Tamar Group
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The Tamar Group is an early Devonian to early Carboniferous geologic group in south Devon and north Cornwall in southwest England. The name is derived from the valley of the River Tamar on the Devon/Cornwall border. The Group comprises (in ascending order) the Torquay Limestone, Tavy and Burraton formations.[1] Some of the rocks are fossiliferous.
TypeGroup
Sub-unitsBurraton Formation, Tavy Formation, Torquay Limestone
UnderliesChudleigh Group (faulted)
OverliesMeadfoot Group
| Tamar Group | |
|---|---|
| Stratigraphic range: Emsian-Tournaisian | |
| Type | Group |
| Sub-units | Burraton Formation, Tavy Formation, Torquay Limestone |
| Underlies | Chudleigh Group (faulted) |
| Overlies | Meadfoot Group |
| Thickness | over 6,700 m (22,000 ft) on N Cornish coast |
| Lithology | |
| Primary | Mudstone |
| Other | Siltstone, sandstone, limestone, spilite, hyaloclastite, tuff |
| Location | |
| Region | England |
| Country | United Kingdom |
| Extent | south Devon to north Cornwall |
| Type section | |
| Named for | valley of River Tamar |
