Otter Sandstone Formation

Otter Sandstone Formation (OS) Stratigraphic range: Triassic, Anisian
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: c.160m. Taunton district: 30 to 60m
Location
Region	England
Country	United Kingdom

The Otter Sandstone Formation is an obselete geological unit in England, now referred to as the Helsby Sandstone Formation. It preserves fossils dated to the Triassic, Anisian period.