The British Coastal Deposits Group is a Quaternary lithostratigraphic group (a sequence of rock strata or other definable geological units) present in coastal and estuarine areas around the margins of Great Britain. They are a mix of sands, gravels, silts, clays and peat and, north of a line between the Ribble and Tyne, include glacio-eustatically raised deposits. They lie unconformably on deposits of variously the Britannia Catchments Group (with which they also interfinger), Albion Glacigenic Group, Caledonia Glacigenic Group, Dunwich Group, Crag Group or earlier bedrock. Their upper boundary is the present day ground surface.[2]
| British Coastal Deposits Group | |
|---|---|
| Stratigraphic range: Cromerian to Flandrian age | |
| Type | Group |
| Unit of | Great Britain Superficial Deposits Supergroup |
| Thickness | up to 80m |
| Lithology | |
| Primary | sand |
| Other | gravel, silt, clay. peat |
| Location | |
| Country | England, Scotland, Wales |
| Extent | British Isles (not Ireland)[1] |
References edit
- ^ Terminology as per BGS reference
- ^ "BGS Lexicon of Named Rock Units - Result Details". Bgs.ac.uk. Retrieved 17 January 2019.