The BGS Lexicon of Named Rock Units — Result Details

Main Limestone Member (Ballycastle, Northern Ireland)

Computer Code: MAL Preferred Map Code: MAL
Status Code: Pending Upgrade
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: Grey shale (marine fossils), limestone, sandstone.
Definition of Lower Boundary: Rapid change from massive red and white sandstones of Ballyvoy Sandstone Formation to grey shale of the member.
Definition of Upper Boundary: Shales succeeded by white, massive calcareous and micaceous sandstones.
Thickness: 12 - 20m
Geographical Limits: Data not yet available.
Parent Unit: Ballyvoy Sandstone Formation (BVYS)
Previous Name(s): Main Limestone Group (-4177)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Northeast coast of County Antrim. Coastal cliff sections east of Ballycastle. 
Reference(s):
Wilson, H E and Robbie, J A. 1966. Geology of the Country around Ballycastle. Memoir of the Geological Survey. [Belfast: HMSO.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable