The BGS Lexicon of Named Rock Units — Result Details

Northumbria Catchments Subgroup

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):
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.] 
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