The BGS Lexicon of Named Rock Units — Result Details

Great Mine Limestone

Computer Code: GML Preferred Map Code: notEntered
Status Code: Full
Age range: Asturian Substage (CAS) — Asturian Substage (CAS)
Lithological Description: Limestone [no further details currently available]
Definition of Lower Boundary: The lower boundary is taken at the base of the first limestone-dominated unit above the base of the mudstone and sandstone of the Halesowen Formation.
Definition of Upper Boundary: The upper boundary is taken at the base of a mudstone and sandstone dominated succession of the Halesowen Formation above limestone of the Great Mine Limestone.
Thickness: 1.5 to 2.7m
Geographical Limits: Between Ancoats [SJ 8560 9865] and Belle Vue [SJ 8740 9640], Greater Manchester.
Parent Unit: Halesowen Formation (HA)
Previous Name(s): Main Limestone (ML)
Three Yards Limestone (-287)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  A complete section was formerly exposed in exposures along the River Medlock (east Manchester); presently unexposed. Roeder, 1890. 
Reference(s):
Tonks, L H, Jones, R C B, Lloyd, W and Sherlock, R L, 1931. The geology of Manchester and the south-east Lancashire Coalfield. Memoir of the Geological Survey of England and Wales. 
Roeder, C, 1890, Notes on the Upper Coal Measures at Slade Lane, Burnage. Transactions of the Manchester Geological Society, Vol.21, 114-136. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E085