| Downton Castle Sandstone | |
|---|---|
| Stratigraphic range: Silurian | |
| Type | Formation |
| Unit of | Old Red Sandstone |
| Sub-units | Lower Bone Bed Member, Platyschisma Shale Member |
| Underlies | Temeside Shale |
| Thickness | 15m in type area; 17m at Ludlow, 15-20m in South Staffordshire |
| Lithology | |
| Primary | Sandstone |
| Other | Siltstone, Mudstone |
| Location | |
| Region | England |
| Country |  United Kingdom |
The Downton Castle Sandstone is a geologic formation in England. It preserves fossils dating back to the Silurian period. As its name would suggest the formation predominantly consists of sandstone with minor siltstone and mudstone.[1] The oldest known Trigonotarbid Palaeotarbus is known from the formation.
- ^ "Downton Castle Sandstone Formation". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 24 September 2019.