The BGS Lexicon of Named Rock Units — Result Details

Stockdale Group [Obsolete Code: Use STK]

Computer Code: SCSH Preferred Map Code: SCSH
Status Code: Index Level
Age range: Llandovery Epoch (SL) — Llandovery Epoch (SL)
Lithological Description: Includes Skelgill and Browgill Formations as separately defined: dominantly mudstone.
Definition of Lower Boundary: Unconformably overlies the Red Gill Formation of the Dent Group.
Definition of Upper Boundary: Conformably overlain by the Brathay Formation.
Thickness: About 50 metres.
Geographical Limits: Southern Lake District and north-west Pennines.
Parent Unit: Windermere Supergroup (WIN)
Previous Name(s): Stockdale Shale Formation (-2413)
Stockdale Shales, Undivided (-3661)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Stockdale Beck. (Reference sections: as defined for component formations, Skelgill and Browgill formations). 
Reference(s):
Moseley F. 1984. Lower Palaeozoic lithostratigraphical classification in the English Lake District. Geological Journal, Vol. 19, p. 239-247. 
Marr, J E and Nicholson, H A, 1888. The Stockdale Shales. Quarterly Journal of the Geological Society of London, Vol.44, p.654-732. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E038