The BGS Lexicon of Named Rock Units — Result Details

Hensingham Group [Obsolete Name And Code: Use SMGP]

Computer Code: HGP Preferred Map Code: HGP
Status Code: Index Level
Age range: Namurian Stage (CN) — Namurian Stage (CN)
Lithological Description: Cyclical repetition of sandstones, siltstones, mudstones and subordinate limestones and rare coals.
Definition of Lower Boundary: Conformable: at top of First Limestone.
Definition of Upper Boundary: Conformable: base of Subcrenatum Marine Band or equivalent.
Thickness: Approximately 200m
Geographical Limits: Includes the area of British Geological Survey 1:50 000 Sheets 22 (Maryport), 23 (Cockermouth), 28 (Whitehaven).
Parent Unit: Not Entered (?)
Previous Name(s): Beds Included In 'Millstone Grit' (-2845)
Alternative Name(s): Stainmore Formation
Stratotypes:
Type Area  Hensingham, West Cumbria. 
Reference(s):
Eastwood, T, 1930. The geology of the Maryport district. Memoir of the Geological Survey of Great Britain. 
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. 
Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E022 E023 E047 E028