The BGS Lexicon of Named Rock Units — Result Details

Laggan Cementstone Formation

Computer Code: LNCF Preferred Map Code: LNCF
Status Code: Pending Upgrade
Age range: Tournaisian Stage (CT) — Tournaisian Stage (CT)
Lithological Description: Grey mudstone with thin beds of dolomitic limestone.
Definition of Lower Boundary: Transition from Millstone Point Sandstone.
Definition of Upper Boundary: Unconformably overlain by Laggan Cottage Mudstone.
Thickness: c.20 metres.
Geographical Limits: Not defined.
Parent Unit: Inverclyde Group (INV)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Arran Special Sheet. 
Paterson, I B, and Hall, I H S. 1986. Stratigraphy of the Upper Devonian and Lower Carboniferous in the Midland Valley of Scotland. Report of the British Geological Survey, 18/3. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: