Quaternary lithostratigraphic group in Great Britain
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]
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]
^Terminology as per BGS reference
^"BGS Lexicon of Named Rock Units - Result Details". Bgs.ac.uk. Retrieved 17 January 2019.
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overlain by deposits of the Albion Glacigenic Group and sometimes by those of the Britannia Catchments Group or BritishCoastalDepositsGroup and interfingers...
Glacigenic Group, the Britannia Catchments Group or the BritishCoastalDepositsGroup. It was previously known as the South Britain Glacigenic Group or Older...
unconformable contact with the Britannia Catchments Group or the BritishCoastalDepositsGroup. The following subgroups are defined: Shetland Glacigenic Subgroup...
day ground surface but it interfingers locally with the BritishCoastalDepositsGroup. The group is subdivided into more geographically restricted subgroups...
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