Sherwood Sandstone Group
The Sherwood Sandstone Group is a Triassic lithostratigraphic group (a sequence of rock strata) which is widespread in Britain, especially in the English Midlands. The name is derived from Sherwood Forest in Nottinghamshire which is underlain by rocks of this age. It has economic importance as the reservoir of the Morecambe Bay gas field, the second largest gas field in the UK.
| Sherwood Sandstone Group | |
|---|---|
| Stratigraphic range: | |
St Bees Sandstone, St Bees South Head, Cumbria | |
| Type | Group |
| Unit of | New Red Sandstone Supergroup |
| Sub-units | Bromsgrove Sandstone, Wildmoor Sandstone, Kidderminster, Chester, Kinnerton Sandstone, Tarporley Siltstone, Helsby Sandstone, Upper Mottled Sandstone and Lower Mottled Sandstone formations |
| Underlies | Mercia Mudstone Group |
| Overlies | Roxby Formation, Cumbrian Coast Group and others |
| Thickness | over 1500m |
| Lithology | |
| Primary | sandstone |
| Other | mudstone, siltstone, conglomerate |
| Location | |
| Country | England |
| Extent | widespread |
| Type section | |
| Named for | Sherwood Forest |
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