Crag Group
| Crag Group | |
|---|---|
| Stratigraphic range: Plio-Pleistocene ~ | |
Red Crag Formation at Bawdsey cliff, Suffolk | |
| Type | Geologic group |
| Unit of | Great Britain Superficial Deposits Supergroup |
| Sub-units | Coralline, Red, Norwich & Wroxham Crag Formations |
| Underlies | Dunwich, Albion Glacigenic, Britannia Catchments and British Coastal Deposits Groups |
| Overlies | Unconformity with Chalk Group and London Clay Formation |
| Thickness | Up to 70 m (230 ft) onshore |
| Lithology | |
| Primary | Sand |
| Other | Gravel, clay, silt, calcarenite |
| Location | |
| Region | East Anglia |
| Country | England |
| Extent | East Anglia and North Sea |
| Type section | |
| Named by | R.C. Taylor |
| Year defined | 1823 |
The Crag Group is a geological group outcropping in East Anglia, England and adjacent areas of the North Sea. Its age ranges from approximately 4.4 to 0.478 million years BP, spanning the late Pliocene and early to middle Pleistocene epochs.