The BGS Lexicon of Named Rock Units — Result Details

Drygill Formation

Computer Code: DRSH Preferred Map Code: DrSh
Status Code: Full
Age range: Longvillian Substage (OL) — Longvillian Substage (OL)
Lithological Description: Mudstone and shale, grey to black, calcareous, fossiliferous. Locally extensively bleached.
Definition of Lower Boundary: Not seen: faulted.
Definition of Upper Boundary: Not seen.
Thickness: Approximately 200m exposed; true total thickness not known.
Geographical Limits: Confined entirely to a small outlier on north side of Carrock Fell (Lake District), Cumbria, British Geological Survey, 1:50k sheet 23 (Cockermouth).
Parent Unit: Windermere Supergroup (WIN)
Previous Name(s): Drygill Shales (-1516)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Drygill Beck and surrounding Fellside, north side of Carrock Fell, Northern Lake District, Cumbria. 
Reference(s):
Eastwood,T, Hollingworth, S E, Rose, W C C and Trotter, F M. 1968. Geology of the country around Cockermouth and Caldbeck. Memoir of the Geological Survey of Great Britain, England and Wales, Sheet 23. 
Dean, W T, 1963. The Stile End Beds and Drygill Shales in the east and north of the English Lake District. Bulletin of the British Museum of Natural History, Vol.9, No.3, pp47-65. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E023