The BGS Lexicon of Named Rock Units — Result Details

Greengate Well Limestone

Computer Code: GGL Preferred Map Code: notEntered
Status Code: Index Level
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: Pale grey compact even-bedded limestone and subordinate shaly calcareous mudstone.
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: c.10m maximum, thinning eastwards to about 5m; locally split by c.1.5m of calcareous shaly mudstone.
Geographical Limits: none recorded or not applicable
Parent Unit: Alston Formation (AG)
Previous Name(s): none recorded or not applicable
Alternative Name(s): School Limestone
Penton Limestone
Stratotypes:
none recorded or not applicable
Reference(s):
Lexique Stratigraphique International. 1971. Volume 1, Europe, Fascicule 3a, England, Wales and Scotland, Part 3a VII, Lower Carboniferous (Dinantian). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E018 E012 E013