| Computer Code: |
CCAG |
Preferred Map Code: |
CCA |
| Status Code: |
Full |
| Age range: |
Mid Pleistocene (QPM)
— Mid Pleistocene (QPM) |
| Lithological Description: |
A suite of mappable units of diamicton, gravel, sand, silt and clay, typically yellowish or greyish brown and containing clasts derived from the Lake District, Shap Fell and the Howgill Fells, including welded tuff (Borrowdale Volcanic Formation), slate, granite, granophyre, limestone and sandstone. |
| Definition of Lower Boundary: |
Unconformable on bedrock. |
| Definition of Upper Boundary: |
Locally the ground surface, but generally overlain unconformably by deposits of gravel, sand, silt, clay and peat of the Central Cumbria Glacigenic Subgroup. |
| Thickness: |
Up to 10 m. |
| Geographical Limits: |
The central Lake District, Shap Fell and the Howgill Fells. |
| Parent Unit: |
Albion Glacigenic Group (ALBI)
|
| Previous Name(s): |
Central Cumbria Drift Group [Obsolete Name And Code: Use CCGL Or CCAG]
(CCDR)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
The central Lake District, Shap Fell and the Howgill Fells. Merritt and Auton, 2000. For type sections see details of individual formations and members, including Thornsgill Till Formation, Troutbeck Palaeosol Bed and Maudsyke Till Member. |
| Reference(s): |
| Merrit, J W and Auton, C A. 2000. An outline of the lithostratigraphy and depositional history of Quaternary deposits in the Sellafield district, west Cumbria. Proceedings of the Yorkshire Geological Society, Vol.53, 129-154 |
| McMillan, A A and Hamblin, R J O, 2000. A mapping-related lithostratigraphical framework for the Quaternary of the UK, Quaternary Newsletter, 92, 21-34. |
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
