Otter Sandstone Formation
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.
| 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 |
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