| Bearreraig Sandstone Formation | |
| Type: | Formation |
| Age: | Toarcian-Bajocian ~ |
| Period: | Toarcian |
| Prilithology: | Calcareous sandstone |
| Otherlithology: | Limestone, mudstone |
| Namedfor: | Bearreraig Bay |
| Region: | Hebrides Basin, Inner Hebrides, Ardnamurchan, Scotland |
| Coordinates: | 57.5°N -6.1°W |
| Paleocoordinates: | 45.9°N 4.6°W |
| Unitof: | Hebrides Basin |
| Subunits: | Druim An Fhurain Sandstone Member, Garantiana Mudstone Member |
| Underlies: | Cullaidh Shale Formation |
| Overlies: | Raasay Ironstone Formation |
| Thickness: | up to 488m (1,601feet) |
The Bearreraig Sandstone Formation is a geological formation in Scotland. It preserves fossils dating back to the lower to middle parts of the Jurassic period (Toarcian–Bajocian).[1] The remains of the proximal portion of a right ulna and radius of an indeterminate thyreophoran dinosaur are known from the formation.[2] The ichthyosaur Dearcmhara is also known from the formation.[3]