Otter Sandstone Formation
| Otter Sandstone Formation (OS) | |
|---|---|
| Stratigraphic range: Anisian | |
Exposures of Otter Sandstone at Ladram Bay, Devon, England | |
| Type | Formation |
| Unit of | Sherwood Sandstone Group (SSG) |
| Underlies | In coastal exposures, transitional into overlying Mercia Mudstone. |
| Overlies | Budleigh Salterton Pebble Beds |
| Thickness | Coast and Exeter district: ~160 m (520 ft) Taunton district: 30–60 m (98–197 ft) |
| Location | |
| Region | England |
| Country | United Kingdom |
The Otter Sandstone Formation is an obsolete geological unit in England, now referred to as the Helsby Sandstone Formation. It preserves fossils dated to the Triassic, Anisian period.