| Scarborough Sandstone | |
| Period: | Triassic |
| Age: | Early-Mid Triassic ~ |
| Type: | Geological formation |
| Unitof: | Narrabeen Group |
| Underlies: | Wombarra Claystone |
| Overlies: | Stanwell Park Claystone |
| Thickness: | up to 26m (85feet) |
| Region: | New South Wales |
| Extent: | Sydney Basin |
| Namedfor: | Scarborough, New South Wales |
| Location Ts: | Illawarra |
| Country Ts: | Australia |
| Thickness Ts: | 27 |
Scarborough Sandstone is a geologic formation in the Sydney Basin in eastern Australia. Commonly seen in the Illawarra region, this stratum is up to 26 metres thick. Formed in the early Triassic, it is part of the Narrabeen Group of sedimentary rocks. This formation includes quartz-lithic sandstone, sometimes with pebbles.[1] [2]