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Yarralumla Formation STRATNO: 20879
Current: Yes Rank: Formation, beds Status: Formal State(s): ACT , NSW
Category: Other new published name Usage: Defined Definition Card: Yes (View definition data)
Originator: Abell, R.S. (after Opik 1958) 29-OCT-90 Entry date: 01-JAN-88Last Update: 20-AUG-18
Replaced by: Previously known as:
Description: Calcareous and tuffaceous mudstone and siltstone with minor limestone, calc-silicate hornfels and quartz sandstone
Comments: BMR Bulletin 233. Approved by A. Waltho 17-MAY-1990? Included in the Laidlaw Volcanic Suite for stratigraphic relations with Deakin Volcanics. Geol Survey NSW has included it within the Douro Group (Yass area). Formerly included in 'Red Hill Group' of Opik.
Geological province: Lachlan Orogen
Type state: ACTReference section type:
Maximum thickness: 300mMinimum thickness:
Unit Age Event: deposition
Top of unit -
Minimum age: Ludlow Ma: % from base of biozone: Age method:
Maximum age: Ma: % from base of biozone: Age method:
Base of unit -
Minimum age: Ma: % from base of biozone: Age method:
Maximum age: Ludlow Ma: % from base of biozone: Age method:

Stratigraphic Hierarchy (current units only) Rank Status

Chemical Hierarchy (current units only) Rank Status


Related units: Relationship: Contact Type:
Deakin Volcanics overlies Yarralumla Formation conformity
Mount Painter Volcanics underlies Yarralumla Formation unconformity
First Reference:
REFID: 43385 Voisey, A.H., 1958, Clarke Memorial Lecture. Further remarks on the sedimentary formations of New South Wales, Royal Society of New South Wales. Journal and Proceedings, 91(4), 165-188

Definition Reference:
REFID: 42820 Abell, R.S., 1991, Geology of the Canberra 1:100 000 Sheet area, New South Wales and Australian Capital Territory, Bureau of Mineral Resources, Australia. Bulletin, 233, 116p

Use on maps:
REFID: 12185 Best, J.G., D'Addario, G.W., Walpole, B.P., Rose, G., 1964, Canberra sheet SI55-16. Australian 1:250 000 geological series., Bureau of Mineral Resources and Geological Survey of New South Wales.
REFID: 29992 Brunker, R.L., Offenberg, A.C., West, J.L., 1970, 1:500 000 geological series; Monaro., Geological Survey of New South Wales, 1st Ed.
REFID: 29994 Brunker, R.L., Offenberg, A.C., West, J.L., 1971, Monaro, New South Wales 1:500 000 geological series 1st Edition., Geological Survey of New South Wales, 1v
REFID: 31019 Gilligan, L.B., Cameron, R.G., 1974, Canberra, New South Wales, 1:250 000 metallogenic series map. Sheet SI 55-16, 1st edition., Geological Survey of New South Wales, 1v
REFID: 31284 Henderson, G.A.M., Strusz, D.L., 1971, Canberra, Australian Capital Territory, 1:50 000 special geological series map., Bureau of Mineral Resources, Australia, 1v
REFID: 36633 Henderson, G.A.M., Matveev, G., 1980, Geology of Canberra, Queanbeyan, and Environs, 1:50 000 geological series map. 1st edition., Bureau of Mineral Resources, Australia, 1v
REFID: 39947 Henderson, G.A.M., 1985, Central Canberra, Australian Capital Territory, 1:10 000 engineering geology series map. Sheet 208-600, 1st edition., Bureau of Mineral Resources, Australia, 1v
REFID: 42497 Duff, B.A., Ward, P., Crook, K.A.W., Rickard, M.J., 1985, Tasman Orogen Profile 5 - Wagga Wagga-Batemans Bay, New South Wales., Geological Survey of New South Wales, 1v, Map
REFID: 42727 Abell, R.S., 1992, Canberra 1:100 000 scale geological map sheet 8727. 1st edition., Bureau of Mineral Resources, Australia, 1v, map


Full Bibliographic Details (ordered by usage, publication year)

REFID: 42820 Abell, R.S. 1991 Geology of the Canberra 1:100 000 Sheet area, New South Wales and Australian Capital Territory Bureau of Mineral Resources, Australia. Bulletin 233 116p
Usage: Defined (p30) Min age from reference: early Ludlow Comments: of Laidlaw Volcanic Suite. Age early Late Silurian (early Ludlow)
REFID: 40328 Pickett, J. 1982 The Silurian System in New South Wales. Geological Survey of New South Wales. Bulletin 29
Usage: Fully described (p118) Comments:
REFID: 22857 Scheibner, E. , Basden, H. (ed.) 1998 Geology of New South Wales - Synthesis. Volume 2 Geological Evolution. Geological Survey of New South Wales. Memoir (Geology) 13(2) 666pp
Usage: Described (p176, p462 App.1 Tb.A1.6) Min age from reference: Ludlovian Max age from reference: Ludlovian Comments: Overlain by Deakin Volcanics. Calcareous tuffaceous mudstone and siltstone; minor beds of limestone, quartz arenite. Max. thickness: 300m.
REFID: 39975 Strusz, D.L. 1984 Brachiopods of the Yarralumla Formation (Ludlovian), Canberra, Australia. Alcheringa 8(2) p123-150
Usage: Described (p123) Comments:
REFID: 37728 Henderson, G.A.M. 1981 Geology of Canberra, Queanbeyan, and environs. Notes to accompany the 1980 1:50 000 geological map. Bureau of Mineral Resources, Australia 1v
Usage: Described (Table 2) Comments:
REFID: 33328 Strusz, D.L. , Henderson, G.A.M. 1971 Canberra City, Australian Capital Territory, 1:50 000 geological series explanatory notes. Bureau of Mineral Resources, Australia 1v
Usage: Described (Table 1) Comments: See also p5 & 14.
REFID: 42727 Abell, R.S. 1992 Canberra 1:100 000 scale geological map sheet 8727. 1st edition. Bureau of Mineral Resources, Australia 1v map
Usage: Briefly described (map legend) Min age from reference: Ludlow Max age from reference: Ludlow Comments: Calcareous and tuffaceous mudstone and siltstone; minor limestone, calc-silicate hornfels and quartz sst. Over Mount Painter Volcanics; intruded by Federal Golf Course Tonalite. BMR map symbol: Suy. Geol. Prov: Canberra Block.
REFID: 41356 Owen, M. , Senior, D. , Owen, J. , Hodgson, J. 1988 Geological monuments in the Australian Capital Territory. Australian Heritage Commission 1v
Usage: Briefly described (p63) Comments: See also P29 and P84
REFID: 49043 Henderson, G.A.M. 1986 Commentary on the central Canberra 1:10 000 engineering geology sheet, Australian Capital Territory. Bureau of Mineral Resources, Australia, Report 267
Usage: Briefly described (p7) Comments:
REFID: 42497 Duff, B.A. , Ward, P. , Crook, K.A.W. , Rickard, M.J. 1985 Tasman Orogen Profile 5 - Wagga Wagga-Batemans Bay, New South Wales. Geological Survey of New South Wales 1v Map
Usage: Briefly described (Map Legend) Min age from reference: Wenlockian Max age from reference: Wenlockian Comments:
REFID: 38664 Henderson, G.A.M. , Strusz, D.L. 1982 Rocks and fossils around Canberra. Australian Government Publishing Service, Canberra 1v
Usage: Briefly described (p6) Comments: See also P12
REFID: 37141 NCDC, Australia. 1976 District plan for Florey neighbourhood Belconnen. National Capital Development Commission, Australia. Technical Paper 15 p7-13
Usage: Briefly described (Plan 6) Comments:
REFID: 35614 Townley, K.A. , Veevers, J.J. , Strusz, D.L. 1974 Rocks and fossils around Canberra. (Revised by D.L. Strusz). Bureau of Mineral Resources, Australia 1
Usage: Briefly described (p6) Comments:
REFID: 33325 Strusz, D.L. 1971 Canberra, New South Wales, 1:250 000 geological series explanatory notes. Sheet SI/55-16. Bureau of Mineral Resources, Australia 1v
Usage: Briefly described (Table 2) Comments: See also Table 3.
REFID: 34405 Packham, G.H. , Carter, E.K. , Moye, D.G. , Sharp, K.R. , Stapledon, D.H. 1969 Silurian system. IN Packham G.H.(ed) - The geology of New South Wales. Geological Society of Australia. Journal 16(1) p104-128
Usage: Briefly described (Table 3.5) Comments:
REFID: 12185 Best, J.G. , D'Addario, G.W. , Walpole, B.P. , Rose, G. 1964 Canberra sheet SI55-16. Australian 1:250 000 geological series. Bureau of Mineral Resources and Geological Survey of New South Wales.
Usage: Briefly described (map legend) Min age from reference: Upper Silurian Max age from reference: Upper Silurian Comments: Of Red Hill Group. Calcareous shale and sandstone, fossiliferous limestone. BMR map symbol: Suy.
REFID: 68592 Thomas, O.D. , Pogson, D.J. 2012 Goulburn 1:250 000 geological sheet SI/55-12 2nd Edition Explanatory notes Geological Survey of New South Wales 69p, chart and CD
Usage: Mentioned (p428, p443, p477, p502) Comments: Opik (1958). Canberra area. Equivalent to, but not yet formally included in, the Douro Group.
REFID: 24248 Strusz, D.L. 2002 Brachiopods of the Orders Protorthida and Orthida from the Silurian of the Yass Syncline, southern New South Wales Alcheringa 26 (1) p49-86
Usage: Mentioned (p67) Comments:
REFID: 13996 Pickett, J.W. , Burrow, C.J. , Holloway, D.J. , Munson, T.J. , Percival, I.G. , Rickards, R.B. , Sherwin, L. , Simpson, A.J. , Strusz, D.L. , Turner, S. , Wright, A.J. 2000 Silurian palaeobiogeography of Australia Association of Australasian Palaeontologists, Memoir 23 127-165
Usage: Mentioned (p143) Min age from reference: Silurian Max age from reference: Silurian Comments: Canberra area. A gastropod mentioned.
REFID: 22768 Scheibner, E. , Basden, H. (ed.) 1998 Part 6(16). Silurian-Middle Devonian. In: Geology of New South Wales - Synthesis. Geological Survey of New South Wales. Memoir (Geology) 13(2) p140-189
Usage: Mentioned (p176) Comments:
REFID: 5252 Sherwin, L. 1995 Siluro-Devonian brachiopods from the Amphitheatre and Winduck Groups (Cobar Supergroup), western New South Wales Association of Australasian Palaeontologists, Memoir 18 61-96
Usage: Mentioned (p86) Max age from reference: Ludlovian Comments:
REFID: 43481 Lewis, G.B. , Abell, R.S. 1994 Geology of Canberra Field Trip Guide AGSO Field Trip Guide 1 16
Usage: Mentioned (3,5,11) Comments:
REFID: 43158 Chappell, B.W. , White, A.J.R. , Wyborn, D. 1993 IAVCEI Canberra 1993 - Excursion Guide - The Cowra Granodiorite and its Enclaves Australian Geological Survey Organisation. Record 1993/67 28p
Usage: Mentioned (3) Comments:
REFID: 43159 Wyborn, D. 1993 Palaeozoic Felsic Volcanism in the Canberra District Australian Geological Survey Organisation. Record 1993/68 13p
Usage: Mentioned (Fig.2p4,p6.) Max age from reference: Late Silurian Comments:
REFID: 42994 Strusz, D.L. 1990 Catalogue of Type, Figured and Cited specimens in the Commonwealth Palaeontological Collection -- BRACHIOPODA. Bureau of Mineral Resources, Australia, Report 298 289pp
Usage: Mentioned (p19) Comments:
REFID: 49690 Henderson, G.A.M. 1990 Late Silurian geology in the Michelago-Cooma area, A.C.T. and N.S.W., 1883-1985. Bureau of Mineral Resources, Record 90/ 35 43pp
Usage: Mentioned (p27 ) Comments: Canberra region.
REFID: 40689 Feary, D.A. 1986 Silurian carbonate and clastic facies of the Ravenswood Subgroup, New South Wales, Australia. IN 12th International Sedimentological Congress, 24-30 Aug. 1986, Canberra, Australia. Field Excursion 2C. Bureau of Mineral Resources, Australia 1v
Usage: Mentioned (p4) Comments:
REFID: 39947 Henderson, G.A.M. 1985 Central Canberra, Australian Capital Territory, 1:10 000 engineering geology series map. Sheet 208-600, 1st edition. Bureau of Mineral Resources, Australia 1v
Usage: Mentioned (Map legend) Min age from reference: Late Silurian Max age from reference: Late Silurian Comments:
REFID: 47037 Strusz, D.L. 1984 Brachiopods from the Silurian of Fyshwick, Canberra, Australia. BMR Journal of Australian Geology and Geophysics 9(2) p107-19
Usage: Mentioned (p107) Comments:
REFID: 38035 Wyborn, D. , Owen, M. , Compston, W. , McDougall, I. 1982 The Laidlaw Volcanics; a Late Silurian point on the geological time scale. Earth and Planetary Science Letters 59(1) p90-100
Usage: Mentioned (p91) Comments:
REFID: 37752 Strusz, D.L. 1982 Wenlock brachiopods from Canberra. Alcheringa 6(2) p105-142
Usage: Mentioned (p105) Comments:
REFID: 36633 Henderson, G.A.M. , Matveev, G. 1980 Geology of Canberra, Queanbeyan, and Environs, 1:50 000 geological series map. 1st edition. Bureau of Mineral Resources, Australia 1v
Usage: Mentioned (Map legend) Min age from reference: Late Silurian Max age from reference: Late Silurian Comments:
REFID: 37013 Strusz, D.L. 1980 The Encrinuridae and related trilobite families, with a description of Silurian species from southeastern Australia. Palaeontographica, Abteilung A A 168 p1-68
Usage: Mentioned (p27) Comments:
REFID: 45147 Owen, M. , Wyborn, D. 1979 Geology and geochemistry of the Tantangara and Brindabella 1:100 000 Sheet areas, New South Wales and Australian Capital Territory. Bureau of Mineral Resources, Australia. Bulletin 204
Usage: Mentioned (M164) Comments:
REFID: 36413 Richardson, S.J. 1979 Geology of the Michelago 1:100 000 sheet 8726. Geological Survey of New South Wales 1v 253pp
Usage: Mentioned (Table 2) Comments:
REFID: 48971 Jones, P.J. , de Deckker, P. 1978 Check list of Ostracoda recorded from Australia and Papua New Guinea, 1845-1973. Bureau of Mineral Resources, Australia, Report 195
Usage: Mentioned (p9) Comments: See also P17.
REFID: 35110 Briscoe, G. , Furstner, J.M.M. , Henderson, G.A.M. , Jacobson, G. , Kellett, J.R. , Lang, P.A. , Purcell, D.C. , Strusz, D.L. , Vanden Broek, P.H. 1976 Environmental and engineering geology of the Canberra area. 25th International Geological Congress. Excursion Guide 12B
Usage: Mentioned (Fig.3) Comments:
REFID: 31111 Grant, K. 1976 Terrain classification and evaluation for engineering purposes of the Canberra area, ACT & NSW. CSIRO. Division of Applied Geomechanics. Technical Paper 22
Usage: Mentioned (p138) Comments: Also mention P140, 144, 146.
REFID: 39331 Crook, K.A.W. , Powell, C.McA. 1976 The evolution of the southeastern part of the Tasman Geosyncline. 25th International Geological Congress. Excursion Guide 17A
Usage: Mentioned (p50) Comments:
REFID: 37348 Brown, M.C. , Ollier, C.D. 1975 Geology and scenery of Canberra. Australian Geographer 13 p97-103
Usage: Mentioned (p97) Comments:
REFID: 31019 Gilligan, L.B. , Cameron, R.G. 1974 Canberra, New South Wales, 1:250 000 metallogenic series map. Sheet SI 55-16, 1st edition. Geological Survey of New South Wales 1v
Usage: Mentioned (Map legend) Min age from reference: Silurian Max age from reference: Silurian Comments:
REFID: 31284 Henderson, G.A.M. , Strusz, D.L. 1971 Canberra, Australian Capital Territory, 1:50 000 special geological series map. Bureau of Mineral Resources, Australia 1v
Usage: Mentioned (Map legend) Min age from reference: Late Silurian Max age from reference: Late Silurian Comments:
REFID: 29994 Brunker, R.L. , Offenberg, A.C. , West, J.L. 1971 Monaro, New South Wales 1:500 000 geological series 1st Edition. Geological Survey of New South Wales 1v
Usage: Mentioned (Map legend) Min age from reference: Late Silurian Max age from reference: Late Silurian Comments:
REFID: 29992 Brunker, R.L. , Offenberg, A.C. , West, J.L. 1970 1:500 000 geological series; Monaro. Geological Survey of New South Wales 1st Ed.
Usage: Mentioned (Map legend) Min age from reference: Silurian Max age from reference: Silurian Comments:
REFID: 31852 Link, A.G. 1970 Age and correlation of the Siluro-Devonian strata in the Yass Basin, New South Wales. Geological Society of Australia. Journal 16(2) p711-722
Usage: Mentioned (Fig. 5) Comments: Ludlovian
REFID: 43344 Branagan, D.F. , McElroy, C.T. , Packham, G.H. 1967 Field geology of New South Wales Science Press 191
Usage: Not recorded (p110,113,115,116) Max age from reference: Late Silurian Comments:
REFID: 43385 Voisey, A.H. 1958 Clarke Memorial Lecture. Further remarks on the sedimentary formations of New South Wales Royal Society of New South Wales. Journal and Proceedings 91(4) 165-188
Usage: Not recorded (p171,172) Comments: L.Ludlow
REFID: 44970 Opik, A.A. 1958 The geology of the Canberra City district. Bureau of Mineral Resources, Australia. Bulletin 32 99pp
Usage: Not recorded (p1,34,38-9,42-46,48,) Max age from reference: Late Silurian Comments: p79,80,89,95,map. Unit of Red Hill Group

Bibliographic references returned: 48 This data is subject to Geoscience Australia's disclaimer and copyright statements.