Global InformationWombarra Claystone information
| Wombarra Claystone | |
|---|---|
| Stratigraphic range: late Permian to early Triassic | |
 below the Sea Cliff Bridge, Australia | |
| Type | Geological formation |
| Unit of | Narrabeen Group |
| Underlies | Scarborough Sandstone |
| Overlies | Bulli Coal |
| Thickness | up to 30 metres (100 ft) |
| Lithology | |
| Primary | shale |
| Other | quartz-lithic sandstone |
| Location | |
| Region | New South Wales |
| Country |  Australia |
| Extent | Sydney Basin |
| Type section | |
| Named for | Wombarra, New South Wales |
| Location | Illawarra |
| Country | Australia |
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]
- ^ "Wombarra Claystone". Geo Science Australia. Australian Government. Retrieved 3 May 2024.
- ^ 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