The BGS Lexicon of Named Rock Units — Result Details

Crow Cherts

Computer Code: CRC Preferred Map Code: CrC
Status Code: Pending Upgrade
Age range: Pendleian Substage (CE) — Pendleian Substage (CE)
Lithological Description: Sequence of chert, cherty limestone, limestone and mudstone in very variable proportions.
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: none recorded or not applicable
Geographical Limits: Typically in the Arkendale area of Yorkshire; locally in the Richmond and Kirby Stephen districts.
Parent Unit: Stainmore Formation (SMGP)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Dakyns, J R, et al, 1891. The geology of the country around Mallerstang, with parts of Wensleydale, Swaledale and Arkendale. Memoir of the Geological Survey of England and Wales. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E040 E041