower Parmeener Supergroup.|Fine-grained pebby sandstone with phosphatic nodules. Marine fossils present in some areas.|siliciclastic sedimentary rock|||N||17-JAN-23
Forest Conglomerate|6807|Forest Conglomerate and Quartzite|6806|||Yes|Formation, beds|Formal|Variation of published name|Described|Togari Group|23016|||Cryogenian||||deposition|Cryogenian||||||125||No|41908||||||See also informal Forest Conglomerate and Quartzite (that appears to be used as often as the formal Forest Conglomerate in the literature).|Open framework chert breccia interbedded with stratified pebble conglomerate and medium-grained, locally hematitic quartzarenite.|siliciclastic sedimentary rock|||N||17-JAN-23
Forester Member|6820|||||Yes|Member, phase|Formal|Other new published name|Described|Waterhouse Formation|19582|||Quaternary||||deposition|Quaternary||||||||No|35466|||||||||||N||17-JAN-23
Forth Granite|81983|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||Cambrian|||||Cambrian||||||||No|71730||||||Appears to be a separate unit from the Forth Metamorphic Complex (also shown as Cambrian).|I-type granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Forth Metamorphic Complex|6836|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Cambrian|514|4.6|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Cambrian|523|||||||No|41562||||||This name includes the Ulverstone Metamorphic Complex as described by Turner (1989). Also referred to as Forth Metamorphics and Metamorphic Complex. SHRIMP dating of zircon rims in garnet amphibolite provides age of metamorphism: 514+/-4.6 Ma. Zircon cores gave ages between 1800 an 1400 Ma, but they are regarded as inherited.|Metamorphic rocks comprise garnetiferous schist and quartzite, interlayered with amphibolite of tholeiitic affinity; two blocks of serpentinite faulted against medium-grade schists.|metasedimentary siliciclastic rock|||N||17-JAN-23
Fossil Bluff Sandstone|6846|Turritella bed""|18728|||Yes|Formation, beds|Formal|Other new published name|Described|Table Cape Group|17623|||Early Miocene||||deposition|Early Miocene||||||||No|44238||||||See also Lexicon. SK55-2/Table Cape.|Fine siltstones and shales, and glauconitic calcareous sandstones.|siliciclastic sedimentary rock|||N||17-JAN-23
Frankford Formation|33766|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||deposition|||||||||No|||Hills P.|29-OCT-99|||Badger Head area.|||||N||17-JAN-23
Franklin Metamorphic Complex|34211|Franklin Group|6885|||Yes|Group, Suite|Formal|Other new published name|Described|||||Cambrian|502|8|isotopic, U/Pb-Pb/Pb ion probe|metamorphism|Cambrian|||inferred|||||No|63167||||||See also Franklin Metamorphics - the Complex represents a structural concept. Originally described as Franklin "Group" (Spry 1957) - now includes the former Joyce Metamorphic Complex due to similarity in structure and history. Includes Mesoproterozoic garnet cores in mylonitized gneiss. See also Franklin Metamorphic Group (probably misspelt). Unit previously considered to be Proterozoic.|Mostly pelitic schist, minor quartzite and lenses of amphibolite; includes garnetiferous rocks, and about equal portions of schistose quartzite and coarse-grained, commonly knotted schist; schists are polydeformed.|metasedimentary siliciclastic rock|||N||17-JAN-23
Franklin Sound Granite|28560|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Fraser Formation|74061|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Ediacaran|587||isotopic, Sm/Nd|deposition|Ectasian|760|12|inferred, intrusive relationship||390||TAS|Yes|64400||Direen, N. (FrOG Tech)|07-JAN-07|Forsyth, S.|24-JUN-08|For use  on KING ISLAND sheet; nearest town Naracoopa. To be pub: in Precambrian Research, late 2008 in Direen, N.G., Jago, J.B. (accepted with revisions Dec 'o7) "The Cottons Breccia (Ediacaran) and its tectonostratigraphic context with Grassy Group....". DEFINITION CARD rec'd 24 June 2008. PP. Tentatively correlated with Rocky Cape Group (NW Tasmanian mainland).|Fine-grained turbidites, dominated by thick-bedded or laminated, pale grey, quartzose fine-grained siltstone, locally garnetiferous; also fine-grained sandstone and grey-black mudstone. Thin microbialite beds top many turbidite beds.|metasedimentary siliciclastic rock|||N||17-JAN-23
Freestone Cove Sandstone|6896|Crassatella bed""|28482|||Yes|Formation, beds|Formal|Other new published name|Described|Table Cape Group|17623|||||||deposition|||||||||No|44238||||||See also Lexicon. SK55-2/Table Cape. Refs "Crassatella bed" ( Johnston 1888).||siliciclastic sedimentary rock|||N||17-JAN-23
Freycinet Granite|6910|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Freycinet Suite|40888|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). One of the South East Coast granites. Stated to be I-type and S-type granite by different authors?|I-type. Medium- to coarse-grained, pink alkali-feldspar granite with K-feldspar megacrysts, quartz, cryptoperthitic microcline, albite, iron-rich mica (siderophyllite-zinnwaldite); accessory apatite, zircon, fluorite, tourmaline.|acid intrusive rock|||Y|I-type|17-JAN-23
Freycinet Suite|40888|||||Yes|Group, Suite|Informal|Resvd name published|Described|||||Carboniferous|||||Devonian||||||||No|65646||McClenaghan M.P.|15-APR-04||||Medium-coarse grained, dark grey hornblende-biotite granites; fine-grained diorite enclaves, amphibole and biotite intermingled clusters, plagioclase, intergranular K-feldspar, quartz; accessory apatite, zircon, spene, allanite, ilmenite.|acid intrusive rock|||Y|I-type|17-JAN-23
Gabbro Hill Plagioclase Pyroxenite|79490|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Heazlewood River Complex|8232|||Middle Cambrian||||intrusion|Early Cambrian||||||||No|69874|||||||Upper plagioclase pyroxenite zone follows lower dunite, harzburgite and orthopyroxenite zone.|ultramafic intrusive rock|||Y||17-JAN-23
Garcia Sandstone|7001|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Poatina Group|15348|||Kungurian||||deposition|Artinskian||||||14||No|34047||||||Age: Lymingtonian. This belongs in the central Plateau area, once included in rocks misinterpreted as the Ferntree Group - now probably part of Bogan Gap Group?|Pebbly to conglomeratic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Garden City Formation|7002|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|40127|||||||||||N||17-JAN-23
Gardens Granodiorite|7005|Gardens granodiorite|7006|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Gardens Suite|31503|Middle Devonian|385||isotopic, Rb/Sr|intrusion|Lower Devonian|399.9|1.5|isotopic, U/Pb-Pb/Pb ion probe|||||No|37797||||||See also the informal Gardens Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and dataset.|I-type biotite-hornblende granodiorite - consists of euhedral to anhedral amphibole and biotite, plagioclase and intergranular K-feldspar and quartz.|acid intrusive rock|||Y|I-type|17-JAN-23
Gardens Suite|31503|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||Gardens Supersuite|31502|Middle Devonian|||||Lower Devonian|400.9|2|isotopic, U/Pb|||||No|42726||||||Includes Gardens Granodiorite.|Includes I-type granite (with hornblende).|acid intrusive rock|||Y|I-type|17-JAN-23
Gardens Supersuite|31502|||||Yes|Supergroup|Formal|Other new published name|Briefly described||||||||||||||||||No|42726||||||Includes Gardens Suite.|||||Y||17-JAN-23
Garfield Andesite|73316|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|Yolande River Sequence|73266|||Middle Cambrian||||eruption|Middle Cambrian||||||||No|63238||||||Presented as Garfield Andesite body. Part of Yolande River Sequence.|Feldspar-hornblende-phyric intrusive body, mineralised and altered in part.|intermediate volcanic rock|||N||17-JAN-23
Geilston Travertine|7095|||||Yes|Formation, beds|Formal|Other new published name|Briefly described||||||||||||||||||No|33433|||||||||||N||17-JAN-23
Geiss Formation|7096|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|41895|||||||||||N||17-JAN-23
Gelignite Creek Member|29222|||||Yes|Member, phase|Formal|Resvd name published|Defined|Huon River Formation|24313|||Late Precambrian||||deposition|Late Precambrian||||||200|TAS|Yes|42227|42227|Calver C.R.|05-JUL-85|||Within the Pandani Group. Discrepancy in parent unit? - Huon River Formation or Clear Water Formation?|White to pink, medium- to coarse-grained quartzarenite and lesser quartzitic pebble-conglomerate.||||N||17-JAN-23
Gell Quartzite|7101|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tiger Range Group|18145|||Llandovery|||||Llandovery||||||130|TAS|No|35671|35671||||||Siliceous orthoquartzite. Shallow-marine quartz sandstone and pebble conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Gellibrand Marl|7107|Gellibrand Clay|7103|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Heytesbury Group|8311|||Tortonian||||deposition|Rupelian|32|||||1300|VIC|No|71437|31036|||||Originally 'Gellibrand-beds' of Tate and Dennant (1893). Formerly Gellibrand Clays and Gellibrand Clay. Gellibrand Marl introduced by Bock & Glenie (1965). Incorporates Fishing Point Marl and "Upper Glen Aire Clay". Included in both Heytesbury Group and Torquay Group (VandenBerg 2009): see discussion in RefID 65715 p16. In Torquay Group replaces Fyansford Clay (of Bowler 1963, Chapman & Cudmore 1924, and others).|Marine shelf deposits: clay, marl and worm-burrowed calcarenite, fine to medium grained quartz and detrital calcareous fossil fragments in clay matrix, moderately sorted, massive to well bedded.|regolith|carbonate sedimentary rock||N||17-JAN-23
George River Granodiorite|7129|George River granodiorite|7130|||Yes|Formation, beds|Formal|Other new published name|Fully described|||Gardens Suite|31503|Middle Devonian|365||isotopic, K/Ar|intrusion|Lower Devonian|385||isotopic, K/Ar|||||No|35826||||||See also the informal George River Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |I-type biotite-hornblende granodiorite|acid intrusive rock|||Y|I-type|17-JAN-23
George River Suite|31504|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||Gardens Supersuite|31502|Middle Devonian|||||Middle Devonian||||||||No|42726|||||||||||Y||17-JAN-23
Giblin River siliceous sandstone|74375|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||||||deposition|||||||200||No|63170||||||Not intended as a formal name. Rests unconformably on Precambrian rocks.||siliciclastic sedimentary rock|||N||17-JAN-23
Gipps Creek Granite|40851|Ben Lomond Granite|1453|||Yes|Formation, beds|Formal|Resvd name published|Described|||Royal George Suite|40845|Carboniferous|347||isotopic, K/Ar|intrusion|Devonian|381.7|2.2|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|63540||Everard J.L., Findlay R.H., McClenaghan M.|15-APR-04|||South of Ben Lomond in NE Tasmania. Part of Ben Lomond Batholith (formerly Ben Lomond Granite). Used in unpublished manuscript of Everard J.L.&  Findlay R.H.|S-type biotite alkali-feldspar granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Glencoe Formation|7369|||||Yes|Formation, beds|Formal|Other new published name|Described|Golden Valley Group|27784|||Sakmarian||||deposition|Permian||||||27.15||No|24547||||||Invalid name.  Glencoe Limestone used in Vic.|Pyritic and carbonaceous mudstone with a few pebbles; Tasmanite oil shale. Fossils abundant.||||N||17-JAN-23
Gnomon Mudstone|73064|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Dial Group|5447|||||||deposition|||||||10||No|63170|||||||Thin unit of interbedded mudstone and sandstone with siliceous conglomerate bands.|siliciclastic sedimentary rock|||N||17-JAN-23
Goat Island Conglomerate|7467|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|Ulverstone Metamorphics|18803|||Mesoproterozoic||||deposition|Mesoproterozoic||||||||No|34068||||||Correlated with Burnie Formation, Ulverstone Metamorphic Complex, GSA Special Publication 15, 1989, p30-31. Shown as part of Ulverstone Metamorphics in 1963 Devonport 1inch to 1 mile map - described but not formally named as such.|Dominantly schistose conglomerate; mica schist, quartzose schist and some quartzite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Gog Range Greywacke|27421|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Mount Read Volcanics|13057|||Late Cambrian|||||Late Cambrian||||||||No|29626||||||Same unit as Gog Greywacke?|A very extensive and thick unit of predominantly micaceous greywacke and mudstone, with some interbedded volcaniclastic sandstone. Black-grey mudstone units present at or near the base in several areas. Local siliceous conglomerate units.|sedimentary rock|||N||17-JAN-23
Golden Valley Group|27784|Golden Valley Limestone and Shale|40007|||Yes|Group, Suite|Formal|Variation of published name|Redefined|Lower Parmeener Supergroup|10795|||Cisuralian|||||Cisuralian||||||83||No|24549|24547|||||See also Lexicon. ?Redefined by Clarke (1968). Unclear whether Quamby Mudstone is part of the group?|Richly fossiliferous siltstone and calcareous siltstone, with sandstone and mudstone; local conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Gomorrah Dolomite|24293|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Weld River Group|24566|||Ediacaran||||deposition|Cryogenian||||||800|TAS|Yes|41908|41908|Calver C.R.|10-NOV-88||||Massive to laminated, fine-grained dolostone; stromatolites resembling Conophyton locally present.|carbonate sedimentary rock|||N||24-JUN-23
Gordon Group|7586|Gordon Subgroup|7604|||Yes|Group, Suite|Formal|Other new published name|Fully described|Wurawina Supergroup|24587|||Lower Devonian||||deposition|Middle Ordovician|465||||900|3650||No|40727||||||See Geological Evolution of Tasmania (2014) volume, p244, which states: in Gordon Group type area the uppermost unit is Arndell Sandstone (previously Westfield Sandstone or Westfield beds; Corbett and Banks 1975, Baillie 1979, Banks and Baillie 1989). The top of Gordon Group is defined as the base of the prominent Gell Quartzite, lowest unit in Tiger Range Group (Corbett and Banks 1975, Baillie 1979, Banks and Burrett 1989). See also the informal Gordon Group Limestone.|Comprises predominantly micritic, warm-water shallow marine limestone, shale + sand deposited on a continental shelf, with lagoonal mud facies, abundant algal mats and pellet beds.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Gould Conglomerate|7639|Gould Formation|30018|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Upper Parmeener Supergroup|18944|||Lower Triassic||||deposition|Late Permian||||||||No|29638||||||Relations and age from GSA Special Publication 15, 1989, p312, 313, 316|Well-sorted, glistening quartz sandstone in fining-upward cycles, often with basal mud-pellet conglomerate or quartz granules; cycles are massive or tabular, cross-bedded or planar-laminated, scour fills.|siliciclastic sedimentary rock|||N||17-JAN-23
Governor River Phyllite|73363|Governor Formation|21895|||Yes|Formation, beds|Formal|Variation of reserved name|Briefly described|Franklin Metamorphic Complex|34211||||||||||||||||No|63167||||||Reserved by Fitzsimmons (1989) as Governor Formation (not published?).|Intensely sheared, relatively fine-grained phyllite (phyllonite).|metasedimentary siliciclastic rock|||N||17-JAN-23
Grahams Road Volcanics|74915|Bold Head Volcanics|74596|||Yes|Formation, beds|Formal|Resvd name published|Defined|Skipworth Subgroup|37342|||Ediacaran||||eruption|Ediacaran|579|16|isotopic, Sm/Nd||||TAS|Yes|68241|69841|Calver, C.R (GSTAS).|08-DEC-08|Forsyth, S.|27-DEC-08|PROPOSED PUBLICATION: Calver, C.R. , 2008 (Compiler). Digital Geological Atlas 1:25,000 series, Sheet 2456. Grassy. Mineral Resources Tasmania.|Basalt, dolerite, (volcaniclastic) sandstone, (volcaniclastic) conglomerate, andesite, rhyolite (the latter just as clasts (??).|basic igneous rock|||N||17-JAN-23
Grandfathers Granite|40852|Grandfather's Granite|7676|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Carboniferous||||intrusion|Devonian||||||||No|63825||Leaman D.E., Richardson R.G.|15-APR-04|||Small body on west coast of Sorrell Peninsula but shown to extend offshore, western Tasmania. Published in Tasmania Department of Mines, Geological Survey Bulletin 66, 1989, p27.|Alkali-feldspar, S-type granite, felsic; strongly fractionated, reduced;  unfoliated, leucocratic, equigranular, medium- to coarse-grained rock of quartz, K-feldspar, plagioclase, biotite, muscovite and tourmaline, with accessory zircon and apatite.|acid intrusive rock|||Y|S-type|17-JAN-23
Grange Mudstone|27424|||||Yes|Formation, beds|Formal|Other new published name|Described|Cascades Group|3730|||Artinskian||||deposition|Sakmarian||||||||No|66174||||||Age: Bernacchian. Replaced by Deep Bay Formation in Kingborough area.||siliciclastic sedimentary rock|||N||17-JAN-23
Granite Tor Granite|7688|||||Yes|Formation, beds|Formal|Other new published name|Described|||Conical Rocks Suite|79588|Upper Devonian|355|6|isotopic, K/Ar|intrusion|Upper Devonian|375|||||||No|73369||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Part of the Heemskirk-Granite Tor subsurface ridge.|S-type, coarse-grained, muscovite-biotite alkali-feldspar granite - with megacrysts of K-feldspar; accessory minerals of zircon, apatite and garnet; tourmaline present at some localities.|acid intrusive rock|||Y|S-type|17-JAN-23
Grant Point Granite|7697|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Gardens Suite|31503|Upper Devonian||||intrusion|Middle Devonian||||||||No|35826||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). See also Grants Point Granite - actual place name is Grants Point, but Grant Point may have become the accepted name due to common usage?|I-type biotite granite|acid intrusive rock|||Y||17-JAN-23
Granton Limestone and Marl|25027|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||||||deposition|||||||||No|43876||||||||carbonate sedimentary rock|||N||17-JAN-23
Grassy Group|7717|||||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Ediacaran|575|3|isotopic, U/Pb-Pb/Pb ion probe||Cryogenian|650||isotopic, U/Pb-Pb/Pb ion probe||150|2000||No|31733|69841|||||On King Island (TAS). Max age: ca650Ma from detrital zircon population (Calver, 2007). Scheelite-bearing metamorphosed/metasomatised pelitic and calcareous sedimentary rocks adjacent to Late Devonian Grassy Granodiorite.  A relatively undeformed and unmetamorphosed succession conformably overlying a siltstone unit occupying most of the central island.|A relatively undeformed and unmetamorphosed succession of conglomerate and finer-grained clastic rocks with dolomite and mafic volcanics. Mafic sequence: volcano-sedimentary shelf succession including dolostone, diamictite and tholeiitic basalt.|sedimentary rock|basic volcanic rock||N||17-JAN-23
Grassy Suite|31585|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Mississippian|||||Upper Devonian||||||||No|44105||||||King Island. Ages from constituent units [Jul-2013]. May be superseded by Sandblow Suite?|||||Y|I-type|17-JAN-23
Gray Siltstone|7726|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||deposition|||||||||No|30155||||||Name preferred over Gray Formation (per email S. Forsyth, 21/8/08)||siliciclastic sedimentary rock|||N||17-JAN-23
Great Dome Sandstone|25935|Great Dome sandstone|7734|||Yes|Formation, beds|Formal|Other new published name|Defined|Denison Group|5370|||Furongian||||deposition|Furongian||||||500|TAS|No|30274|30275||||||Fluvial to shallow-marine sandstone-siltstone-conglomerate sequences, typically turbiditic, quartz-rich to polymict; Furongian fossils in places.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Great Lake Dolerite|7735|Great Lake dolerite|7736|||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||intrusion|||||||||No|33347||||||||basic intrusive rock|||Y||17-JAN-23
Grimes Intrusive Suite|37343|||||Yes|Group, Suite|Formal|Other new published name|Defined|||||Ediacaran|574.7|3|isotopic, U/Pb-Pb/Pb ion probe||Ediacaran|579|3|isotopic, U/Pb||15|150|TAS|Yes|62516||Direen N.|29-DEC-98|||Originally was a definition in PhD (N. Direen). Some ref regard this as part of the Grassy Group. This unit requires verification as there are no recorded constituents and unit has Formation rank rather than Suite? There is an Inconsistent use of names in the literature - Grimes Sills, Grimes Intrusives and Grimes Intrusive suite -  all informal.  Comprises sills that intrude Cottons Breccia, Cumberland Dolostone, Yarra Creek Shale and part of Rocky Cape Group.|Fine-grained andesitic rocks with cumulate base; forms sills. Wehrlite, gabbro, dolerite, diorite, andesite. locally vesicular.|intermediate intrusive rock|basic intrusive rock||Y||17-JAN-23
Guilfoyle Creek Basalt|75977|Miners Ridge Basalt|73326|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Middle Cambrian|||inferred, geological correlation|eruption|Early Cambrian|||inferred||||TAS|Yes|67654||Everard, J.L. (MRT)|24-MAY-11|Forsyth, S.|26-MAY-11|See Definition card. Proposed publication: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). In prep. (2011?) The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. Possibly allochthonous and tectonically emplaced in the Early Cambrian, before deposition of the Yolande River Sequence. Formerly correlated with basalts in Crimson Creek Formation (Crawford et al. 1992). [Note to ASUD staff: Use definition to update relationships with other units when this name published]|Amygdaloidal basaltic lava, breccia and volcaniclastics. Ophitic texture, with augite enclosing albitised plagioclase. Abundant chlorite (partly after olivine), epidote, tremolite-actinolite and carbonate in groundmass and amygdales.|basic volcanic rock|||N||17-JAN-23
Haleys New Country Granite|69566|Halleys New Country Granite|26604|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Haleys New Country Suite|79773|Upper Devonian||||intrusion|Middle Devonian||||||||No|63540||||||Spelling used in MRT Tasmanian granite Mineralisation Potential - Data CD 2005. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). See also Haleys New Country granodiorite.|I-type biotite-(hornblende) monzogranite|acid intrusive rock|||Y|I-type|17-JAN-23
Haleys New Country Suite|79773|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Carboniferous|||||Devonian||||||||No|69876|||||||I-type granite, similar texture to Poimena Granite, but is slightly darker and contains minor amounts of hornblende in addition to biotite.|acid intrusive rock|||Y|I-type|17-JAN-23
Halls Formation|7994|||||Yes|Formation, beds|Formal|Other new published name|Defined|Luina Group|75980|||Early Cambrian||||deposition|Ediacaran|||||||TAS|Yes|30294||||Forsyth, S.|16-JUN-11|See also Hall's Formation, Hall Formation. To become part of the Luina Group (when this name is published). Luina Group constituent units: Deep Creek Volcanics (bottom), Halls Formation and Crescent Spur Sandstone (top) (Collins 1983). IN: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). 2011. The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. p111-113.|Light to dark grey and purple shale and fine-grained tuff, with limestone, grey-green-red chert, greywacke, basic tuff and basalt.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Harford Formation|79583|Harford beds|69661|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Eocene|38.1|.6|inferred, overlying unit|deposition|Paleocene|||||||TAS|No|69879||||||May be a formalisation of Harford beds (unit no. 69661); no definition / redefinition has yet (2016) been indexed.|Dominant mudstone: also sandstone, lesser carbonaceous claystone and coal, siltstone beds. Conglomerate of reworked pisoliths suggests erosional break at top.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Harrisons Opening Formation|40964|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||Tonian||||deposition|Tonian||||||||No|67501||C.R. Calver, S.M. Forsyth & J.L. Everard|07-MAY-04|||C.R. Calver, S.M. Forsyth & J.L. Everard (in press): Explanatory Notes for Maydena, Skeleton, Nevada, Weld and Picton 1:25000 Digital Geological Mapsheets.|Conglomerate and lithicwacke as graded beds, with interbedded grey siltstone and grey to black phyllite; below black-dark grey phyllite or slate, locally pyritic, lesser quartz siltstone, sandstone and quartz wacke as thin beds; minor diamictite.|siliciclastic sedimentary rock|||N||17-JAN-23
Harts Hill Limestone|23643|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Artinskian||||deposition|Artinskian|||||||TAS|No|39234|41895|N.Farmer|28-FEB-78||||Glaciomarine limestone.|carbonate sedimentary rock|||N||17-JAN-23
Havelock Bluff Formation|79492|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Ironbound Group|40963|||Cambrian||||deposition|Cambrian||||||300||No|69874|||||||A locally-derived basal breccia followed by siliciclastic pebble conglomerates followed by pink quartzites with indistinct bedding.|siliciclastic sedimentary rock|||N||17-JAN-23
Heazlewood River Complex|8232|||||Yes|Group, Suite|Formal|Unknown or process pending|Described|||||Middle Cambrian|506||inferred, geological correlation|magmatic crystallisation|Early Cambrian|513|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|32941||||||Contains ultramafic associations. See also Heazlewood Complex and Heazlewood Ultramafic Complex - the latter may have superseded Heazlewood  River Complex? Age is of end magmatic, minor phase tonalite: 513.6 +/-5.0Ma. It appears that the same analyses were reported in 1998 as 510+/-6 Ma. Allochthon emplacement is said to have taken place prior to middle Middle Cambrian (ie prior to 506 Ma).|Ophiolite sheet; foliated amphibolite, mylonite, ultramafics, units of serpentinitic melange, tonalite and related rocks, gabbro, boninitic lavas, low-Ti tholeiitic lavas.|metamorphosed ultramafic rock|||N||17-JAN-23
Heemskirk Red Granite|75564|Heemskirk (red) Granite|8243|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Heemskirk Red Suite|79590|Famennian|359.9|1.9|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Famennian|360.9|1.9|inferred, intrusive relationship|||||No|66575||McClenaghan, M.P., Everard, J.L after Burrett, C.F. (MRT)|18-DEC-09|||Accepting established usage. The red I-type phase of Heemskirk Granite. Part of Heemskirk Batholith - of which the red part occupies the upper section of intrusion and has been intruded by the white granite, which is the western and major part of the body. Part of Rocky Cape Element. Part of the South West Coast granites. See RefID 61723 p819 for discussion on age.|I-type. Red, fine-v/coarse biotite-hornblende adamellite/alkali feldspar granite: perthitic K-feldspar (iron oxide inclusions), smoky quartz-tourmaline, plagioclase (if zoned no Ca core); no hornblende if leucocratic. Crystal-fractionated.|acid intrusive rock|||Y|I-type|17-JAN-23
Heemskirk Red Suite|79590|||||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||||Carboniferous|||||Upper Devonian||||||||No|69876|||||||I-type moderately peraluminous to metaluminous granite with minor hornblende. Moderately fractionated. Contains magnetite, sphene, allanite. Pink feldspar consistent with I-type character indicated by other minerals.|acid intrusive rock|||Y|I-type|17-JAN-23
Heemskirk White Granite|75563|Heemskirk (white) Granite|26609|||Yes|Formation, beds|Reserved|Variation of published name|Briefly described|||Conical Rocks Suite|79588|Mississippian|359.9|1.9|inferred, intrusive relationship|intrusion|Upper Devonian|360.9|1.9|isotopic, U/Pb-Pb/Pb ion probe|||||No|66575||McClenaghan, M.P., Everard, J.L after Burrett, C.F. (MRT)|18-DEC-09|||Accepting established usage. The white S-type phase of Heemskirk Granite. Part of the Heemskirk Batholith - of which it forms the western section, also the major part. Contains a tourmaline nodular facies at contact with the red granite.  Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). See RefID 61723 p819 for discussion on age. See also informal Heemskirk white granite.|S-type. White, fine-coarse grained, Al-rich biotite adamellite/alkali-feldspar granite: quartz/tourmaline abundant in nodules/patches/veins, perthitic K-feldspar(white), plagioclase. Accessory apatite, zircon, ilmenite, monazite, fluorite, topaz.|acid intrusive rock|||Y|S-type|17-JAN-23
Helicidae Sandstone|8258|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|38031||||||||siliciclastic sedimentary rock|||N||17-JAN-23
Hellyer Basalt|30401|||||Yes|Formation, beds|Formal|Other new published name|Described|Que-Hellyer Volcanics|30220|||Middle Cambrian||||eruption|Middle Cambrian||||||||No|43134||||||Located at top of Que-Hellyer Volcanics (Geological evolution of Tasmania, 2014, p175).|Sequence of pillowed to massive, amygdaloidal, basaltic to andesitic rocks.|basic volcanic rock|||N||17-JAN-23
Henbury Granite|40854|Ben Lomond Granite|1453|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Henbury Suite|40853|Upper Devonian|376.5|2.7||intrusion|Upper Devonian|376.5|2.7||||||No|63540||Everard J.L., Findlay R.H., McClenaghan M.|15-APR-04|||Part of Ben Lomond Batholith (formerly Ben Lomond Granite). Used in unpublished manuscript of Everard J.L.&  Findlay R.H.. Intrudes Mathinna Supergroup.|I-type biotite alkali-feldspar granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Henbury Suite|40853|||||Yes|Group, Suite|Informal|Resvd name published|Briefly described|||||Upper Devonian|374||isotopic, U/Pb-Pb/Pb ion probe||Upper Devonian|379||isotopic, U/Pb-Pb/Pb ion probe|||||No|65646||Everard J.L., Findlay R.H., McClenaghan M.|15-APR-04|||South of Ben Lomond in NE Tasmania. Part of Ben Lomond Batholith. Used in unpublished manuscript of Everard J.L.&  Findlay R.H.. To be published by M. McClenaghan, Mineral Resources Tasmania.|Alkali-feldspar granite. I-type. Strongly crystal-fractionated; high Rb and low Sr. Metaluminous to peraluminous.|acid intrusive rock|||Y|I-type|17-JAN-23
Henrys Volcanic Member|75995|Henrys Volcanics|8275|||Yes|Member, phase|Reserved|Variation of published name|Reserved|||||||||eruption|||||||||No|||Everard, J.L. (MRT)|17-JUN-11|||Of  Halls Formation. Will replace Henrys Volcanics, Henrys basic volcanics.|||||N||17-JAN-23
Henrys Volcanics|8275|Henrys basic volcanics|8276|||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||eruption|||||||||No|37052|||||||||||N||17-JAN-23
Henty-Yolande Greywacke|25052|||||Yes|Formation, beds|Formal|Other new published name|Mentioned||||||||||||||||||No|32794|||||||||||N||17-JAN-23
Hercules Pumice Formation|73318|||||Yes|Formation, beds|Formal|Other new published name|Described|Northern Central Volcanic Complex|79500|||Drumian|||inferred, overlying unit|deposition|Drumian|||inferred, underlying unit|||||No|63238||||||Rosebery-Hercules footwall volcanic rocks - probably equiv. of Kershaw Pumice Formation. Occupy transitional position between Central Volcanic Complex lavas and the shale-bearing volcano-sed. hanging wall units of Southwell Subgroup above (Gifkin 2001).|Pumice breccia, up to 800m thick, consisting of a series of graded, syn-eruptive mass-flow deposits, individually up to 200m thick, with some intercalated felsic lavas and sills.|acid volcanic rock|||N||17-JAN-23
Heytesbury Group|8311|Heytesbury Formation|77294|||Yes|Group, Suite|Formal|Other new published name|Redefined|||||Messinian|6.2|2.3|fission track|weathering|Rupelian|29||biozone|deposition||698|VIC|No|48581|31036|||||Gambier Basin. See also Lexicon. SJ54-11,12. Upgraded from Heytesbury Formation to Group by Glenie (1971)[ but also appears in Baker (1953) Fig.1 p126] .|Calcareous quartz sand, sandy limestone, limestone, marl, & calcareous clay.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Hickman Formation|29207|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian|||||||TAS|No|39234|41895|N.Farmer|22-FEB-78||||Dark grey glaciomarine siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Higgins Creek sequence|79493|Higgins Creek Sequence|73319|||Yes|Subgroup|Informal|Variation of published name|Briefly described|Owen Group|34165|||Late Cambrian|||||Late Cambrian||||||||No|69874||||||An informal variation on another informal and non-current name, the Higgins Creek Sequence (unit no. 73319).|||||N||17-JAN-23
Hippo Basalt|83653|Studland Bay Basalts|17461|||Yes|Formation, beds|Reserved|Reserved|Reserved|||||Neogene|||inferred||Paleogene|||inferred|||||No|||Fox, J. (UTas)|22-OCT-22|||Tasmania 1:25,000 Geology 3048 (Studland) & 3049 (Grim). Named after Hippo Point. This basalt was formerly assigned to the Studland Bay Basalts, an extrusive unit. The new proposed unit is entirely intrusive. It intruded into the Woolnorth Tuff when the Woolnorth Tuff was un- or poorly consolidated and wet. The basalt forms domes that are interpreted to be cryptodomes. The basalt comprises altered olivine phenocrysts (<400 micro m, <20 vol%) in a groundmass of plagioclase laths (400 micro m, >80 vol.%). Rare clinopyroxene phenocrysts (400 micro m, <0.5 vol.%) are also present. The plagioclase laths are coarser grained than the plagioclase laths present in the Studland Bay Basalt however the whole rock geochemistry of the two units is broadly similar. To be published = Australian Journal of Earth Sciences 2022 or early 2023.|Intrusive basalt.|basic intrusive rock|||Y||17-JAN-23
Hippolyte Rocks Granite|40843|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Boobyalla Suite|31666|Middle Devonian|373.8|2.6||intrusion|Middle Devonian|373.8|2.6|isotopic, U/Pb-Pb/Pb ion probe|||||No|63540||McClenaghan M.|15-APR-04|||For use in report on geochemistry of the Tasmanian Devonian granites. One of the informally grouped South Eastern Tasmania Granites which forms a small island east of the Tasman Peninsula.|Slightly peraluminous felsic granite. S-type granite; strongly fractionated, reduced.|acid intrusive rock|||Y|S-type|17-JAN-23
Hodge Formation|8399|Hodge Slate|8400|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Dundas Group|26529|||Middle Cambrian||||deposition|Middle Cambrian||||||||No|41795|||||||Fossiliferous sequence of dark grey to black indurated siltstone, mudstone and minor lithic sandstone horizons; sandstone increases upwards; fossils include dendroids and hydroids.|siliciclastic sedimentary rock|||N||17-JAN-23
Hogan Island Granite|26616|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Hogan Island Suite|31587|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Briefly described. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |S-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Hogan Island Suite|31587|||||Yes|Group, Suite|Formal|Other new published name|Briefly described||||||||||||||||||No|42726|||||||||||Y||17-JAN-23
Hogans Hill Granite|8412|Hogans Hill granite|8413|||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the  2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type adamellite/granite containing biotite and minor amounts of garnet and/or cordierite, miarolitic cavities.|acid intrusive rock|||Y||17-JAN-23
Hogans Road Diorite|75562|Hogans Road Granite|73642|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Devonian||||intrusion|Devonian||||||||No|66575||McClenaghan, M.P., Everard, J.L. (MRT)|18-DEC-09|||Intended to replace both Hogans Road Granite and the informal Hogans Road diorite.|Diorite considered to have largest mantle component of all Blue Tier Batholith intrusives.|intermediate intrusive rock|||Y|I-type|17-JAN-23
Hogans Road Granite|73642|Hogans Road diorite|8414|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Devonian||||intrusion|Devonian||||||||No|63540||||||See also Hogans Road diorite. To be replaced by Hogans Road Diorite.||acid intrusive rock|||Y|I-type|17-JAN-23
Hogarth Road Granite|40861|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Russells Road Suite|31541|Middle Devonian||||intrusion|Middle Devonian|387.8|2.3|isotopic, U/Pb-Pb/Pb ion probe|intrusion||||No|63540||McClenaghan M. P.|15-APR-04|||South of Scottsdale in NE Tasmania. Part of Scottsdale Batholith. Used in Alberton 1:50 000 geological map key (1993). Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |I-type biotite monzogranite; coarse to very coarse-grained equigranular to sparsely porphyritic, with megacrysts of K-feldspar.|acid intrusive rock|||Y|I-type|17-JAN-23
Hollway Andesite|30398|||||Yes|Formation, beds|Formal|Other new published name|Described|Central Volcanic Complex|3868|||Late Cambrian||||eruption|Middle Cambrian||||||||No|43132|||||||Basaltic to andesitic lavas, breccias, volcaniclastics, with intercalated dacites.|intermediate volcanic rock|basic volcanic rock||N||17-JAN-23
Hope Gate Formation|8481|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|41913|||||||||||N||17-JAN-23
Housetop Granite|8532|||||Yes|Formation, beds|Formal|Other new published name|Described|||Housetop Suite|31588|Upper Devonian||||intrusion|Upper Devonian|373.6|1.8|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|73369||||||After Jennings, I.B. 1959. See also variant, Redwater Granite, and the outlier, Valentines Peak Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). This apparently magnetic intrusion is in fact a partly overthrust body underlain by ultramafics.|Monzogranite to alkali-feldspar granite - felsic, weakly to moderately fractionated; oxidised I-type.|acid intrusive rock|||Y|I-type|17-JAN-23
Housetop Suite|31588|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Carboniferous|||||Devonian||||||||No|42726|||||||I-type moderately peraluminous to metaluminous granites with minor hornblende. Moderately to strongly crystal-fractionated. Contains magnetite, sphene, allanite.|acid intrusive rock|||Y||17-JAN-23
Hudson River Pyroclastics|8552|||||Yes|Formation, beds|Formal|Other new published name|Briefly described||||||||||||||||||No|41143|||||||Sequence of tuffaceous sandstone and shale intercalated with tuffs, volcaniclastics and rhyolitic lavas.||||N||17-JAN-23
Humboldt Formation|78477|Humboldt Slate and Dolomite|73330|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Clark Group|4102|||Proterozoic||||deposition|Proterozoic||||||||No|65652||||||This unit might replace the Humboldt Slate and Dolomite. See also Humboldt Slate, Humboldt Dolomite, Humboldt Complex, and Humboldt complex.|Basal interbedded dolomitic mudstone, siltstone, intraclastic conglomerate; interbedded impure dolostone, dolomitic mudstone, siltstone and rare limestone; interlaminated siltstone and mudstone; local dolostone cap with abundant domical stromatolites|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Huon River Formation|24313|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Pandani Group|24450|||Precambrian||||deposition|Precambrian|||||||TAS|Yes|42227|42227|Calver C.R.|10-NOV-88|||?Replaced Clear Creek Formation?|Pelite (phyllite, slate or mudstone) with lesser, interlayered dolomite and minor quartzarenite.||||N||17-JAN-23
Huskisson Group|8600|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Late Cambrian|||||Middle Cambrian||||||||No|31174|||||||Clastic sedimentary sequence of laminated and thinly bedded siltstone and mudstone in which numerous horizons of mass-flow conglomerate and sandstone have been deposited.|fine grained siliciclastic rock|||N||17-JAN-23
Huxley Formation|8618|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|41993|||||||||||N||17-JAN-23
Ida Bay Limestone|8639|||||Yes|Formation, beds|Formal|Unknown or process pending|Briefly described|Gordon Group|7586|||Upper Ordovician||||deposition|Upper Ordovician||||||||No|40127||||||See also Ida Bay Formation.||carbonate sedimentary rock|||N||17-JAN-23
Idaho Formation|23659|||||Yes|Formation, beds|Formal|Resvd name published|Mentioned|||||||||deposition|||||||||No|41993||Fitzsimons S.J.|17-MAR-89||||||||N||17-JAN-23
Ile des Phoques Granite|26626|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Middle Devonian||||intrusion|Devonian||||||||No|42726||||||Formal name not intended.|S-type granite, felsic; strongly fractionated, reduced.|acid intrusive rock|||Y|S-type|17-JAN-23
Ilfracombe Slate|8650|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Late Cambrian|||||Late Cambrian||||||||No|45922||||||Of Green (1959). Replaced by Corn Hill Beds at Leviathan Hill.|||||N||17-JAN-23
Industry Road Member|75366|||||Yes|Member, phase|Formal|Resvd name published|Defined|Turquoise Bluff Slate|18724|||Middle Ordovician|||inferred, overlying unit|deposition|Lower Ordovician|||inferred, underlying unit||1200|1300|TAS|Yes|67503|67493|Seymour, D. (MRT)|08-JUL-09|Forsyth, S.|07-SEP-10|Retreat 1:25 000 map sheet area (part of 8315). Interbedded phyllitic slate and foliated very fine-grained sandstone; ridge-forming; recumbent folds and cleavage; Ordovician age. Published in Mineral Resources Tasmania publications arising from TasExplore Project (late 2009 - 2010). Possible AJES paper(s) - 2010?|Interbedded phyllitic slate and foliated very fine-grained sandstone; ridge-forming; recumbent folds and cleavage|metasedimentary siliciclastic rock|||N||17-JAN-23
Inglis Siltstone|25077|||||Yes|Formation, beds|Formal|Other new published name|Described|Lower Parmeener Supergroup|10795|||Cisuralian||||deposition|Cisuralian||||||||No|30153||||||See also Mount Inglis Sandstone, Inglis Formation.  Age: Tamarian Stage of Rekunian Series.|Dominantly medium to dark grey, poorly bedded siltstone, mudstone and fine-grained sandstone, typically with cuboidal fracture; locally micaceous or pyritic.  More sandy and with marine fossils towards the top of the unit.|siliciclastic sedimentary rock|||N||17-JAN-23
Intercolonial Volcanics|8742|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||eruption|||||||||No|33218|||||||Volcanics|igneous volcanic rock|||N||17-JAN-23
Interview Granite|8743|Pieman Granite|15177|||Yes|Formation, beds|Formal|Other new published name|Described|||Interview Suite|31593|Upper Devonian||||intrusion|Upper Devonian|362.4|1.9|isotopic, U/Pb-Pb/Pb ion probe|||||No|40073||||||Intrudes Rocky Cape Group. Previously thought that Sandy Cape Granite may be part of this body but it is a more strongly fractionated alkali-feldspar granite. North of Pieman River. Age is from Sandy Cape.|S-type. Biotite monzogranite - equigranular, medium to coarse-grained.|acid intrusive rock|||Y|S-type|17-JAN-23
Interview Suite|31593|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Devonian|||||Devonian||||||||No|42726||||||May be replaced by Sandy Cape Suite in 2016?|S-type. Strongly peraluminous granites with very strong crystal fractionation. Contains Al-rich minerals cordierite, garnet, muscovite.|acid intrusive rock|||Y|S-type|17-JAN-23
Irby Siltstone|8767|||||Yes|Formation, beds|Formal|Other new published name|Described|Rocky Cape Group|27555|||Ediacaran|630|10|isotopic, K/Ar|deposition|Ectasian|1309|12|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||750||No|30877||||||Of Gee (1968). K-Ar slate ages 643 +/- 10 and 630+/- 10 Ma. U-Pb detrital zircon analysis yielded a maximum depositional age of 1309+\-12 Ma, and an authigenic monazite age of c.500 Ma but this age is likley due to thermal overprinting (Halpin et al., 2014).|Dominantly siltstone with black shale, dolomite, sub-greywacke and hematitic breccia.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Ironbound Group|40963|||||Yes|Group, Suite|Informal|Other new published name|Briefly described|||||Furongian|||||Furongian||||||||No|69859||||||Findlay, R.H. 1994.  The Ironbound Group of southern Tasmania; new data bearing on the Cambro-Ordovician relationship between Tasmania and northern Victoria Land, Antarctica.  Mineral Resources Tasmania Unpublished Report 1994/14.|Includes two informal subdivisions. 1: Quartzwacke and conglomerate (Caq).  2: Dominantly siliceous conglomerate and sandstone (Cac).|siliciclastic sedimentary rock|||N||17-JAN-23
Isandula Conglomerate|8798|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Middle Cambrian||||deposition|Middle Cambrian||||||||No|41109||||||See also Isadulla Conglomerate.|Contains clasts of allochthon-derived basalt and red cherty argillite, as well as quartzite.|siliciclastic sedimentary rock|||N||17-JAN-23
Island Road Formation|23663|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Middle Cambrian||||deposition|Middle Cambrian||||||||No|41562||N.J.Turner|02-APR-86|||Adamsfield Trough area.|Granule to (rare) boulder conglomerate interbedded with sandstone; overlain by mostly interbedded lithicwacke sandstone, siltstone and mudstone. Graded bedding is typical; clastic detritus is quartzite-dominated.|siliciclastic sedimentary rock|||N||17-JAN-23
Jackey Shale|8827|Jackey Formation|27803|||Yes|Formation, beds|Formal|Variation of published name|Described|Upper Parmeener Supergroup|18944|||Triassic||||deposition|Permian||||||||No|34009||||||See also Jackey Formation (of McKellar, 1957), which may have been superseded by Jackey Shale? Referred to as Jackey Shale in the text (Geological Evolution of Tasmania, 2014, p376 and p378), though is Jackey Formation in sub-heading (p376).|Comprises cross-bedded quartz sandstone, "grit" and carbonaceous feldspathic sandstone with some mud pellets, interbedded with thinly laminated dark grey shale; well-sorted and micaceous;  some coal.|siliciclastic sedimentary rock|||N||17-JAN-23
Jacob Quartzite|8833|||||Yes|Formation, beds|Formal|Other new published name|Described|Rocky Cape Group|27555|||Neoproterozoic|750||inferred, geological correlation|deposition|Mesoproterozoic|1010|45|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||1100||No|30877||||||Of Gee (1968). Maximum depositional age from detrital zircon 1010+/-45 Ma, but likely age~1000-750 Ma range (2004 ref). More recent studies by Halpin et al. 2014 suggests deposition might have been earlier and gave an authigenic monazite (minimum) age of c. 500 Ma but this age is likley due to thermal overprinting (Halpin et al., 2014).|Well-bedded, supermature quartzarenite with minor impersistent siltstone horizons; abundant planar-tabular cross-bedding and ripple marks.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Jane Dolomite|8867|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Proterozoic||||deposition|Proterozoic||||||||No|31172|||||||Consists of great thicknesses of dolomite with thin basal siliciclastic rocks and associated units of diamictite; Fine-grained, poorly-bedded, white to pale grey dolostone and minor dolomitic breccia.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Joan Point Sandstone|23672|||||Yes|Formation, beds|Formal|Other new published name|Defined|Clytie Cove Group|23491|||Cambrian||||deposition|Proterozoic|||||||TAS|No|37412|37412|P.R.Williams|15-SEP-77||||Consists of medium-grained sandstone interbedded with mudstone which increases in proportion upwards.|siliciclastic sedimentary rock|||N||17-JAN-23
Johnston Creek Siltstone|73337|||||Yes|Formation, beds|Formal|Other new published name|Described|Eldon Group|27768|||Early Silurian||||deposition|Upper Ordovician||||||||No|65646||||||Geological Evolution of Tasmania (2014, text on p266 says Early Devonian (Pragian) Corn Hill Formation unconformably overlies Johnson Creek Siltstone (Late Ordovician or Early Silurian).|Massive sandstone, flaser bedded sandstone and siltstone, and graphitic shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Johnston Point Sandstone|35500|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian||||||||No|23222||||||See also Banks, Hale & Yaxley (1955), Pap & Proc Roy Soc Tas 89 p219-229. Occurs on Satellite Island, W of Alonnah, Bruny Island. Age: Tamarian. Banks et al state that the name is to be changed to Alonnah Sandstone, but original name used 1993.||siliciclastic sedimentary rock|||N||17-JAN-23
Joyce Group|73360|Joyce "Group"|35848|||Yes|Group, Suite|Formal|Variation of published name|Briefly described||||||||||||||||||No|63167|||||||||||N||17-JAN-23
Judith Formation|9052|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Dundas Group|26529|||Middle Cambrian||||deposition|Middle Cambrian|507|||||||No|41814|||||||Fossiliferous sequence with angular to rounded clasts of quartzite, jasper, chert, siltstone, carbonate and basalt set in a silt to coarse sand matrix.|sedimentary rock|basic volcanic rock||N||11-SEP-23
Jukes Conglomerate|25095|Jukes Breccia|9056|||Yes|Formation, beds|Formal|Other new published name|Described|Denison Group|5370|||Late Cambrian||||deposition|Late Cambrian||||||||No|34501||||||Probably supersedes Jukes Breccia (of Hills 1914a). Should not be correlated with Jukes Formation. Formerly included in old Junee Group.|Discontinuous lenses of volcaniclastic conglomerate, sandstone and breccia, commonly of local derivation.|siliciclastic sedimentary rock|||N||17-JAN-23
Julius River Member|35330|Trowutta Breccia|18612|||Yes|Member, phase|Formal|Resvd name published|Defined|Black River Dolomite|1824|||Cryogenian|641|5|isotopic, Re/Os|deposition|Cryogenian||||||200|TAS|No|23191||||||Smithton Basin. Reserved as Julius River Mixtite Member by Everard, J.L. (1996). May disconformably overlie the rest of the Black River Dolomite, with considerable time gap, if correlates with Sturtian glacials of SA.|Dolomitic breccia with clasts of dolomite, stromatolitic dolomite and oolitic chert in a dolomitic matrix.|carbonate sedimentary rock|||N||17-JAN-23
Jurassic mafic intrusives 76559|76559|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Middle Jurassic|174|||intrusion|Middle Jurassic|175|||||||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
Kanmantoo Group|28634|||||Yes|Group, Suite|Formal|Variation of published name|Fully described|Moralana Supergroup|26314|||Early Cambrian|514|3|||Early Cambrian|522|2|inferred, underlying unit|||9000||No|65624||||||In the Adelaide Fold Belt., Kanmantoo Trough.  Minimum age from earliest Delamerian Orogeny magmatism. Part of the Moralana Supergroup in South Australia. May extend into NSW? Probably not Tas.|Marine metasandstone, phyllite, schist, gneiss, minor calcsilicate and marble. Sandstone; siltstone, occasionally sulphidic; metamorphosed. Also basalt/dolerite undercover.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||08-SEP-23
Kansas Creek beds|73369|Kansas Creek Beds|9251|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Lower Parmeener Supergroup|10795|||Asselian|||||Asselian||||||||No|63172|||||||Richly fossiliferous pebbly siltstone, limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Kanunnah Subgroup|34163|||||Yes|Subgroup|Formal|Other new published name|Defined|Togari Group|23016|||Ediacaran|582|4|isotopic, U/Pb||Cryogenian|650|||||1000||No|44135||||||This is a northwestern Tasmania equivalent to the Grassy Group on King Island. Intrudes Rocky Cape Group.|Comprises turbiditic, mafic-derived volcaniclastic sandstone (Keppel Ck.Fm), shale, diamictite (Croles Hill Diamictite) and tholeiitic basalts (Spinks Ck. Volcanics).|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Kaoota Coal Measures|23683|||||Yes|Formation, beds|Formal|Other new published name|Described|Parmeener Supergroup, Upper|68522|||Triassic||||deposition|Triassic||||||||No|39234||N.Farmer|04-JUL-77|||Also known as Sandfly Coal Measures.|Predominantly lithic sandstone and siltstone with coal seams.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Karmberg Limestone|9290|||||Yes|Formation, beds|Formal|Other new published name|Defined|Gordon Group|7586|||Darriwilian||||deposition|Lower Ordovician||||||500|TAS|No|30277|30277||||||Limestone, dark argillaceous micrite (lime mudstone) and calcareous siltstone; nodular appearance of anastomosing stylolitic seams; fossils; chert nodules and irregular beds.|carbonate sedimentary rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Keel Quartzite|25112|||||Yes|Formation, beds|Formal|Other new published name|Described|Eldon Group|27768|||Wenlock|||||Wenlock||||||60||No|31648||||||See also Keel Formation.|Cross-bedded sandstone lithology varies from area to area. Contains rare tentaculitids in Zeehan area.|siliciclastic sedimentary rock|||N||17-JAN-23
Keith Schist|35366|Keith Metamorphics|9385|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Arthur Metamorphic Complex|647|||Neoproterozoic|||||Mesoproterozoic||||||||No|23191|||||||Quartz-mica schist, quartzite, phyllite and rare dolomite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Kelcey Tier beds|74359|Kelcey Tier Beds|9389|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Late Permian|||||Cisuralian||||||||No|63172||||||See also Kelcey Tier Beds.  Ice-rafted dropstones occur sporadically throughout the sequence indicating presence of ice until the end of the marine deposition.|||||N||17-JAN-23
Kempton coals|9428|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||||||deposition|||||||||No|41911||||||||organic rich sedimentary rock|||N||17-JAN-23
Kent Bay Granite|9445|Kent Bay granite|23694|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Royal George Suite|40845|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||See also Passage Island Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type adamellite/granite containing biotite and minor amounts of garnet and/or cordierite.|acid intrusive rock|||Y||17-JAN-23
Kent Group|28641|||||Yes|Group, Suite|Formal|Variation of published name|Mentioned||||||||||||||||||No|41563|||||||||||N||17-JAN-23
Kentish Volcanics|9446|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Dundas Group|26529|||||||eruption|||||||1400||No|24548||||||Of Wells (1957).|Belt of greyish-green basic lava and pyroclastic rocks, outcropping at Quamby Brook.|basic volcanic rock|||N||17-JAN-23
Keppel Creek Formation|22085|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Kanunnah Subgroup|34163|||Ediacaran|582.1|4.1|isotopic, U/Pb-Pb/Pb ion probe|deposition|Cryogenian|||||||TAS|No|23191||Everard J.L.|14-MAY-92|||Late Precambrian and Cambrian, Smithton Basin. Within the Kannunah Subgroup. Overlain by an unnamed but dated rhyodacite (age: 582+/-4Ma|Thinly bedded to massive, commonly cuboidally fracturing lithicwacke sandstone, lithicwacke siltstone and subordinate conglomerate,lithicarenite, hematitic ironstone, mudstone, impure limestone, dolomitic siltstone and laminated dolomite.|siliciclastic sedimentary rock|||N||17-JAN-23
Kerrison Volcanics|9474|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||Middle Cambrian||||eruption|Middle Cambrian||||||||No|45087|||||||||||N||17-JAN-23
Kershaw Pumice Formation|73323|||||Yes|Formation, beds|Formal|Other new published name|Described|Northern Central Volcanic Complex|79500|||Drumian||||deposition|Drumian|503.4|1.3||||||No|63238||||||See also the informal "Kershaw Pumice Formation".|Pumice breccia, up to 800m thick, consisting of a series of graded, syn-eruptive mass-flow deposits, individually up to 200m thick, with some intercalated felsic lavas and sills.|igneous volcanic rock|||N||17-JAN-23
Key Bay Granite|69575|Key Bay granite|23696|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|63540||MRT|09-AUG-05|||MRT Tasmanian granites map, 2005|S-type adamellite/granite containing biotite and minor amounts of garnet and/or cordierite.|acid intrusive rock|||Y||17-JAN-23
Killiecrankie Granite|9560|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||Vicary M.J.|24-SEP-07|||North coast of Flinders Island. Introduced in Vicary M.J., 1987, 'The granitoids of northern Flinders Island', BSc(Hons), ANU. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
King Island Granite|34212|||||Yes|Formation, beds|Formal|Variation of published name|Described|West Coast Granite|41360|||Neoproterozoic|748|12||intrusion|Neoproterozoic|767|12||||||No|22668||||||||acid intrusive rock|||Y||17-JAN-23
King Island Tillite|9595|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|32778||||||See also King Island Mixtite. Use of name not valid due to King Island Granite being in use.|||||N||17-JAN-23
King Island lamprophyres|9599|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Cretaceous|||inferred||Jurassic|||inferred|||||No|73369||||||A small dyke south of Naracooopa was dated by McDougall and Leggo (1965) (RefID 73369) at ca. 140 Ma. Generalised location from McDougall and Leggo (1965). See also King Island biotite lamprophyre, King Island lamprophyre.|lamprophyre dykes including olivine minette.|exotic composition igneous rock|||N||17-JAN-23
Knocklofty Formation|9681|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Upper Parmeener Supergroup|18944|||Middle Triassic||||deposition|Lower Triassic||||||220||No|63868||||||See also other variations on the name. See also Knocklofty Sandstone and Siltstone - names used interchangeably.|Well-sorted, glistening quartz sandstone in fining-upward cycles, often with basal mud-pellet conglomerate or quartz granules; cycles are massive or tabular, cross-bedded or planar-laminated, scour fills.|siliciclastic sedimentary rock|||N||17-JAN-23
Kopanica Formation|9810|||||Yes|Formation, beds|Formal|Other new published name|Described|Liffey Group|27464|||Permian||||deposition|Permian||||||||No|24549|||||||Grey to black shales essentially, with thin bands of white sandstone||||N||17-JAN-23
La Perouse Formation|30019|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|43072|||||||||||N||17-JAN-23
Lachlan Conglomerate|73357|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Proterozoic||||deposition|Proterozoic||||||||No|63167||||||Age assumed from age of overlying Jane Dolomite.|Angular to rounded quartz and quartz fragments in foliated sandy matrix of elongate quartz, flattened pelitic fragments, sericite, chloritoid and hematite.|siliciclastic sedimentary rock|||N||17-JAN-23
Lackrana Sand|9995|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Holocene||||deposition|Holocene||||||||No|33358||||||Age is Upper Holocene.|||||N||17-JAN-23
Lady Barron Granite|33474|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Lady Barron Suite|31601|Upper Devonian||||intrusion|Middle Devonian||||||||No|63540||||||Briefly described as Lady Barren Granite (misspelt). General description in GSA Special Publication 15 p264, 258. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite-(garnet) monzogranite|acid intrusive rock|||Y||17-JAN-23
Lady Barron Suite|31601|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Middle Devonian|||||Middle Devonian||||||||No|42726|||||||S-type granites that contain cordierite (possibly restite) and muscovite.|acid intrusive rock|||Y||17-JAN-23
Lagoon River Quartzite|40962|||||Yes|Formation, beds|Formal|Other new published name|Described|Rocky Cape Group|27555|||Neoproterozoic|1315|23|isotopic, U/Pb|deposition|Neoproterozoic|1462|11|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|67502||||||Name used but not defined in: Bell, D.H. 1972. 1971-1972 Annual Report, north-western Tasmania, joint venture exploration.  In press: Regional geology of the southern Smithton Synclinorium: Explanatory Report for the Roger, Sumac and Dempster 1:25,000. Minimum depositional age constrained at 1346+\-12 Ma to 1315+\-23 Ma. U-Pb detrital zircon analysis yielded a maximum depositional age 1462+\-11 Ma. (Halpin et al., 2014)|Medium grained trough to parallel bedded quartzose sandstone and rare angular quartz-pebble conglomerate and shale.|siliciclastic sedimentary rock|||N||27-APR-23
Lake Holmes Coal Measures|10056|||||Yes|Formation, beds|Formal|Other new published name|Described|Lower Parmeener Supergroup|10795|||Cisuralian||||deposition|Cisuralian||||||||No|36817|||||||Contains a torbanite which is amost pure Reischia - occuring as a thin bed within the coal measures.|organic rich sedimentary rock|||N||17-JAN-23
Lake Judd Formation|24350|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Anne Group|24391|||Precambrian||||deposition|Precambrian|||||||TAS|Yes|42227|42227|Calver C.R.|05-JUL-85||||Phyllite and slate; planar, graded, commonly load-casted, quartz siltstone laminae; clastic dykes of siltstone abundant in pelite layers. Siltstone with minor fine-grained quartzarenite beds becomes dominant towards top of the unit.|metasedimentary siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Lake Timk Formation|24351|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Weld River Group|24566|||Late Cambrian||||deposition|Late Cambrian|||||||TAS|Yes|40852||Calver C.R.|05-JUL-85|||Fully described in Calver (1989) p46.|Pebbly dolomitic mudstone and siltstone, usually laminated.||||N||17-JAN-23
Lake Will Pebbly Siltstone|10077|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Cisuralian||||deposition|Cisuralian||||||||No|36817||||||||siliciclastic sedimentary rock|||N||17-JAN-23
Langloh Coal Measures|30085|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|43084||||||Variation on Langloh Seams A,B,C?||organic rich sedimentary rock|||N||17-JAN-23
Launceston Group|39916|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Neogene|||||Cenozoic||||||||No|24549|||||||||||N||17-JAN-23
Lemonthyme Tillite|10335|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||Pleistocene||||deposition|Pleistocene||||||||No|30524||||||See also Lemonthyme Rhythmites and Lemonthyme Formation. Age may be Oligocene?|||||N||17-JAN-23
Leonardsburgh Siltstone|74077|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|61395||||||||siliciclastic sedimentary rock|||N||17-JAN-23
Lewis Point Siltstone and Sandstone|40045|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Pennsylvanian||||||||No|23222||||||See also Banks, Hale & Yaxley (1955), Pap & Proc Roy Soc Tas 89 p219-229. Occurs on Satellite Island, W of Alonnah, Bruny Island. .Age: Tamarian||siliciclastic sedimentary rock|||N||17-JAN-23
Lewis River Volcanics|10368|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Mount Read Volcanics|13057|||Cambrian|||inferred|eruption|Cambrian|||inferred|||||No|41143|||||||Composed of quartz phyric rhyodacitic lavas and associated sedimentary rocks.|acid volcanic rock|||N||17-JAN-23
Liapota Sand|28678|||||Yes|Formation, beds|Formal|Other new published name|Described|||||||||deposition|||||||||No|33358|||||||||||N||17-JAN-23
Liffey Group|27464|||||Yes|Group, Suite|Formal|Variation of published name|Described|Parmeener Supergroup|14900|||Artinskian|||||Sakmarian||||||31||No|24549||||||Nomenclature is confused - names being used interchangeably but precedence is taken by Liffey Group. See also Liffey Sandstone and Liffey Formation.|Well-sorted, quartz-rich, cross-bedded sandstone, with interbedded conglomerate, carbonaceous siltstone, carbonaceous shales and mudstone; local coal.|siliciclastic sedimentary rock|||N||17-JAN-23
Linda Sandstone|73136|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||deposition|||||||||No|44135|||||||Shallow marine sequence of thin bedded, pink to grey, bioturbated sandstone and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Lindsay Quartzite|10435|||||Yes|Formation, beds|Formal|Other new published name|Mentioned||||||||||||||||||No|32463|||||||||||N||17-JAN-23
Lisle Granodiorite|40874|||||Yes|Formation, beds|Formal|Resvd name published|Described|||||Devonian|390|12|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Devonian|393.3|2|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|61723||Roach M.J., McClenaghan M.P.|15-APR-04|||Small outcrops in the general Lisle area, northeast Tasmania. Introduced by Roach M.J.,1994, 'The regional geophysical setting of gold mineralisation in northeast Tasmania', PhD thesis, U Tas.|Medium-grained equigranular hornblende-biotite granodiorite; with some variation from granodiorite to tonalite, quartz diorite xenoliths and some more siliceous granodioritic to aplitic dykes.|acid intrusive rock|||Y|I-type|17-JAN-23
Lisle Suite|73636|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Devonian|||||Devonian||||||||No||||||||||||N||17-JAN-23
Little Chalky Island Granodiorite|81980|Little Chalky Island Granite|10480|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Devonian|||||Devonian||||||||No|71730|||||||Unfractionated I-type granodiorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Little Mount Horror Granite|10484|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Lottah Suite|31603|Upper Devonian||||intrusion|Upper Devonian||||||||No|42726||||||Bassian Batholith of Chappell et al. 1991. Blue Tier Batholith of McClenaghan 1989. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Little Owen Andesite|30391|Little Owen andesite|25170|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||eruption|||||||||No|43131||||||||intermediate volcanic rock|||N||17-JAN-23
Little Rocky River Granite|10490|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Eastern Quartz-Phyric Sequence|73128|||Drumian||||intrusion|Drumian||||||||No|41143|||||||Granite.|acid intrusive rock|||Y||17-JAN-23
Little Trefoil Basalt|10491|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||eruption|||||||||No|45087|||||||Massive olivine tholeiite.|basic volcanic rock|||N||21-SEP-23
Lobster Creek Volcanics|10535|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Late Cambrian|480|18|isotopic, Rb/Sr|eruption|Middle Cambrian|500|3.5|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||300||No|45087|||||||Massive, unstratified, medium-grained, feldspar-phyric andesitic to dacitic volcanic rocks.|intermediate volcanic rock|||N||17-JAN-23
Loccota Granite|10536|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Middle Devonian||||intrusion|Devonian||||||||No|42726||||||Also used in Geol Soc Aust Special Publication 15 (1989) p 259. NOT variation of Loccota Grit. invalid but current name.||acid intrusive rock|||Y||17-JAN-23
Loccota Grit|10537|||||Yes|Formation, beds|Formal|Unknown or process pending|Described||||||||||||||||||No|33358|||||||||||N||17-JAN-23
Lone Star Siltstone|75363|Bellingham Formation|1426|||Yes|Formation, beds|Formal|Resvd name published|Defined|Panama Group|36814|||Ludlow|||biozone|deposition|Ludlow|||biozone|||2000|TAS|Yes|67503|67493|Seymour, D. (MRT), Woolward I.R.|08-JUL-09|Forsyth, S.|07-JUL-10|Lisle 1:25 000 map sheet area (part of 8415). Dominantly thin-bedded siltstone, with interbedded fine-grained sandstone increasing towards top; late Silurian (Ludlow)age based on graptolites. This is one of three new Formations replacing the interval previously occupied by the Bellingham Formation. It is proposed to retire usage of the Bellingham Formation name. Published in Mineral Resources Tasmania publications arising from TasExplore Project (late 2009 - 2010). Possible AJES paper(s) - 2010?|Dominantly thin-bedded siltstone, with interbedded fine-grained sandstone increasing towards top.|siliciclastic sedimentary rock|||N||17-JAN-23
Lonely Tarns Formation|26311|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Anne Group|24391|||Precambrian||||deposition|Precambrian|||||||TAS|Yes|42227|42227|Calver C.R.|05-JUL-85||||Unit of phyllite, slate and quartz siltstone.||||N||17-JAN-23
Long Bay Shale|28188|||||Yes|Formation, beds|Formal|Other new published name|Defined|Clytie Cove Group|23491|||Cambrian||||deposition|Proterozoic|||||||TAS|No|29875|37412||||||Interbedded mudstone, siltstone, sandstone and minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Long Point Granite|73645|Long Point Granodiorite|69574|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Long Point Suite|79591|Devonian|395.7|2.3||intrusion|Devonian|395.7|2.3||||||No|63540||||||Previously considered to be part of the Gardens Suite.|I-type granite, mafic to felsic; unfractionated, reduced.|acid intrusive rock|||Y|I-type|17-JAN-23
Long Point Suite|79591|||||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||||Lower Devonian|393||||Lower Devonian|397|||||||No|69876|||||||I-type granite, mafic enclaves.|acid intrusive rock|||Y|I-type|17-JAN-23
Long Toms Nose Granite|10627|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Looneys Flat Siltstone|78544|||||Yes|Formation, beds|Formal|Other new published name|Defined|Balfour Subgroup|40970|||Mesoproterozoic|1262|12|isotopic, U/Pb-Pb/Pb ICP-MS|deposition|Mesoproterozoic|||inferred|deposition|||TAS|No|67502|67502|||||Age poorly constrained by age of dolerite dykes intrusions into other Rocky Cape Group units, and slate ages (643+/-10Ma), and biostratigraphy and isotope chemostratigraphy of overlying Black River Dolomite (~750-650 Ma). Conformably overlain by correlate of Cowrie Siltstone. Authigenic monazite U-Pb LA- ICPMS age of 1262+\-12 Ma may represent cementation or metamorphism.|Grey to buff, micaceous fine-grained sandstone, interbedded with/grading up to planar laminated green siltstone with chlorite porphyroblasts. Locally contains members of thinly bedded medium-grained sandstone and thickly bedded quartzarenite.|siliciclastic sedimentary rock|||N||17-JAN-23
Loorana Granite|75978|Cape Wickham Granite|69914|||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Tonian|748|2|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Tonian|748|2|isotopic, U/Pb-Pb/Pb ion probe|intrusion|||TAS|Yes|73317||Everard, J.L. (MRT)|24-MAY-11|Forsyth, S.|26-MAY-11|See Definition card.  Previously considered part of the Cape Wickham Granite ( e.g. Berry et al. 2005). Proposed publications: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). In prep. (2011?) The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. EVERARD J. L 2011. Geological Atlas 1:25000 series, Sheet  2355. Stokes. Mineral Resources Tasmania. EVERARD J. L. & Calver C. R.  2011. Geological Atlas 1:25000 series, Sheet 2256. Pearshape. Mineral Resources Tasmania. [Note to ASUD staff: use definition to update relationships when this name published.]|Grey, medium- to fine-grained, equigranular to very sparsely K-feldspar-porphyritic biotite monzogranite. Aplite veins, pegmatite veins and mafic enclaves up to 1 m across are locally present. Transitional to mylonite near the western contact.|acid intrusive rock|||Y||17-JAN-23
Lords Siltstone Member|10661|Lords Siltstone|10662|||Yes|Member, phase|Formal|Other new published name|Defined|Benjamin Limestone|1485|||Eastonian||||deposition|Eastonian|||||||TAS|No|30277|30277||||||Poorly outcropping, buff micaceous siltstone and fine-grained sandstone. Contains stictoporoid bryozoans and lesser brachiopods and trilobites.|siliciclastic sedimentary rock|||N||17-JAN-23
Lorinna Greywacke|10664|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Middle Cambrian|||||Middle Cambrian||||||||No|29626|||||||||||N||17-JAN-23
Lot Formation|24363|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Pandani Group|24450|||Precambrian||||deposition|Precambrian|||||||TAS|Yes|42227|42227|Calver C.R.|05-JUL-85|||Age is Late Precambrian. has also been referred to as  Lot Dolomite.|Dolomite with lesser, interbedded slate and phyllite.|carbonate sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Lots Wife Dolomite|10669|||||Yes|Formation, beds|Formal|Resvd name published|Mentioned|||||||||deposition|||||||||No|42227||||||?Of Weld River Group?|||||N||17-JAN-23
Lottah Granite|24364|Anchor Granite|411|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Lottah Suite|31603|Upper Devonian|377|2.4|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Upper Devonian|378|2|isotopic, U/Pb-Pb/Pb ion probe||||TAS|Yes|23718||MacKenzie D.E.|05-DEC-88|Tasmania SNSC|28-NOV-88|Also known as Anchor Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Intrudes Poimena pluton. Part of Blue Tier Batholith|S-type biotite alkali-feldspar granite - pink to cream equigranular to porphyritic with K-feldspar phenocrysts.|acid intrusive rock|||Y|S-type|17-JAN-23
Lottah Suite|31603|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Upper Devonian|||||Upper Devonian|377.8|2.4|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726|||||||S-type. Strongly peraluminous granites, strongly crystal fractionated.|acid intrusive rock|||Y|S-type|17-JAN-23
Lousy Bay Formation|79495|||||Yes|Formation, beds|Formal|Other new published name|Described|Ironbound Group|40963|||Cambrian||||deposition|Cambrian||||||||No|69874|||||||Interbedded sandstone, siltstone and conglomerate of proximal flysch type. The sandstone and conglomerate are polymict; clasts of quartzite, serpentinite, basalt, dolomite, chert, siltstone, sandstone and felsic volcanics.|siliciclastic sedimentary rock|||N||17-JAN-23
Low Rocky Point Granite|10688|Low Rocky Point granite|28693|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Eastern Quartz-Phyric Sequence|73128|||Drumian||||intrusion|Drumian||||||||No|41143|||||||Granite.|acid intrusive rock|||Y||17-JAN-23
Lucas Creek Volcanics|10839|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Cambrian||||eruption|Ediacaran||||||||No|41697||||||Not to be confused with Lucas Creek Granite in NSW.|Basalt lavas with minor interbedded basalt breccias, tuffs, and sedimentary rocks; some pillowed lavas.|basic igneous rock|||N||17-JAN-23
Lucy Formation|36133|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Timbs Group|26945|||Early Cambrian||||deposition|Neoproterozoic||||||||No|23460|||||||More than half this unit consists of interbanded metasedimentary rocks (albitic, chloritic and muscovitic schists); includes amphibolite. Disseminated magnetite causes a prominent aeromagnetic signature.|metasedimentary rock|||N||17-JAN-23
Lughrata Granite|10852|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Wybalenna Suite|31658|Middle Devonian||||intrusion|Lower Devonian||||||||No|42726||||||NOT a variation of Lughrata Sand - invalid name. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Luina Group|75980|Luina Beds|10856|||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Cambrian Series 2|513.6|5|inferred, intrusive relationship|deposition|Neoproterozoic|||inferred||||TAS|Yes|67654||Everard, J.L., Calver, C.R. (MRT)|04-MAY-11|Forsyth, S.|26-MAY-11|See Definition card. Luina Group constituent units: Deep Creek Volcanics (bottom), Halls Formation and Crescent Spur Sandstone (top) (Collins 1983). IN: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). 2011. The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. p111-113.|Large melange unit: allochthonous blocks hosted in a large volume of broken formation. Unfossiliferous feldspathic & lithicwacke sandstone, chert, mudstone and basalt, chert-rich pebble to granule conglomerate, laminated siltstone and lithicwacke.|fine grained siliciclastic rock|basic volcanic rock||N||17-JAN-23
Lune River Basalt|41607|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Jurassic||||eruption|Jurassic||||||||No|69878|||||||Basalt with minor mudstone; comagmatic with Tasmanian Dolerite|basic volcanic rock|||N||20-AUG-23
Lyell Schist|10877|||||Yes|Formation, beds|Formal|Unknown or process pending|Mentioned||||||||||||||||||No|30278||||||||metamorphic rock|||N||17-JAN-23
Lynch Creek Basalts|10883|Lynch Creek basalts|10887|||Yes|Formation, beds|Informal|Variation of published name|Described|Mount Read Volcanics|13057|||Late Cambrian||||eruption|Middle Cambrian||||||||No|37045||||||Of Yolande River Sequence according to 2003 digital geology of Tasmania. Probably should be Lynch Creek Basalt?|Arc-related mafic-intermediate rocks; 3x1km of lavas, breccias, volcaniclastics, possible intrusives, plus several smaller bodies.|intermediate volcanic rock|basic volcanic rock||N||17-JAN-23
Lynchford Member|29474|Queen River Member|29476|||Yes|Member, phase|Formal|Resvd name published|Defined|Comstock Formation|4408|||Late Cambrian||||deposition|Middle Cambrian||||||600|TAS|Yes|22551||White M.J. (after Corbett, 1979)|28-JUN-95|Calver, C.|21-JUL-95|Correlates with Lynchford Tuff of Corbett (1979) - Geol Surv Tas Bull 58. Unit in Tyndall Group.|Volcaniclastic lithic breccias, quartz-poor crystal +/- lithic volcaniclastic sandstones of andesitic composition, carbonate lenses (some with fossils), and laminated mudstone/sandstone units.|sedimentary rock|||N||17-JAN-23
Macquarie Harbour Formation|76018|Macquarie Harbour beds|76017|||Yes|Formation, beds|Formal|Variation of published name|Described|||||Eocene||||deposition|Eocene|||||10|27|TAS|No|66858||||||Type area of Scott (1960) retained. Contains fossils of extinct mangrove palm Nypa australis. The upper part is 22 m thick, divided into seven subenvironments. Fills an elongate rift basin which formed an arm of the sea, extending inland. See also Macquarie Harbour Beds of Johnston, R.M. (1888).|Clean basal sand unit overlain by more carbonaceous clay, mud and sand, generally fossiliferous (plant matter, dinoflagellates, palynomorphs).|siliciclastic sedimentary rock|||N||17-JAN-23
Macrae Mudstone|10966|MacRae Mudstone|10929|||Yes|Formation, beds|Formal|Variation of published name|Described|Golden Valley Group|27784|||Permian||||deposition|Permian|||||16.25|64.3||No|24547||||||See also McRae Formation. Uppermost unit of Golden Valley Group.|Siltstone and mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Magnet Complex|79496|||||Yes|Group, Suite|Informal|Other new published name|Described||||||||||||||||||No|69874||||||Name only used in figures & tables. Currency and status unclear.|Volcanics - boninite (high Mg andesite), low Ti tholeiite.|intermediate volcanic rock|||N||17-JAN-23
Magnet Creek Sandstone|11010|Magnet Creek Lithic Sandstone Formation|11009|||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||deposition|||||||||No|30293||||||Probably obsolete.||siliciclastic sedimentary rock|||N||17-JAN-23
Magog Subgroup|11014|Magog Group|11013|||Yes|Subgroup|Formal|Variation of published name|Mentioned||||||||||||||||||No|41954||||||Probably supersedes Magog Group.|||||N||17-JAN-23
Main Limestone|28709|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|34099||||||||carbonate sedimentary rock|||N||17-JAN-23
Mainwaring Group|11035|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Early Cambrian|||||Neoproterozoic||||||||No|41142||||||See also Mainwaring River Volcanics - unclear if one supersedes the other?. RefID 67654 (2011, p9) states this unit will shortly be formally defined following Corbett (1968), but as a subgroup of the Luina Group.   See also Mainwaring Group"".|Volcaniclastic lithicwacke and siltstone interbedded with mudstone and minor carbonate; 2 tholeiitic basalts separated by laminated mudstone and chert with central 100m laminated black and white chert ridge; phyllitic, strongly sheared.|basic volcanic rock|medium-coarse grained siliciclastic rock||N||17-JAN-23
Malbina Formation|11075|Woodbridge Glacial Formation|20483|||Yes|Formation, beds|Formal|Variation of published name|Described|Lower Parmeener Supergroup|10795|||Wordian||||deposition|Kungurian||||||180||No|66174||||||Replaced the name Woodbridge Glacial Formation in the Hobart Area in 1962. It was also known as Malbina Siltstone and Sandstone (Banks, M.R. 1962 - "The Malbina Siltstone and Sandstone": Royal Soc.of Tasmania, papers and procs., vol.96, p19).  Informally divided into 5 members, Malbina A, B, C, D, E. Members A and E are fossiliferous and often distinguished on correlation diagrams. Age: middle to late Lymingtonian.|Glaciomarine sediments, dominantly fossiliferous siltstone, poorly-sorted sandstone, and mudstone. Includes loadstones. Richly fossiliferous productid beds near top.|siliciclastic sedimentary rock|||N||17-JAN-23
Malclurites-Girvanella bed|28712|||||Yes|Bed|Formal|Variation of published name|Mentioned||||||||||||||||||No|41954|||||||||||N||17-JAN-23
Maria Island Granite|11298|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||listed as Maria Island (granite) N and Maria Island (granite) S .|S-type adamellite/granite containing biotite and minor amounts of garnet and/or cordierite.|acid intrusive rock|||Y|S-type|17-JAN-23
Marionoak Formation|79574|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Pleistocene||||deposition|Pliocene||||||||No|69880|||||||Organic-rich silts with normal magnetisation and pollen of several extinct taxa.|regolith|||N||17-JAN-23
Marra Formation|23769|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Kungurian||||deposition|Artinskian|||||||TAS|No|69854|39579|Geological Survey of Tasmania|03-AUG-79||||Sandstone and minor siltstone, with glauconitic sandstone in upper part.|siliciclastic sedimentary rock|||N||17-JAN-23
Marrawah Volcanics|11367|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||Neogene||||eruption|Cenozoic||||||||No|42552||||||||igneous volcanic rock|||N||17-JAN-23
Marshall Bay Coquina|11377|||||Yes|Formation, beds|Formal|Other new published name|Described|||||||||deposition|||||||||No|33358|||||||||||N||17-JAN-23
Martins Rise Granite|33470|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|63540||||||Formerly of Mussel Roe Suite.  Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |S-type biotite-(garnet/cordierite) monzogranite|acid intrusive rock|||Y||17-JAN-23
Mary Ann Bay Sandstone|11402|Mary Ann Bay sandstone|26726|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Quaternary||||deposition|Pleistocene||||||||No|31764||||||Age: <1.5Ma. In Central and Southern Tasmania.||siliciclastic sedimentary rock|||N||17-JAN-23
Mary Metamorphic Complex|70245|Mary Group|11403|||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Paleoproterozoic|1760||||Paleoproterozoic|1790|||||||No|63167||||||The term Metamorphic Complex was substituted for Group which was invalidly used by previous workers.|Quartzite, with local ripplemarks and cross-bedding; quartz-muscovite schist and phyllite derived from compositionally mature siliceous siltstone, with bedding obscured by cleavage.|metasedimentary rock|||N||17-JAN-23
Masseys Creek Group|11437|||||Yes|Group, Suite|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Sakmarian|||||Asselian|||||||TAS|No|30887|30889|||||Age: Tamarian (GSA Special Publication 15, p296)|||||N||17-JAN-23
Mathinna Supergroup|36812|Mathinna Group|11450|||Yes|Supergroup|Formal|Variation of published name|Defined|||||Lower Devonian||||deposition|Lower Ordovician||||||7000|TAS|Yes|23850|23850|Reed, A.||Forsyth, S.|03-JUL-01|Intruded by Long Point Granodiorite, Mount Paris Granite and Henbury Granite. Hosts gold mineralisation.|Clastic sedimentary successions including shale, mudstone, siltstone, sandstone and turbiditic sandstones.|siliciclastic sedimentary rock|||N||17-JAN-23
McIvor Creek Gabbro|11546|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||intrusion|||||||||No|41795||||||||basic intrusive rock|||Y||17-JAN-23
McIvor Hill Complex|30500|McIvor Hill Gabbro|11548|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Middle Cambrian|||||Early Cambrian|514|5||||||No|43191||||||McIvor Hill Gabbro probably superseded by the more recently used McIvor Hill Complex nomenclature?|Ophiolite sheet. Low Ti tholeiites and related gabbros. Serpentinised dunite, faulted against laminated and massive gabbro which is faulted against pillowed to massive flows of low-Ti basalt and boninite.|basic volcanic rock|basic intrusive rock||N||17-JAN-23
McLeod Creek Formation|11567|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tiger Range Group|18145|||Lower Devonian||||deposition|Silurian||||||400|TAS|No|35671|35671|||||In Geological Evolution of Tasmania (2014, p258 and p263) this unit is shown as the ?Lower Devonian McLeod Formation, the uppermost formation in the Tiger Range Group, which consists of interbedded mudstone and lesser sandstone; poorly fossiliferous.|Poorly fossiliferous fine-grained sandstone, shale and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
McRae Mudstone|27831|McRae Formation|11579|||Yes|Formation, beds|Formal|Variation of published name|Described|||||||||deposition|||||||||No|38200||||||See also Macrae Mudstone.||siliciclastic sedimentary rock|||N||17-JAN-23
Meander Mudstone|11596|Meander Formation|11594|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Poatina Group|15348|||Kungurian||||deposition|Artinskian||||||62||No|34047||||||Age: Lymingtonian. Part of the Poatina Group; formerly in the Woodbridge Group as Meander Formation.|Sandy siltstone, micaceous mudstone and thin sandstone beds.|siliciclastic sedimentary rock|||N||17-JAN-23
Medeas Cove Adamellite|11603|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|35826||||||See also the informally named Medeas Cove Granite.  Name inferred from Tasmanian granites map legend (2005)|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Memana Formation|11637|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Pliocene||||deposition|Lower Pleistocene||||||||No|33343||||||Age: 2.5-1.5Ma. In the NE Tasmania - Flinders Island area.|||||N||17-JAN-23
Mepunga Formation|11654|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Nirranda Group|14185|||Priabonian||||deposition|Lutetian||||||380||No|71437||||||In the Gambier Basin. Partly interfingers with Demons Bluff Formation.|Shallow to nearshore marine sandstone and shale.|regolith|||N||17-JAN-23
Meredith Granite|11660|Meredith granite|11662|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||Meredith Suite|40889|Mississippian|353|7|isotopic, K/Ar|intrusion|Upper Devonian|374|4|isotopic, U/Pb-Pb/Pb ICP-MS|||||No|73369||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Larger of two intrusive units forming Meredith Batholith.|I-type biotite granite. Composed of adamellite to alkali-feldspar granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Meredith Suite|40889|||||Yes|Group, Suite|Reserved|Reserved|Briefly described|||||Upper Devonian|||||Upper Devonian||||||||No|69876||McClenaghan M.P.|15-APR-04||||I-type moderately peraluminous to metaluminous granites with minor hornblende. Contains magnetite, sphene, allanite.|acid intrusive rock|||Y||17-JAN-23
Merrywood Seam|74346|||||Yes|Member, phase|Informal|Other new published name|Briefly described|Mount Nicholas Coal Measures|12974|||Upper Triassic|||||Upper Triassic||||||||No|63172|||||||||||N||17-JAN-23
Mersey Coal Measures|11732|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Lower Parmeener Supergroup|10795|||Artinskian||||deposition|Sakmarian||||||||No|24548||||||Northern Tasmania.||organic rich sedimentary rock|||N||17-JAN-23
Mersey Granite|81982|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Cambrian|||||Cambrian||||||||No|71730||||||Probably distinct unit from Mersey River Matamorphic Complex.|I-type granite.|acid intrusive rock|||N|I-type|17-JAN-23
Mersey River Metamorphic Complex|35838|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Middle Cambrian|498|7||metamorphism|Middle Cambrian|502|10||||||No|23326||||||Neoproterozoic units metamorphised in the Cambrian? Includes the Dove Schist (formerly Dove Group) and rocks formerly named Howell Group and Fisher Group. See also informal units Mersey River Metamorphics and Mersey Metamorphic Complex.|Pelitic schist dominates, with minor garnet-bearing rocks and amphibolite.|metasedimentary rock|||N||17-JAN-23
Mesoproterozoic amphibolite-facies metamorphics 76657|76657|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Mesoproterozoic|1000||||Mesoproterozoic|1200|||||||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 sedimentary rocks 76648|76648|||||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 to Neoproterozoic amphibolite-facies metamorphics 76646|76646|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neoproterozoic|||||Mesoproterozoic||||||||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
Mewstone Granite|73628|Mewstone granite|67912|||Yes|Formation, beds|Informal|Variation of reserved name|Briefly described|||||Cambrian||||magmatic crystallisation|Cambrian|496|5||||||No|63540||||||Isolated Mewstone Granite, is now (2016) known to be Cambrian. Radiometric age from S. Meffre (pers comm.). This means that contrary to the comment at REFID 61216, it cannot be part of the same granite mass as the Devonian Cox Bight Granite.|S-type, felsic granite; strongly fractionated, reduced. Medium, light grey, fine-grained muscovite granite, with sparse quartz and feldspar phenocrysts and miarolytic cavities; tourmaline in some samples.|acid intrusive rock|||Y|S-type|17-JAN-23
Middle Arm Group|11778|||||Yes|Group, Suite|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Kazanian|||||Kungurian|||||||TAS|No|30887|30889|||||Age: Lymingtonian (GSA Special Publication 15, 1989 p296)|Poorly fossiliferous pyritic mudstone.|fine grained siliciclastic rock|||N||17-JAN-23
Middle Cambrian mafic volcanics 76518|76518|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Middle Cambrian|500|||eruption|Middle Cambrian|505|||||||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
Miners Ridge Sandstone|11896|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Yolande River sequence|31359|||Furongian||||deposition|Middle Cambrian||||||||No|40070||||||Part of Dundas Group on 2003 digital geology of Tasmania. See also the informal Miners Ridge sandstone.|Well-bedded micaceous quartzwacke sandstone and minor mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Minnie Point Formation|23798|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Kungurian||||deposition|Artinskian||||||90|TAS|No|39234|41895|N.Farmer|07-SEP-77|||Part of Upper Marine Sequence.|Very variable, fossiliferous, marine siltstone and sandstone with many dropstones.|siliciclastic sedimentary rock|||N||17-JAN-23
Minnow Keratophyre|11938|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Tyndall Group|18756|||Middle Cambrian|499|5|||Early Cambrian|499|5||||||No|36788||||||Shown as part of Tyndall Group in list from 2003 digital map of Tasmania. See also the informal "Minnow keratophyre".|Generally massive quartz-feldspar porphyry with fine-grained matrix; and intrusives.|acid volcanic rock|acid intrusive rock||Y||17-JAN-23
Misery Conglomerate|11968|Misery Hill Conglomerate|11969|||Yes|Formation, beds|Formal|Other new published name|Fully described|Dundas Group|26529|||Lower Ordovician||||deposition|Furongian||||||160||No|31464||||||See also Misery Hill Sandstone. Probably the same unit.|Marine and flysch-like; interbedded pebble to boulder conglomerate, pebbly sandstone, sandstone and lithicwacke.|siliciclastic sedimentary rock|||N||17-JAN-23
Misery Hill Sandstone|71733|Misery Hill Conglomerate|11969|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Ibexian|489.6|||deposition|Payntonian|493.1|||||||No|69859||Jones, R. |24-JAN-03|||PREDICT MIGRATE 06/30/2006 - Seymour, D.B  Calver C.R. (1998), NGMA TASGO PROJECT. Geological Synthesis. Time & Space Diagram For Tasmania. Unclear from the legend of 2011 map whether this unit is a Formation in Denison or Owen Group. Of Wurawina Supergroup. Probably the same unit as Misery Conglomerate.|Shallow-marine sandstone, typically pink, cross-bedded to thin-bedded, with some siltstone and minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Mistletoe Sandstone|11976|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||||No|33711|||||||Thick bedded, usually poorly sorted, pebbly sandstone passing up into interbedded sandstone, siltstone and mudstone. Marine fossils abundant in places.|siliciclastic sedimentary rock|||N||17-JAN-23
Modder River Granite|12003|Modder River granite|23802|||Yes|Formation, beds|Informal|Resvd name published|Briefly described|||Musselroe Suite|40881|Mississippian|379|3||intrusion|Upper Devonian|379|3||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). One of the Furneaux Islands granites on Clarke Island.|S-type biotite-(garnet/cordierite) monzogranite|acid intrusive rock|||Y||17-JAN-23
Moina Sandstone|27837|||||Yes|Formation, beds|Formal|Variation of published name|Described|Gordon Group|7586|||Lower Ordovician||||deposition|Lower Ordovician||||||250||No|73369||||||Relationships from 97/28627, p11 after Jennings (1963), p56 - Middlesex explanatory report.  In Geological Evolution of Tasmania (2014, p241 and p243 Fig.5.2) a change from previous stratigraphic practice, the Gordon Group now includes a basal unit of sandstone (Pioneer Sandstone, Moina Formation and correlates) in the westen part of the Western Tasmania Terrane that was previously assigned to the underlying Owen or Denison Groups (Banks and Bailie 1989).|Sandstone, siltstone, basal diachronous, littoral to shallow marine fining upward succession of siliceous conglomerate and bioturbated quartz sandstone and siltstone, passing up conformably and gradationally into limestone.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Mole Creek Formation|12032|||||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Chudleigh Subgroup|4059|||Eastonian||||deposition|Eastonian|||||||TAS|No|41954|41954||||||Fossiliferous red to grey siltstone, black shale and minor limestone; various fauna listed.|fine grained siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Moncoeur Island Granite|12084|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Hogan Island Suite|31587|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Montana Volcanics|12125|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||eruption|||||||||No|31141|||||||Vesicular or amygdaloidal, altered spilitic basalts, pillowed in places and massive elsewhere; minor associated coarse- to fine-grained lithic tuff and breccia.|metamorphosed basic igneous rock|||N||17-JAN-23
Montgomery Basalt|78480|Mainwaring Group|11035|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Mainwaring Group|11035|||Cambrian||||eruption|Neoproterozoic||||||||No|67654||||||Formerly common usage was "Mainwaring Group" or "Mainwaring Basalts" of Corbett (1968) and Hall and Corbett (1968) - RefID 67654, p9, where this unit is "shortly" to be formally defined as part of Mainwaring Group (without quotation marks).||basic volcanic rock|||N||17-JAN-23
Moore Formation|23806|Moore formation|12283|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||||||||deposition|||||||||No|41993||Fitzsimons S.J.|17-MAR-89||||||||N||17-JAN-23
Moriarty Basalt|12334|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Chattian|25.9|||eruption|Chattian|25.9|||||55||No|34513|||||| Age: >24Ma.  In Central North Tasmania.||basic volcanic rock|||N||17-JAN-23
Motton Spilite|12433|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Early Cambrian|||||Ediacaran||||||500||No|31464||||||Dial Range Trough. Correlate of Crimson Creek Formation?  Adamsfield-Jubilee region.|Lenticular unit comprising pillowed and massive basaltic lavas with interbedded volcaniclastic sandstone, mudstone and breccia; includes tholeiitic basalt.|basic volcanic rock|||N||17-JAN-23
Mount Anne Group|24391|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Precambrian|||||Precambrian||||||1000|TAS|Yes|41908|42227|Calver C.R.|05-JUL-85|||Adamsfield-Jubilee region.|Supermature quartzarenite, quartz siltstone and phyllite. Laminated marine mudstone and siltstone; carbonate; shallow-marine, cross-bedded orthoquartzite.|metasedimentary siliciclastic rock|||N||17-JAN-23
Mount Bischoff Porphyry|79592|Bischoff porphyries|73648|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Carboniferous|338||isotopic, Rb/Sr|eruption|Devonian|346||isotopic, Rb/Sr|||||No|69876||||||An attempt to formalise unit no. 73648 (Bischoff porphyries)? or accidental capitalisation in figure?|Radiating I-type quartz porphyry dykes. Greisenisation of porphyries is extreme with formation of topaz, tourmaline, muscovite, cassiterite and pyrite pseudomorphing primary feldspar.|acid intrusive rock|||Y|I-type|17-JAN-23
Mount Bischoff beds|12522|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Proterozoic|||||Proterozoic||||||||No|33218|||||||||||N||17-JAN-23
Mount Black Volcanics|12525|||||Yes|Formation, beds|Formal|Variation of published name|Described|Northern Central Volcanic Complex|79500|||Late Cambrian|500|3||eruption|Wuliuan|506.8|.7||||2500||No|29914|||||||Volcanics including dacite; major lava-rich unit comprising feldspar-phyric and feldspar-hornblende-phyric dacitic to rhyolitic flows and lava domes, with relatively minor pumice breccias, sandstones and shard-rich siltstones.|acid volcanic rock|||N||17-JAN-23
Mount Bowes Formation|24392|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Pandani Group|24450|||Precambrian||||deposition|Precambrian||||||500|TAS|Yes|42227|42227|Calver C.R.|05-JUL-85||||||||N||17-JAN-23
Mount Cameron Granite|12567|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Bassian Batholith of Chappell et al. 1991. Blue Tier Batholith of McClenaghan 1989. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Mount Chappell Island Granite|69571|Chappell Islands Granite|3912|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Carboniferous||||intrusion|Upper Devonian||||||||No|63540||MRT|09-AUG-05|||MRT Tasmanian Granites map, May 2005.|I-type biotite-hornblende granodiorite|acid intrusive rock|||Y||17-JAN-23
Mount Charter Group|30225|||||Yes|Group, Suite|Formal|Other new published name|Fully described|Mount Read Volcanics|13057|||Middle Cambrian|||||Middle Cambrian||||||||No|43131|||||||Dominantly volcano-sedimentary sequences with some felsic to intermediate volcanic rocks.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Cripps Subgroup|30231|||||Yes|Subgroup|Formal|Other new published name|Described|Mount Charter Group|30225|||Middle Cambrian|||||Middle Cambrian||||||900||No|43131|||||||Siliciclastic conglomerate and siltstone; crystal-rich volcaniclastic sandstone with intercalated fossiliferous siltstone, minor pink welded ignimbrite and andesite lava; purple-weathering volcanolithic conglomerate and sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Elephant Sandstone|74348|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Permian||||deposition|Permian||||||||No|66174||||||Of McNeil (1965).  The term Mount Elephant Coal Horizon refers back to Voisey (1938)............." ....Voisey also split the basal rocks into two units. The Mount Elephant Coal Horizon thus appears to be equivalent to the Mount Elephant Sandstone rather than being a member" (per email from Steve Forsyth, July 2008).|Well-sorted, quartz-rich, cross-bedded sandstone, with interbedded conglomerate, carbonaceous siltstone and mudstone; local coal.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Field Siltstone Member|23818|Mount Field Siltstone|12709|||Yes|Member, phase|Formal|Variation of published name|Defined|Florentine Valley Formation|27081|||Lower Ordovician||||deposition|Lower Ordovician|||||||TAS|No|36379|36379|B.A.Stait, J.R.Laurie|19-NOV-79||||Fossiliferous siltstone, calcareous siltstone, siliceous cherty siltstone and fine siliceous sandstone; local chert bands interbedded with siltstone in the upper part of the unit.|fine grained siliciclastic rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Hamilton pumice breccias|73288|||||Yes|Formation, beds|Informal|Other new published name|Mentioned||||||||||||||||||No|63238||||||Informal name for the Kershaw Pumice Formation.|||||N||17-JAN-23
Mount Julia Member|29473|Anthony Member (TAS)|29477|||Yes|Member, phase|Formal|Resvd name published|Defined|Comstock Formation|4408|||Late Cambrian||||deposition|Middle Cambrian||||||750|TAS|Yes|22551||White M.J.|28-JUN-95|Calver, C.|21-JUL-95|Unit in Tyndall Group (Mount Read Volcanics).|Pink and green, quartz-feldspar crystal-rich volcaniclastic sandstone, graded volcaniclastic breccia-sandstone units, rare welded ignimbrite (mostly allochthonous blocks), local rhyolite lava.|siliciclastic sedimentary rock|acid volcanic rock||N||17-JAN-23
Mount Kerford Granite|12869|Mount Kerford granite|23822|||Yes|Formation, beds|Informal|Variation of reserved name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726|||||||S-type adamellite/granite containing biotite and minor amounts of garnet and/or cordierite. Garnet- and biotite-rich mafic layers and enclaves grade into normal granite.|acid intrusive rock|||Y||17-JAN-23
Mount Lyell Volcanics|40324|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||eruption|||||||||No|23949|||||||||||N||17-JAN-23
Mount Mackenzie Formation|12904|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Clytie Cove Group|23491|||||||deposition|||||||||No|37412|||||||Dominated by lithic greywacke, mudstone and siltstone with intercalations of lenticular fine-grained conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Nicholas Coal Measures|12974|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Upper Triassic||||deposition|Upper Triassic||||||||No|63172||||||||organic rich sedimentary rock|||N||17-JAN-23
Mount Paris Granite|13008|Mount Paris Alkali-Feldspar Granite|33480|||Yes|Formation, beds|Formal|Other new published name|Described|||Lottah Suite|31603|Upper Devonian|362|7||intrusion|Upper Devonian||||||||No|37797||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Intrudes the Mathinna Supergroup.|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y|S-type|17-JAN-23
Mount Pearson Granite|26768|Mount Pierson Adamellite|13032|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Poimena Suite|31626|Upper Devonian|363||isotopic, K/Ar|intrusion|Middle Devonian|383||isotopic, K/Ar|||||No|37797||||||Part of the Blue Tier Batholith. See also Mount Pearson Adamellite (preferred name in 1995, but reverted to Granite in 2005).|Very coarse-grained, mafic, unfractionated, reduced, I-type biotite monzogranite to granite with abundant K-feldspar megacrysts.|acid intrusive rock|||Y|I-type|17-JAN-23
Mount Pelion Coal Measures|30017|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Permian||||deposition|Permian||||||||No|24548||||||||organic rich sedimentary rock|||N||17-JAN-23
Mount Read Volcanics|13057|||||Yes|Supergroup|Formal|Variation of published name|Fully described|||||Furongian||||eruption|Miaolingian||||||1500||No|44012||||||Centrally dominated by the Central Volcanic Complex and the Tyndall Group; also includes Comstock Formation at top of unit.  Age: ca505-500Ma (Black et al 1997). Highly mineralised in parts.|Complex of medium-K calc-alkaline lavas, pyroclastics, tuffs and shallow intrusives. Sedimentary and felsic rocks.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Mount Read Volcanics and correlates|37483|||||Yes|Supergroup|Informal|Variation of published name|Mentioned|||||Cambrian||||eruption|Cambrian||||||||No|41698||||||Informal grouping to be used for Tasmania 1:1million geological map, National Maps Project. Includes 4 unnamed subdivisions with map symbols -Cds, -Cdsq, -Cf, -Cb. See these subunits for lithology.|||||N||17-JAN-23
Mount Rugby Conglomerate|26277|||||Yes|Formation, beds|Formal|Other new published name|Defined|Clytie Cove Group|23491|||Cambrian||||deposition|Proterozoic|||||||TAS|No|37412|37412|P.R.Williams|15-SEP-77||||Conglomerate with subordinate intercalations of breccia and interbedded, graded, lithic greywacke, siltstone and mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Mount Stewart Ultramafic Complex|13112|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Early Cambrian|||||Early Cambrian|514|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|41795||||||See also Mount Stewart Complex.|Ophiolite sheet. Ultramafics - layered cumulates of dunite and less common harzburgite, cut by common orthopyroxenite dykes and veins; volcanics - boninite (high Mg andesite), low Ti tholeiite.|ultramafic igneous rock|metamorphosed ultramafic rock||N||17-JAN-23
Mount Stronach Granite|13116|Mount Stronach Alkali-Feldspar Granite|33476|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Russells Road Suite|31541|Upper Devonian||||intrusion|Lower Devonian|392.2|1.9|isotopic, U/Pb-Pb/Pb ion probe|magmatic crystallisation||||No|42726||||||See also Mount Stronach Alkali-Feldspar Granite. Part of the Scottsdale Batholith.  Formal name not intended by Chappell et al (1991), but name more recently published by Black et al (2005)|I-type biotite monzogranite.  Alkali-feldspar granite pluton - light pink, equigran., coarse to fine-gr. quartz, K-feldspar, plagioclase(close to pure albite) and Fe-rich biotite.|acid intrusive rock|||Y|I-type|17-JAN-23
Mount Stronach Suite|33477|||||Yes|Group, Suite|Formal|Other new published name|Mentioned|||||Middle Devonian|||||Middle Devonian||||||||No|||||||Of McClenaghan 1989.|||||Y||17-JAN-23
Mount William Granite|26776|Mount William Alkali-Feldspar Granite|33482|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Boobyalla Suite|31666|Devonian||||intrusion|Middle Devonian||||||||No|41818||||||"Mount William" name used on Lachlan granites map (1991) and Tasmanian granites map (2005).  "Mount William Granite" only inferred as a unit name by these publications.  Part of the Eddystone Batholith of McClenaghan 1989. Formerly of Babel Island Suite.|S-type granite, felsic, strongly fractionated, reduced: an alkali-feldspar body - equigranular, pink, medium-grained biotite-muscovite granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Mount Zeehan Conglomerate|28821|||||Yes|Formation, beds|Formal|Variation of published name|Described|||||Ordovician||||deposition|Late Cambrian||||||450||No|31648||||||Of Blissett (1962).|Thick accumulations of pebble to boulder conglomerate with sandstone interbeds; shallow-marine to non-marine; probably alluvial fan deposits.|siliciclastic sedimentary rock|||N||17-JAN-23
Mountain Lodge Member|13268|||||Yes|Member, phase|Formal|Other new published name|Defined|Springs Sandstone|17220|||Scythian||||deposition|Scythian||||||37.5||No|63868|63868|||||Age by correlation with Ross Sandstone.|Main rock type is a well-sorted, medium- to coarse-grained quartz sandstone, cross-bedded and with beds generally more than 75cm thick but with some units more thinly bedded.||||N||17-JAN-23
Munro Creek Slate and Quartzite|28832|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Late Cambrian|||||Late Cambrian||||||||No|41795||||||Redesignated from "Rosebery Group" as marine Owen Group - together with Stitt Quartzite, Westcott dolomitic beds, Salisbury fuchsitic conglomerate and the Natone Volcanics|Interbedded micaceous quartzwacke sandstone, siltstone, grey-black mudstone and minor siliceous conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Murchison Granite|28833|||||Yes|Formation, beds|Informal|Variation of published name|Described|Eastern Quartz-Phyric Sequence|73128|||Late Cambrian|501|5.7|isotopic, Ar/Ar|intrusion|Middle Cambrian|524|15||||||No|34298||||||Same as Murchison River Granite? Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Name implied from map legend. Intrudes Murchison Volcanics.|Granite, partly granodioritic in composition. Widespread chlorite- and K-feldspar alteration of volcanic rocks, associated with magnetite-hematite veining and minor Cu mineralisation, appear related to this intrusion.|acid intrusive rock|||Y|I-type|17-JAN-23
Murchison Volcanics|13503|||||Yes|Formation, beds|Formal|Variation of published name|Described|Eastern Quartz-Phyric Sequence|73128|||Drumian||||eruption|Drumian||||||||No|40736||||||Same as Murchison Gorge Volcanics? Intruded by the Murchison Granite (GSA Spec. Pub. 15).|Mostly quartz-feldspar-phyric, including lavas, breccias, intrusives, pyroclastics + volcaniclastic rocks.|acid volcanic rock|||N||17-JAN-23
Murrays Road Greywacke|30230|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Southwell Subgroup|30229|||Middle Cambrian|||||Middle Cambrian||||||||No|43131|||||||Metamorphic-derived pebbly sandstone and shale.|siliciclastic sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Mussel Formation|13610|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Wangerrip Group|19406|||Eocene||||deposition|Thanetian||||||||No|41185||||||Same as Mussel Roe nomenclature?|||||N||17-JAN-23
Nala Sand|13691|||||Yes|Formation, beds|Formal|Other new published name|Described|||||||||deposition|||||||||No|33358|||||||||||N||17-JAN-23
Nancy Formation|36132|||||Yes|Formation, beds|Formal|Other new published name|Defined|Timbs Group|26945|||Early Cambrian||||deposition|Neoproterozoic||||||||No|23460|||||||Mainly amphibolite, typically as massive boudins within mafic schist; includes metadolerite showing fragmental (possibly tuffaceous) and amygdaloidal textures.|high grade metamorphic rock|||N||17-JAN-23
Naracoopa Formation|78323|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Ediacaran||||deposition|Cryogenian|750||isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|63674||||||Eastern King Island. Detrital zircon population gives age of 1000 - 750 Ma.|Thick (6-7 km?) succession of relatively unmetamorphosed shale, siltstone and fine-grained muscovitic quartz sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Narrawaturk Marl|13904|Narrawaturk Formation|13902|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Nirranda Group|14185|||Rupelian||||deposition|Bartonian||||||131||No|71437||||||Of Bock & Glenie (1965). Incorporates Browns Creek Clay, Castle Cove Limestone and Glen Aire Clay - local names best regarded as members.  (see GSV report 103, 1995). In the Gambier Basin, Otway Basin. This unit has been split into upper and lower parts in the Port Campbell Embayment area.|Calcareous mudstone, minor thin calcarenite beds: locally carbonaceous and burrowed, locally abundant glauconite pellets and polished quartz sand, foraminifers, bryozoans, brachiopods and molluscs; open marine (below storm wave base) deposits.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Narrawaturk Marl, Lower|80022|Narrawaturk Marl|13904|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Nirranda Group|14185|||Priabonian|||||Bartonian||||||||No|69297||||||Port Campbell Embayment, Otway Basin.||carbonate sedimentary rock|||N||17-JAN-23
Narrawaturk Marl, Upper|80023|Narrawaturk Marl|13904|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Rupelian|||||Rupelian||||||||No|69297||||||Port Campbell Embayment, Otway Basin.|||||N||17-JAN-23
Narrows Formation|73429|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||deposition|||||||||No|63168|||||||||||N||17-JAN-23
Nassau Formation|13925|Nassau Siltstone|13926|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Lower Parmeener Supergroup|10795|||Artinskian||||deposition|Sakmarian||||||||No|30150||||||Age: Early Permian. Name in use in GSA Spec.Pub. 15 - Geol. and Mineral Resources of Tasmania (1989). See Nassau Siltstone.|Marine calcareous siltstone. Calcareous fossiliferous (abundant brachiopods and bryozoans), marine grey-black siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Natone Volcanics|13936|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Late Cambrian||||eruption|Late Cambrian||||||||No|34298||||||Redesignated from "Rosebery Group" to marine Owen Group from fossil evidence and lithology, together with Stitt Quartzite, Westcott dolomitic beds, Munro Slate and Quartzite and Salisbury fuchsitic conglomerate.|Crystal-rich felsic volcaniclastic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Needles Quartzite|13958|||||Yes|Formation, beds|Formal|Variation of published name|Described|Clark Group|4102|||Neoproterozoic|||||Mesoproterozoic|1395|23|isotopic, U/Pb-Pb/Pb ion probe|maximum depositional age||||No|41793||||||Maximum depositional age from detrital zircon: 1393+/-23Ma. Located in NE corner of Pedder Quadrangle.|Supermature quartzarenite. Abundant cross-bedding; thin-bedded, ripple-marked facies commmon.|siliciclastic sedimentary rock|||N||17-JAN-23
Neoproterozoic granites 76669|76669|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Tonian|750|||intrusion|Tonian|780|||||||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
Neoproterozoic mafic volcanics 76665|76665|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Ediacaran|550|||eruption|Ediacaran|630|||||||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
Neoproterozoic sedimentary rocks 76671|76671|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Ediacaran||||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 76674|76674|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cryogenian|680|||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
New River beds|74391|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|63170||||||Reserved as New River Lagoon (Burrett C.F., Laurie J., Stait B., 1990). See also New River Beds.|Consist of bryozoan-algal-coralline grainstones.|carbonate sedimentary rock|||N||17-JAN-23
New Town Coal Measures|14066|New Town Formation|39917|||Yes|Formation, beds|Formal|Variation of published name|Mentioned|Upper Parmeener Supergroup|18944|||Upper Triassic||||deposition|Upper Triassic||||||||No|48846||||||See also Lexicon.||organic rich sedimentary rock|||N||17-JAN-23
Newton Creek Sandstone|14116|Newton Creek Sandstone Member|28865|||Yes|Formation, beds|Formal|Variation of published name|Described|Owen Group|34165|||Furongian|||inferred, biostratigraphic correlation|deposition|Furongian|||inferred, biostratigraphic correlation|||||No|35791||||||Queenstown area. Unit reduced to member rank for some years, then reinstated at formation rank. See also Newton Creek Sandstone Member.|Contains fossils of post-Idamean, pre-Payntonian age. Turbidite sequence of interbedded sandstone and siltstone, with lesser conglomerate and minor limestone; trilobites and brachiopods.|siliciclastic sedimentary rock|||N||17-JAN-23
Nirranda Group|14185|||||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Rupelian|29|||deposition|Lutetian|45||||||VIC|No|71437|31036|||||Introduced by Bock & Glenie (1965). Once interpeted as Nirranda Sub-group of the Heytesbury Gp due to difficulties in distinguishing one from the other in western part of basin; also known as Hanson Plain Sand in Heytesbury Group by some authors (see GSV 103). In Gambier Basin in SA also.|Fine-grained marginal marine/littoral sediments; marl.|carbonate sedimentary rock|||N||17-JAN-23
Noddy Creek Volcanics|29417|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Mount Read Volcanics|13057|||Late Cambrian|502|4.4|isotopic, U/Pb-Pb/Pb ion probe|eruption|Middle Cambrian|502|4.4|isotopic, U/Pb-Pb/Pb ion probe|||||No|638||||||Variation on Noddy Creek Lamprophyre?|Comprises andesitic to dacitic lava, volcaniclastic and epiclastic sandstone and autobreccia, and associated sedimentary rocks in its southern continuation.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
North Lyell chert|40513|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||||||deposition|||||||||No|23948|||||||A large cap-like cherty silica body enclosed within sericite-chlorite-pyrite schists.|non-carbonate chemical or biochemical sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
North Pinnacles Rhyolite|79499|Pinnacles rhyolite|73290|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Middle Cambrian||||eruption|Middle Cambrian||||||||No|69874||||||Variation on the informal Pinnacles rhyolite (unit no. 73290). Only used on figure. Formal name intended, or accidental?||acid volcanic rock|||N||17-JAN-23
Northeast Island Granite|26811|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Deal Island Suite|31570|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726|||||| Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Northern Central Volcanic Complex|79500|Central Volcanic Complex|3868|||Yes|Subgroup|Informal|Variation of published name|Described|Central Volcanic Complex|3868|||Middle Cambrian||||eruption|Middle Cambrian||||||||No|69874||||||With the Southern Central Volcanic Complex, represents an informal subdivision of Central Volcanic Complex (unit no. 3868).|Volcanic-rich sequence; felsic to intermediate, generally feldspar-phyric rocks, major pumice units; unfossiliferous.|acid volcanic rock|||N||17-JAN-23
Nullawarre Greensand|14374|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Sherbrook Group|16826|||Campanian||||deposition|Santonian||||||130||No|71437||||||Previously Nullawarre Greensand Member (Bock & Glenie, 1965) as a member of Paaratte Formation; elevated to formation status by Williamson et al (1987). See also Nullawarre Formation.|Light greenish-grey, fine- to coarse-gr. sandstone.|siliciclastic sedimentary rock|||N||16-OCT-23
Oceana Limestone|14489|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|40136||||||||carbonate sedimentary rock|||N||17-JAN-23
Oonah Formation|14603|Oonah Quartzite and Slate|28893|||Yes|Formation, beds|Formal|Other new published name|Fully described|Arthur Metamorphic Complex|647|||Cryogenian|690|10||deposition|Tonian|||isotopic, K/Ar||3000|5000||No|31141||||||Zeehan district. Correlated with Burnie Formation of nthn Tas - the name Oonah Formation is preferred over Burnie Formation (AJES 51/6 p888). Max Age: 708 (+/-) 6 Ma. Intruded by Cooee Dolerite. See also Montana Melaphyre"" and Montana Melaphyre. Three successions long regarded as correlates (e.g. Spry 1962a,1964; Gee 1967a; Turner 1989a; Reed et al.2002; Black et al. 2004) are Oonah Formation (western Tas; Hills and Carey 1949; Spry 1958a; Brown 1986), Burnie Formation (northern Tas; Spry 1957a), and Badger Head Group (Badger Head Inlier; Gee and Legge 1979; Reed et al 2002). To simplify nomenclature, we apply the first-used term, Oonah Formation, to all these successions (refer to p53, Chapter 3 Proterozoic Tasmania IN Geological Evolution of Tasmania 2014). Radiometric ages probably from intruding units.|Quartzwacke continent-derived turbidites sequences (mudstone and sandstone) interbedded with minor pillow basalt. Hosts iron sulphide-cassiterite replacement deposits, tin-tungsten skarns and Ag-Pb-Zn veins associated with Heemskirk Granite.|siliciclastic sedimentary rock|basic volcanic rock||N||13-SEP-23
Oonah Formation and correlates|37489|||||Yes|Formation, beds|Informal|Variation of published name|Not recorded|||||Neoproterozoic||||deposition|Neoproterozoic||||||||No|||||||Informal grouping used for Surface Geology of Australia 1:1million geological dataset.  Includes Burnie and Oonah Formations and correlates.|Quartzwacke turbidite, dolomitic in same areas; some basalt; includes Burnie Formation.|siliciclastic sedimentary rock|||N||17-JAN-23
Opossum Boat Harbour Grit|27869|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Lower Pleistocene|||||Lower Pleistocene||||||||No|33358|||||||||||N||17-JAN-23
Ordovician sedimentary rocks 76682|76682|||||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
Osmund Syncline-Stony Creek Granite|73282|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||||||intrusion|||||||||No|63240||||||Referred to as Osmund Syncline-Stony Creek Granite body - felsic volcano-sedimentary rocks designated as part of the Western Volcano-Sedimentary Sequence.||acid intrusive rock|||Y||17-JAN-23
Ossa Formation|25370|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Upper Parmeener Supergroup|18944|||Scythian||||deposition|Scythian||||||||No|43072||||||Age by correlation with Ross Sandstone.|Well-sorted, glistening quartz sandstone in fining-upward cycles, often with basal mud-pellet conglomerate or quartz granules; cycles are massive or tabular, cross-bedded or planar-laminated, scour fills.|siliciclastic sedimentary rock|||N||17-JAN-23
Otway Group|14685|||||Yes|Group, Suite|Formal|Variation of published name|Fully described|||||Albian||||deposition|Tithonian||||||3500||No|48581|50154|||||Of Medwell (1954) after Otway beds of Seward (1904). See also Lexicon. SJ54-12, SJ55-9.  Probably not in TAS [DPJUN03]. Raised to rank of supergroup following introduction of Crayfish Group (Kopsen and Scholefield 1990) but this caused discontinuity of nomenclature - considered to have limited usefulness - so group status retained. See comments in Refid 66244. Strzelecki Group considered to be a synonym & proposed to be abandoned in VandenBerg et al (2006) and VandenBerg (2009), but retained by Morand (2010).|Fluvial volcaniclastic arkosic sandstone, mudstone, minor black coal, sandstone, conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Otway Megasequence|41021|||||Yes|Clan|Sequence stratigraphy|Sequence strat published|Described|||||Phimopollenites pannosus|97.5||biozone||upper Foraminisporites wonthaggiensis||||||||No|14235||||||Age:Early Cretaceous (Barremian - Albian).|A stacked succession of volcaniclastic, blocky, fluvial channel sands with thin, coaly overbank-floodplain shales.|siliciclastic sedimentary rock|||N||17-JAN-23
Overflow Creek Formation|14696|||||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Chudleigh Subgroup|4059|||Eastonian||||deposition|Eastonian|||||||TAS|No|41954|41954|||||Reserved as Overflow Creek Member (Banks M.R., Burrett C.F., 1977).|Mainly unfossiliferous dolomitic micrite and dolostone. Microbially-laminated, mudcracked limestone, birdseye limestone, bioturbated micrite, calcarenite and dolostone thinly interbedded; calcite pseudomorphs after evaporites.|carbonate sedimentary rock|||N||17-JAN-23
Owen Group|34165|Owen Conglomerate|27530|||Yes|Group, Suite|Formal|Variation of published name|Fully described|Wurawina Supergroup|24587|||Lower Ordovician|||||Late Cambrian||||||1500||No|44135||||||Probably intended to replace Owen Conglomerate? Equivalent to Denison Group --  "There has been a trend on the 1:25 000 geology maps to use Owen Group for the rocks in the west and north west of Tasmania and to restrict Denison Group to the rocks that extend from the Denison Range area (roughly southern central Tasmania). This trend is not so evident in the broader literature" (per email S.Forsyth, 11/12/08).|Thick sequence of siliciclastic conglomerate and sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Paaratte Formation|14730|Paaratte Formation""|14729|||Yes|Formation, beds|Formal|Variation of published name|Defined|Sherbrook Group|16826|||Maastrichtian|||inferred, biostratigraphic correlation|deposition|Santonian|||inferred, biostratigraphic correlation||160|1987||No|48581|48581|||||Of McQueen (1961). Defined 1964. Has previously included Belfast Mudstone, Nullawarre Greensand and Timboon Sand as members but each is preferred as an independent unit in Eastern Otway Basin (GSV Report 103) - 1995.|Carbonaceous, interbedded and laminated fine-grained sandstone, siltstone and mudstone, with thin beds of coarse gravel.|siliciclastic sedimentary rock|||N||17-JAN-23
Palana Granite|14781|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Wybalenna Suite|31658|Middle Devonian||||intrusion|Lower Devonian||||||||No|42726||||||Invalid name - Palana Limestone already used in TAS.  Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Palana Limestone|14782|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Pleistocene||||deposition|Lower Pleistocene||||||||No|33358||||||||carbonate sedimentary rock|||N||17-JAN-23
Palmer Sandstone|27531|Palmer Formation|14803|||Yes|Formation, beds|Formal|Variation of published name|Described|Bogan Gap Group|2080|||Late Permian||||deposition|Late Permian||||||5||No|34012||||||See also Palmer Formation.|A dirty, fairly even-grained sandstone, sometimes with grit-sized fragments and occasional pebbles.|siliciclastic sedimentary rock|||N||17-JAN-23
Panama Group|36814|||||Yes|Group, Suite|Formal|Other new published name|Redefined|Mathinna Supergroup|36812|||Middle Devonian|||inferred, overlying unit||Late Silurian|||inferred, geological correlation||4500|6000|TAS|Yes|23850|67493|||Forsyth, S.|03-JUL-03|See Definition Card. Redefined 2010. Intruded by Middle Devonian granitoids.Constituent unit Bellingham Formation replaced by 3 units, Lone Star Siltstone, Retreat Formation and Yarrow Creek Mudstone. [D.Seymour JUL-2009]|Classical turbidites, comprising upwardly fining mudstone to predominantly fine- to medium-grained, rarely coarse-grained, quartzose sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Pandani Group|24450|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Precambrian|||||Precambrian|||||||TAS|Yes|41908|42227|Calver C.R.|05-JUL-85|||Faulted against the Mount Anne Group.|Consists of dolomite with subordinate phyllite and limestone; slate and mudstone with intercalated dolomite, quartzarenite, red siltstone and mudstone.|carbonate sedimentary rock|metasedimentary siliciclastic rock||N||17-JAN-23
Paradise amphibolite|79057|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Timbs Group|26945||||||||||||||||No|69873||||||REE plots.|||||N||17-JAN-23
Parangana Till|14864|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||Pleistocene|||||Pleistocene||||||||No|30524|||||||||||N||17-JAN-23
Parmeener Supergroup|14900|||||Yes|Supergroup|Formal|Variation of published name|Fully described|||||Upper Triassic||||deposition|Pennsylvanian|||||500|1800||No|30156||||||See also the widely used invalid names - Lower Parmeener Supergroup and Upper Parmeener Supergroup, and variations of these.Traditionally, the Parmeener Supergroup has been informally subdivided into a lower marine sequence (Late Carboniferous-Sakmarian), a lower freshwater sequence (Liffey and Faulkner Groups; Late Sakmarian to Early Artinskian), an upper marine sequence (Artinskian-Guadalupian) [all part of the Lower Parmeener Supergroup] and an upper freshwater sequence (Upper Parmeener Supergroup; Late Permian-late Triassic).|Undivided sedimentary rocks, including clastic sediments with interbedded coal and alkali basalt; glaciomarine sequences of mudstone, sandstone, minor limestone, coal measures, Tasmanite oil shale and basal tillite.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Parmeener Supergroup, Lower|73112|Parmeener Supergroup|14900|||Yes|Group, Suite|Informal|Variation of published name|Fully described|Parmeener Supergroup|14900|||Permian|||||Pennsylvanian||||||||No|35268||||||Informal subdivision. Needs a new name. Comprises more than 7 units commencing with Wynyard and Truro Tillite at the base. Includes Wynyard Tillite; Woody Island, Bundella, Deep Bay, Malbina, Abels Bay Formations; Tasmanite Oil Shale; Liffey, Cascades Groups.|Glacigene and shallow-water glaciomarine sequences of mudstone, sandstone, minor limestone, coal measures, Tasmanite oil shale, and basal tillite, diamictites, rhythmic claystones.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Parmeener Supergroup, Upper|68522|Parmeener Supergroup|14900|||Yes|Group, Suite|Informal|Variation of published name|Fully described|Parmeener Supergroup|14900|||Upper Triassic|214|1||eruption|Capitanian||||||||No|41696||||||Informal name. Needs a new name. Includes Cygnet Coal Measures; Jackey Shale; Clog Tom Sandstone; Ross, Ossa, Knocklofty, Cluan, Tiers, Brady Formations; Gould Conglomerate.|Carbonaceous sandstone and coal (Late Permian); quartzose sandstone (Early Triassic); lithic and quartz sandstone and basaltic volcanics (Middle Triassic); sandstone, coal and volcaniclastics (Late Triassic).|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
Parmeener Supergroup, lower|81142|Parmeener Supergroup, Lower|73112|||Yes|Group, Suite|Informal|Variation of published name|Briefly described|Parmeener Supergroup|14900|||Artinskian|||||Pennsylvanian||||||||No|70194||||||Traditionally, the Parmeener Supergroup has been informally subdivided into a lower marine sequence (Late Carboniferous-Sakmarian), a lower freshwater sequence (Liffey and Faulkner Groups; Late Sakmarian to Early Artinskian), an upper marine sequence (Artinskian-Guadalupian) - Lower Parmeener Supergroup; and an upper freshwater sequence (Upper Parmeener Supergroup; Late Permian-late Triassic).|||||N||17-JAN-23
Parmeener Supergroup, upper|81143|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Upper Triassic|||||Late Permian||||||||No|70194||||||Traditionally, the Parmeener Supergroup has been informally subdivided into a lower marine sequence (Late Carboniferous-Sakmarian), a lower freshwater sequence (Liffey and Faulkner Groups; Late Sakmarian to Early Artinskian), an upper marine sequence (Artinskian-Guadalupian) [all part of the Lower Parmeener Supergroup] and an upper freshwater sequence (Upper Parmeener Supergroup; Late Permian-late Triassic).|||||N||17-JAN-23
Passage Island Granite|26834|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Royal George Suite|40845|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Briefly described.  Included in Mussel Roe Suite of McClenaghan 1989. Same body as Kent Bay (McClenaghan, MRT, May 2004). Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |S-type granite.|acid intrusive rock|||Y||17-JAN-23
Patriarchs Adamellite|40882|||||Yes|Formation, beds|Reserved|Variation of published name|Reserved|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|||Reid E.J., McClenaghan M.P.|15-APR-04|||Central part Flinders Island. See also misspelt The Patriachs Granite. Prob. same as Patriarch Inlet Granite. Age/suite derived from 2005 1:5K Tasmanian Granites Map + CD (HG, O. R.). "Adamellite" no longer in use but takes precedence until formalisation.|I-type biotite granite|acid intrusive rock|||Y||17-JAN-23
Pats River Granite|26835|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Wybalenna Suite|31658|Middle Devonian|||inferred|intrusion|Lower Devonian|||inferred|||||No|42726||||||Flinders Island. See also Pats River Granodiorite.|I-type biotite-hornblende granodiorite|acid intrusive rock|||Y|I-type|17-JAN-23
Pebble Point Formation|14994|Pebble Point Beds|14992|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Wangerrip Group|19406|||Selandian||||deposition|Danian||||||158|VIC|No|48581|31036|||||After Pebble Point Beds of Baker 1943. Previously referred to as Bahgallah Formation in South Australia. In the Gambier Basin. See also Lexicon. SJ54-12.  Transgressively overlaps the Otway Group. Age variably recorded as anywhere from Cretaceous to Eocene, so presumably not well defined.|Quartz sand, minor clay: micaceous, fine-grained, friable, generally massive; minor planar cross-bedding; minor gravel, minor volcanic and metamorphic lithic cobbles and pebbles; near shore, shallow marine deposits.|regolith|||N||17-JAN-23
Pedder River Siltstone|40960|||||Yes|Formation, beds|Formal|Other new published name|Described|Rocky Cape Group|27555|||Neoproterozoic||||deposition|Mesoproterozoic|1442|26|isotopic, U/Pb-Pb/Pb ICP-MS|maximum depositional age||||No|73006||||||Name used but not defined in: Bell, D.H. 1972. 1971-1972 Annual Report, north-western Tasmania, joint venture exploration.  Australian Consolidated Industries Ltd. (MRT TCR No. 72-876). Minimum depositional age constrained at 1346+\-12 Ma to 1315+\-23 Ma. U-Pb detrital zircon analysis yielded a maximum depositional age of 1442+\-28 Ma (Halpin et al., 2014).|Interbedded to finely interlaminated mid-dark grey siltstone and pale quartz siltstone-fine quartz sandstone, with common erosional structures, grading and cross lamination.|siliciclastic sedimentary rock|||N||17-JAN-23
Pegarah Amphibolite|41158|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||McClenaghan, M.|01-JUN-04|||Central King Island,  description not yet published in association with name.|Amphibolite.|high grade metamorphic rock|||N||17-JAN-23
Penguin Islet Granite|40887|||||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Interview Suite|31593|Devonian||||intrusion|Devonian||||||||No|63540||Everard J.L., Calver C.R., Pemberton J., etc, McClenaghan M.|15-APR-04|||Small island south of Three Hummock Island off NW Tasmania. Used in unpublished Tasmanian Geological Survey Record 1997/03 'Geology of the islands of southwestern Bass Strait'.   To be published by M. McClenaghan, Mineral Resources Tasmania.|Medium-grained, porphyritic, leucocratic, biotite-muscovite-bearing granite, with tabular K-feldspar phenocrysts locally aligned to define a crude phenocryst foliation.|acid intrusive rock|||Y|S-type|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
Permian sedimentary rocks 76693|76693|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Lopingian|252|||deposition|Guadalupian|270|||||||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
Peter Limestone|15108|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Artinskian||||deposition|Artinskian||||||||No|34099|||||||Pale grey, coarse-grained crinoidal limestone with subordinate micrite and shale.|carbonate sedimentary rock|||N||17-JAN-23
Petibela Sand|15121|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Upper Pleistocene||||deposition|Upper Pleistocene||||||||No|33358|||||||||||N||17-JAN-23
Petrifection Bay Coquina|15131|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Cenozoic||||deposition|Cenozoic||||||||No|33358||||||Spelling may be erroneous and perhaps should be Petrifaction?|||||N||17-JAN-23
Piccaninny Creek Granodiorite|33483|Piccaninny Granodiorite|33484|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Gardens Suite|31503|Upper Devonian|384||isotopic, Rb/Sr|intrusion|Middle Devonian|390||isotopic, Rb/Sr|||||No|69876||||||See also Piccaninny Creek Adamellite etc.  Name inferred to be amended by "Tasmanian granites and associated mineralisation (preliminary version)" map legend from Piccaninny Granodiorite.|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Pieman Suite|31623|||||Yes|Group, Suite|Formal|Other new published name|Briefly described||||||||||||||||||No|42726|||||||||||Y||17-JAN-23
Pioneer Sandstone (TAS)|29303|Pioneer beds|28929|||Yes|Formation, beds|Invalid|Variation of published name|Described|Gordon Group|7586|||Middle Ordovician||||deposition|Middle Ordovician||||||||No|37046||||||Invalid name. NT use has priority. Probably refers to Pioneer beds. This unit was previously considered the uppermost unit of the Owen Group, but was reassigned to the Gordon Group in 2001.  In Geological Evolution of Tasmania (2014, p241 and p243 Fig.5.2) a change from previous stratigraphic practice, the Gordon Group now includes a basal unit of sandstone (Pioneer Sandstone, Moina Formation and correlates) in the westen part of the Western Tasmania Terrane that was previously assigned to the underlying Owen or Denison Groups (Banks and Bailie 1989). Note: distinguished from Pioneer Sandstone of NT by additional suffix (TAS).|Pebble conglomerate and sandstone. Shallow-marine sandstone-mudstone +/- conglomerate +/- limestone; Ordovician fossils and trace fossils in places.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Pipestem Sandstone|15288|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|40127||||||May also be written as "Pipestem Sandstone".||siliciclastic sedimentary rock|||N||17-JAN-23
Pleasant Creek Formation|15319|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|41143|||||||Bedded epiclastic rocks, shales, mud-flow breccias, conglomerates and rhyolitic epiclastics.|siliciclastic sedimentary rock|||N||17-JAN-23
Poatina Group|15348|Woodbridge Group|20486|||Yes|Group, Suite|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Permian|||||Permian|||||||TAS|No|34012|34047||||||Mudstone, sandy siltstone, sandstone and pebbly sandstone. Variably fossiliferous.|siliciclastic sedimentary rock|||N||17-JAN-23
Poets Road Member|15353|Poets Road member|15356|||Yes|Member, phase|Formal|Other new published name|Briefly described|Knocklofty Formation|9681|||||||deposition|||||||35||No|35280|||||||Interbedded siltstone and sandstone. Lutite-rich; contains Tetrapod trace and body fossils.|siliciclastic sedimentary rock|||N||17-JAN-23
Poimena Granite|15359|Poimena Adamellite|15358|||Yes|Formation, beds|Formal|Variation of published name|Described|||Poimena Suite|31626|Upper Devonian|377|5|isotopic, Rb/Sr|intrusion|Middle Devonian|386.8|2.5|isotopic, U/Pb-Pb/Pb ion probe|||||No|37797||||||See also Poimena Adamellite. Part of Blue Tier Batholith (Poimena Pluton). Adamellite was preferred name in 1995. Reverted to Granite in 2005.|Felsic, I-type, unfractionated biotite monzogranite; commonly contains minor muscovite.|acid intrusive rock|||Y|I-type|17-JAN-23
Poimena Suite|31626|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Middle Devonian|||||Middle Devonian|383.8|2.9|isotopic, U/Pb|||||No|42726|||||||Contains peraluminous granites.|acid intrusive rock|||Y|S-type|17-JAN-23
Point Hibbs Formation|15370|Point Hibbs Limestone|15372|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Spero Bay Group|27571|||Pragian||||deposition|Lochkovian|||||||TAS|No|41317|41317|||||Redefinition of Point Hibbs Limestone, 1988. Point Hibbs Melange Belt (McClenaghan and Findlay 1993) is discussed in Tasmanian GS Record 1995/01 (p23 and 24).|||||N||17-JAN-23
Point Vivian Formation|23911|||||Yes|Formation, beds|Formal|Resvd name published|Fully described|Wurawina Supergroup|24587|||Late Cambrian||||deposition|Middle Cambrian||||||||No|38201||R.F.Berry|15-SEP-81||||Interbedded conglomerate, sandstone and mudstone. Clasts dominated by dolomite and quartzite (from Proterozoic rocks to the N).|siliciclastic sedimentary rock|||N||17-JAN-23
Pontoon Hill Siltstone Member|23917|Pontoon Hill Siltstone|15427|||Yes|Member, phase|Formal|Variation of published name|Defined|Florentine Valley Formation|27081|||Lower Ordovician||||deposition|Lower Ordovician|||||||TAS|No|36379|36379|B.A.Stait, J.R.Laurie|19-NOV-79||||Yellow to grey siltstone and calcareous siltstone, with prominent nodular texture in most places. Sandstones in the lower part of the unit are locally strongly bioturbated, with intercalated bands of glauconitic shale.|fine grained siliciclastic rock|||N||17-JAN-23
Porcupine Creek Granodiorite|75567|Porcupine Creek Granite|15451|||Yes|Formation, beds|Reserved|Variation of published name|Briefly described|||Diddleum Suite|33464|Middle Devonian||||intrusion|Middle Devonian||||||||No|66575||Everard, J.L. (MRT) after Chappell et al (1991)|18-DEC-09|||To replace Porcupine Creek Granite.  Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Part of Scottsdale Batholith.|I-type biotite-hornblende granodiorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Port Cygnet Complex|15465|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Lower Cretaceous|||||Lower Cretaceous||||||||No|40811||||||Age previously listed as Middle Miocene. Source of date unknown. Also referred to as Port Cygnet Alkaline Complex and Cygnet Alkaline Complex (95-99 Ma K/Ar).|||||N||17-JAN-23
Port Davey Metamorphic Complex|35836|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Cambrian|505|3|chemical U-Th-Pb||Cambrian|511|5||||||No|23326|||||||Consists of alternating layers of quartz- and plagioclase-rich rocks with varying amounts of garnet and mica; garnet and garnet amphibolite lenses occur throughout the complex.|metasedimentary siliciclastic rock|||N||17-JAN-23
Port Slate|15482|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Detention Subgroup|28502|||Neoproterozoic|||||Mesoproterozoic||||||||No|30877||||||Of Spry (1957).|||||N||17-JAN-23
Port Sorell Formation|15483|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||Ediacaran||||deposition|Cryogenian|||inferred, biostratigraphic correlation|||||No|42877||||||Age:<777 +/- 7 Ma (Henson, 2002) reported in 2014.|Complex faulted association of sedimentary and volcanic rocks - including shale, quartz sandstone, tholeiitic basalt, volcaniclastic sandstone and conglomerate, dolostone, chert and cataclasite.|siliciclastic sedimentary rock|basic volcanic rock||N||17-JAN-23
Precipitous Bluff beds|15546|Precipitous Bluff Beds|15545|||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|41954|||||||Thin-bedded siltstone, calcareous shale and minor biosparite and biomicrite.||||N||17-JAN-23
Preolenna Coal Measures|15549|||||Yes|Formation, beds|Formal|Variation of published name|Described|Lower Parmeener Supergroup|10795|||Artinskian||||deposition|Sakmarian||||||||No|30819||||||Age: Bernacchian Stage of Rekunian Series. Northern Tasmania.|Well-sorted, quartz-rich, cross-bedded sandstone, with interbedded conglomerate, carbonaceous siltstone and mudstone; local coal.|siliciclastic sedimentary rock|||N||17-JAN-23
Prime Seal Island Granite|15582|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Musselroe Suite|40881|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Formal name not intended. Included in Boobyalla Suite of McClenaghan 1989. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Primrose Pyroclastics|15583|Primrose pyroclastics|15585|||Yes|Formation, beds|Formal|Other new published name|Described||||||||||||||||||No|29914|||||||||||N||17-JAN-23
Prion Beach beds|74392|Prion Beach Beds|24463|||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|63170||||||See also Prion Beach Beds.|Thinly bedded argillaceous micrite; fossils are included.||||N||17-JAN-23
Professor Range sequence|79502|Professor Range Sequence|73292|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Dundas Group|26529|||Furongian|||||Furongian||||||||No|69874|||||||||||N||17-JAN-23
Prospect Creek Mudstone|15617|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||||No|41696|||||||Poorly sorted grey mudstone, siltstone and rare sandstone, unfossiliferous except for rare forams. One notable bed of pebbly sandstone ~1m thick.|siliciclastic sedimentary rock|||N||17-JAN-23
Pulbeena Limestone|15651|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Pleistocene||||deposition|Pleistocene||||||||No|69849|||||||Limestone of freshwater origin; concealed by derived soil.|carbonate sedimentary rock|||N||17-JAN-23
Pumphouse Lava|15653|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||intrusion|||||||||No|39892|||||||||||N||17-JAN-23
Puncheon Point Granite|15657|Puncheon Point granite|23924|||Yes|Formation, beds|Informal|Resvd name published|Briefly described|||Lady Barron Suite|31601|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite-garnet monzogranite|acid intrusive rock|||Y||17-JAN-23
Purcells Plain Lherzolite|79503|||||Yes|Formation, beds|Formal|Other new published name|Described|Heazlewood River Complex|8232|||Middle Cambrian|||||Early Cambrian||||||||No|69874|||||||Lowest rocks are dunite to troctolite; orthopyroxene increases east. Plagioclase lherzolite is the most distinctive rock type. Strongly serpentinised and plagioclase is strongly saussuritised. Layering of 10mm-200m is present.|ultramafic intrusive rock|||Y||17-JAN-23
Purrar Point Formation|83499|Purrar Point Member|79504|||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|73489||||||Unclear if this is a deliberate name and rank change, or accidental misspelling.|||||N||17-JAN-23
Purrar Point Member|79504|||||Yes|Member, phase|Formal|Other new published name|Briefly described|Lousy Bay Formation|79495|||Cambrian||||deposition|Cambrian||||||||No|69874||||||See also Purrar Point Formation.|A conglomerate wedge, interpreted as a submarine channel deposit.|siliciclastic sedimentary rock|||N||17-JAN-23
Pyengana Granodiorite|15697|Pyengana granodiorite|15698|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Gardens Suite|31503|Upper Devonian||||intrusion|Upper Devonian||||||||No|37797||||||Briefly described in GSA Special Publication 15 p257. See also the informal Pyengana Granite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |I-type biotite-hornblende granodiorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Pyengana Suite|31505|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||Gardens Supersuite|31502||||||||||||||No|42726|||||||||||Y||17-JAN-23
Pyramid Formation|28946|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|41993|||||||||||N||17-JAN-23
Quamby Mudstone|15719|Quamby Formation|25424|||Yes|Formation, beds|Formal|Variation of published name|Redefined|Golden Valley Group|27784|||Cisuralian||||deposition|Cisuralian||||||96||No|24548|24547|||||See also Quamby Formation, Quamby Group. See also Lexicon. Probably Sakmarian in age. Base rests on Precambrian quartzites. Part of the Lower Parmeener Supergroup.|Dark grey, poorly-bedded mudstone to siltstone containing a few erratics; pyritic and contains glendonites; rarely fossiliferous; interbedded lenses of dark blue-grey, massive limestone, locally abundantly fossiliferous.|fine grained siliciclastic rock|||N||17-JAN-23
Que River Shale|15739|Que River shale|15741|||Yes|Formation, beds|Formal|Variation of published name|Described|Mount Charter Group|30225|||Drumian|499.3|.9|inferred, intrusive relationship|deposition|Drumian|||inferred, biostratigraphic correlation|||100||No|43245||||||See also Que River Beds.|Black carbonaceous pyritic shale and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Que-Hellyer Volcanics|30220|||||Yes|Subgroup|Formal|Other new published name|Described|Mount Charter Group|30225|||Middle Cambrian|500.4|1|isotopic, U/Pb-Pb/Pb ion probe|eruption|Middle Cambrian|540|30||||1000||No|43245||||||Invalid name. Marine sequence.|Submarine volcanics, intermediate to mafic, pillowed and brecciated within some composite stratovolcano-type andesites; unfossiliferous.|intermediate volcanic rock|basic volcanic rock||N||17-JAN-23
Queenstown Limestone|15751|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Ordovician||||deposition|Ordovician||||||||No|40127||||||||carbonate sedimentary rock|||N||17-JAN-23
Radfords Creek Group|15788|Radford Creek Group|15786|||Yes|Group, Suite|Formal|Variation of published name|Described|Mount Read Volcanics|13057|||Guzhangian|||inferred, biostratigraphic correlation||Drumian|||inferred, biostratigraphic correlation|||||No|31464||||||Replaces the misspelt Radford Creek Group.|Mudstone, lithic wacke and minor felsic volcanic rocks, with basalt-rich and chert-rich conglomerate at the base. Fossiliferous units.|siliciclastic sedimentary rock|||N||17-JAN-23
Ragged Basin Complex|23933|||||Yes|Group, Suite|Formal|Resvd name published|Described|||||Early Cambrian|||||Early Cambrian||||||||No|41562||N.J.Turner|02-APR-86||||Greywacke, mudstone, chert, minor basaltic rocks. Sandstone from feldspathic to lithic wacke. Coarse detrital muscovite, biotite, garnet. Chert bands to ~100m often form ridges. Red-brown mudstone associated with mafic volcanics.|sedimentary rock|basic volcanic rock||N||17-JAN-23
Railton Limestone|15805|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|40127||||||Age is probably Ordovician.||carbonate sedimentary rock|||N||17-JAN-23
Rayner Sandstone|15903|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Cascades Group|3730|||Sakmarian||||deposition|Sakmarian||||||2||No|66174|||||||Tough, indurated and poorly sorted sandstone. Fossiliferous.|siliciclastic sedimentary rock|||N||17-JAN-23
Rays Hills Arkose|15905|||||Yes|Formation, beds|Formal|Other new published name|Mentioned||||||||||||||||||No|66172||||||Age - probably Permian?|||||N||17-JAN-23
Red Point Metamorphic Complex|79201|||||Yes|Formation, beds|Reserved|Reserved|Reserved||||||||||||||||||No|||Mulder, J., (UTas)|27-JUL-15|||Map Sheet: South Cape 8210? Nearest Town: Melaleuca. briefdescription: A fault-bound package of medium-grade (garnet-bearing) metamorphic rocks including pelitic schist, quartzite, and amphibolite and low-grade metamorphic rocks including quartzite and phyllite.wheretobepublished: a paper to be submitted to the Australian Journal of Earth Sciences in 2015 titled: "The structure and metamorphism of the Red Point Metamorphic Complex - a newly discovered high-pressure metamorphic complex from the south coast of Tasmania." By Jacob A Mulder, Ron F Berry, and Robert J Scott.|A fault-bound package of medium-grade (garnet-bearing) metamorphic rocks including pelitic schist, quartzite, and amphibolite and low-grade metamorphic rocks including quartzite and phyllite.||||Y||17-JAN-23
Red Reef Cliff Sandstone|27888|||||Yes|Formation, beds|Formal|Unknown or process pending|Described|Spero Bay Group|27571|||Lower Devonian||||deposition|Lower Devonian||||||70||No|43547||||||Possibly Early Devonian.  See also Red Reef Cliff Siltstone.|Unfossiliferous. Redbeds, predominantly fine-grained sandstone with subordinate coarser red sandstone and conglomerate, fining upwards.|siliciclastic sedimentary rock|||N||17-JAN-23
Red Rock Member|15964|||||Yes|Member, phase|Formal|Other new published name|Described|Crimson Creek Formation|4898|||Proterozoic||||deposition|Proterozoic||||||32||No|32409||||||Mine sequence, Renison Bell tin mine. Part of Crimson Creek Formation.|Local unit of cherty iron formation, lithicwacke, conglomerate, dolostone and diamictite.|siliciclastic sedimentary rock|||N||17-JAN-23
Reeds Conglomerate|15995|||||Yes|Formation, beds|Formal|Other new published name|Redefined|Denison Group|5370|||Lower Ordovician||||deposition|Late Cambrian||||||1560|TAS|No|30274|30275|||||Within the Wurawina Supergroup.  An "Upper Sandstone Member" recognised by Corbett (1975).|Fluvial to shallow-marine conglomerate and sandstone, composed largely of quartzitic Tyennan detritus.|siliciclastic sedimentary rock|||N||17-JAN-23
Regency Formation|23937|Regency formation|16003|||Yes|Formation, beds|Formal|Resvd name published|Fully described|||||Pleistocene||||deposition|Pleistocene||||||||No|41993||Fitzsimons S.J.|17-MAR-89||||||||N||17-JAN-23
Reids Creek Siltstone|33768|||||Yes|Formation, beds|Informal|Resvd name published|Mentioned|||||||||deposition|||||||||No|61395||Hills P.|29-OCT-99|||Badger Head area.||siliciclastic sedimentary rock|||N||17-JAN-23
Relapse Formation|74349|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|63172|||||||||||N||17-JAN-23
Renison Bell Formation|16022|Renison Bell Shale|16026|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Success Creek Group|17488|||Cambrian||||deposition|Neoproterozoic||||||1000||No|41795||||||See also Renison Bell Member. The two names are used interchangeably in Geology and Mineral Resources of Tasmania, GSA Spec. Pub. 15 (1989) - both stated be of the Success Creek Group.  Includes the 'red rock' member (Brown 1986).|Interlaminated siltstone and shale with minor sandstone and conglomerate; local unit of cherty iron formation, lithicwacke, conglomerate, dolostone and diamictite.|non-carbonate chemical or biochemical sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Renison Complex|33459|Renison Bell Complex|25439|||Yes|Formation, beds|Formal|Variation of published name|Described|||Pieman Suite|31623|Mississippian||||intrusion|Upper Devonian||||||||No|44105||||||See also Pine Hill Granite, Renison Granite. A composite granitoid stock which intrudes both the Success Creek Group and Crimson Creek Formation. It represents the tip of the subsurface granite ridge connecting Heemskirk Batholith and Granite Tor Granite.|Medium to coarse-grained, equigranular and porphyritic, with a groundmass of quartz, K-feldspar, plagioclase and biotite.|igneous intrusive rock|||N||17-JAN-23
Renison Suite|79595|||||Yes|Group, Suite|Informal|Variation of published name|Briefly described||||||||||||||||||No|69876|||||||I-type moderately peraluminous to metaluminous alkali-feldspar granite with very strong crystal fractionation. Contains magnetite, sphene, allanite, ilmenite.|acid intrusive rock|||Y||17-JAN-23
Reservoir Andesite|30390|Reservoir andesite|16044|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||||||eruption|||||||||No|43131||||||||intermediate volcanic rock|||N||17-JAN-23
Retreat Formation|75364|Bellingham Formation|1426|||Yes|Formation, beds|Formal|Resvd name published|Defined|Panama Group|36814|||Wenlock|||inferred, overlying unit|deposition|Wenlock|||inferred, underlying unit|||2000|TAS|Yes|67503|67493|Seymour, D. (MRT)|08-JUL-09|Forsyth, S.|07-SEP-10|Retreat 1:25 000 map sheet area (part of 8315). Interbedded turbiditic medium- to very fine-grained sandstone and subordinate siltstone-mudstone.This is one of three proposed new Formations replacing the interval previously occupied by the Bellingham Formation. It is proposed to retire usage of the Bellingham Formation name. To be published = Mineral Resources Tasmania publications arising from TasExplore Project (late 2009 - 2010). Possible AJES paper(s) - 2010?|Interbedded turbiditic medium- to very fine-grained sandstone and subordinate siltstone-mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Riana Siltstone|79505|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Middle Cambrian||||deposition|Middle Cambrian||||||||No|69874||||||Dial Range area. Likely to be a basal Owen Group unit.||siliciclastic sedimentary rock|||N||17-JAN-23
Richea Siltstone|27227|||||Yes|Formation, beds|Formal|Other new published name|Defined|Tiger Range Group|18145|||Wenlock||||deposition|Llandovery||||||220|TAS|No|35671|35671||||||Fossiliferous siltstone; contains Late Llandovery fauna and Wenlock fossils.|siliciclastic sedimentary rock|||N||17-JAN-23
Ring Road Dolerite|40975|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||intrusion|||||||||No|||||||Used as an informal name (though refered to as a metadolerite) in: Corbett, K.D., Pemberton, J., Vicary, M.J. 1991.  Mt Read Volcanics Project Geological Report 4: ...|Tholeiitic dolerite (Mt Charter area; upper Leven River).|basic intrusive rock|||Y||17-JAN-23
Risdon Sandstone|16114|Risdon sandstone|27551|||Yes|Formation, beds|Formal|Other new published name|Fully described|Ferntree Group|6611|||Kazanian||||deposition|Kungurian||||||8||No|24548||||||Part  of Upper Marine Sequence. Part of the Lower Parmeener Supergroup. See also the informal Risdon Formation. Hobart Explan Notes and map show Risdon Sandstone as part of Ferntree Group - its former affiliation. Equivalent to Garcia Formation in the Central Plateau area.|Coarse-grained, well-washed, cross-bedded quartz sandstone; conglomeratic. Glaciomarine.|siliciclastic sedimentary rock|||N||17-JAN-23
Riveaux Formation|40966|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|||||||C.R. Calver, S.M. Forsyth & J.L Everard (in press): Explanatory Notes for Maydena, Skeleton, Nevada, Weld and Picton 1:25000 Digital Geological Mapsheets.|Lithicwacke and conglomerate, with ultramafic detritus in places.||||N||17-JAN-23
Rivernook Formation|16129|||||Yes|Formation, beds|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|42863||||||Same as Rivernook Member of Dilwyn Fm, Vic?|||||N||17-JAN-23
Robbins Creek Formation|74933|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Grassy Group|7717|||Cryogenian||||deposition|Cryogenian||||||100|TAS|Yes|68241||Calver, C.R (GSTAS).|08-DEC-08|Forsyth, S.|08-DEC-08|PROPOSED PUBLICATION: Calver, C.R. , 2008 (Compiler). Digital Geological Atlas 1:25,000 series, Sheet 2456. Grassy. Mineral Resources Tasmania.|Laminated chloritic siltstone and black shale, with minor impersistent, conformable, altered mafic lavas; minor thin beds of impure limestone near the top; thin (3m) basal conglomerate of subrounded cobbles and pebbles of Fraser Formation mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Roberts Sandstone|16173|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||deposition|||||||||No|31461||||||NOT same unit as Roberts Sandstone Member in Victoria.||siliciclastic sedimentary rock|||N||17-JAN-23
Rocky Boat Harbour Ultramafic Complex|40957|||||Yes|Group, Suite|Formal|Other new published name|Described||||||||||||||||||No|69874||||||Brown, A.V. 1989.  Eo-Cambrian-Cambrian. In: Burret, C.F., Martin, E.L. (ed.): Geology and Mineral Resources of Tasmania.  Geological Society of Australia Inc. Spec. Publ. 15.  See map p70.|Ultramafics-?layered dunite and harzburgite, variably but mostly strongly serpentinised. Associated with chromian spinel, magnetite grains, trace pentlandite and other sulfides.|metamorphosed ultramafic rock|||N||17-JAN-23
Rocky Cape Group|27555|||||Yes|Group, Suite|Formal|Variation of published name|Defined|||||Cryogenian|750||inferred, isotopic correlation|deposition|Mesoproterozoic|1442|28|isotopic, U/Pb-Pb/Pb ICP-MS||5700|10000||No|73369||||||Maximum depositional age from detrital zircon 1010+/-45 Ma (in Jacob Quartzite) at the top of the Group, but likely age~1000-750Ma range. (Black et al, 2004). Age poorly constrained by age of dolerite dykes intrusions into Rocky Cape Group units (Cowrie Siltstone K/Ar 600+/-8Ma), and biostratigraphy and isotope chemostratigraphy of overlying Black River Dolomite (~750-650 Ma). More recent studies (Halpin et al., 2014) give U-Pb zircon max dep age of 1442+/-28 Ma and authigenic monazite age of 1315+/-23 Ma for basal Pedder River Siltstone.|Sandstone-siltstone shelf sequence.Quartz arenite-pelite association - predominantly shallow marine quartz siltstone, shale, cross-bedded quartzarenite and minor carbonate.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Rocky Cape Group and correlates|37488|||||Yes|Group, Suite|Informal|Variation of published name|Not recorded|||||Cryogenian|750||inferred, isotopic correlation|deposition|Stenian|1000||inferred, isotopic correlation|deposition||||No|||||||Maximum depositional age from detrital zircon 1010+/-45Ma, but likely age ~1000-750Ma range. (Black et al, 2004).  This informal grouping  is used for the Australian 1:1million scale surface geology map.|Interbedded black, dark grey and green, commonly pyritic, laminated siltstone and mudstone, with rare sandstone and mud-pellet conglomerate. Some laminated grey siltstone, mudstone and dolomite, orthoquartzite and conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Rodondo Island Granite|28970|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Promontory Suite|31627|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Roland Conglomerate|16260|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Owen Group|34165|||Lower Ordovician||||deposition|Late Cambrian||||||300||No|29626||||||In the Fossey MountainsTrough. Stated to be placed in the Owen Group (per email S.Forsyth, 11/12/08). Owen Group and Denison Group are equivalents.|Comprises reddish to white, well-sorted, highly siliceous conglomerate with associated quartz sandstone or quartzite.|siliciclastic sedimentary rock|||N||17-JAN-23
Rooks River Granite|23945|Rooks River granite|16305|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|36374||D.J.Cocker|24-OCT-74|||Card. In press according to DL1980. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). |I-type granite|acid intrusive rock|||Y||17-JAN-23
Rosebery Shale|79506|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Undillan||||deposition|Undillan||||||||No|69874|||||||Volcaniclastic sandstone and shale.|fine grained siliciclastic rock|||N||17-JAN-23
Ross Complex|16359|Ross complex|16365|||Yes|Group, Suite|Formal|Unknown or process pending|Described||||||||||||||||||No|38014||||||See also Ross Group. In TAS?|||||N||17-JAN-23
Ross Sandstone|27558|Ross Formation|16360|||Yes|Formation, beds|Formal|Variation of published name|Described|Upper Parmeener Supergroup|18944|||Scythian||||deposition|Scythian||||||200||No|43890||||||Of Bonwick (1870). Uncertain which takes precedence - Ross Formation or Ross Sandstone?|Predominantly medium-grained quartz sandstone; impure.|siliciclastic sedimentary rock|||N||17-JAN-23
Rowallan Formation|16393|||||Yes|Formation, beds|Formal|Unknown or process pending|Mentioned|||||Pleistocene||||deposition|Pleistocene||||||||No|30524||||||See also Rowallan Till. Unclear which takes precedence?|||||N||17-JAN-23
Rowella basalt|79580|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Eocene|47|||eruption|Eocene||||||100||No|69879|||||||Basalt|basic volcanic rock|||N||17-JAN-23
Royal George Granite|16409|||||Yes|Formation, beds|Formal|Other new published name|Described|||Royal George Suite|40845|Upper Devonian|377.1|1.8|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Middle Devonian||||||||No|31174||||||Of B.W.Chapell's 1991 Babel Island Suite.|Biotite alkali-feldspar granite - equigranular, coarse-grained with minor bodies of microgranite and granite porphyry. Strongly crystal-fractionated; strongly peraluminous.|acid intrusive rock|||Y|S-type|17-JAN-23
Royal George Suite|40845|||||Yes|Group, Suite|Informal|Resvd name published|Briefly described|||||Carboniferous|||||Devonian||||||||No|61216||McClenaghan M.|15-APR-04||||S-type. Strongly peraluminous granites, strongly crystal fractionated.|acid intrusive rock|||Y||17-JAN-23
Rugby Conglomerate|16433|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||deposition|||||||||No|29875||||||Not to be confused with Rugby nomenclature of other states.|||||N||17-JAN-23
Rupert beds|73353|Rupert Beds|16457|||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|63167||||||Of Spry (1964; Gee et al 1969) and originally included in the Balfour slates and sandstones by Ward (1911a).|Sequence of quartzite, black mudstone, siltstone and conglomerate with rare dolomite.||||N||17-JAN-23
Rushy Lagoon Granite|81978|Musselroe Granite|73637|||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||Devonian|||inferred||Devonian|||inferred|||||No|71730||||||Includes Musselroe Granite of Groves et al. 1977)|S-type granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Rushy Lagoon Member|28982|||||Yes|Member, phase|Formal|Other new published name|Fully described|Waterhouse Formation|19582|||Quaternary||||deposition|Quaternary||||||||No|35466|||||||||||N||17-JAN-23
Russells Road Granite|16459|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Russells Road Suite|31541|Mississippian|358||isotopic, Rb/Sr|intrusion|Upper Devonian|372||isotopic, Rb/Sr|||||No|42726||||||Bassian Batholith of Chappell et al 1991. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Part of the Scottsdale Batholith.|I-type biotite monzogranite - coarse to very coarse-grained equigranular to sparsely porphyritic, largely adamellite with megacrysts of K-feldspar.|acid intrusive rock|||Y|I-type|17-JAN-23
Russells Road Suite|31541|||||Yes|Group, Suite|Formal|Variation of published name|Described|||Tulendeena Supersuite|31538|Devonian|||||Middle Devonian||||||||No|42726|||||||Per-aluminous and more heterogeneous than Diddleum rocks, ranges from granodiorite to alkali-feldspar granite.|acid intrusive rock|||Y|I-type|17-JAN-23
Saint Clair Till|16526|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned||||||||||||||||||No|30524||||||Also informally known as Saint Clair surface.|||||N||17-JAN-23
Saint Valentines Granite|73651|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Housetop Suite|31588|Devonian||||intrusion|Devonian||||||||No|63540||||||Presented as the compound name - Housetop/ St Valentines (granite) on Tasmanian granites and associated mineralisation (2005) map legend.|I-type granite, felsic; strongly fractionated, oxidised.|acid intrusive rock|||Y|I-type|17-JAN-23
Salisbury Hill Formation|33788|||||Yes|Formation, beds|Formal|Resvd name published|Described|Denison Group|5370|||Lower Ordovician||||deposition|Lower Ordovician||||||210||No|23850||Hills P.|29-OCT-99|||This unit needs clarification. There appears to be a desire for it to include the Cabbage Tree Conglomerate, without the latter being given the rank of Member. Until that happens, or the units are redefined [please], they must be treated as separate Formations in the Denison Group.Beaconsfield area.|Shallow marine sandstone-mudstone +/- conglomerate +/- limestone sequences; typically grey. Ordovician fossils and trace fossils in places.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Salmon River Siltstone|40956|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Togari Group|23016|||Middle Cambrian|||biozone|deposition|Early Cambrian|||biozone|||350|TAS|No|63250||||||Everard, J.L., Seymour, D.B., Reed, A.R., McClenaghan, M.P., Green, D.C., Calver, C.R., Brown, A.V.  2007.  Regional geology of the southern Smithton Synclinorium: Explanatory Report for the Roger, Sumac and Dempster 1:25,000 digital geological map.|Pale-weathering, thin bedded, laminated quartz siltstone with subordinate interbedded fissile shale.  Commonly silicified.|fine grained siliciclastic rock|||N||17-JAN-23
Sandblow Granite|74932|Grassy Granite|7714|||Yes|Formation, beds|Formal|Resvd name published|Defined|||Sandblow Suite|79596|Mississippian|350.7|2.3|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Mississippian|350.8|1.7|isotopic, U/Pb-Pb/Pb ion probe||||TAS|Yes|73314||Calver, C (GSTAS)|08-DEC-08|Forsyth, S.|08-DEC-08|Proposed name change from 'Grassy Granite'. Previously of Grassy Suite. PROPOSED PUBLICATION: Calver, C.R. , 2008 (Compiler). Digital Geological Atlas 1:25,000 series, Sheet 2456. Grassy. Mineral Resources Tasmania. Black, L.P.; J.L. Everard, M. P. McClenaghan, R. J. Korsch, A.-M. Fioretti, A. V. Brown  and C. Foudoulis  (in preparation): Inherited zircon and isotopic evidence for the origin of Tasmanian Devonian-Carboniferous granites. Australian Journal of Earth Science.|An ovoid pluton of monzogranite, and several small outliers of microgranite. A relatively oxidised, magnetite-bearing, unfractionated, hornblende-biotite monzogranite. I-type.|acid intrusive rock|||Y|I-type|17-JAN-23
Sandblow Suite|79596|Grassy Suite|31585|||Yes|Group, Suite|Informal|Variation of published name|Described|||||Mississippian||||deposition|Mississippian||||||||No|69876||||||Probably replaces Grassy Suite.|I-type moderately peraluminous to metaluminous granite with minor hornblende. Contains magnetite, sphene, allanite.|acid intrusive rock|||Y||17-JAN-23
Sandfly Coal Measures|16590|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||deposition|||||||||No|41895||||||||organic rich sedimentary rock|||N||17-JAN-23
Sandy Cape Granite|16610|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Interview Suite|31593|Upper Devonian|362.4|1.9|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Upper Devonian|362.4|1.9|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726||||||Used 1990, in Sawka W.N., et al, 'Geochem. of highly fractionated I- and S-type granites --', Geol.Soc.Am.Spec.Pap.246, p163,164. Age +suite derived from 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Prevously thought to be part of Interview Granite. In 2016, said to be part of Sandy Cape Suite, along with Interview Granit eand Three Hummock Island Granite.|S-type biotite-muscovite alkali-feldspar granite. Composition ranges from adamellite to alkali-feldspar granite. Several intrusive phases dominated by coarse-grained, equigranular, muscovite leucogranite.|acid intrusive rock|||Y|S-type|17-JAN-23
Sandy Cape Suite|81984|||||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||||Devonian|||inferred||Devonian|||inferred|||||No|71730||||||May replace Interview Suite in 2016? Includes the Sandy Cape Granite, Interview Granite and the Three Hummock Island Granite.|||||Y||17-JAN-23
Sarah-Jane Quartzite|29227|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Anne Group|24391|||Precambrian|||||Precambrian||||||1000|TAS|Yes|42227|42227|Calver C.R.|05-JUL-85||||Orthoquartzite.||||N||17-JAN-23
Sassafras Creek Formation|16632|Sassafras Creek Member|24624|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Chudleigh Subgroup|4059|||Eastonian||||deposition|Gisbornian|||||||TAS|No|41954|41954|||||Reserved as Sassafras Creek Member (Banks and Burrett, 1977).|Limestone, 3m crinoidal calcarenite base, then dominantly dolomitic micrite with intermittent shelly beds (including horizons with stromatoporoids and corals).|carbonate sedimentary rock|||N||17-JAN-23
Sassy Creek Argillite|16634|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Cambrian|||||Cambrian||||||||No|41143||||||Elliott Bay-Mt Osmund area - in the Western Epiclastics rock grouping. Correlated with Mount Read Volcanics. Age and description from GSA Special Publication 15, p117.|Sequence of interbedded black shale (phyllitic), dolomite, and greywackes.||||N||17-JAN-23
Satellite Siltstone|16635|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian||||||||No|31461||||||See also Banks, Hale & Yaxley (1955), Pap & Proc Roy Soc Tas 89 p219-229. Occurs on Satellite Island, W of Alonnah, Bruny Island.||siliciclastic sedimentary rock|||N||17-JAN-23
Savage Dolomite|26887|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Ahrberg Group|160|||Cryogenian||||deposition|Cryogenian||||||||No|33839|||||||Shallow-marine, fine-grained dolostone with rare columnar stromatolites, oolitic dolograinstone and chert; dolomite, chert, shale and diamictite.|carbonate sedimentary rock|||N||17-JAN-23
Scamander Formation|16654|Scamander Slate and Quartzite|75740|||Yes|Formation, beds|Formal|Other new published name|Defined|Panama Group|36814|||Lower Devonian|||biozone|deposition|Lower Devonian|||biozone||||TAS|Yes|43547||||Forsyth, S.|07-SEP-10||Abundant massive sandstone units with distinctive mudstone-rich units; turbiditic, quartz-rich.|siliciclastic sedimentary rock|||N||17-JAN-23
Scamander Tier Granodiorite|16657|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||Scamander Tier Suite|31506|Upper Devonian||||intrusion|Middle Devonian||||||||No|35826||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Same as Scamander Tier Dyke?|I-type biotite-hornblende granodiorite|acid intrusive rock|||Y|I-type|17-JAN-23
Scamander Tier Suite|31506|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||Gardens Supersuite|31502|Devonian|||||Devonian||||||||No|42726||||||Bassian Batholith|I-type granites/granodiorites; contains hornblende, some very minor clinopyroxene, sphene, allanite; mafic enclaves. Likely substantially restite-fractionated.|acid intrusive rock|||Y|I-type|17-JAN-23
Schouten Island Granite|26889|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Freycinet Suite|40888|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). One of the South East Coast granites.|I-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Scopus Formation|22823|||||Yes|Formation, beds|Formal|Resvd name published|Defined|||||Furongian|||biozone|deposition|Middle Cambrian|||biozone||||TAS|No|43777||Everard J.L.|14-MAY-92|||In the Smithton Basin.|Interbedded mudstone, siltstone and lithic wacke sandstone, polymict granule conglomerate, siltstone and mudstone; fossiliferous, turbiditic.|siliciclastic sedimentary rock|||N||17-JAN-23
Scotchfire Metamorphic Complex|73352|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described||||||||||||||||||No|63167|||||||Phyllite, schist, quartzite and dolomite in southeast; phyllite, quartz-chlorite schist, slate, quartzite  and dolomite east and north of Artists Hill.|metasedimentary siliciclastic rock|||N||17-JAN-23
Scott Quartz Keratophyre|16686|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Dundas Group|26529|||Cambrian|||||Cambrian||||||||No|24548||||||Of Wells (1957).  Also interfingers with Warner Siltstone.|Flaggy, white, shallowly-dipping quartzite beds.|metasedimentary siliciclastic rock|||N||17-JAN-23
Scotts Peak Road Member|24490|||||Yes|Member, phase|Formal|Resvd name published|Defined|Huon River Formation|24313|||Precambrian||||deposition|Precambrian|||||||TAS|Yes|42227|42227|C.R.Calver|04-NOV-87||||Variegated, usually reddish, interlaminated slate and siltstone, conformably enclosed by weathered pale greenish-grey to yellow-brown slate and dolomitic siltstone of the Huon River Formation.||||N||17-JAN-23
Sea Elephant Granite|25467|Sea Elephant Adamellite|33456|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Sandblow Suite|79596|Visean|333.6||isotopic, K/Ar|intrusion|Tournaisian|354.3||isotopic, K/Ar|||||No|42726||||||Formal name not intended in 1991, but formalised in 2005.   Seymour, D.B  Calver C.R. (1998), NGMA TASGO PROJECT : subproject 1; Geological Synthesis: Time-Space Diagram For Tasmania.  Age determined by K/Ar dating. Previously of Grassy Suite.|I-type granite: hornblende-biotite granodiorite/adamellite, coarse-grained, abundant perthitic K-feldspar phenocrysts, quartz, plagioclase; accessory sphene, magnetite, apatite, zircon, allanite.|acid intrusive rock|||Y|I-type|17-JAN-23
Semail Ophiolite|16746|||||Yes|Formation, beds|Formal|Other new published name|Mentioned||||||||||||||||||No|41562|||||||||||N||17-JAN-23
Serpentine Hill Ultramafic Complex|16768|Serpentine Hill ultramafic complex|16771|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Early Cambrian|||||Early Cambrian|514|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|41795||||||Age from 'Geology and Mineral Resources of  Tasmania 1989, Ch3 p72.|Serpentinised ultramafics, gabbros and basalts. Dominated by layered pyroxenite and dunite intruded by two-pyroxene gabbro.|ultramafic intrusive rock|||N||17-JAN-23
Settlers Schist|35840|Settlers Metamorphosed Greywacke|16776|||Yes|Formation, beds|Formal|Variation of published name|Described|Andersons Creek Ultramafic Complex|424|||Middle Cambrian|504|22|||Early Cambrian|517|9||||||No|23326||||||Includes Settlers metamorphosed greywackes and the Simmonds Hill metamorphics of Green (1959) - indistinguishable in the field.|Exposed as 3 small blocks forming lenses of quartz-mica-feldspar with minor chlorite and epidote.|metamorphic rock|||N||17-JAN-23
Sheoak Hill Granite|16821|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Part of the Blue Tier Batholith.|S-type biotite alkali-feldspar granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Sherbrook Group|16826|||||Yes|Group, Suite|Formal|Variation of published name|Fully described|Otway Supergroup|28897|||Maastrichtian|||||Cenomanian||||||5000||No|34063||||||Previously of the Knight Group. Poor hydrocarbon source potential.|Interbedded conglomeratic sandstone, sandstone, siltstone and claystone; the latter two dominating at depth.|siliciclastic sedimentary rock|||N||17-JAN-23
Shoemaker beds|73118|Shoemaker Beds|16850|||Yes|Formation, beds|Informal|Variation of published name|Briefly described||||||||||||||||||No|63170||||||Correlate of units of the Gordon Group.|Deep-water graptolitic shale and carbonate turbidite.|siliciclastic sedimentary rock|||N||17-JAN-23
Shower Droplet Volcanics|74594|Shower Droplet Formation|37345|||Yes|Formation, beds|Formal|Variation of published name|Defined|Skipworth Subgroup|37342|||Ediacaran||||eruption|Ediacaran|579|16|isotopic, Sm/Nd isochron age|||300|TAS|Yes|62516|69841|Direen, N. (GSTAS)|24-JUN-08|Forsyth, S.|02-NOV-08|Notification of name change rec'd from S. Forsyth, June 2008. PP.|Picritic pillow lavas and unsorted, poorly stratified volcanic breccia and minor volcanic sandstone; stacked thin vesicular flows with chilled margins, overlain by c.50m of well-bedded, coarse-grained volcaniclastic sandstone with thin ropy flows.|basic volcanic rock|||N||17-JAN-23
Sideling Sandstone|75362|Sidling sandstone|36811|||Yes|Formation, beds|Formal|Variation of published name|Defined|Panama Group|36814|||Lower Devonian|||biozone|deposition|Lower Devonian|||inferred, underlying unit||1500|2000|TAS|Yes|67503|67493|Seymour, D. (MRT)|08-JUL-09|Forsyth, S.|07-SEP-10|Lisle 1:25 000 map sheet area (part of 8415). Dominantly fine-grained sandstone, some interbedded siltstone; turbiditic in part. Early Devonian age. This is a formalisation and name correction of the previous informal (and misspelt) "Sidling sandstone". Note, previous database entry (Strat No 34172) identifying Sidling Sandstone as a formal unit appears to be in error and based on a few erroneous uses in figures in publications by A.R. Reed, in which most uses in the body text were the correct, informal "Sidling sandstone". Map Sheet given above is TasMap 1:25,000 series. Published in Mineral Resources Tasmania publications arising from TasExplore Project (late 2009 - 2010). Possible AJES paper(s) - 2010?|Dominantly fine-grained sandstone, some interbedded siltstone; turbiditic in part.|siliciclastic sedimentary rock|||N||17-JAN-23
Singing Creek Formation|26140|||||Yes|Formation, beds|Formal|Variation of published name|Defined|Denison Group|5370|||Late Cambrian||||deposition|Late Cambrian||||||700|TAS|No|30274|30275|||||Within the Wurawina Supergroup. Also referred to as Singing Creek Siltstone - names used interchangeably in TSG Spec. Pub. 15 (1989) - Geology and Mineral resources of Tasmania. The Formation probably has precedence.|Predominantly quartzwacke turbidite (lower conglomerate sequences, typically pebble to boulder grade, with sandstone interbeds) with Idamean faunas.|siliciclastic sedimentary rock|||N||17-JAN-23
Sisters Granule Conglomerate|74350|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||deposition|||||||||No|66172|||||||Quartz sandstone association of rocks forming base of Upper Parmeener Supergroup in the St Marys and Apslawn area.||||N||17-JAN-23
Skinners Flat Siltstone|78545|Specimen Hill siltstone|73338|||Yes|Formation, beds|Formal|Other new published name|Fully described|Balfour Subgroup|40970|||Neoproterozoic|||inferred, geological correlation|deposition|Mesoproterozoic|1426|11|inferred, overlying unit|maximum depositional age|||TAS|No|67502||||||Age poorly constrained by age of dolerite dykes intrusions into other Rocky Cape Group units, and slate ages (643+/-10Ma), and biostratigraphy and isotope chemostratigraphy of overlying Black River Dolomite (~750-650 Ma).|Variegated, laminated to gutter-cast and trough cross-bedded light grey siliceous fine-grained sandstone and siltstone, and dark grey carbonaceous siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Skipping Ridge Formation|23975|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian|||||||TAS|No|69854|39579|Geological Survey of Tasmania|03-AUG-79||||Alternations of dark calcareous productid and bryozoal siltstone, and impure micritic limestone; minor sandstone/conglomerate.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Skipworth Subgroup|37342|Skipworth Volcanics|37337|||Yes|Subgroup|Formal|Variation of reserved name|Described|Grassy Group|7717|||Ediacaran|579|16|isotopic, Sm/Nd isochron age||Ediacaran||||||1700||No|60650||Direen N.|29-DEC-98|||King Island. Definition in PhD.? Comprises 4 distinct mafic intrusive or volcanosedimentary units, 2 being tholeiitic and 2 of primitive chemistry.|Comprises thick submarine to subaerial volcanics. Tholeiitic basalt with picrite.|basic volcanic rock|||N||17-JAN-23
Slaughter Bluff Volcanic Breccia|16990|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||||||eruption|||||||||No|45087|||||||Bedded basaltic flow-foot pillow breccias and associated small pillow lava flows, with dips of 15-45 degrees probably representing original depositional slopes.||||N||21-SEP-23
Slide Conglomerate|29006|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||deposition|||||||||No|37412||||||See also Slide Breccia - names used interchangeable in article. Unclear which takes precedence?|||||N||17-JAN-23
Smithton Dolomite|17009|||||Yes|Formation, beds|Formal|Other new published name|Described|Kanunnah Subgroup|34163|||Ediacaran|545|||deposition|Ediacaran|580|||||1500|TAS|No|31172||||||Introduced by Spry (1957). In the Smithton Basin. Strontium isotope chemostratigraphy gives age of c. 570-545 Ma (Calver 1998). Previously included rocks now assigned to the older Black River Dolomite.|Shallow marine deposits - interbedded dolomite and dolomitic limestone.|carbonate sedimentary rock|||N||17-JAN-23
Sock Creek Basalt|79507|||||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Late Cambrian||||eruption|Middle Cambrian||||||||No|69874||||||Advised by MRT staff 7-SEP-2016 that this is NOT a variation on the informal unit Sock Creek lava (unit no. 73810).||basic volcanic rock|||N||17-JAN-23
Sock Creek rhyolite|79508|Sock Creek lava|73810|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Late Cambrian||||eruption|Middle Cambrian||||||100||No|69874||||||Variation on the  informal Sock Creek lava (unit no. 73810). Rosebery to Mount Cattley area.|Rhyolitic-dacitic lavas.|acid volcanic rock|||N||17-JAN-23
South West Cape Granite|33462|||||Yes|Formation, beds|Formal|Other new published name|Described|||||Late Cambrian|497|3||intrusion|Late Cambrian|497.8|3.3|isotopic, U/Pb-Pb/Pb ion probe|||||No|44105||||||Southern Tyennan Element. McClenaghan suggests this granite is Cambrian in email 25-MAR-2004.  Age and grouping (ie, ungrouped) derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Southern Central Volcanic Complex|79509|Central Volcanic Complex|3868|||Yes|Subgroup|Informal|Variation of published name|Described|Central Volcanic Complex|3868|||Middle Cambrian||||eruption|Middle Cambrian||||||||No|69874||||||With the Northern Central Volcanic Complex, represents a subdivision of unit no. 3868.|Dominated by felsic to intermediate, generally feldspar-phyric rocks: lavas, intrusives and volcaniclastic rocks, with minor non-volcanic sandstones and shales; granites and andesites; pumice-rich mass-flow breccias common.|acid igneous rock|intermediate igneous rock||Y||17-JAN-23
Southern Hobart Group|37073|||||Yes|Group, Suite|Informal|Other new published name|Mentioned||||||||||||||||||No|23718|||||||||||N||17-JAN-23
Southwell Subgroup|30229|||||Yes|Subgroup|Formal|Other new published name|Described|Mount Charter Group|30225|||Middle Cambrian|||||Middle Cambrian||||||||No|43131|||||||Volcaniclastic mass-flow sandstones and breccias interbedded with siltstone, mudstone, quartzwacke sandstone and granule-pebble conglomerate, with some felsic lavas and intrusives. Contains shallow water limestone clasts with trilobites.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Southwest Island Granite|17136|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Deal Island Suite|31570|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|S-type biotite alkali-feldspar granite|acid intrusive rock|||Y||17-JAN-23
Spero Bay Group|27571|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Devonian|||||Devonian||||||||No|43461||||||Includes Point Hibbs Limestone, Red Reef Cliff Sandstone and Whitehorse Beach Sandstone. See also the informal  "Spero Bay Group".|||||N||17-JAN-23
Spero Bay Ultramafic Complex|40955|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Cambrian|||||Cambrian|514|5||||||No|63168||||||Brown, A.V. 1989. Eo-Cambrian-Cambrian. In: Burret, C.F., Martin, E.L. (ed.): Geology and Mineral Resources of Tasmania.  Geological Society of Australia Inc. Spec. Publ. 15.|Layered peridotite, serpentinite and associated rocks.|ultramafic igneous rock|||N||17-JAN-23
Sphinx Rock Member|74583|||||Yes|Member, phase|Informal|Other new published name|Mentioned|||||||||deposition|||||||||No|63868||||||Unit in the Hobart area.|||||N||17-JAN-23
Spinks Creek Volcanics|35367|Spinks Creek Basalt|22880|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Kanunnah Subgroup|34163|||Ediacaran|||inferred, overlying unit|eruption|Ediacaran|||inferred, underlying unit|||1000|TAS|No|23191||Everard J.L.|29-MAR-00|||Within the Togari Group.Smithton Basin.|Extrusive tholeiitic basalts, local pillows and amygdales; mostly tholeiitic basalts.|basic volcanic rock|||N||17-JAN-23
Sprent Formation|17183|||||Yes|Formation, beds|Formal|Other new published name|Fully described|||||||||deposition|||||||||No|31472||||||Of Radford Creek Group according to 2003 digital map of Tasmania.|Conglomerates rich in allochthon-derived chert and basalt detritus; some intercalated units of volcaniclastic sandstone and mixed provenance sandstone. Unfossiliferous.|siliciclastic sedimentary rock|||N||17-JAN-23
Spreyton beds|74351|Spreyton Beds|17184|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Cisuralian|||||Pennsylvanian||||||||No|63172||||||See also Spreyton Formation and Spreyton Coal Measures.|||||N||17-JAN-23
Springmount Mudstone|17215|Springmount Formation|17214|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|Bogan Gap Group|2080|||Late Permian||||deposition|Late Permian||||||69||No|34047||||||See also Springmount Formation.|Hard, dark grey mudstone with some sandy beds.|siliciclastic sedimentary rock|||N||17-JAN-23
Springs Sandstone|17220|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Upper Parmeener Supergroup|18944|||Lower Triassic||||deposition|Triassic||||||92.5||No|63868||||||See also Spring Sandstone. Of Lewis (1940).||siliciclastic sedimentary rock|||N||17-JAN-23
Squirrel Creek Formation|17232|||||Yes|Formation, beds|Formal|Other new published name|Defined|Denison Group|5370|||Lower Ordovician||||deposition|Lower Ordovician||||||700|TAS|No|30275|30275|||||Thickness: ~700m.|Shallow-marine sandstone and calcareous siltstone, with a rich Ordovician fauna.|siliciclastic sedimentary rock|||N||17-JAN-23
St Marys Porphyry|73820|St Marys Porphyrite|34174|||Yes|Formation, beds|Formal|Resvd name published|Briefly described|||Scamander Tier Suite|31506|Middle Devonian|388|1|isotopic, K/Ar|eruption|Middle Devonian|388|1|isotopic, Rb/Sr|||||No|67503||J.Everard|02-NOV-07|||Preferred spelling and rock name by MRT (J.Everard, pers.comm., 2005), Published in Surface Geology of Australia, 1:1,000,000 scale - Eastern States (2nd edition).|I-type quartz-pyroxene porphyrite.|acid volcanic rock|||Y|I-type|17-JAN-23
Standard Hill Formation|17257|Standard Hill Member|22888|||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Chudleigh Subgroup|4059|||Darriwilian||||deposition|Darriwilian|||||||TAS|No|41954|41954|||||Reserved as Standard Hill Member by Banks M.R., Burrett C.F. (1977).|Oncolitic calcarenite with minor interbedded oolitic calcarenite and dolomitic micrite; a 40m thick layer of cross-bedded quartz sandstone and minor quartz-pebble conglomerate; limestone, interbedded with sandstone of Moina Sandstone upper unit.|carbonate sedimentary rock|||N||17-JAN-23
Stanley beds|17267|Stanley Beds|17265|||Yes|Formation, beds|Informal|Variation of published name|Described||||||||||||||||||No|69849||||||Age given as Tertiary.|Agglomerate, tuffs and tuffaceous sedimentary rocks; interbedded coarse-grained analcime-bearing basalt.|sedimentary rock|basic volcanic rock||N||17-JAN-23
Stephens Dolomite|17323|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|Clark Group|4102|||||||deposition|||||||||No|41793||||||Thickness: >1200m.|||||N||17-JAN-23
Sterling Valley Volcanics|40325|||||Yes|Formation, beds|Formal|Other new published name|Described|Northern Central Volcanic Complex|79500|||Late Cambrian||||eruption|Middle Cambrian||||||||No|23943|||||||Tholeiitic basaltic and andesitic lavas, breccias, intrusives, volcaniclastics; plagioclase-pyroxene-hornblende-phyric to aphyric.|basic volcanic rock|intermediate volcanic rock||N||17-JAN-23
Sticht Range Formation|26910|Sticht Range Beds|17330|||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Late Cambrian||||deposition|Middle Cambrian||||||1200||No|41695||||||See Sticht Range beds and Sticht Range Beds.|Coarse-grained siliciclastics: quartz-rich sandstone-siltstone-conglomerate units of metamorphic derivation.|siliciclastic sedimentary rock|||N||17-JAN-23
Stitt Quartzite|17341|||||Yes|Formation, beds|Formal|Other new published name|Described|Owen Group|34165|||Mindyallan|||||Mindyallan||||||300||No|31174|||||||Interbedded micaceous quartzwacke sandstone, siltstone, grey-black mudstone and minor siliceous conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Stockers Tillite|17344|Stockers Formation|17343|||Yes|Formation, beds|Formal|Variation of published name|Fully described|Lower Parmeener Supergroup|10795|||Cisuralian||||deposition|Cisuralian||||||180||No|24548||||||See also the version Stocker's Tillite.|Diamictite, conglomerate, sandstone, pebbly mudstone and rhythmite.|siliciclastic sedimentary rock|||N||17-JAN-23
Stoney Creek Granitic Porphyry|17369|Stoney Creek granitic porphyry|17370|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||||||eruption|||||||||No|41142|||||||||||U||17-JAN-23
Stony Head Sandstone|17376|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Tippogoree Group|36813|||Ordovician|423|22|isotopic, Rb/Sr|deposition|Ordovician|455|30|inferred|||1000|TAS|No|64396|42878|||||Formerly of the Mathinna Group; now of the Tippogoree Group (Mathinna Supergroup). Oldest unit of Mathinna Supergroup. Min age is for metamorphism and penetrative cleavage formation.|Graded thick-bedded fine-grained turbiditic sandstone with minor interbedded pelite; large-scale recumbent folds and cleavage. Classic proximal turbidites. The sandstone is qtz rich occurring in graded beds, up to 2 m thick in some exposures.|siliciclastic sedimentary rock|||N||17-JAN-23
Strahan Sand Member|76019|||||Yes|Member, phase|Formal|Variation of published name|Defined|Macquarie Harbour Formation|76018|||Early Eocene||||deposition|Early Eocene||||||5|TAS|No|66858|66858|||||Strongly influenced by wave action; likely a barrier-bar. Overlain by plastic brown clay beneath carbonaceous mud. Type section at sand quarry at Dead Horse Point. Forms steep cliffs at various spots around Risby Cove. Age: Early Eocene Malvacipollis diversus Zone of Stover and Partridge (1973)|Very well-sorted fine to coarse quartz sand; homogeneous in composition and texture, although bottom 1 m is trough cross-bedded; this is overlain by 0.5 m transitional zone of very low-angle bedding overlain by 1 m of well-defined low-angle bedding.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Strathgordon Metamorphic Complex|36135|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Neoproterozoic|||||Neoproterozoic|510|11|chemical U-Th-Pb|||||No|63167|||||||Dominantly quartzite and phyllite; minor amphibolite, carbonate and ironstone. Deformed and cleaved.|metasedimentary siliciclastic rock|||N||17-JAN-23
Strickland Gorge Formation|24508|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||60|TAS|Yes|41696||Everard J.L.|12-JAN-88||||Poorly sorted pebbly mudstone, sandstone and minor conglomerate, marine fossils present in places.|siliciclastic sedimentary rock|||N||17-JAN-23
Strzelecki Granite|26916|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Boobyalla Suite|31666|Upper Devonian|384|3||intrusion|Middle Devonian|385|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). One of the Furneaux Islands granites on Flinders Island.|S-type biotite-garnet alkali-feldspar granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Studland Bay Basalts|17461|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Neogene||||eruption|Cenozoic||||||||No|42552|||||||Pillow, 'entrail' and massive-columnar, olivine basalt lavas.|basic volcanic rock|||N||21-SEP-23
Styx Dolomite|24509|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Weld River Group|24566|||Late Precambrian||||deposition|Late Precambrian||||||500|TAS|Yes|41908||Calver C.R.|04-DEC-89|||Fully described in Calver (1989) p47.|Consists of massive, white to pale grey, fine-grained dolomite.|carbonate sedimentary rock|||N||17-JAN-23
Success Creek Group|17488|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Ediacaran|600|||deposition|Cryogenian|700|||||1000||No|31172||||||Dundas Trough? Cratonic shallow-water sedimentary sequence.|Fluviatile deposits - lower siliceous sandstone; upper siliceous siltstone, mudstone, dolomite and stromatolite clast-bearing, oolitic, chert breccia units.|sedimentary rock|||N||17-JAN-23
Sulphur Creek Conglomerate|17512|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|35288|||||||||||N||17-JAN-23
Sunset Bay Sandstone|35496|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Sakmarian||||||||No|23222||||||See also Kingborough Explan Notes (1985), p16 ; Banks, Hale & Yaxley (1955), Pap & Proc Roy Soc Tas 89 p219-229. Occurs on Satellite Island, W of Alonnah, Bruny Island.|Grey, or mottled grey, well-sorted, angular fine-grained quartz and quartz feldspar sandstones; a few erratics of granite and quartzite; glendonites present; small pyrite concretions in upper part; worm tracks, burrows, rare macrofossils in lower part|siliciclastic sedimentary rock|||N||17-JAN-23
Supply River Sandstone|33767|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||deposition|||||||||No|||Hills P.|29-OCT-99|||Badger Head area.||siliciclastic sedimentary rock|||N||17-JAN-23
Surprise Bay Formation|41157|||||Yes|Formation, beds|Formal|Resvd name published|Fully described|||||Ectasian|1290||inferred, geological correlation|deposition|Ectasian|1350|||||||No|63675||McClenaghan, M.|01-JUN-04|||Western King Island. Age controlled by detrital zircons c 1350 Ma (Black et al., 2004), and early regional Grevillian-age (1287 +/- 18 Ma) metamorphic event dating of monazite in metasedimentary rocks (Berry et al. 2005)|Quartz-rich, fine-grained sandy turbidite beds alternating with metasiltstone and pelitic schist. Sandier, thicker bedded intervals alternate with the thinner-bedded, more pelitic intervals.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||17-JAN-23
Swifts Jetty Sandstone|17586|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Masseys Creek Group|11437|||Permian||||deposition|Permian||||||||No|34098|||||||Richly fossiliferous, glauconitic and conglomeratic sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
Table Cape Group|17623|Table Cape Beds|17621|||Yes|Group, Suite|Formal|Variation of published name|Described|||||Early Miocene|||||Chattian||||||30||No|44238||||||See also Lexicon. SK55-2/ Table Cape.|Marine calcarenite.|siliciclastic sedimentary rock|||N||17-JAN-23
Tarraleah Till|17866|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||Pleistocene|||||Pleistocene||||||||No|30524|||||||||||N||17-JAN-23
Tasmanian Cenozoic Basalts 83473|83473|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Miocene|11||inferred||Paleocene|59||inferred|||||No|||||||For Cenozoic layer of the Alkaline Rocks compilation. See Everard et al. (2014) for age information..|Basalt (tholeiitic to alkalic) and related pyroclastic rocks.|basic volcanic rock|||N||17-JAN-23
Tasmanian Dolerite|17883|Tasmanian dolerite|17885|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Jurassic||||intrusion|Jurassic||||||||No|33627||||||One of Tasmania's major rock types, mentioned in many publications. See also Tasmanian Dolerites.|Dolerite and related rocks|basic intrusive rock|||Y||17-JAN-23
Tasmanites Shale|68975|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Pennsylvanian||||deposition|Pennsylvanian||||||||No|63172||||||Named for the Tasmanites microfossil that occurs in the formation. See also Tasmanite Shale and Tasmanite Oil Shale and informal versions of same.||siliciclastic sedimentary rock|||N||17-JAN-23
Tayatea Dolerite|40981|Tayatea Dyke Swarm|78300|||Yes|Formation, beds|Formal|Resvd name published|Described|||||Cryogenian|||inferred, intrusive relationship|intrusion|Cryogenian||||||||No|||Everard, J.|07-MAY-04|||John Everard suggests the name Tayatea Dyke Swarm to replace the invalid 'Rocky Cape Dyke Swarm'. This avoids  the name clash with Rocky Cape Group. Used in Tasmanian 1:250k seamless geology.|Tough, massive, usually aphanitic, dark grey-green to blue-grey dolerite; some more felsic dykes are coarser-grained and granophyric. Alkali dolerite dykes containing titaniferous augite, amphibole and rare biotite; some largely replaced by carbonate.|basic intrusive rock|||Y||13-SEP-23
Tayatea Dolerite - alkaline dolerite|84031|||||Yes|Member, phase|Informal|Other new published name|Briefly described|Tayatea Dolerite|40981|||Neoproterozoic|||||Cryogenian||||||||No|||||||Alkaline dykes identified within the predominantly tholeiitic Tayatea Dolerite. Used in Tasmanian 250K seamless geology.|Alkali dolerite dykes containing titaniferous augite, amphibole and rare biotite; some largely replaced by carbonate||||Y||14-SEP-23
Teatree Point Breccia|73119|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described||||||||||||||||150||No|44135||||||In the Dial Range Trough.|Block of chert and other lithologies in a matrix of lithic wacke and conglomerate.|medium-coarse grained siliciclastic rock|non-carbonate chemical or biochemical sedimentary rock||N||17-JAN-23
Tebrakunna Dolerite|75979|||||Yes|Formation, beds|Reserved|Reserved|Defined|||||Mississippian|330|6|isotopic, K/Ar|intrusion|Upper Devonian|||inferred, intrusive relationship||||TAS|Yes|||Everard, J.L. (MRT)|24-MAY-11|Forsyth, S.|26-MAY-11|See Definition card. Proposed publications: CORBETT K.D. QUILTY P. G. & CALVER C. R. (Eds.). In prep. (2011?) The Geological Evolution of Tasmania. Geological Society of Australia Special Publication. [Note to ASUD staff : use definition to update intrusive relationships for other units when this name  is published]. Distinguished from Jurassic dolerite by form, metamorphism and geochemistry.Usually straight to undulose, sharp contacts with chilled margins; rarely irregular diffuse contacts with indications of assimilation or magma mixing with host granite.|Dark grey, fine- to medium-grained (mean grain size 0.5 - 2 mm), aphyric to sparsely plagioclase-phyric dolerite, with primary plagioclase, augite or titaniferous augite, olivine (?), ilmenite and magnetite.|basic intrusive rock|||Y||17-JAN-23
The Dutchman Granite|18038|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Poimena Suite|31626|Upper Devonian||||intrusion|Middle Devonian||||||||No|42726||||||Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond).|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
The Hazards Granite|26937|||||Yes|Formation, beds|Informal|Other new published name|Described|||Freycinet Suite|40888|Upper Devonian|379|2|isotopic, U/Pb-Pb/Pb ion probe|intrusion|Middle Devonian||||||||No|42726||||||Formal name not intended in 1991, but subsequently used by MRT. Included in Boobyalla Suite of Chappell 1991. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). See also probable misspellings Hazards Granite, Hazard Granite.|I-type biotite alkali-feldspar granite|acid intrusive rock|||Y|I-type|17-JAN-23
Thirlstane Basalt|18060|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Eocene|38||isotopic, K/Ar|eruption|Eocene|38||isotopic, K/Ar|||175||No|34513|||||||Repetitious thin flows of alkali olivine basalt.|basic volcanic rock|||N||17-JAN-23
Thirsty Lagoons Granite|73632|Thirsty Lagoons granite|24025|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Devonian||||intrusion|Devonian||||||||No|63540|||||||S?-type,felsic granite.|acid intrusive rock|||Y|S-type|17-JAN-23
Thomas Creek Andesite|79055|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|Mount Read Volcanics|13057|||Furongian||||eruption|Furongian||||||||No|69859||||||Elliott Bay-Queenstown-Rosebery region.|Andesitic lavas, breccias and intrusive rocks.|intermediate volcanic rock|intermediate intrusive rock||N||17-JAN-23
Thompson Formation|18067|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Dundas Group|26529|||||||deposition|||||||||No|24548||||||Also referred to as Thompson Slate and Greywacke.|Slate and greywacke.|medium-coarse grained siliciclastic rock|metasedimentary siliciclastic rock||N||17-JAN-23
Three Hummock Island Granite|18100|Three Hummock Island Adamellite|33460|||Yes|Formation, beds|Formal|Other new published name|Described|||Interview Suite|31593|Carboniferous|335||isotopic, K/Ar|intrusion|Carboniferous|349||isotopic, K/Ar|intrusion||||No|42726||||||Name inferred from map "Tasmanian granites and associated mineralisation" (2005). S-type biotite granite. May now (2016) be considered part of Sandy Cape Suite?|Adamellite to alkali-feldspar granite. Med.- to coarse-gr., K-feldspar, plagioclase, quartz, biotite+muscovite, and accessory tourmaline+apatite. K-feldspar megacrysts are variably abundant; some cordierite.|acid intrusive rock|||Y|S-type|17-JAN-23
Thureau Formation|24033|Thureau formation|18108|||Yes|Formation, beds|Formal|Resvd name published|Fully described|||||||||deposition|||||||||No|41993||Fitzsimons S.J.|17-MAR-89||||||||N||17-JAN-23
Thylacine Member|79581|Thylacine Sandstone Member""|79252|||Yes|Member, phase|Informal|Variation of published name|Briefly described|Belfast Mudstone|1415|||Santonian||||deposition|Santonian||||||||No|69879||||||Apparently a formalisation of  "Thylacine Sandstone Member" (unit no. 79252), but shown as member of Belfast Formation rather than current Belfast Mudstone. No definition has yet (2016) been indexed.|Fluvio-deltaic sandstone. Hydrocarbon reservoir.|medium-coarse grained siliciclastic rock|||N||16-OCT-23
Tiers Formation|26942|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Upper Parmeener Supergroup|18944|||Ladinian||||deposition|Anisian||||||25||No|24549|||||||Feldspathic sandstones. No coal and carbonaceous bands are present. Alternations of grey-green shale and non-carbonaceous feldspathic sandstone.||||N||17-JAN-23
Tiger Range Group|18145|||||Yes|Group, Suite|Formal|Other new published name|Defined|Wurawina Supergroup|24587|||Lower Devonian|||||Silurian|||||||TAS|No|35671|35671||||||Shallow marine siliciclastic rocks: quartz sandstone, siltstone and shale.|siliciclastic sedimentary rock|||N||17-JAN-23
Tim Shea Sandstone|28236|Tim Shea Conglomerate|18154|||Yes|Formation, beds|Formal|Variation of published name|Defined|Denison Group|5370|||Lower Ordovician||||deposition|Late Cambrian|||||||TAS|No|30277|30277|||||Correlated with upper part of Reeds Conglomerate (GSA Special Publication 15 (1989), p186). Formerly of Denison Subgroup.|Includes grey, flat-bedded, strongly bioturbated sandstone with some gastropods, cross-bedded red sandstone, pebbly sandstone; and chert, some siltstone and minor conglomerate.|siliciclastic sedimentary rock|||N||17-JAN-23
Timbs Group|26945|Timbs Creek Formation|23007|||Yes|Group, Suite|Formal|Resvd name published|Described|Arthur Metamorphic Complex|647|||Ediacaran|||||Cryogenian||||||||No|42551||||||Part of the Arthur Metamorphic Complex.|Boudinaged thin beds of quartzarenite and quartzarenite-derived conglomerate; two major metabasite units; interbanded quartzite and schist; interbanded green to grey phyllite and fine- to medium-grained quartz-muscovite schist.|metasedimentary siliciclastic rock|metasedimentary carbonate rock||N||17-JAN-23
Tippogoree Group|36813|||||Yes|Group, Suite|Formal|Other new published name|Defined|Mathinna Supergroup|36812|||Silurian|||inferred, overlying unit||Lower Ordovician||||||2000|TAS|Yes|23850|23850|||Forsyth, S.|03-JUL-01||Thick, graded beds of fine- to medium-grained, rarely coarse-grained, sandstone and minor pelite stratigraphically overlain by predominantly massive but rarely turbidated black slate.|siliciclastic sedimentary rock|||N||17-JAN-23
Toarra Formation|24038|||||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Kazanian||||deposition|Kungurian|||||||TAS|No|69854|39579|Geological Survey of Tasmania|03-AUG-79||||Poorly sorted siltstone and minor conglomerate, bioturbated in parts.|siliciclastic sedimentary rock|||N||17-JAN-23
Togari Group|23016|||||Yes|Group, Suite|Formal|Resvd name published|Fully described|||||Cambrian Series 2|520||inferred, biostratigraphic correlation||Cryogenian|650|||||4000|TAS|No|44135||Everard J.L.|14-MAY-92|||Late Precambrian and Cambrian. In the Smithton Basin. Age from indirect evidence from radiometric dating and stromatolites suggests late Neoproterozoic (<750Ma). Age range given as c. 750-520 Ma in 2007 ref.|Comprises mostly siltstone and dolostone overlain by volcaniclastic sandstone, conglomerate and breccia interbedded with tholeiitic basalts.Shelf and rift sequences.|sedimentary rock|basic volcanic rock||N||17-JAN-23
Togari Group and correlates|37485|Togari Group|23016|||Yes|Group, Suite|Informal|Variation of published name|Not recorded|||||Early Cambrian||||deposition|Neoproterozoic||||||||No|||||||Lithology recorded for this informal grouping  is that to be used for Tasmania 1:1million geological map, National Maps Project. Includes Togari Group, Ahrberg Group, Success Creek Group.|Undifferentiated sequences including dolomite, limestone, turbiditic volcaniclastic rocks, tholeiitic basalt, conglomerates and sandstones|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Tomahawk Formation (TAS)|18306|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Quaternary|||||Quaternary||||||||No|35466||||||Not to be confused with unit of the same name in Northern Territory.|Terrigenous quartz-glauconite sandstone.||||N||17-JAN-23
Tombstone Creek Granite|18315|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||Russells Road Suite|31541|Upper Devonian|385|2||intrusion|Middle Devonian|386|3|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726||||||See also Tombstone Creek Alkali-Feldspar Granite. Formerly of Tombstone Creek Suite. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Part of Scottsdale Batholith.|I-type biotite monzogranite: Alkali-feldspar granite pluton with strong pink colouration, equigran. coarse to fine-gr.quartz, K-feldspar, plagioclase+Fe-rich biotite; interior is adamellite.|acid intrusive rock|||Y|I-type|17-JAN-23
Tombstone Creek Suite|31542|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||Tulendeena Supersuite|31538||||||||||||||No|42726|||||||||||Y||17-JAN-23
Top Orebody Bed|18424|||||Yes|Bed|Informal|Other new published name|Mentioned||||||||||||||||||No|31468||||||Probably not intended as a formal name?|||||N||17-JAN-23
Tor Creek Basalts""|79511|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||||||||eruption|||||||||No|69874|||||||Flows and plug-like bodies of olivine-plagioclase-phyric, tholeiitic basalt, with associated volcaniclastic sandstone and breccia. Strongly hematite-epidote altered; shows amygdaloidal and porphyritic textures.|basic volcanic rock|||N||17-JAN-23
Torquay Group|18441|||||Yes|Group, Suite|Formal|Other new published name|Fully described|||||Miocene||||deposition|Oligocene||||||1000||No|70942||||||Also includes Gellibrand Marl which has replaced Fyansford Clay in Torquay Group. Gellibrand Marl is also part of  Heytesbury Group.|Sandstone, shale, then shallow-marine calcarenite; limestone, clayey limestone, marl and calcareous clay.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Torquay Sequence|41027|||||Yes|Formation, beds|Sequence stratigraphy|Sequence strat published|Described|||||Quaternary|||||Chattian||||||||No|14235|||||||Shallow marine siltstones and marls, overlain by open marine carbonates; local volcanics.|carbonate sedimentary rock|fine grained siliciclastic rock||N||17-JAN-23
Traveller Clarence Rhythmites|18557|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||Pleistocene|||||Pleistocene||||||||No|30524|||||||||||N||17-JAN-23
Trefoil Island Volcanic Breccia|83235|Little Trefoil Basalt|10491|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Neogene|||inferred||Paleogene|||inferred|||||No|73329||||||Probably related to Little Trefoil Basalt.|Bedded basaltic flow-foot pillow breccias and associated small pillow lava flows, with dips of 15-45 degrees probably representing original depositional slopes.|basic volcanic rock|||N||17-JAN-23
Trial Harbour Ultramafic Complex|40953|||||Yes|Group, Suite|Formal|Variation of published name|Described|||||Early Cambrian|||||Early Cambrian|514|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|63168||||||Brown, A.V. 1989.  Eo-Cambrian-Cambrian.  In: Burrett, C.F., Martin, E.L. (ed.): Geology and Mineral Resources of Tasmania.  Geological Society of Australia Inc. Spec. Publ. 15.|Ophiolite sheet. Ultramafics - layered dunite and harzburgite. Variably serpentinised dunite with abundant magnetite, minor chromite, talc, chlorite; suggested metadunite; locally capped by ironstone.|ultramafic igneous rock|||N||17-JAN-23
Trial Ridge beds|73121|Trial Ridge Beds|26956|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||||Late Cambrian|||||Middle Cambrian||||||5000||No|63168||||||See Trial Ridge Beds.|Siliceous conglomerate, sandstone and siltstone; middle section contains trilobites and brachiopods.|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
Truro Tillite|24047|Woodbridge Glacial Formation|20483|||Yes|Formation, beds|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Pennsylvanian||||||580|TAS|No|39234|41895|N.Farmer|04-JUL-77||||Diamictite, conglomerate, sandstone, pebbly mudstone and rhythmite.|siliciclastic sedimentary rock|||N||17-JAN-23
Tulendeena Granodiorite|75566|Tulendeena Granite|18654|||Yes|Formation, beds|Reserved|Variation of published name|Briefly described|||Diddleum Suite|33464|Middle Devonian||||intrusion|Middle Devonian||||||||No|66575||Everard, J.L. (MRT) after Chappell et al 1991|18-DEC-09|||Bassian Batholith of Chappell et al 1991. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). Part of Scottsdale Batholith.|I-type biotite-hornblende granodiorite.|acid intrusive rock|||Y|I-type|17-JAN-23
Tulendeena Suite|31539|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||Tulendeena Supersuite|31538||||||||||||||No|42726|||||||||||Y||17-JAN-23
Tulendeena Supersuite|31538|||||Yes|Supergroup|Formal|Variation of published name|Briefly described||||||||||||||||||No|42726|||||||||||Y||17-JAN-23
Tullah Slates|18655|||||Yes|Formation, beds|Formal|Other new published name|Mentioned||||||||||||||||||No|36817|||||||||||N||17-JAN-23
Tunnelrace Volcanics|36134|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Ahrberg Group|160|||Neoproterozoic|580|||eruption|Neoproterozoic|650|||||||No|23460|||||||||||N||17-JAN-23
Turquoise Bluff Slate|18724|Turquoise Bluff|23067|||Yes|Formation, beds|Formal|Resvd name published|Defined|Tippogoree Group|36813|||Middle Ordovician|460||biozone|deposition|Lower Ordovician|485||biozone|||2000|TAS|No|64396|42878|||||Contains a graptolite of age: ca 485-460Ma. Previously of the Mathinna Group - now within the Tippogoree Group of the Mathinna Supergroup.|Massive or graded black phyllitic slate with recumbent folds, pervasive slaty cleavage, minor intercalations of occasionally graded siltstone beds up to 60cm thick.|fine grained siliciclastic rock|||N||17-JAN-23
Turritella bed|39202|||||Yes|Bed|Informal|Variation of published name|Briefly described|Dilwyn Formation|5489|||Longfordian|||||Longfordian||||||||No|61182||||||Is this one unit or two? The 2001 reference appears to be for a Tasmanian Early to Mid-Miocene (Longfordian) unit within Fossil Bluff Sandstone, but the others refer to a Victorian Early Eocene unit in the Otway Basin -  Minor unit of Dilwyn Formation (Wangerrip Group). See also Turritella Bed.  An informal name but current usage appears to favour this version??|||||N||17-JAN-23
Twelvetrees Quartzite|18738|||||Yes|Formation, beds|Formal|Other new published name|Mentioned||||||||||||||||||No|41793|||||||||||N||17-JAN-23
Twin Creeks Formation|24543|||||Yes|Formation, beds|Formal|Resvd name published|Defined|Mount Anne Group|24391|||Precambrian||||deposition|Precambrian||||||1000|TAS|Yes|42227|42227|Calver C.R.|05-JUL-85||||Dominantly phyllite with subordinate dolomite and quartz siltstone and rare orthoquartzite.|metasedimentary siliciclastic rock|carbonate sedimentary rock||N||17-JAN-23
Tyennan Group and correlates|37490|Tyennan Nucleus|34030|||Yes|Group, Suite|Informal|Other new published name|Briefly described|||||Neoproterozoic||||deposition|Mesoproterozoic||||||||No|||||||Lithology recorded for this informal grouping  is that to be used for Tasmania 1:1million geological map, National Maps Project. Includes Goat Island Conglomerate.|Pelitic schist and quartzite, some schistose conglomerate|siliciclastic sedimentary rock|||N||17-JAN-23
Tyler Creek beds|18751|Tyler Creek Beds|18750|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|Wurawina Supergroup|24587|||Late Cambrian|||||Middle Cambrian||||||||No|40714||||||Fully described as Tyler Creek Beds.|Serpentinitic conglomerate, sandstone and laminated mudstone; sponge spicules present indicating Cambrian or even Precambrian-Cambrian age. South Coast area.|siliciclastic sedimentary rock|||N||17-JAN-23
Tyndall Group|18756|||||Yes|Group, Suite|Formal|Variation of published name|Fully described|Mount Read Volcanics|13057|||Furongian|496|.6|isotopic, U/Pb-Pb/Pb, TIMS|eruption|Miaolingian|505||inferred, biostratigraphic correlation|||||No|30278||||||Historically this term encompassed all quartz-phyric rocks up the eastern side of Mount Read belt, and even most of those at Elliott Bay.However, recent mapping shows that the eastern succession is only partly Tyndall Group rocks.  Includes Comstock Formation and Zig Zag Hill Formation. Lithological description is that used for Tasmania 1:1million geological map, National Maps project.  NOT IN VICTORIA.|Marine. Andesitic to felsic volcaniclastic to polymict sandstone(crystal-rich), siltstone, mudstone, breccias, conglomerate, with minor lavas, rare limestone lenses (with fossils), welded ignimbrites. Basal exhalative massive sulfide lenses.|acid volcanic rock|||N||17-JAN-23
Ugbrook Formation|18771|||||Yes|Formation, beds|Formal|Variation of reserved name|Defined|Chudleigh Subgroup|4059|||Gisbornian||||deposition|Gisbornian|||||||TAS|No|41954|41954|||||Reserved as Ugbrook Formation by Banks M.R., Burrett C.F.(1977).|Limestone; nodules of micrite in a matrix of bioturbated pyritic mudstone, interpreted as lagoonal deposits; sparsely fossiliferous (brachiopods, trilobites).|carbonate sedimentary rock|||N||17-JAN-23
Ulverstone Metamorphics|18803|||||Yes|Subgroup|Formal|Other new published name|Briefly described|||||Early Cambrian|514||||Neoproterozoic||||||||No|33348||||||Age: ca. 514Ma. On Goat Island. Is this the same as Ulverstone Metamorphic Complex, included in Forth Metamorphic Complex in ~2000? Correlated with earliest sandstones in Transantarctic Mountains (similar detrital zircon spectra).|Massive and flaggy quartzite, schist; subordinate conglomerate, quartzite-derived, closed-framework, pebble to boulder grade.|metasedimentary siliciclastic rock|||N||17-JAN-23
Unicorn Point Granite|73629|Unicorn Point granodiorite|24055|||Yes|Formation, beds|Informal|Variation of published name|Briefly described|||Wybalenna Suite|31658|Devonian||||intrusion|Devonian||||||||No|63540||||||Probably should be Unicorn Point granodiorite - which is informal only.|I-type, mafic granite; weakly fractionated, reduced.|acid intrusive rock|||Y|I-type|17-JAN-23
Unicorn Point granodiorite|24055|||||Yes|Formation, beds|Informal|Other new published name|Fully described|||Wybalenna Suite|31658|Middle Devonian||||intrusion|Lower Devonian||||||||No|36374||D.J.Cocker|24-OCT-74|||Card. In press according to DL1980. Age and suite derived from the 2005 1:500,000 Tasmanian Granites Map and CD (HG, O. Raymond). See also Unicorn Point Granite - name implied only, from map legend.|I-type biotite monzogranite|acid intrusive rock|||Y||17-JAN-23
Upper Blessington Granodiorite|33465|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Russells Road Suite|31541|Middle Devonian|388.9|1.6||intrusion|Middle Devonian|388.9|1.6|isotopic, U/Pb-Pb/Pb ion probe|||||No|61723||||||Name implied but not used in GSA Special Publication 15 p259 (1989) 98/29072.  See also informal Upper Blessington Granite. Age + suite derived from 2005 1:500,000 Tasmanian Granites Map + CD (HG, O. Raymond). Named for the town of Upper Blessington.|I-type biotite-hornblende granodiorite, coarse to very coarse-grained.|acid intrusive rock|||Y|I-type|17-JAN-23
Valentines Peak Granite|19037|||||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Housetop Suite|31588|Upper Devonian||||intrusion|Devonian||||||||No|42726||||||Formal name not intended. Outlier of Housetop Granite. Should probably be included with Housetop Granite.||acid intrusive rock|||Y||17-JAN-23
Valley Bay Conglomerate|83238|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Neogene|||inferred||Paleogene|||inferred|||||No|73334|||||||Basaltic boulder conglomerate and sandstone.|medium-coarse grained siliciclastic rock|||N||24-SEP-23
Vicary Creek Granodiorite|40844|||||Yes|Formation, beds|Reserved|Reserved|Reserved|||||||||intrusion|||||||||No|||McClenaghan M.|15-APR-04|||Northeast Tasmania near Boobyalla River. Published as the informally named Vicarys Creek Granite (Tasmanian Granites and associated mineralisation, 2005).|Granodiorite|acid intrusive rock|||Y||17-JAN-23
Victory Springs Formation|81676|||||Yes|Formation, beds|Reserved|Reserved|Defined|Arthur Metamorphic Complex|647|||Neoproterozoic|||inferred||Neoproterozoic|874|11||maximum depositional age|||TAS|Yes|||Everard, J.L. (MRT)|16-SEP-19|Forsyth, S., Cummings, G.|24-SEP-19|Proposed publications Keith and Folly 1:25000 maps (to be amended), Mulder et al. (in prep.)|Dominantly mudstone, phyllitic mudstone, siltstone, quartzite, carbonate (dolomite and magnesite), minor quartz-mica schists and rare amphibolite, with intervals of hematite-limonite-pyrite gossan.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Viola Limestone|19122|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|42203||||||Cambrian age?||carbonate sedimentary rock|||N||17-JAN-23
Wallace River Group|19256|||||Yes|Group, Suite|Formal|Other new published name|Briefly described||||||||||||||||||No|36788|||||||||||N||17-JAN-23
Wangerrip Group|19406|Wangerrip Formation|19404|||Yes|Group, Suite|Formal|Variation of published name|Redefined|||||Lutetian|||||Maastrichtian||||||200|VIC|No|48581|31036|||||Of Baker (1953) after Wangerrip Formation of Baker (1950). Gambier Basin. See also Lexicon. SJ54-12.|Shallow marine to continental deposits; contains phosphate materials. Thin oolitic deposits and a range of mudstones and sandstones.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Wardlaw Conglomerate|19454|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||deposition|||||||||No|66174|||||||||||N||17-JAN-23
Warneet Formation|19473|||||Yes|Formation, beds|Informal|Variation of published name|Mentioned|||||Neogene||||deposition|Cenozoic||||||||No|33358||||||Same as Warneet Sands, Warneet Beds of Victoria?|||||N||17-JAN-23
Warner Siltstone|40014|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||||||deposition|||||||||No|24548|||||||Siltstone with subordinate slate and subgreywacke.|siliciclastic sedimentary rock|||N||17-JAN-23
Wart Hill Pyroclastics|19546|Wart Hill pyroclastics|19547|||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Late Cambrian|||||Late Cambrian||||||||No|41142|||||||Massive pyroclastics and lavas associated with lensoid bodies (intrusives?) of fine-grained quartz porphyry and quartz-feldspar-porphyry.||||N||17-JAN-23
Waterfall Valley Siltstone|25606|Waterfall Valley Formation|19578|||Yes|Formation, beds|Formal|Variation of published name|Described|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||||No|36817||||||See also Waterfall Formation.||siliciclastic sedimentary rock|||N||17-JAN-23
Waterhouse Formation|19582|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|||||Quaternary||||deposition|Quaternary||||||||No|35466||||||Not to be confused with Waterhouse nomenclature of NT granites.|||||N||17-JAN-23
Waterloo Creek Group|19588|||||Yes|Group, Suite|Formal|Other new published name|Briefly described|||||Lower Ordovician|||||Late Cambrian||||||||No|41143|||||||Rhyolitic epiclastics, tuffaceous sandstones and black shale.||||N||17-JAN-23
Wedge River beds|19661|Wedge River Beds|19660|||Yes|Formation, beds|Informal|Variation of published name|Fully described|||||Late Precambrian|||||Neoproterozoic||||||||No|63167||||||See also Wedge River Beds.|Consists of metamorphosed and strongly deformed equivalents of boulder conglomerate, thin graded sandstone, mudstone and pebbly or cobbly, muddy sandstone.|metasedimentary siliciclastic rock|||N||17-JAN-23
Weld River Group|24566|||||Yes|Group, Suite|Formal|Resvd name published|Defined|||||Ediacaran|||||Cryogenian||||||5000|TAS|Yes|41908||Calver C.R.|05-JUL-85|||RefID:42227 has a confusing representation of the Weld River Group, stating that it comprises Annakananda Formation, Gomorrah , Devils Eye and Styx Dolomites; the legend for Figure 3 (p 22-23) however includes Lake Timke and Lots Wife Dolomites, and Picone Formation (possibly an older map with former nomenclature?)|Sequence of predominantly dolostone (shallow-marine, well-preserved oolitic + peloidal textures); upper unit of intercalated dolostone, diamictite, sandstone and mudstone, pebbly laminated siltstone; impersistent basal conglomerate and sandstone.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Wesley Vale Sand|19771|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Early Miocene||||deposition|Rupelian||||||75||No|33348||||||Age from GSA Special Publication 15, p360. Geological province: Devonport-Port Sorell Sub-basin.|Weakly consolidated sandstone.|siliciclastic sedimentary rock|organic rich sedimentary rock||N||17-JAN-23
West Arm Group|19773|||||Yes|Group, Suite|Formal|Other new published name|Defined|Lower Parmeener Supergroup|10795|||Kungurian|||||Sakmarian|||||||TAS|No|30887|30889|||||Age: Bernacchian to Lymingtonian (GSA Special Publication 15, p296)|Fossiliferous siltstone and fine sandstone.|siliciclastic sedimentary rock|||N||17-JAN-23
West Coast Granite|41360|West Coast granite|31332|||Yes|Group, Suite|Informal|Variation of published name|Briefly described|||||Neoproterozoic||||intrusion|Neoproterozoic|760|||||||No|50608||||||On King Island.|Granite|acid intrusive rock|||Y||17-JAN-23
West Coast lamprophyres|19783|||||Yes|Formation, beds|Informal|Variation of published name|Described|||||Lower Cretaceous|||inferred, geochemical correlation||Upper Jurassic|||inferred, geochemical correlation|||||No|33354||||||Locations from Mineral Resources of Tasmania (2021) 1:25K geology, and also (more approximately and generalised) from Sutherland and Corbett (1973). Age somewhere between Middle Devonian (age of youngest intruded sediment) and Late Mesozoic (age of similar dated rocks on King Island).|olivine-normative and quartz-normative (olivine) augite minettes with rare kersantite and vogesite, and locally common spessartite.|exotic composition igneous rock|||N||17-JAN-23
Westcott Argillite|19802|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Owen Group|34165|||Late Cambrian|||||Late Cambrian||||||||No|37045||||||Formerly of the "Rosebery Group" now reassigned to Owen Group based on Cambrian fossil evidence.|||||N||17-JAN-23
Western Volcano-Sedimentary Sequence|73265|||||Yes|Group, Suite|Informal|Variation of published name|Described|Mount Read Volcanics|13057|||Cambrian||||deposition|Cambrian||||||||No|63612||||||Also known as the "Western Sequence" section of Mount Read Volcanics. Flanks Central Volcanic Complex to the west.|Comprises lithiwacke, mudstone, siltstone, shale and subordinate intrusive rocks and lavas, commonly andesitic.|siliciclastic sedimentary rock|intermediate intrusive rock||N||17-JAN-23
Weston Mudstone|19845|Weston Formation|26997|||Yes|Formation, beds|Formal|Other new published name|Briefly described|Poatina Group|15348|||Kungurian||||deposition|Artinskian||||||9||No|34047||||||Age: Lymingtonian. Part of the Poatina Group; formerly in the Woodbridge Group as Weston Formation.|Calcareous siltstone; contains a fenestellid-rich bryozoan fauna.|siliciclastic sedimentary rock|||N||17-JAN-23
Whalers Bluff Formation|19858|||||Yes|Formation, beds|Formal|Other new published name|Defined|||||Pliocene||||deposition|Pliocene|4.35|||||130|VIC|No|30928|42827|||||Defined by Boutakoff and Sprigg 1953.|Coastal: sandy limestone, calcarenite, shell beds, marl.|carbonate sedimentary rock|siliciclastic sedimentary rock||N||17-JAN-23
Wherretts Chert Member|19867|||||Yes|Member, phase|Formal|Other new published name|Defined|Karmberg Limestone|9290|||Middle Ordovician||||deposition|Middle Ordovician|||||||TAS|No|30277|30277||||||Abundant chert nodules and irregular thin beds.|non-carbonate chemical or biochemical sedimentary rock|||N||17-JAN-23
Whip Spur agglomerate sequence|73376|||||Yes|Group, Suite|Informal|Other new published name|Briefly described|||||Cambrian|||||Cambrian||||||||No|35844|||||||||||N||17-JAN-23
White Spur Formation|25620|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Dundas Group|26529|||Undillan||||deposition|Undillan||||||3000||No|43241||||||Of Corbett and Lees (1987) for probable correlate in Howards Road area, of Judith Fm (Dundas Gp). Volcano-sedimentary sequence linking Dundas region to Mount Read Volcanics, with an interfingering relationship.|A thick, W-facing sequence of volcaniclastic sandstone, siltstone and mudstone; graded mass-flow units of volcaniclastic breccia and sandstone, up to 100m thick, dominate the lower part. Volcaniclastics are voluminous and crystal-rich.|acid volcanic rock|siliciclastic sedimentary rock||N||17-JAN-23
Whitehorses Beach Sandstone|19920|||||Yes|Formation, beds|Formal|Other new published name|Described|Spero Bay Group|27571|||Emsian||||deposition|Emsian||||||||No|43547||||||See also Whitehorse Beach Sandstone.|Well-sorted, cross-bedded quartz sandstone with minor siltstone and conglomerate. A fossiliferous bed near the top contains brachiopods, tentaculids and orthoconic cephalopods.|siliciclastic sedimentary rock|||N||17-JAN-23
Whyte River Complex|25622|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Early Cambrian|||||Early Cambrian|||||||TAS|No|41562||Everard J.L. (MRT) after Collins P.L.F. (1983 thesis)||Forsyth, S.|26-MAY-11|Of Rubenach (1973) and Collins (1983).  Variation on Whyte Schist? [CEBAug96] No. This unit near Mt Cleveland, Dundas Trough. May possibly be superseded by Deep Creek Volcanics (see Deep Creek Volcanics definition)|Volcanics - boninite (high Mg andesite), low Ti tholeiite.|intermediate volcanic rock|basic volcanic rock||N||17-JAN-23
Whyte Schist|19956|||||Yes|Formation, beds|Formal|Variation of published name|Described|Arthur Metamorphic Complex|647|||Neoproterozoic|744|15|||Neoproterozoic|744|22||||||No|45061||||||Rocky Cape Region. Consists of eastern and western sequences.||metamorphic rock|||N||17-JAN-23
Wickham Complex|78878|||||Yes|Group, Suite|Informal|Other new published name|Mentioned|||||Neoproterozoic|760|12|||Neoproterozoic||||||||No|68241||||||A northern King Island unit.  Name only used in heading. May not be intended as formal name.|||||Y||17-JAN-23
Wierah Formation|24104|||||Yes|Formation, beds|Formal|Other new published name|Fully described|Wurawina Supergroup|24587|||Ordovician||||deposition|Furongian||||||||No|40714||R.F.Berry|01-DEC-81|||Biostratigraphic correlate of lower part of Wurawina Supergroup.|Comprises mainly thick flat-bedded conglomerate with rare sandstone and siltstone layers 5mm thick, with interlayered sandstone and conglomeratic sandstone up to 1m thick.|siliciclastic sedimentary rock|||N||17-JAN-23
Williamsford Volcanics|20089|||||Yes|Formation, beds|Formal|Other new published name|Mentioned|||||||||eruption|||||||||No|37045|||||||||||N||17-JAN-23
Wilson River Ultramafic Complex|20166|||||Yes|Group, Suite|Formal|Other new published name|Described|||||Early Cambrian|||||Early Cambrian|514|5|isotopic, U/Pb-Pb/Pb ion probe|||||No|41795||||||See also Wilson River complex and Wilson River Complex. Includes layered pyroxenite-dunite and layered dunite-harzburgite ultramafic associations. Geological Province: Dundas Trough.|Includes layered pyroxenite-dunite and layered dunite-harzburgite ultramafic associations.|ultramafic intrusive rock|||N||17-JAN-23
Wilsonia Volcanics|20171|||||Yes|Formation, beds|Formal|Variation of published name|Mentioned|||||||||eruption|||||||||No|42891|||||||||||N||17-JAN-23
Wings Sandstone|27061|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Cryogenian|914|44|isotopic|deposition|Tonian||||||||No|39235||A.V.Brown|27-MAY-77||||Massive (structureless) fine-grained quartzarenite.|medium-coarse grained siliciclastic rock|||N||17-JAN-23
Winkleigh Sandstone|25635|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|Lower Parmeener Supergroup|10795|||Permian||||deposition|Permian||||||||No|31195||||||See also description in Frankford 1 mile series Explanatory Notes (1981) - p11.|Coarse, moderately friable sandstone with numerous pebbles; fossils are present.|siliciclastic sedimentary rock|||N||17-JAN-23
Wombat Flat Granite|20401|Wombat Flat Adamellite|33458|||Yes|Formation, beds|Informal|Other new published name|Briefly described|||Meredith Suite|40889|Upper Devonian|373.2|1.9||intrusion|Upper Devonian|373.2|1.9|isotopic, U/Pb-Pb/Pb ion probe|||||No|42726||||||Formal name not intended by Chappell et al (1991) but usage probably overrides 'adamellite' nomenclature. See also Wombat Flat Adamellite, Meredith Granite/Adamellite. NE part of the Meredith Batholith, previously been termed the Meredith mafic phase.|I-type biotite monzogranite.|acid intrusive rock|||Y|I-type|17-JAN-23
Woodside Formation|20529|||||Yes|Formation, beds|Formal|Other new published name|Described|Liffey Group|27464|||Permian||||deposition|Permian||||||||No|24549|||||||Quartz mica sandstone with several black shale bands|medium-coarse grained siliciclastic rock|fine grained siliciclastic rock||N||17-JAN-23
Woody Island Siltstone|20535|||||Yes|Formation, beds|Formal|Variation of published name|Fully described|Lower Parmeener Supergroup|10795|||Sakmarian||||deposition|Asselian||||||208||No|34298||||||See also Woody Island Formation -  both names used interchangeably throughout 2000 Bulletin 71 (TGS) - "The petroleum potential of onshore Tasmania: a review".  Age: Tamarian (GSA Special Publication 15, 1989, p296).|Carbonaceous pyritic siltstone passing up into richly fossiliferous siltstone, sandstone and minor limestone.|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Woolnorth Tuff|83236|||||Yes|Formation, beds|Formal|Other new published name|Briefly described|||||Neogene|||inferred||Paleogene|||inferred|||||No|73334|||||||Subaqueously deposited, bedded vitric tuff, with well-developed climbing-ripple lamination in some outcrops.|igneous volcanic rock|||N||17-JAN-23
Wurawina Supergroup|24587|||||Yes|Supergroup|Formal|Resvd name published|Defined|||||Lower Devonian|||||Late Cambrian|||||||TAS|Yes|40708|40708|M.R.Banks|21-FEB-86|Tasmania SNSC|10-JUL-86|Comprising the Denison Group, Gordon Group and Eldon or Tiger Range Groups.  In western Tasmania. See also the misspelt Wurawira Supergroup.|Non-marine siliciclastic conglomerate and marine shelf sequences. Succession ranges from well-sorted siliceous sandstone and conglomerate up through less siliceous sandstone and siltstone (Denison Group) to shallow water limestone (Gordon Group).|siliciclastic sedimentary rock|carbonate sedimentary rock||N||17-JAN-23
Wybalenna Granodiorite|70300|Wybalenna Granite|20705|||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||Wybalenna Suite|31658|Lower Devonian|400|4||intrusion|Lower Devonian|400.5|4|isotopic, U/Pb-Pb/Pb ion probe|||||No|61723||||||One of the Furneaux Islands granites on Flinders Island. See also the informal Wybalenna Granite.|I-type biotite-hornblende granodiorite|acid intrusive rock|||Y|I-type|17-JAN-23
Wybalenna Suite|31658|||||Yes|Group, Suite|Formal|Variation of published name|Briefly described|||||Carboniferous|||||Devonian||||||||No|42726|||||||I-type granites and granodiorites. Contains hornblende, some minor clinopyroxene; mafic enclaves.|acid intrusive rock|||Y|I-type|17-JAN-23
Wynyard Tillite|27023|||||Yes|Formation, beds|Formal|Variation of published name|Described|Parmeener Supergroup|14900|||Permian||||deposition|Pennsylvanian||||||600||No|24547||||||Not to be confused with the Wynyard nomenclature of Queensland.|Diamictite, conglomerate, sandstone, pebbly mudstone and rhythmite.|sedimentary rock|||N||17-JAN-23
Yarra Creek Shale|74646|||||Yes|Formation, beds|Formal|Other new published name|Defined|Grassy Group|7717|||Ediacaran|575|3|inferred, intrusive relationship|deposition|Ediacaran|||||15|150|TAS|Yes|62516||Direen, N., Calver, C||Forsyth, S.|27-NOV-08|Includes interbedded tuffs, lavas and pyritic layers which have been identified as "an intermingled transition into the overlying volcanic succession" of Skipworth Subgroup (Calver et al 2004). Stratigraphically linked to Cumberland Creek Dolostone by presence of microbial mat facies in both units.|Uniform, poorly bedded, weakly fissile shale (mudstone) with rare, thin beds of carbonate and of mafic-volcanic sandstone. Transitions from yellow-brown or grey-green with distinctive black shale beds, upward to red shale.|siliciclastic sedimentary rock|igneous volcanic rock||N||17-JAN-23
Yarrow Creek Mudstone|75365|Bellingham Formation|1426|||Yes|Formation, beds|Formal|Resvd name published|Defined|Panama Group|36814|||Llandovery|||inferred, lithostratigraphic correlation|deposition|Llandovery|||inferred, underlying unit|||2000|TAS|Yes|67503|67493|Seymour, D. (MRT)|08-JUL-09|Forsyth, S.|07-SEP-10|Weymouth 1:25 000 map sheet area (part of 8315). Dominantly thin-bedded mudstone, with subordinate cross-laminated siltstone. Probable Silurian age. This is one of three proposed new Formations replacing the interval previously occupied by the Bellingham Formation. It is proposed to retire usage of the Bellingham Formation name. Published in Mineral Resources Tasmania publications arising from TasExplore Project (late 2009 - 2010). Possible AJES paper(s) - 2010?. See also Yarrow Creek Siltstone.|Dominantly thin-bedded mudstone, with subordinate cross-laminated siltstone.|fine grained siliciclastic rock|||N||17-JAN-23
Yolande River Sequence|73266|||||Yes|Group, Suite|Formal|Variation of published name|Described|Mount Read Volcanics|13057|||Drumian|||||Drumian||||||||No|64395||||||See also the informal Yolande River sequence.|Local basal basalt; sandstones and mudstones; volcaniclastic sandstone, siltstone and mudstone; porphyritic sills and lavas.|siliciclastic sedimentary rock|||N||17-JAN-23
Zeehan Tillite|21084|||||Yes|Formation, beds|Formal|Variation of published name|Briefly described|||||Pennsylvanian||||deposition|Pennsylvanian||||||||No|31648|||||||||||N||17-JAN-23
Zig Zag Hill Formation|29475|Jukes Formation|9058|||Yes|Formation, beds|Formal|Other new published name|Defined|Tyndall Group|18756|||Late Cambrian||||deposition|Middle Cambrian||||||500|TAS|Yes|22551||White M.J.|17-FEB-95|Calver, C.|21-JUL-95|Replaces Jukes Formation (wrongly correlated with Jukes Conglomerate). See nomenclatural details in UNIT DEFINITION for Comstock Formation. Considered to be a correlate of Dora Conglomerate.|Comprises polymict, volcaniclastic boulder to pebble grade conglomerate, graded-bedded sandstone and rare interlaminated mudstone.|siliciclastic sedimentary rock|||N||17-JAN-23
alkali basalt, dolerite #84028|84028|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Neoproterozoic|||||Mesoproterozoic||||||||No|||||||Within Burnie and Oonah Formations; includes Cooee Dolerite. Used in Tasmanian 250K seamless geology.|Alkali basalt and dolerite.||||Y||14-SEP-23
alkaline basalt - King Island 83889|83889|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||unknown|||||Cryogenian|||inferred, underlying unit|||||No|||M. Buddee|12-APR-23|||To be used in GA alkaline rocks data compilation and other products. Younger than Cryogenian Granites.|Alkalic dolerite dykes, generally feldspar-phyric.|basic volcanic 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
amphibolite 37516|37516|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Arthur Metamorphic Complex|647|||Neoproterozoic|||||Neoproterozoic||||||||No|||||||Lithology recorded is that to be used for unnamed subdivision of Arthur Metamorphic Complex as used on Tasmania 1:1million geological map, National Maps Project.|Amphibolite|metamorphosed basic igneous rock|||N||17-JAN-23
basalt dykes 78034|78034|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Ordovician||||intrusion|Cambrian||||||||No|||||||Unnamed unit used in the Mafic-Ultramafic Event Series dataset 2013. Used in 1:250 000 scale digital Surface Geology of Tasmania.|Tholeiitic basalt dykes.|basic volcanic rock|||N||17-JAN-23
boninitic lava 40978|40978|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||||||intrusion|||||||||No|||||||Described in Brown A.V. 1986. Geology of the Dundas-Mt Lindsay-Mt Youngbuck region. Bull. Rep. Geol. Surv. Tasm. 62.|Boninitic lavas.|intermediate volcanic rock|||N||17-JAN-23
chloritic schist 37515|37515|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Arthur Metamorphic Complex|647|||Neoproterozoic|||||Neoproterozoic||||||||No|||||||Lithology recorded is that to be used for unnamed subdivision of Arthur Metamorphic Complex as used on Tasmania 1:1million geological map, National Maps Project.|Chlorite schist with minor phyllite, dolomite and magnetite|metamorphosed basic igneous 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
dolerite 74215|74215|||||Yes|Formation, beds|Unnamed|Unnamed published|Briefly described|||||Neoproterozoic||||intrusion|Neoproterozoic||||||||No|||Whitaker, A. (GA)|22-APR-08|||Unnamed Neoproterozoic dolerite dykes|Unnamed mafic dykes; medium to coarse grained ophitic to subophitic dolerite and metadolerite, tholeiitic dolerite|basic intrusive rock|||Y||17-JAN-23
dolostone 41148|41148|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Grassy Group|7717||||||||||||||||No|50327|||||||||||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 to intermediate volcanics 37497|37497|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Mount Read Volcanics and correlates|37483|||Late Cambrian||||eruption|Middle Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project. Includes Crown Hill Andesite, Lobster Creek Porphyry.|Felsic to intermediate volcanic and volcaniclastic rocks. Some intrusive rocks|acid volcanic rock|intermediate volcanic rock||N||17-JAN-23
granite 37500|37500|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian||||intrusion|Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania, South Australia 1:1million geological map, National Maps Project.|Undifferentiated acid intrusives|acid intrusive 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
limestone 40151|40151|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene||||deposition|Cenozoic||||||||No|||||||Lithology referring to an unnamed unit to be used for Australian 1:1million geological map, National Maps Project.|Limestone|carbonate sedimentary rock|||N||17-JAN-23
lower conglomerate member (TAS) 75532|75532|||||Yes|Member, phase|Informal|Unnamed published|Described|Owen Conglomerate|27530|||Late Cambrian||||deposition|Late Cambrian|||||55|1000||No|24601||||||Of Owen Conglomerate|Pink to pale-brown boulder to pebble conglomerate, sandstone and minor mudstone|siliciclastic sedimentary rock|||N||17-JAN-23
mafic intrusives 42017|42017|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Devonian||||intrusion|Devonian||||||||No|||||||Lithology referring to an unnamed unit to be used for the Australia 1:1 million geological map, National Maps Project.|Dolerite, gabbro, diorite, quartz diorite, monzodiorite, quartz monzodiorite, tonalite; rare lamprophyre|basic intrusive rock|||Y||17-JAN-23
mafic volcanic rocks 38495|38495|||||Yes|Group, Suite|Unnamed|Unnamed published|Mentioned|||||Cenozoic||||eruption|Cenozoic||||||||No|||||||Unit is to be used as part of a "standard set" of symbols for National Maps Project.  Map symbol: Czb.|Volcanic rocks, predominantly mafic; basalt, trachyte, trachybasalt, trachyandesite, leucitite, basanite, nephelinite, limburgite, rhyolite, tuff and high level intrusives; rare volcaniclastic sediments|basic volcanic rock|||N||17-JAN-23
mafic volcanics 37496|37496|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Mount Read Volcanics and correlates|37483|||Late Cambrian||||eruption|Middle Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project. Includes Que-Hellyer basalts, Lynch Creek Basalt, Beulah Formation, dolerite at Mount Charter.|Shoshonitic, basaltic to andesitic volcanics. Dolerite and Gabbros.|basic volcanic rock|||N||17-JAN-23
middle conglomerate member (TAS) 75531|75531|||||Yes|Member, phase|Informal|Unnamed published|Described|Owen Conglomerate|27530|||Late Cambrian||||deposition|Late Cambrian|||||20|240||No|24601|||||||Poorly sorted coarse-grained pebble and cobble conglomerate succession, with minor interbedded sandstone and siltstone.|siliciclastic sedimentary rock|||N||17-JAN-23
middle sandstone member (TAS) 75530|75530|||||Yes|Member, phase|Informal|Unnamed published|Described|Owen Conglomerate|27530|||Furongian||||deposition|Late Cambrian||||||||No|24601||||||May be equivalent to Newton Creek Sandstone Member (also of Owen Conglomerate)|Conglomerate, sandstone and mudstone succession.|siliciclastic sedimentary rock|||N||17-JAN-23
phyllite 37518|37518|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Arthur Metamorphic Complex|647|||Neoproterozoic|||||Neoproterozoic||||||||No|||||||Lithology recorded is that to be used for unnamed subdivision of Arthur Metamorphic Complex as used on Tasmania 1:1million geological map, National Maps Project.|Phyllite with minor pelite schist, foliated quartzite and dolomite, and rare conglomerate|metasedimentary rock|||N||17-JAN-23
quartz-feldspar porphyry 37499|37499|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Mount Read Volcanics and correlates|37483|||Late Cambrian||||intrusion|Middle Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project.|Quartz-feldspar porphyry - dominantly intrusive.|acid intrusive rock|||Y||17-JAN-23
quartz-mica schist 37517|37517|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Arthur Metamorphic Complex|647|||Neoproterozoic|||||Neoproterozoic||||||||No|||||||Lithology recorded is that to be used for unnamed subdivision of Arthur Metamorphic Complex as used on Tasmania 1:1million geological map, National Maps Project. Includes Keith Schist and correlates.|Quartz-mica-schist, quartzite, phyllite and rare dolomite (Keith Schist and correlates)|metasedimentary siliciclastic rock|||N||17-JAN-23
sandstone 41146|41146|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||||||deposition|||||||||No|50327||||||Unnamed Proterozoic turbiditic sandstone unit underlying Grassy Group on western side of King Island|Turbiditic metasediments, predominantly quartz-muscovite schist and quartzite|siliciclastic sedimentary rock|||N||17-JAN-23
sandstone and conglomerate 37498|37498|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Mount Read Volcanics and correlates|37483|||Late Cambrian||||deposition|Middle Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project. Includes Sticht Range beds, Miners Ridge Sandstone, Animal Creek Greywacke.|Dominantly siliceous sandstone and conglomerate of partly Precambrian provenance (including Sticht Range Beds, Miners Ridge Sandstone and Animal Creek Greywacke)|siliciclastic sedimentary 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 37519|37519|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|Mount Read Volcanics and correlates|37483|||Late Cambrian||||deposition|Middle Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project.|Marine sedimentary sequences, minor volcanics in places|siliciclastic sedimentary rock|||N||17-JAN-23
sediments 38484|38484|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Quaternary||||deposition|Quaternary||||||||No|||||||Unit to be used as part of a "Standard set" of map symbols for National Maps Projects. Map Symbol: Q. This unit is to be used as a last resort when no other lithology can be determined.|Quaternary sediments, undivided|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 42025|42025|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Neogene||||deposition|Cenozoic||||||||No|||||||Lithology referring to an unnamed unit to be used for the Australia 1:1 million geological map, National Maps Project.|Undifferentiated sediments, sandstone, conglomerate, gravel, siltstone, mudstone, silcrete; commonly poorly consolidated, ferruginised or silicified; includes Armidale beds and Gibsonvale Formation|medium-coarse grained siliciclastic rock|||N||17-JAN-23
shale 41149|41149|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||||||deposition|||||||||No|50327|50327|||||||siliciclastic sedimentary rock|||N||17-JAN-23
siltstone 41147|41147|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||||||deposition|||||||||No|50327||||||Unnamed siltstone unit underlying Grassy Group, eastern side of King Island|Relatively unmetamorphosed shale, siltstone and fine grained muscovitic quartz sandstone|siliciclastic sedimentary rock|||N||17-JAN-23
tholeiitic and boninitic lavas 37502|37502|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Early Cambrian||||eruption|Early Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project.|Low-Ti tholeiitic and boninitic lavas.|basic volcanic rock|||N||17-JAN-23
tholeiitic lava 40977|40977|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||||||intrusion|||||||||No|||||||Described in Brown A.V. 1986. Geology of the Dundas-Mt Lindsay-Mt Youngbuck region. Bull. Rep. Geol. Surv. Tasm. 62.|Low-Ti tholeiitic lavas.|basic volcanic rock|||N||17-JAN-23
tonalite 37501|37501|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian||||intrusion|Cambrian||||||||No|||||||Lithology recorded for this unnamed unit is that to be used for Tasmania 1:1million geological map, National Maps Project.|Tonalite and associated rocks|acid intrusive rock|||Y||17-JAN-23
turbidite sequence 40988|40988|||||Yes|Group, Suite|Informal|Unnamed published|Not recorded|Mathinna Supergroup|36812||||||||||||||||No|||||||Informal subdivision of the Mathinna Supergroup used by McClenaghan, M.P., Calver, C.R. (comp.). 1994. in Geological Atlas 1:250,000 digital series. Geology of Northeast Tasmania. Tasmanian Geological Survey. Map symbol: ODq.|Micaceous quartzwacke turbidite sequences.||||N||17-JAN-23
turbidite sequence 40989|40989|||||Yes|Group, Suite|Informal|Unnamed published|Not recorded|Mathinna Supergroup|36812|||Ordovician|||||Ordovician||||||||No|||||||Informal subdivision of the Mathinna Supergroup used by McClenaghan, M.P., Calver, C.R. (comp.). 1994. in Geological Atlas 1:250,000 digital series. Geology of Northeast Tasmania. Tasmanian Geological Survey. Map symbol: ODp.|Dominantly pelitic turbidite sequences.|siliciclastic sedimentary rock|||N||17-JAN-23
ultramafic rock 69569|69569|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Early Cambrian||||intrusion|Early Cambrian||||||||No|||Ollie Raymond||||Lithology referring to an unnamed unit to be used for Tasmanian 1:1 million geological map, National Maps Project.  Includes Beaconsfield Ultramafic Complex|Peridotite, serpentinite and associated rocks. Includes Beaconsfield Ultramafic Complex|ultramafic igneous rock|metamorphosed ultramafic rock||N||17-JAN-23
undivided Early Paleozoic rocks 76522|76522|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Lower Devonian|400|||deposition|Lower Ordovician|490|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Undivided Cambrian to Devonian rocks|sedimentary rock|||N||17-JAN-23
undivided Neoproterozoic to Cambrian rocks 76666|76666|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||Cambrian|525||||Neoproterozoic|750|||||||No|||||||Unnamed unit used in the 1:2.5 million scale Geology of Australia dataset|Undivided Neoproterozoic to Cambrian rocks||||N||17-JAN-23
upper sandstone member (TAS) 75529|75529|||||Yes|Member, phase|Informal|Unnamed published|Described|Owen Conglomerate|27530|||Late Cambrian||||deposition|Late Cambrian|||||96|550||No|24601|||||||Variably thick succession of pink to grey well-sorted and thinly bedded sandstone, siltstone, poorly sorted pebble conglomerate and minor pebble breccia.|siliciclastic sedimentary rock|||N||17-JAN-23
volcanics 41150|41150|||||Yes|Formation, beds|Unnamed|Unnamed published|Mentioned|||||||||eruption|||||||||No||||||||||||N||17-JAN-23
