Bringelly Shale
| Bringelly Shale | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Wiannamatta group |
| Underlies | Ashfield Shale |
| Overlies | Hawkesbury sandstone, Minchinbury Sandstone |
| Thickness | up to 60 metres (200 ft) |
| Lithology | |
| Primary | Shale |
| Other | Sandstone |
| Location | |
| Location | Western Sydney |
| Region | LGAs of Liverpool, Penrith and Fairfield |
| Country | Australia |
| Type section | |
| Named for | Bringelly |
Bringelly Shale is a component of the Wianamatta group of sedimentary rocks in the Sydney Basin of eastern Australia. Formed in the Middle Triassic Period, it has an extensive outcrop in the western parts of Sydney and occupies around one third of the Sydney sheet.
Occupying much of the Cumberland Plain, the shale has its greatest geographical extent at Bringelly (its namesake), near the suburb of Liverpool. Featuring sandstone lentils, it is the topmost layer of the Wianamatta Group and the youngest Triassic sedimentary rock unit in the Sydney Basin.