The BGS Lexicon of Named Rock Units — Result Details

Main Limestone Group (Cumbria) [Obsolete Name And Code: Use GSCL]

Computer Code: MALG Preferred Map Code: notEntered
Status Code: Index Level
Age range: Holkerian Substage (CQ) — Pendleian Substage (CE)
Lithological Description: Dark limestones, often weathering white with subsidiary chert and sandstone.
Definition of Lower Boundary: Drawn at the base of the Seventh Limestone Formation where it rests conformably on Cockermouth Lavas (locally) elsewhere by Lower Palaeozoic Rocks.
Definition of Upper Boundary: Drawn at the conformable upward passage of the First Limestone Formation of the Hensingham Group to the grit of the Hensingham Grit Formation of the Hensingham Group.
Thickness: Not known.
Geographical Limits: West Cumberland, Maryport, (Cumbria).
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Maryport,Cumbria. 
Reference(s):
Eastwood, T, 1930. The geology of the Maryport district. Memoir of the Geological Survey of Great Britain. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E246 E245 E244 E231 E041