| Computer Code: |
NCAT |
Preferred Map Code: |
NCAT |
| Status Code: |
Full |
| Age range: |
Devensian Stage (QD)
— Holocene Epoch (QH) |
| Lithological Description: |
A suite of fluvial, lacustrine, mass movement, periglacial and aeolian deposits that contain clasts derived from rocks cropping out in northeastern England (mainly sandstone, gritstone, mudstone, limestone and coal), including alluvium, river terrace deposits, peat, head and blown sand. |
| Definition of Lower Boundary: |
Unconformable contact with units of the North Pennine and North Sea Coast Glacigenic subgroups, and with bedrock. |
| Definition of Upper Boundary: |
Generally the ground surface, but units of this Subgroup locally interfinger with units of the British Coastal Deposits Group. |
| Thickness: |
To 25m |
| Geographical Limits: |
Northumberland, County Durham and northern Richmondshire east of the Pennine watershed. |
| Parent Unit: |
Britannia Catchments Group (BCAT)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Northumberland and County Durham east of the Pennine watershed. Bowen, 1999. See also the stratotypes of constituent formations. |
| Reference(s): |
| 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. |
| Boulton, G S. 1992. Quaternary. 413-444 in Geology of England and Wales. Duff, P M D, and Smith, A J (editors). (London: The Geological Society.) |
| 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 |
