| Computer Code: |
BCAT |
Preferred Map Code: |
CAT |
| Status Code: |
Full |
| Age range: |
Mid Pleistocene Epoch (QPM)
— Holocene Epoch (QH) |
| Lithological Description: |
Clays, silt, sands, gravels and peat. Gravels are composed of clasts derived from rocks cropping out throughout Great Britain and the Isle of Man. |
| Definition of Lower Boundary: |
Unconformable contact with units of the Albion Glacigenic Group, the Caledonia Glacigenic Group, the Dunwich Group, the Crag Group or bedrock. |
| Definition of Upper Boundary: |
Generally the ground surface, but locally units of this group interfinger with units of the British Coastal Deposits Group. |
| Thickness: |
Up to 100 m. |
| Geographical Limits: |
Great Britain and the Isle of Man. |
| Parent Unit: |
Great Britain Superficial Deposits Supergroup (GBG)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Great Britain and the Isle of Man. See also the stratotypes of constituent subgroups and formations. |
| Reference(s): |
| McMillan, A A, Hamblin, R J O, and Merritt, J W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03. 343pp. |
| Boulton, G S. 1992. Quaternary. 413-444 in Duff, P M D and Smith, A J (eds) Geology of England and Wales. [London: The Geological Society.] |
| Boulton, G S, Peacock, J D and Sutherland, D G. 2002. Quaternary. 409-430 in Trewin, N H [editor], Geology of Scotland. [4th edition]. [London: The Geological Society.] |
| McMillan, A A, Hamblin, R J O and Merritt, J W. 2005. An overview of the lithostratigraphical framework for the Quarternary and Neogene deposits of Great Britain (onshore). British Geological Survey Research Report RR/04/04. |
| Bowen, D Q. 1999. A revised correlation of Quaternary deposits in the British Isles. Geological Society Special Report, No. 23. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
