The BGS Lexicon of Named Rock Units — Result Details

Lawmuir Formation

Computer Code: LWM Preferred Map Code: LWM
Status Code: Full
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: Cyclothemic sequence of mudstone, siltstone, sandstone with seatearths, coals and marine limestones. Marine bands in upper part, conglomerate in lowest part in some areas.
Definition of Lower Boundary: Rests on volcanic detritus (Kirkwood Formation) in type section; on Clyde Plateau Volcanic Formation in some areas.
Definition of Upper Boundary: At base of Hurlet Limestone (base of Lower Limestone Formation) as in type section.
Thickness: 254.52m in type section.
Geographical Limits: Neighbourhood of Lawmuir, Clydebank, Strathclyde, Scotland.
Parent Unit: Strathclyde Group (SYG)
Previous Name(s): Upper Sedimentary Group (-4776)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  British Geological Survey Lawmuir Borehole (BGS Reg.No. NS57SW/162) from 11.75 to 266.20m. 
Reference(s):
Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. 
Paterson, I B and Hall, I H S, 1986. Lithostratigraphy of the late Devonian and early Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Report, 18/3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S030 S031 S003 S023 S013 S015 S338 S023 S030 S039