The BGS Lexicon of Named Rock Units — Result Details

Coquet Valley Formation

Computer Code: CQU Preferred Map Code: CQU
Status Code: Full
Age range: Devensian Stage (QD) — Holocene Epoch (QH)
Lithological Description: Mainly sand and gravel forming river terraces and silty, clayey sand forming floodplains and concealing sand and gravel. Including units of silty sand, silt, clay and peat. Clasts mainly sandstone, gritstone, mudstone, limestone and coal.
Definition of Lower Boundary: Sharp, undulating, erosional contact, mainly on grey tills (diamicton) of the North Pennine or North Sea Coast Glacigenic subgroups, or on bedrock.
Definition of Upper Boundary: Ground surface, locally covered by peat.
Thickness: To 10m
Geographical Limits: The valleys of the River Coquet, Aln and Wansbeck and their tributaries, northern England
Parent Unit: Northumbria Catchments Subgroup (NCAT)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  The valleys of the River Coquet, Aln and Wansbeck and their tributaries, northern England. Bowen,1999. 
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