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Wombarra Claystone

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Wombarra Claystone
Stratigraphic range: late Permian to early Triassic
TypeGeological formation
Unit ofNarrabeen Group
UnderliesScarborough Sandstone
OverliesBulli Coal
Thicknessup to 30 metres (100 ft)
Lithology
Primaryshale
Otherquartz-lithic sandstone
Location
RegionNew South Wales
Country Australia
ExtentSydney Basin
Type section
Named forWombarra, New South Wales
LocationIllawarra
CountryAustralia

Wombarra Claystone is a geologic formation in the Sydney Basin in eastern Australia. Commonly seen in the Illawarra region, this stratum is up to 30 metres thick. Formed in the late Permian to the early Triassic, it is part of the Narrabeen Group of sedimentary rocks. This formation includes grey shale, and minor quartz-lithic sandstone.[1][2]

See also

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References

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  1. ^ "Wombarra Claystone". Geo Science Australia. Australian Government. Retrieved 3 May 2024.
  2. ^ 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