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Bulgo Sandstone STRATNO: 2863
Current: Yes Rank: Formation, beds Status: Formal State(s): NSW
Category: Unknown or process pending Usage: Fully described Definition Card: No
Originator: Entry date: 01-JAN-88 Last Update: 11-JUL-12
Replaced by: Previously known as:
Description: Fine to medium-grained quartz-lithic sandstone with lenticular shale interbeds.
Comments: Not to be confused with Bulga Formation in the Singleton area.
Geological province: No quality assured province information available
Type state: Reference section type:
Maximum thickness: 100m Minimum thickness:
Unit Age Event: deposition
Top of unit -
Minimum age: Early Triassic 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: Early Triassic Ma: % from base of biozone: Age method:

Stratigraphic Hierarchy (current units only): - Rank: - Status:

Chemical Hierarchy (current units only): - Rank: - Status:

  • Bulgo Sandstone- Formation, beds- Formal
Related units: Relationship: Contact Type:
First Reference:
REFID: 43395 Crook, K.A.W., 1957, The stratigraphy and petrology of the Narrabeen Group in the Grose River district, Royal Society of New South Wales. Journal and Proceedings, 90, 61-79

Use on maps:
REFID: 36222 Bowman, H.N., Stewart, T.R., 1974, Wollongong, New South Wales, 1:50 000 geological series map. Sheet 9029-II, 1st edition. (See Geology of the Wollongong, Kiama & Robertson 1:50 000 sheets by Geol. Surv.NSW), Geological Survey of New South Wales, 1v
REFID: 42737 Stroud, W.J., Sherwin, L., Ray, H.N., Baker, C.J., Smart, K.G., 1985, Wollongong-Port Hacking 1:100 000 geological series sheet 9029-9129., Geological Survey of New South Wales, 1v, Map
REFID: 42926 Clark, N.R., Jones, D.C., 1991, Penrith 1:100 000 geological map, sheet 9030., New South Wales. Department of Minerals and Energy, map

Full Bibliographic Details (ordered by usage, publication year)
REFID: 42896 Sherwin, L. , Holmes, G.G. 1986 Geology of the Wollongong and Port Hacking 1:100 000 sheets 9029, 9129. Geological Survey of New South Wales 1v 179pp
Usage: Fully described (p28, Table 2) Comments: of Clifton Subgroup
REFID: 39296 Ward, C.R. 1980 Notes on the Bulgo Sandstone and the Bald Hill Claystone. IN Herbert C.,Helby R.(eds) - A guide to the Sydney Basin. Geological Survey of New South Wales. Bulletin 26 p178-186
Usage: Fully described (p179) Comments: See also PP180-184
REFID: 42926 Clark, N.R. , Jones, D.C. 1991 Penrith 1:100 000 geological map, sheet 9030. New South Wales. Department of Minerals and Energy map
Usage: Described (map legend) Max age from reference: Early Triassic Comments:
REFID: 40602 Herbert, C. 1983 Sydney Basin stratigraphy. IN Herbert C.(ed) - Geology of the Sydney 1:100 000 sheet 9130. Geological Survey of New South Wales 1v p7-34
Usage: Described (p9) Comments:
REFID: 36220 Bowman, H.N. 1974 Geology of the Wollongong, Kiama, and Robertson 1:50 000 sheets. 9029-II, 9028-I & IV. Geological Survey of New South Wales 1v
Usage: Described (p69) Comments: See also P65 & Table 20.
REFID: 30006 Bunny, M.R. 1972 Geology and coal resources of the Southern Catchment Coal Reserve, southern Sydney Basin, New South Wales. Geological Survey of New South Wales. Bulletin 22
Usage: Described (p64) Comments:
REFID: 29901 Bowman, H.W. 1972 Natural slope stability in the City of Greater Wollongong. Geological Survey of New South Wales, Records 14(2) p159-222
Usage: Described (Table 1) Comments:
REFID: 33683 Ward, C.R. 1971 Mineralogical changes as marker horizons for stratigraphic correlation in the Narrabeen Group of the Sydney Basin. Royal Society of New South Wales. Journal and Proceedings 104 p77-88
Usage: Described (Table 1) Comments:
REFID: 34337 McElroy, C.T. 1969 Sydney Basin, Triassic system - Narrabeen Group, South Coast district. IN Packham G.H.(ed) - The geology of New South Wales. Geological Society of Australia. Journal 16(1) p393-395
Usage: Described (p394) Comments:
REFID: 68003 Barnes, R. , Dawson, M. , Spiller, F. 2002 Geology - Integration and upgrade: NSW Western Regional Assessments: Brigalow Belt South Bioregion (Stage 2). A project undertaken for the Resource and Conservation Assessment Council; NSW Western regional assessments Geological Survey of New South Wales WRA / 19 157pp
Usage: Briefly described (p42.) Min age from reference: Triassic Max age from reference: Triassic Comments: Southern Sydney Basin. , Fine-grained sandstone with interbedded shale units.
REFID: 23881 Jones, B.G. , Chowdhury, R.N. , Ghobadi, M.H. 2001 Chapter 7 - Land instability: a case study from the Illawarra region, New South Wales IN Gostin, V.A. ed., 'Gondwana to Greenhouse: Australian Environmental Geoscience' Geological Society of Australia. Special Publication 21 p67-74
Usage: Briefly described (p69 Fig. 7.2) Comments: Of the Narrabeen Group. Geological Province: Sydney Basin.
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: Briefly described (p264, p530 App.1 Tb.A1.9) Min age from reference: Early Triassic Max age from reference: Early Triassic Comments: Of the Clifton Subgroup (Narrabeen Group). Fine to medium-grained quartz-lithic sandstone with lenticular shale interbeds. Max. thickness: ~100m. Geological Province: Sydney Basin.
REFID: 22749 Retallack, G.J. 1997 Palaeosols in the upper Narrabeen Group of New South Wales as evidence of Early Triassic palaeoenvironments without exact modern analogues Australian Journal of Earth Sciences 44(2) p185-201
Usage: Briefly described (p185,Table1p187,196) Comments:
REFID: 61315 New South Wales Department of Mineral Resources 1995 Sydney Basin IN Stewart, R. and Adler, D. (eds.) "New South Wales Wales Petroleum Potential" - Bulletin New South Wales. Department of Mineral Resources. Coal and Petroleum Geology Branch. Bulletin 1 p163-188
Usage: Briefly described (Table SY2) Min age from reference: Early Triassic Max age from reference: Early Triassic Comments: Of the Clifton Subgroup (Narrabeen Group). Geological Province: Sydney Basin
REFID: 43194 Tadros, N.Z. 1993 The Gunnedah Basin, New South Wales. Geological Survey of New South Wales. Memoir (Geology) 12 649p
Usage: Briefly described (p130, p131) Min age from reference: Triassic Max age from reference: Triassic Comments: Sandy alluvial material deposited in the southern Sydney Basin.
REFID: 42925 Jones, D.C. , Clark, N.R. 1991 Geology of the Penrith 1:100 000 sheet 9030. New South Wales. Department of Minerals and Energy 1v 202pp
Usage: Briefly described (Table 18) Max age from reference: Early Triassic Comments:
REFID: 42737 Stroud, W.J. , Sherwin, L. , Ray, H.N. , Baker, C.J. , Smart, K.G. 1985 Wollongong-Port Hacking 1:100 000 geological series sheet 9029-9129. Geological Survey of New South Wales 1v Map
Usage: Briefly described (map legend) Min age from reference: Triassic Comments:
REFID: 36593 Jakeman, B.L. 1980 The relationship between formation structure and thickness in the Permo-Triassic succession of the Southern Coalfield, Sydney Basin, New South Wales, Australia. International Association for Mathematical Geology. Journal 12(3) p185-212
Usage: Briefly described (Table 2) Comments: See also Fig.2.
REFID: 31887 Loughnan, F.C. , McElroy, C.T. 1976 South Coast Permian and Triassic geology. 25th International Geological Congress. Excursion Guide 18B
Usage: Briefly described (p8) Comments:
REFID: 34058 Brunker, R.L. 1969 The Sydney Basin - Triassic System, Narrabeen Group; South C oast State Coal Mine Reserve. IN Packham G.H.(ed) - The geol ogy of New South Wales. Geological Society of Australia. Journal 16(1) p395
Usage: Briefly described (p395) Comments: Triassic
REFID: 60281 Stephenson, A.E. , Burch, G.J. 2004 Preliminary Evaluation of the Petroleum Potential of Australia's Central East Margin Geoscience Australia. Record 2004/06 69p
Usage: Mentioned (p64) Comments: Different unit from Bulga Formation. Extension of the Narrabeen Group under the Hawkesbury Sandstone - a coastal unit.
REFID: 22864 Scheibner, E. , Basden, H. (ed.) 1998 Part 6(19). Early Permian-Middle Triassic. In: Geology of New South Wales - Synthesis. Geological Survey of New South Wales. Memoir (Geology) 13(2) p251-271
Usage: Mentioned (p264) Comments:
REFID: 22969 Maung, T.U. , Alder, D. , Shaw, R. , Hawley, S. 1997 Offshore Sydney Basin. Box 1 Bureau of Resource Sciences, Petroleum Prospectivity Bulletin
Usage: Mentioned (p 27) Comments:
REFID: 22745 Herbert, C. 1997 Sequence stratigraphic analysis of Early and Middle Triassic alluvial and estuarine facies in the Sydney Basin, Australia Australian Journal of Earth Sciences 44(1) p125-143
Usage: Mentioned (p129) Comments: Narrabeen Group, Sydney Basin.
REFID: 22549 Bai, G.P. , Keene, J.B. 1996 Petrology and diagenesis of Narrabeen Group sandstones, Sydney Basin, New South Wales. Australian Journal of Earth Sciences 43(5) p525-538
Usage: Mentioned (p526) Max age from reference: Triassic Comments:
REFID: 43028 Middleton, M.F. 1993 Thermo-tectonic influences on the Sydney Basin during the breakup of Gondwana; In Findlay, Unrug, Banks, & Veevers (eds) Gondwana Eight. Assembly, evolution and dispersal. Proceedings of the Eighth Gondwana Symposium, Hobart, Tasmania, Aust A.A. Balkema, Rotterdam 1v p613-622
Usage: Mentioned (Fig.7,p618) Comments: of Narrabeen Group
REFID: 41123 Lindner, A.W. 1987 Oil and gas developments in Australia in 1986. American Association of Petroleum Geologists. Bulletin 71(10B) p176-189
Usage: Mentioned (p178) Comments:
REFID: 39935 Hargraves, A.J. , Lunarzewski, L. 1985 Review of seam gas drainage in Australia. AIMM. Bulletin and Proceedings 290(1) p55-70
Usage: Mentioned (p58) Comments:
REFID: 40653 Herbert, C. 1983 Geological history. IN Herbert C.(ed) - Geology of the Sydney 1:100 000 sheet 9130. Geological Survey of New South Wales 1v p121-126
Usage: Mentioned (p121) Comments:
REFID: 40652 Lean, J. 1983 Geophysics. IN Herbert C.(ed) - Geology of the Sydney 1:100 000 sheet 9130. Geological Survey of New South Wales 1v p127-137
Usage: Mentioned (p128) Comments:
REFID: 40516 Castle, M.J. , Hewitt, J.W. , Suine, P.F. 1983 Mining subsidence in relation to roads. IN Knight M.J.,Minty E.J., Smith R.B.(eds) - Collective case studies in engineering geology, hydrogeology and environmental geology. Geological Society of Australia. Special Publication 11 p377-397
Usage: Mentioned (Fig.3) Comments:
REFID: 37804 Conaghan, P.J. , Jones, J.G. , McDonnell, K.L. , Royce, K. 1982 A dynamic fluvial model for the Sydney Basin. Geological Society of Australia. Journal 29(1) p55-70
Usage: Mentioned (Table 1) Comments:
REFID: 37722 Kapp, W.A. 1982 Subsidence from deep longwall mining of coal overlain by massive sandstone strata. AusIMM. Proceedings 281 p23-36
Usage: Mentioned (p23) Comments:
REFID: 37168 Kapp, W.A. 1981 Subsidence from deep longwall mining of coal overlain by massive sandstone strata. IN AusIMM Sydney conference July 1981. AusIMM 1v p229-246
Usage: Mentioned (p231) Comments:
REFID: 39293 Bembrick, C. 1980 Geology of the Blue Mountains, western Sydney Basin. IN Herbert C.,Helby R.(eds) - A guide to the Sydney Basin. Geological Survey of New South Wales. Bulletin 26 p134-161
Usage: Mentioned (Fig. 8.11) Comments:
REFID: 39306 Retallack, G. 1980 Late Carboniferous to middle Triassic megafossil floras from the Sydney Basin. IN Herbert C.,Helby R.(eds) - A guide to the Sydney Basin. Geological Survey of New South Wales. Bulletin 26 p384-430
Usage: Mentioned (p389) Comments: See also P410,P411
REFID: 36391 McIlveen, G.R. 1980 Mine data sheets to accompany metallogenic map Sydney 1:500 000 sheet. Geological Survey of New South Wales 1v
Usage: Mentioned (p156) Comments:
REFID: 39308 Herbert, C. , Helby, R. 1980 Part C - Excursion Guide. IN Herbert C.,Helby R.(eds) - A guide to the Sydney Basin. Geological Survey of New South Wales. Bulletin 26 p449-539
Usage: Mentioned (p505) Comments:
REFID: 36594 Facer, R.A. , Cook, A.C. , Beck, A.E. 1980 Thermal properties and coal rank in rocks and coal seams of the southern Sydney Basin, New South Wales: A palaeogeothermal explanation of coalification. International Journal of Coal Geology 1(1) p1-17
Usage: Mentioned (Table 1) Comments: See also Table II.
REFID: 36042 Branagan, D. , Herbert, C. , Langford-Smith, T. 1979 The Sydney Basin. Science Press 1v
Usage: Mentioned (Fig.22) Comments: See also Fig.24.
REFID: 35690 Herbert, C. 1979 The geology and resources potential of The Wianamatta Group. Geological Survey of New South Wales. Bulletin 25
Usage: Mentioned (p61) Comments:
REFID: 35502 Byrnes, J.G. , Rice, T.D. , Karaolis, D. 1978 Guilielmites formed from phosphatized concretions in the Ashfield Shale of the Sydney area. Geological Survey of New South Wales, Records 18(2) p169-200
Usage: Mentioned (Table 1) Comments:
REFID: 30427 Davies, W.N. 1977 Railways in NSW - How the system copes with geotechnical risks. IN Engineering conference mine symposium: "How to live with geotechnical risks". Cooma 1977. Australian Geomechanics Society, Sydney Group, and Institution of Engineers, Australia 1v p34-47
Usage: Mentioned (p39) Comments:
REFID: 32801 Retallack, G.J. 1977 Reconstructing Triassic vegetation of eastern Australasia: a new approach for the biostratigraphy of Gondwanaland. Alcheringa 1(3) p247-278
Usage: Mentioned (Fig.10) Comments:
REFID: 32802 Retallack, G.J. 1977 Triassic palaeosols in the Upper Narrabeen Group of New South Wales. Part II: classification and reconstruction. Geological Society of Australia. Journal 24(1) p19-36
Usage: Mentioned (p22) Comments:
REFID: 31725 Langford-Smith, T. 1976 Blue Mountains. 25th International Geological Congress. Excursion Guide 13B
Usage: Mentioned (p10) Comments: On table
REFID: 30132 Chesnut, W.S. 1976 Engineering geology of the Sydney area. 25th International Geological Congress. Excursion Guide 17B
Usage: Mentioned (Table 1) Comments:
REFID: 31128 Gray, N.M. 1976 Engineering geology of the southern part of the Sydney Basin. 25th International Geological Congress. Excursion Guide 6B
Usage: Mentioned (Table 1) Comments:
REFID: 33867 Williams, R.J. 1976 Hunter Valley: Permian coal measures geology. 25th International Geological Congress. Excursion Guide 11B
Usage: Mentioned (Table 1) Comments:
REFID: 32187 Middlemost, E.A.K. 1976 Mittagong-Bowral. 25th International Geological Congress. Excursion Guide 19B
Usage: Mentioned (p4) Comments:
REFID: 35062 Herbert, C. 1976 Phosphate - New South Wales in Knight C.L. (ed) - Economic geology of Australia and Papua New Guinea - 4. Industrial minerals and rocks. AusIMM. Monograph Series 8 p278-280
Usage: Mentioned (p279) Comments:
REFID: 32800 Retallack, G.J. 1976 Triassic palaeosols in the Upper Narrabeen Group of New South Wales. Part 1: features of the palaeosols. Geological Society of Australia. Journal 23(4) p383-399
Usage: Mentioned (p384) Comments:
REFID: 32799 Retallack, G. 1975 The life and times of a Triassic lycopod. Alcheringa 1 p3-29
Usage: Mentioned (p9) Comments:
REFID: 45090 Mayne, S.J. , Nicholas, E. , Bigg-Wither, A.L. , Rasidi, J.S. , Raine, M.J. 1974 Geology the Sydney Basin - a review. Bureau of Mineral Resources, Australia. Bulletin 149 229pp
Usage: Mentioned (p71) Comments: Relationships in Narrabeen Gp.
REFID: 31886 Loughnan, F.C. , Goldberry, R. , Holland, W.M. 1974 Kaolinite clayrocks in the Triassic Banks Wall Sandstone of the western Blue Mountains, New South Wales. Geological Society of Australia. Journal 21(4) p393-402
Usage: Mentioned (Table 1) Comments:
REFID: 36222 Bowman, H.N. , Stewart, T.R. 1974 Wollongong, New South Wales, 1:50 000 geological series map. Sheet 9029-II, 1st edition. (See Geology of the Wollongong, Kiama & Robertson 1:50 000 sheets by Geol. Surv.NSW) Geological Survey of New South Wales 1v
Usage: Mentioned (Map legend) Min age from reference: Middle Triassic Max age from reference: Middle Triassic Comments:
REFID: 29633 Balme, B.E. , Helby, R.J. 1973 Floral modifications at the Permian-Triassic boundary in Australia in the Permian and Triassic Systems and their mutual boundary. Canadian Society of Petroleum Geologists, Memoir 2 p433-444
Usage: Mentioned (p435) Comments: Upper Permian/Lower Triassic
REFID: 41639 Ingram, J.A. 1973 Phosphate deposits. Second edition. Bureau of Mineral Resources, Australia. Mineral Resources Report 3(2nd ed.)
Usage: Mentioned (p9) Comments:
REFID: 31276 Helby, R. 1973 Review of Late Permian and Triassic palynology of New South Wales. Geological Society of Australia. Special Publication 4 p141-155
Usage: Mentioned (p147) Comments: Palynology
REFID: 31061 Goldbery, R. , Holland, W.N. 1973 Stratigraphy and sedimentation of redbed facies in Narrabeen Group of Sydney Basin, Australia. American Association of Petroleum Geologists. Bulletin 57(7) p1314-1334
Usage: Mentioned (Table 1) Comments:
REFID: 33685 Ward, C.R. 1972 Sedimentation in the Narrabeen Group, southern Sydney Basin, New South Wales. Geological Society of Australia. Journal 19(3) p393-409
Usage: Mentioned (Table 2) Comments:
REFID: 31426 Galloway, M.C. 1972 Statistical analysis of regional heavy mineral variation, Hawkesbury Sandstone and Narrabeen Group (Triassic), Sydney Basin. Geological Society of Australia. Journal 19(1) p65-76
Usage: Mentioned (Fig.1) Comments:
REFID: 31884 Loughnan, F.C. , Goldberry, R. 1971 Kaolinite claystone in the Burralow Formation of the Sydney Basin. AusIMM. Proceedings 238 p59-62
Usage: Mentioned (Table 1) Comments: Triassic
REFID: 30007 Bunny, M.R. , Herbert, C. 1971 The Lower Triassic Newport Formation, Narrabeen Group, southern Sydney Basin. Geological Survey of New South Wales, Records 13(2) p61-81
Usage: Mentioned (p61) Comments:
REFID: 31297 Herbert, C. 1970 A synthesis of Narrabeen Group nomenclature, Sydney Basin. Geological Survey of New South Wales. Quarterly Notes 1 p3-10
Usage: Mentioned (Fig. 3) Comments:
REFID: 31878 Loughnan, F.C. 1970 Flint clay in the coal-barren Triassic of the Sydney Basin, Australia. Journal of Sedimentary Petrology 40(3) p822-828
Usage: Mentioned (Table 1) Comments: Triassic
REFID: 34236 Helby, R. 1969 Aspects of stratigraphic palynology in the "Triassic" of the Sydney Basin. IN Abstracts for the second symposium in Advances in the study of the Sydney Basin, 1969. University of Newcastle. Department of Geology 1v p17-18
Usage: Mentioned (p17) Comments:
REFID: 34205 Goldbery, R. 1969 Geology of the western Blue Mountains. Geological Survey of New South Wales. Bulletin 20
Usage: Mentioned (Table 6) Comments: Correlates with Banks Wall Sandstone Member.
REFID: 34562 Ward, C.R. 1969 Palaeocurrents and petrology of the Narrabeen Group in the southern Sydney Basin. IN Abstracts for the fourth symposium in the Advances in the study of the Sydney Bsain. University of Newcastle. Department of Geology 1v p60
Usage: Mentioned (p60) Comments:
REFID: 34139 Dickson, T.W. 1969 Stratigraphy of the Narrabeen Group in the Southern Coalfields, N.S.W. IN Abstracts for the second symposium on Advances in the study of the Sydney Basin, 1969. University of Newcastle. Department of Geology 1v p23-24
Usage: Mentioned (Table) Comments: PP23-24
REFID: 34336 McElroy, C.T. 1969 Sydney Basin, Triassic system - Narrabeen Group. IN Packham G.H.(ed) - The geology of New South Wales. Geological Society of Australia. Journal 16(1) p387-393
Usage: Mentioned (Table 5.15) Comments:
REFID: 34009 Balme, B.E. 1969 The Permian-Triassic boundary in Australia. IN Dickens J.M. (ed) - The Permian of Australia Symposium. Geological Society of Australia. Special Publication 2 p99-112
Usage: Mentioned (Table III) Comments: L.Triassic
REFID: 34241 Helby, R.J. 1969 The Sydney Basin - Triassic system, Narrabeen Group: stratigraphic palynology. IN Packham G.H.(ed) - The geology of New South Wales. Geological Society of Australia. Journal 16(1) p404-405
Usage: Mentioned (p404) Comments:
REFID: 39450 Branagan, D.F. , Megaw, J.V.S. 1969 The lithology of a coastal aboriginal settlement at Curracurrang, N.S.W. Archaeology and Physical Anthropology in Oceania IV(1) p1-17
Usage: Mentioned (Fig.4) Comments:
REFID: 43383 Brunker, R.L. , Offenberg, A.C. , Rose, G. 1967 Explanatory Notes 1:3 000 000 geological map of New South Wales. Geological Survey of New South Wales 32
Usage: Not recorded (p22) Comments: Part of Clifton Sub-Group
REFID: 43344 Branagan, D.F. , McElroy, C.T. , Packham, G.H. 1967 Field geology of New South Wales Science Press 191
Usage: Not recorded (p21,68-70) Max age from reference: Triassic Comments:
REFID: 43392 Lassak, E.V. , Golding, H.G. 1967 Phosphatic bands in Narrabeen sediments Australian Journal of Science 29(7) 223-4
Usage: Not recorded (p223,224) Comments: Contains phosphatic pebbles at Thelma Head
REFID: 43323 Helby, R. 1967 Triassic plant microfossils from a shale within the Wollar Sandstone, N.S.W Royal Society of New South Wales. Journal and Proceedings 100(2) 61-73
Usage: Not recorded (p63,71) Comments: Fossils (I56-9)
REFID: 43395 Crook, K.A.W. 1957 The stratigraphy and petrology of the Narrabeen Group in the Grose River district Royal Society of New South Wales. Journal and Proceedings 90 61-79
Usage: Not recorded (p76) Comments:
Bibliographic references returned: 79
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