Stratno | Stratigraphic Name | Category | Contents | Last update 
1228|Barwo Sand Member|Name source|Parish of Barwo, grid reference 325554, Bendigo 1:250 000 Sheet area.|16-MAY-23
1228|Barwo Sand Member|Unit history|Lawrence (1966 and 1975) may have included part of this member in his Mayrung, Quaimong, Katandra and Kialla Members and in his Widgelli Pedoderm.|16-MAY-23
1228|Barwo Sand Member|Type section locality|Mines Department borehole Barwo 1, grid reference 325554, Bendigo 1:250 000 Sheet area. The hole was drilled in 1972 by a percussion rig and samples, a gamma log, a spontaneous potential long normal log and a spontaneous potential short normal log are kept by the Mines Department. The description of the type section is as follows:  Top: From 4.9 to 5.8 ????|16-MAY-23
1228|Barwo Sand Member|Extent|The unit occurs in the subsurface over much of the alluvial plains of the Campaspe and Goulburn rivers. It is exposed at various places along the banks of these rivers and in gravel pits on the adjacent alluvial plains.|16-MAY-23
1228|Barwo Sand Member|Thickness range|Up to 18 metres but usually 6 to 10 metres.|16-MAY-23
1228|Barwo Sand Member|Lithology|Unconsolidated to poorly consolidated, feldspathic and micaceous sand and clayey sand; light brown, reddish brown and grey in colour; fine sand to gravel sized and often showing upward fining cycles. Cross-bedding sometimes occurs.|16-MAY-23
1228|Barwo Sand Member|Relationships and boundaries|It occurs within the Shepparton Formation (Lawrence 1975) at depths of between 1 and 25 metres below the ground surface and is overlain, underlain and intertongues with clays of the same formation. On a regional scale, upper and lower contacts are conformable but on a local scale, lower contacts are disconformable as the sands are often channel fills. The deposits have a shoe-string sand type form but in many areas the sand bodies coalesce into sheets. The unit has a low basinwards dip, parallel to the present day land surface.|16-MAY-23
1228|Barwo Sand Member|Age reasons|Bowler 1967 obtained radio-carbon dates on this member ranging from 20,900 +/- 500 years B.P. to 30,600 +/- 1300 years B.P. The maximum depth sampled was 9 metres below ground level. Age determinations on deeper parts of the unit are lacking.|16-MAY-23
1228|Barwo Sand Member|Comments|Lawrence (1966 and 1975) subdivided the upper part of the Shepparton Formation into members "based on soil stratigraphic units and sedimentary patterns" (Lawrence 1975, p 53). These are not lithological units but units based on soil horizons which transgress lithological boundaries. The use of the lithological term "member" is therefore considered to be inappropriate when applied to these units. Although no overlap of Lawrence's units with the Barwo Member occurs at the formers' type locality, this may be so at other places, as the definition of Lawrence's members implies that they include all types of sediments deposited from "leveed" streams. At least some of the sands of the Barwo Member were deposited from the same "leveed" streams which deposited the overlying clays and also the Barwo Member occurs at depths of as little as 1 metre which is well within the depth range of the soil stratigraphic units at their type locality.|16-MAY-23
1228|Barwo Sand Member|References|Bowler J.D., 1967a. Quaternary chronology of Goulburn Valley sediments and their correlation in southeastern Australia. J. geol. Soc. Aust. 14 (2) p.287-292. Lawrence C.R., 1966a. Cainozoic stratigraphy and structure of the Mallee Region, Victoria. Proc. R. Soc. Vict. 79(2) p 517-553.|16-MAY-23
1228|Barwo Sand Member|Name first published by|Tickell S.J., 1977|16-MAY-23
76739|Beaumaris Sandstone|General description|The Beaumaris Sandstone is an extensively bio-turbated sequence of marine sands and silts; it comprises a basal phosphatic nodule layer, representing a hard ground, which includes an extensive assemblage of vertebrate teeth and bones (Ref). The lower horizons are calcareous, with mollusc and echinoid horizons (Lovenia woodsi) but become progressively non-calcareous, with ferruginous horizons higher in the sequence.|16-MAY-23
76739|Beaumaris Sandstone|Proposed publication|Proceedings of the Royal Society of Victoria|16-MAY-23
76739|Beaumaris Sandstone|Comments|NOTE: This is a replacement name for the Black Rock Sandstone STRATNO: 1832 (occupied, NSW STRATNO 29504 and STRATNO 28374).|16-MAY-23
24176|Bellbridge Gneiss|Name source|Settlement of Bellbridge at the east end of Bethanga Bridge (grid ref. 055054) on the Hume 1:50 000 Sheet.|16-MAY-23
24176|Bellbridge Gneiss|Type section locality|Exposures in cuttings on the road between Bellbridge and 'Bethanga Park' homestead (grid ref. 053050 to 074974).|16-MAY-23
24176|Bellbridge Gneiss|Extent|As an irregular, north trending zone between Bellbridge and 'Bethanga Park' homestead, in the western half of the Hume 1:50 000 Sheet.|16-MAY-23
24176|Bellbridge Gneiss|Thickness range|Indeterminate.|16-MAY-23
24176|Bellbridge Gneiss|Lithology|A medium to coarse grained porphyritic gneiss, comprising a quartz-feldspar groundmass in which occur schleiren of biotite and orthoclase porphyroblasts up to 3 cm long. The porphyroblasts vary between being roughly aligned and randomly oriented.|16-MAY-23
24176|Bellbridge Gneiss|Relationships and boundaries|Gradational into Bethanga Gneiss to the east. Western limit beneath Lake Hume, probably faulted against Hawkesview Granite to the west and Rubyview Gneiss to the southwest.|16-MAY-23
24176|Bellbridge Gneiss|Age reasons|These gneisses form part of a belt of regionally metamorphosed rocks which grade eastwards into unmetamorphosed sediments. Graptolites of Eastonian to Gisbornian age have been recorded from the sediments 2 km from Walwa (50 km east of the gneiss), and on this basis the Bellbridge Gneiss has been assigned a Late Ordovician age.|16-MAY-23
24176|Bellbridge Gneiss|References|Joplin G.A., 1947. Petrological studies in the Ordovician of NSW. IV. Northern extension of north-east Victorian metamorphic complex. Proc. Linn. Soc. NSW 72, p87 (01/31645)|16-MAY-23
24192|Bonnie Doon Formation|Name source|Bonnie Doon town (985015, Alexandra, 1:100 000).|16-MAY-23
24192|Bonnie Doon Formation|Type section locality|North shore of Lake Eildon (939023 to 977020, Alexandra).|16-MAY-23
24192|Bonnie Doon Formation|Thickness range|At least 2500 m, type section.|16-MAY-23
24192|Bonnie Doon Formation|Lithology|Quartz sandstone, siltstone, shale and rare limestone conglomerate.|16-MAY-23
24192|Bonnie Doon Formation|Age reasons|This formation is the oldest exposed in the area and outcrops west of Dry Creek Road (Bonnie Doon to Tallangallook Rd on Fig. 1) along the Mt Easton Anticlinorium. The base is unexposed but the top is marked by the incoming of conglomerates and lithic sandstones of the Glen Creek Lithic Sandstone above discontinuous dark shales.  The formation consists of a series of alternating massively bedded, light grey quartz sandstones and poorly bedded, dark green-grey mudstones and shales. Cross bedding (up to 2 cm) and graded bedding are common, while flame structures and ripple marks are found locally.  The quartz sandstones weather to a red-orange colour in contrast to the brown-green weathered mudstones. Outcrop is poor except in the more massive sandstones.  On lithological similarities and general stratigraphy, the Bonnie Boon Formation is correlated with the Bullung Siltstone, Sinclair Valley Sandstone (both Middle-Late Silurian), Whitelaw Siltstone, Eildon Sandstone and Wilsons Creek Shale (all Early Devonian) of Thomas (1947) and VandenBerg and Garratt (1976). Quartz sandstone outcropping 1.5 km west of Bonnie Doon in the core of the Mt Easton Anticlinorium may be equivalent to the McAdam Sandstone of VandenBerg and Garratt. This unit does not outcrop north of Lake Eildon.|16-MAY-23
3194|Bushy Creek Granite|Name source|Bushy Creek, a tributary of the Hopkins River, Victoria.|16-MAY-23
3194|Bushy Creek Granite|Type section locality|Bushy Creek, on the Glenthompson-Hexham road.|16-MAY-23
3194|Bushy Creek Granite|Description at type locality|Deeply weathered grey granite, locally foliated and intensely sheared.|16-MAY-23
3194|Bushy Creek Granite|Extent|Exposed over an area of 150 km2, about 5 km south of Glenthompson, Victoria.|16-MAY-23
3194|Bushy Creek Granite|Relationships and boundaries|Intrusive into sandstones, shales and low grade metamorphics of probable Upper Cambrian-very low Ordovician age.|16-MAY-23
3194|Bushy Creek Granite|Age reasons|Age uncertain.|16-MAY-23
3194|Bushy Creek Granite|Proposed publication|Geology of Victoria. Geol. Soc. Aust. 1976|16-MAY-23
24215|Carrajung Volcanics|Name source|Township of Carrajung; grid reference 740530, Carrajung 1:50 000 map sheet.|16-MAY-23
24215|Carrajung Volcanics|Type section locality|A section through basalt, tuff and volcanogenic sediment is exposed for 800 m along the Balook-Yarram road, from 677417-682417 (Carrajung 1:50 000 map sheet).|16-MAY-23
24215|Carrajung Volcanics|Extent|The unit is exposed on the flanks of the South Gippsland Highlands (Balook Block), from Koornalla-Willung-Staceys Bridge, and capping the highlands in the Balook-Blackwarri area. It is intersected in bores to north, east and south of the Balook Block.|16-MAY-23
24215|Carrajung Volcanics|Thickness range|The unit ranges up to a thickness of 150 m in bores, but is generally 40-80 m thick.|16-MAY-23
24215|Carrajung Volcanics|Lithology|Titanaugite basalt, olivine basalt, tuff, and volcanogenic sandstone, siltstone and claystone.|16-MAY-23
24215|Carrajung Volcanics|Relationships and boundaries|The unit is underlain by the Yarram Formation of Middle-Late Palaeocene age, or Strzelecki Group of late Early Cretaceous age. It is overlain by Traralgon Formation, of Middle Eocene-Oligocene age or Haunted Hill Gravel of Pliocene age.|16-MAY-23
24215|Carrajung Volcanics|Age reasons|The unit is assigned a Late Paleocene age on the basis of K-Ar dates of 57 and 55 my, from Balook and Jack River.|16-MAY-23
24215|Carrajung Volcanics|Comments|The unit previously referred to as Older Volcanics or Thorpdale Volcanics, has been defined and renamed in order to avoid confusion with the Oligocene-Early Miocene Thorpdale Volcanics which outcrop further west.|16-MAY-23
5051|Curlip Gravels|Name source|The gravels are near Orbost but it would be misleading if the unit was called the Orbost Gravels as Orbost is situated on the Tertiary and the name Orbost is preoccupied (Orbost Granite). The gravels are only found in the last fifteen miles of the Snowy River as it comes out onto the flats.  Lake Curlip is at the southern end of this stretch of the river on the same flats.|16-MAY-23
5051|Curlip Gravels|Type section locality|The Curlip Gravels are found in C.R.B. bore numbers: 1237640 Ashby's Gulch A6; 1238130 Ashby's Gulch A13; 1238480 Ashby's Gulch A18; 1239180 Ashby's Gulch A28; 1240220 Watts Gulch W0; 1240360 Watts Gulch W2; 1240570 Watts Gulch W5; 1240913 Watts Gulch W10; 1240920 Watts Gulch W10 (private contractor); and from penetrometer results, nos. - 1237990; 1238410; 1238550; 1239600.  A cross-section and location are in my Honours Thesis in the Geography Dept, Melbourne University , 1972.  Location is also shown on C.R.B. drawings, nos. 147231, 2, 3, 4, 5.  The map grid reference is 37degrees 44'S, 148degrees28'E.|16-MAY-23
5051|Curlip Gravels|Extent|The Gravels are proven along a line of section by Country Roads Board drilling and also by local drillers north and south of this section on the flats.|16-MAY-23
5051|Curlip Gravels|Thickness range|The maximum thickness is 42'6".  The minimum thickness is 27'  with the average thickness approximately 35'.|16-MAY-23
5051|Curlip Gravels|Lithology|The Gravels have a mean grain size of 1.5 0 with varying lithologies of the grains e.g. siltstone, quartz, sandstone. Clay is also present.|16-MAY-23
5051|Curlip Gravels|Relationships and boundaries|The gravel grades upwardly into sand mainly, and sometimes silty sand, clayey sand or silt. Underlying  it is a sand and clay layer resting on the Ordovician (seen only in W.10).|16-MAY-23
5051|Curlip Gravels|Age reasons|Presumed Quaternary. There is further Quaternary material i.e. clay and sand under the gravels before the Pre-Quaternary strata is reached I.e. Ordovician.|16-MAY-23
5229|Darraweit Guim Siltstone|Name source|Township of Darraweit Guim, 45 km N of Melbourne, Melbourne 1:250 000 Sheet.|16-MAY-23
5229|Darraweit Guim Siltstone|Type section locality|In Ben Dhui Creek, grid ref. 11725-60300 to 11875-60450 (NB. this section includes outcrop of underlying Bolinda Shale(. (Bolindavale 1:250 000 Sheet).|16-MAY-23
5229|Darraweit Guim Siltstone|Extent|The unit is exposed on several major anticlines in Deep Creek and its tributaries, near Darraweit Guim.|16-MAY-23
5229|Darraweit Guim Siltstone|Thickness range|About 20 m.|16-MAY-23
5229|Darraweit Guim Siltstone|Lithology|Massive to finely banded coarse siltstone, black when fresh, with rare bioturbation and very prominent fracture cleavage.|16-MAY-23
5229|Darraweit Guim Siltstone|Relationships and boundaries|Contact with underlying Bolinda Shale is assumed to be conformable but is usually faulted in outcrop (conformable in type section) - marked by rapid change from black shale to black siltstone. Contact with overlying Deep Creek Siltstone is similar, marked by change from Black siltstone to grey thin-bedded siltstone and sandstone with much more bioturbation.|16-MAY-23
5229|Darraweit Guim Siltstone|Age reasons|Age is close to the Ordovician-Silurian boundary. The underlying Bolinda Shale contains a rich late Bolindian graptolite fauna correlating with the British Zone of Dicellograptus anceps. The Darraweit Siltstone itself contains abundant disarticulated remains of the trilobite Dalmanitina (Dalmanitina) darraweitensis Campbell and some shelly fossils, as well as rare Glyptograptus of the G. tamariscus group, and Climocograptus. Oldest fossils in the overlying Deep Creek Siltstone are early Llandoverian graptolites.|16-MAY-23
24942|Echuca Formation|Name source|Parish of Echuca North, grid reference 277540, Bendigo 1:250 000 sheet area.|16-MAY-23
24942|Echuca Formation|Unit history|Lawrence (1975, fig 90) tentatively included these beds in his "Torrumbarry Clay" unit.|16-MAY-23
24942|Echuca Formation|Type section locality|Mines Department borehole Echuca North 1, grid reference 277540. The hole was drilled in 1963 by a percussion rig and samples are kept by the Mines Department.  The description of the type section is as follows: (from Lawrence 1975).|16-MAY-23
24942|Echuca Formation|Extent|The formation occurs only in the subsurface and was encountered in the Echuca, Naroika, Kyabram and Kotta districts.|16-MAY-23
24942|Echuca Formation|Thickness range|Up to 38 metres.|16-MAY-23
24942|Echuca Formation|Lithology|Light brown to grey slightly carbonaceous clay. It is micaceous and sandy in parts.|16-MAY-23
24942|Echuca Formation|Relationships and boundaries|It occurs as a lense within the Calivil Formation (Macumber, 1973) at depths of between 90 and 120 metres. It appears to be conformable with the overlying and underlying Calivil Formation.|16-MAY-23
24942|Echuca Formation|Age reasons|The microspore Nothofagus emarcida was reported from this formation (Lawrence 1975). The age range of this fossil is Upper Cretaceoeus to Middle Miocene (Ripper, personal communication). The formation is underlain by beds containing fossils which range in age from Lower Eocene to Lower Miocene. Therefore the age range of the Echuca Formation is Lower Eocene to Lower Miocene.|16-MAY-23
24942|Echuca Formation|Proposed publication|Published Report, Geol. Survey of Vict.|16-MAY-23
24942|Echuca Formation|References|79/02696|16-MAY-23
24942|Echuca Formation|Defn approved by|Victoria (taken from a photocopy - see 75/381)|16-MAY-23
24942|Echuca Formation|Name first published by|Tickell S.J., 1977|16-MAY-23
24273|Fairview Andesitic Breccia|Name source|"Fairview" property, grid reference 645200-5828500, Willaura 1:100 000 Topographic map.|16-MAY-23
24273|Fairview Andesitic Breccia|Type section locality|In the vicinity of Fairview Property (645200-5828500, Willaura 1:100 000 Topographic Map). Good outcrops also occur adjacent to the Hopkins River in the vicinity of Yarrack Road (648100-5821400) - proposed as the reference locality.|16-MAY-23
24273|Fairview Andesitic Breccia|Extent|This unit is exposed over approximately 20 km2 from south of Stavely Railway Siding to the Hopkins River, north of Chatsworth.|16-MAY-23
24273|Fairview Andesitic Breccia|Thickness range|True thickness not known. Maximum outcrop width is approximately 2500 m.|16-MAY-23
24273|Fairview Andesitic Breccia|Lithology|Consists of massively bedded, characteristically structureless, poorly sorted, matrix supported, pale to dark green volcanic breccia with minor intercalated andesite and basalt lava. Clasts range up to, at least, 300 mm, and are dominantly subrounded, rarely angular. Clasts consist of basaltic andesite and andesite and very rare fine grained sedimentary and acidic volcanics. The matrix consists of fine to medium grained volcaniclastic material (volcanic mudstone, volcanic sandstone, andesitic lithics) which occasionally displays fine laminations.|16-MAY-23
24273|Fairview Andesitic Breccia|Relationships and boundaries|The western (assumed stratigraphically lower) contact is a fault contact with St Arnaud Beds. The eastern (assumed stratigraphically upper) contact with the Nanapundah Tuff is recognised by the appearance of cherty laminations in the base of the massive andesitic Nanapundah Tuff. The unit is host to the Glenronald Chert Member.|16-MAY-23
24273|Fairview Andesitic Breccia|Age reasons|No direct evidence of age. Assumed to be Cambrian.|16-MAY-23
24273|Fairview Andesitic Breccia|Defn approved by|asked 12/10/82 for approval sign|16-MAY-23
24273|Fairview Andesitic Breccia|Resdate|01-JUN-1982|16-MAY-23
29221|Forlorn Hope Granodiorite|Name source|Forlorn Hope Plain, grid ref. 005-323, Deddick 1:63,360 F.C.V. map (Bairnsdale 1:250 000 map).|16-MAY-23
29221|Forlorn Hope Granodiorite|Type section locality|Along Buchan River, from near where it is crossed by Forlorn Hope Track, to near Sandy Swamp Creek (grid ref. 0700-3638 to 0900-3400 Cobberas 1:63 360 map).|16-MAY-23
29221|Forlorn Hope Granodiorite|Extent|Extends in narrow belt from upper reaches of Reedy Creek NNE to Buchan River near Mt Wombargo (approximate area 37 km2).|16-MAY-23
29221|Forlorn Hope Granodiorite|Lithology|Dominantly mediu;m-grained grey massive quartz-feldspar-biotite granodiorite, but includes finer grained, somewhat porphyritic, and coarse-grained leucocratic phases.|16-MAY-23
29221|Forlorn Hope Granodiorite|Relationships and boundaries|The unit has intruded Silurian rocks with which it has a sharp boundary, occasionally complicated by dykes. It is surrounded by an aureole of hornfels and fine metaquartzite.|16-MAY-23
29221|Forlorn Hope Granodiorite|Age reasons|The unit intrudes Towanga Formation of probable Late Silurian age, and antedates Lower Devonian Snowy River Volcanics. Its age is therefore either latest Silurian or earliest Devonian.|16-MAY-23
29221|Forlorn Hope Granodiorite|Proposed publication|Report Geol. Surv. Vict.|16-MAY-23
29221|Forlorn Hope Granodiorite|Comments|The geographic name Forlorn Hope was reserved for the proposer in February 1978 for the Forlorn Hope Volcanics. At a later date (20/7/78) the Central Register was notified that the name Forlorn Hope Volcanics was to be changed to Thorkidaan Volcanics, and the proposer received a letter that this name change had been made in the Central Register. The Forlorn Hope Granodiorite is a new name, and is quite unrelated to the Thorkidaan Volcanics.|16-MAY-23
24289|Glenronald Chert Member|Name source|"Glenronald" property, grid reference 644600-5831300, Willaura 1:100 000 Topographic map.|16-MAY-23
24289|Glenronald Chert Member|Type section locality|Creek, immediately south of Mount Stavely and north of the Glenelg Highway (grid reference 644300-5830800, Willaura 1:100 000 Topographic Map).|16-MAY-23
24289|Glenronald Chert Member|Extent|This unit outcrops for a strike length of 11 km, from near Stavely Railway Siding to just south at Yarrack Road.|16-MAY-23
24289|Glenronald Chert Member|Thickness range|Approximately 8 m at the type locality. The unit is probably thinner elsewhere.|16-MAY-23
24289|Glenronald Chert Member|Lithology|Black Chert with occasional thin interbeds of tuffaceous sediment. Breccia in some outcrops.|16-MAY-23
24289|Glenronald Chert Member|Relationships and boundaries|Both boundaries are marked by the change to coarse volcanic breccia (Fairview Andesitic Breccia). Toward the north (642600-58349), unit appears to be in contact with the overlying Nanapundah Tuff unit, suggesting a transgressive relationship.|16-MAY-23
24289|Glenronald Chert Member|Age reasons|No palaeontological evidence. Assumed to be Cambrian|16-MAY-23
24289|Glenronald Chert Member|Defn approved by|asked 12/10/82 for approval sign.|16-MAY-23
24289|Glenronald Chert Member|Resdate|10-JUN-1982|16-MAY-23
8880|Jarrahmond Formation|Name source|This is named after the main town on the Flats.|16-MAY-23
8880|Jarrahmond Formation|Type section locality|It is proven along a section from bores (C.R.B.) 1237220 to 1243856 - cross-section and locations in B.Sc. Honours thesis, 1972;  map grid reference 37o44'S, 148o28'E;  also C.R.B. drawings show location, nos. 147231, 2, 3, 4, 5.|16-MAY-23
8880|Jarrahmond Formation|Extent|It is proven along a line of section by C.R.B. drilling and also by local drillers on the Flats.|16-MAY-23
8880|Jarrahmond Formation|Thickness range|Its maximum thickness is 156ft with its minimum thickness being 8ft and an average thickness of 60ft.|16-MAY-23
8880|Jarrahmond Formation|Lithology|It consists of silt and sand mainly with mixtures of sandy silt, silty clay etc.|16-MAY-23
8880|Jarrahmond Formation|Relationships and boundaries|It outcrops at surface with either Miocene Limestone, gravels (S.R.F. Gravels) or Ordovician siltstone underlying them.|16-MAY-23
8880|Jarrahmond Formation|Age reasons|The presumed age is Quaternary. R-C dating is to be done on shells, peat and wood (Melaleuca) found approximately 40'-68' below the surface.|16-MAY-23
8880|Jarrahmond Formation|Name first published by|McLennen R.L. (authors initials should be R.M.) 1976|16-MAY-23
28816|Mount Walterson Formation|Name source|Mount Walterson, grid ref. 147o20'53"E, 37o4'30"S, Bairnsdale 1:250 000 Sheet.|16-MAY-23
28816|Mount Walterson Formation|Unit history|It is possible that the name Mount Tambo Beds (Howitt, 1876; Gaskin, 1943; Crohn, 1950) has been applied to a nearby outcrop of the same beds.|16-MAY-23
28816|Mount Walterson Formation|Type section locality|Not designated.|16-MAY-23
28816|Mount Walterson Formation|Extent|Not known accurately.|16-MAY-23
28816|Mount Walterson Formation|Thickness range|Not known.|16-MAY-23
28816|Mount Walterson Formation|Lithology|Conglomerate, sandstone, with a lenticular limestone.|16-MAY-23
28816|Mount Walterson Formation|Relationships and boundaries|Stated to be laterally equivalent to Towanga Formation. Boundary criteria not stated.|16-MAY-23
28816|Mount Walterson Formation|Age reasons|Thought to be Silurian from conodont identification in other parts of the sequence.|16-MAY-23
28816|Mount Walterson Formation|Comments|NOTES: The present name is a correction for the Mount Waterson Formation of Talent (1965, and in Talent et al., 1975). The correct spelling of the geographic feature, Mount Walterson, has been checked with detailed maps and people living in the area). Further work may prove this informal name to be a junior synonym of Mount Tambo Beds.|16-MAY-23
28816|Mount Walterson Formation|References|Gaskin A.J., 1943. The Geology of Bindi, Victoria. Proc. Roy. Soc. Vic. 55 (N.S.) part 1, p81 (01/31647); Crohn P.W., 1950. The Geology, Petrology and Physiography of the Omeo District, Victoria. Proc. Roy. Soc. Vic. 62 (N.S.) part 1, p1. (01/31648).|16-MAY-23
27072|Mudgeegonga Granite|Name source|Bulk of granite lies within the eastern part of the Parish of Mudgeegonga and is located about 5 km east of the small settlement of Mudgeegonga. A general AMG reference is 491000 5965800, Albury 1:100 000 Sheet area (8225, Edition 1, Series R652); Wangaratta 1:250 000 Sheet area (SJ55-2, Edition 1, Series R502).|16-MAY-23
27072|Mudgeegonga Granite|Type section locality|Fresh granite is exposed at the base of pylons of the Mount Beauty-Bendigo power line, where the line is crossed by the track from Glen Creek (see grid ref. above).|16-MAY-23
27072|Mudgeegonga Granite|Extent|The granite is exposed over 21 km2 on the southeastern portion of the Albury 1:100 000 Sheet area, about 5 km due east of Mudgeegonga. The granite extends onto the adjoining Buffalo 1:100 000 Sheet area (8224).|16-MAY-23
27072|Mudgeegonga Granite|Lithology|Granite, medium grained. Thin section shows the granite has an aphyric, equigranular texture; potassium feldspar and plagioclase are sub-equal in abundance and hence the rock is a granite. Much of the felsic material has a crystal size of 0.5-1.5 mm and consists of equant anhedral and subhedral crystals which are fresh and clear. Some K-feldspar has a perthitic texture.  Biotite forms subhedral flakes which have a rather unusual green colour but nevertheless appear to be fresh.|16-MAY-23
27072|Mudgeegonga Granite|Relationships and boundaries|The granite forms part of what has previously been called the Yackandandah Granite. The medium grained granite of the Mudgeegonga area is quite distinct from the coarse grained porphyritic Yackandandah Granite. The Medgeegonga Granite stands up as rugged hills in contrast to the more subdued topography of the adjoining Yackandandah Granite. The boundary between the two intrusions is sharp but there is no direct outcrop evidence indicating which is the older. The Yackandandah Granite shows well developed platey flow features and the Mudgeegonga Granite cuts this feature suggesting the Mudgeegonga Granite intrudes the Yackandandah Granite. K-Ar dates suggest the two bodies are of similar age.|16-MAY-23
27072|Mudgeegonga Granite|Age reasons|Potassium-argon dating suggests a minimum age of 391 +/- 7 million years (McKenzie et al., 1983).|16-MAY-23
27072|Mudgeegonga Granite|Comments|The Mudgeegonga Granite forms part of a larger area of granitic rocks running northward to Yackandandah and then northeast to the Kiewa River. This intrusion has variously been called the Yackandandah Granodiorite (Baker 1937), Yackandandah Granite (Edwards and Easton, 1937, King, 1983), Yackandandah Basin Granite (Leggo and Beavis 1973, GSV 1974, King 1979). In describing this intrusion Tattam (1976) uses the term "Yackandandah Basin Pluton".  The term Yackandandah Granite is the preferred term as "Yackandandah Basin" is a landform term that does not appear on topographic maps therefore making its use as a stratigraphic name invalid. Prior to King (1982) the only detailed mapping conducted on this pluton has been by Easton (1907-8) and Leggo (1964) but well to the north and west of the Mudgeegonga area. The GSV map (1974) and the map in Leggo and Beavis (1973) both show the granite at Mudgeegonga as undifferentiated and part of the Yackandandah (Basin) Granite. The Mudgeegonga Granite is distinct from the Yackandandah Granite in both hand specimen and outcrop pattern. Part of its outcrop is shown on the Yackandandah 1:50 000 geological map (King 1982).|16-MAY-23
27072|Mudgeegonga Granite|References|Leggo M.D., Beavis F.C., 1973. Palaeozoic metamorphism and igneous activity in north-east Victoria in Regional guide to Victorian geology. School of Geology, Univ. of Melb. p202-212 (79/02544); Tattam C.M., 1976. Petrology of igneous rocks in Geology of Victoria. Spec. Publ. Geol. Soc. Aust., 5, p357 (79/04241); Baker G., 1937. Orthite in Some Victorian granitic Rocks. Proc. roy. Soc. Vic. 50 (N.S.) pt 1, p47 (01/31649); Edwards A.B., Easton J.G., 1937. Igneous Rocks of North-Eastern Benambra. Proc. Roy. Soc. Vic. 50 (N.S.) part 1, p67 (01/31650).|16-MAY-23
27072|Mudgeegonga Granite|Proposer|King R.|16-MAY-23
27072|Mudgeegonga Granite|Resdate|22-APR-1983/18-MAY-1984 ?|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Name source|Narrapumelap Road, grid reference 651000-5827400, Willaura 1:100 000 Topographic Map.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Type section locality|On the southern bank of the Hopkins River at 649400-5822300, Willaura 1:100 000 Topographic map.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Extent|Unit occurs as isolated outcrop and scattered float, near Stavely Railway Siding and adjacent to Christies Lane/Hopkins River.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Thickness range|True thickness not known - estimated at 10 m.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Lithology|Thin (10 m?) sequence of pink to grey porphyritic (plagioclase, quartz) volcanic rock having a very fine grained microfelsic matrix containing K-feldspar, chlorite and fine haematite granules. The rock has a gross rhyolitic to dacitic composition.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Relationships and boundaries|The upper and lower contacts are marked by a change to dacitic crystal tuff, laminated tuffaceous sandstone and laminated chert (Towanway Tuff).|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Age reasons|Age not known. Assumed to be Cambrian.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|References|83/23306|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Defn approved by|Asked 12/10/82 for approval sign.|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Resdate|10-JUN-1982|16-MAY-23
24422|Narrapumelap Road Rhyolite Member|Unit name|Narrapumelap Road Rhyolite Member (of Towanway Tuff)|16-MAY-23
24475|Romsey Group|Name source|Township of Romsey, 55 km NNW of Melbourne|16-MAY-23
24475|Romsey Group|Constituents|Lano Gully Sandstone, Stauro Gully Shale, Split Hill Sandstone, Bryo Gully Shale, Angry Hill Sandstone (in upward succession).|16-MAY-23
24475|Romsey Group|Type section locality|Between Deep Creek and Lano Gully, 4.4 to 5.7 km NE of Romsey.|16-MAY-23
24475|Romsey Group|Extent|The group is intermittently exposed between the western flank of Mt William, northeast of Lancefield, to Deep Creek, east of Romsey, for a strike length of about 14 km and a width of about 1 km.|16-MAY-23
24475|Romsey Group|Thickness range|Range 1180-1010 m.|16-MAY-23
24475|Romsey Group|Lithology|Dominantly sandstone, with some interbedded black shale, siltstone and fine conglomerate|16-MAY-23
24475|Romsey Group|Relationships and boundaries|Overlies Goldie Chert (Thomas, 1960) with probable conformity. Underlies unnamed beds with Bendigonian graptolites with conformity. Base of group defined by change from well-bedded shaly siltstone with thin chert bands, to poorly bedded micaceous siltstone without chert. Top defined by appearance of Tetragraptus fruticosus.|16-MAY-23
24475|Romsey Group|Age reasons|The basal unit is unfossiliferous, but the remainder contains Lancefieldian graptolites, ranging from La1 to La3. The type localities of Zones La1, La1.5 and La2 are situated in the group.|16-MAY-23
24475|Romsey Group|Proposer|VandenBerg A.H.M. & Wilkinson H.E.|16-MAY-23
19157|Waaia Sand Member|Name source|Parish of Waaia, grid reference 322547, Bendigo 1:250 000 Sheet area.|16-MAY-23
19157|Waaia Sand Member|Type section locality|Mines Department of Victoria borehole Waaia 20, grid reference 322547, Bendigo 1:250 000 Sheet area. The hole was drilled in 1972 by a percussion rig and samples and a gamma log of the hole are kept by the Mines Department.  The description of the type section is as follows:|16-MAY-23
19157|Waaia Sand Member|Extent|The unit occurs only in the subsurface and has been intersected by many boreholes on the alluvial plains of the Campaspe and Goulburn rivers.|16-MAY-23
19157|Waaia Sand Member|Thickness range|2 to 6 metres, tends to be lenticular.|16-MAY-23
19157|Waaia Sand Member|Lithology|Unconsolidated to poorly consolidated feldspathic and micaceous sand and clayey sand; light brown, reddish brown and grey in colour; fine sand to gravel sized and often showing upward fining cycles.|16-MAY-23
19157|Waaia Sand Member|Relationships and boundaries|It occurs within the Shepparton Formation (Lawrence 1975) at a depth of between 30 and 45 metres below the ground surface and is overlain, underlain and intertongues with clays of the same formation. On a regional scale, upper and lower contacts are conformable but on a local scale, lower contacts are disconformable as the sands are often channel fills. The deposits have a shoe-string sand type form and in a few areas the sand bodies coalesce into sheets. The unit has a low basinwards dip which is only measurable over distances of several kilometres.|16-MAY-23
19157|Waaia Sand Member|Age reasons|A radiocarbon date of 30 600+/-1300 years B.P. was obtained by Bowler (1967) on the Barwo Member of the Shepparton Formation. This member is at a higher stratigraphic level than the Waaia member thus setting an upper age limit for the latter. A lower age limit is obtained from the fact that the Shepparton Formation overlies the Renmark Group whose age is Palaeocene to Lower Eocene (Harris 1971).|16-MAY-23
19157|Waaia Sand Member|Proposed publication|Published report, Geological Survey of Victoria|16-MAY-23
19157|Waaia Sand Member|References|01/31644; 79/01965|16-MAY-23
19157|Waaia Sand Member|Name first published by|Tickell S.J., 1977.|16-MAY-23
20754|Yalca Sand Member|Name source|Parish of Yalca, grid reference 324560, Deniliquin 1:250 000 Sheet area.|16-MAY-23
20754|Yalca Sand Member|Type section locality|Mines Department of Victoria borehole, Yalca 38, grid reference 324560, Deniliquin 1:250 000 Sheet area. The hole was drilled in 1973 by a percussion rig and samples and a gamma log of the hole are kept by the Mines Department. The description of the type section is as follows:|16-MAY-23
20754|Yalca Sand Member|Extent|The unit occurs only in the subsurface and has been intersected by boreholes on the alluvian plains of the Campaspe and Goulburn rivers.|16-MAY-23
20754|Yalca Sand Member|Thickness range|5-25 m, tends to be lenticular.|16-MAY-23
20754|Yalca Sand Member|Lithology|Unconsolidated to poorly consolidated, feldspathic and micaceous sand and clayey sand; light brown, reddish brown and grey in colour, fine sand to gravel sized and often showing upward fining cycles.|16-MAY-23
20754|Yalca Sand Member|Relationships and boundaries|It occurs within the Shepparton Formation (Lawrence, 1975) at a depth of between 45 and 80 metres below the ground surface and is overlain, underlain and intertongues with clays of the same formation. On a regional scale upper and lower contacts are conformable but on a local scale, lower contacts are disconformable as sands are often channel fills. The deposits have a shoe-string type form and in some areas the sand bodies coalesce into sheets. The unit has a low basinwards dip which is measurable, only over distances of several kilometres.|16-MAY-23
20754|Yalca Sand Member|Age reasons|A radiocarbon date of 30 600+/-1 300 years BP was obtained by Bowler (1967) on the Barwo Member of the Shepparton Formation. This member is at a higher stratigraphic level than the Yalca Member, thus setting an upper age limit for the latter. A lower age limit is obtained from the fact that the Shepparton Formation overlies the Renmark Group whose age is Palaeocene to Lower Eocene (Harris 1971).|16-MAY-23
20754|Yalca Sand Member|Proposed publication|Published Report, Geological Survey of Victoria.|16-MAY-23
20754|Yalca Sand Member|References|01/31644; 79/01965;|16-MAY-23
20754|Yalca Sand Member|Defn approved by|retyped from a photocopy - see 75/381 8 November 1976|16-MAY-23
20754|Yalca Sand Member|Name first published by|Tickell S.J., 1977|16-MAY-23
20981|Yielima Sand Member|Name source|Parish of Yielima, GR 324568, Deniliquin 1:250 000 sheet area.|16-MAY-23
20981|Yielima Sand Member|Type section locality|Mines Department of Victoria borehole Yielima 1, GR 324568, Deniliquin 1:250 000 sheet area. The hole was drilled in 1972 by a percussion rig and samples and a gamma log of the hole are kept by the Mines Department. The description of the type section is as follows: Top from 85.4 to 91.5 6.1 m thick; light brown clayey, micaceous, feldspathic medium grained sand; Bottom 91.5 to 94.6 3.1 m thick; light brown to white, feldspathic, coarse grained sand.|16-MAY-23
20981|Yielima Sand Member|Extent|The unit occurs only in the subsurface and has been intersected by boreholes on the alluvial plain of the Goulburn river.|16-MAY-23
20981|Yielima Sand Member|Thickness range|5 to 10 m but locally up to 30 m.|16-MAY-23
20981|Yielima Sand Member|Lithology|Unconsolidated, poorly consolidated and occasionally cemented, feldspathic and micaceous sand and clayey sand; light brown, reddish brown, grey and white in colour, fine sand to gravel sized and often showing upward fining cycles.|16-MAY-23
20981|Yielima Sand Member|Relationships and boundaries|It occurs at or near the base of the Shepparton Formation (Lawrence 1975) at a depth of between 80 and 120 m below the ground surface and is overlain, underlain in part and intertongues with clays of the same formation. In a narrow north-south trending zone which passes through Mooroopna the unit is thicker than on adjacent areas and it rests directly on the Calivil Formation (Macumber 1973). The sands and gravels of the Yielima member are mostly channel fill deposits, therefore on a local scale the basal contact with other units may be a disconformity. On a larger scale all contacts of the unit appear to be conformable. The unit has a low basinwards dip, measurable only over several kilometres.|16-MAY-23
20981|Yielima Sand Member|Age reasons|A radiocarbon date of 30,600 +/- 13,000 years BP was obtained by Bowler (1967) on the Barwo Member of the Shepparton Formation. This member is at a higher stratigraphic level than the Yielima Member, thus setting an upper age limit for the latter. A lower age limit is obtained from the fact that the Shepparton Formation overlies the Renmark Group whose age is Palaeocene to Lower Eocene (Harris 1971).|16-MAY-23
20981|Yielima Sand Member|Proposed publication|Published Report, Geological Survey of Victoria|16-MAY-23
20981|Yielima Sand Member|References|79/01965;  79/02696.|16-MAY-23
20981|Yielima Sand Member|Defn approved by|Typed from a photocopy - see 75/381 8 November 1976|16-MAY-23
20981|Yielima Sand Member|Name first published by|Tickwell, S.J., 1977|16-MAY-23
