The BGS Lexicon of Named Rock Units — Result Details

Foulport Mudstone Member

Computer Code: FMN Preferred Map Code: FMN
Status Code: Full
Age range: Frasnian Age (DR) — Courceyan Substage (CF)
Lithological Description: A reddish-brown silty mudstone with a few sandstones and beds with nodules of pedogenic limestone.
Definition of Lower Boundary: Conformable on the underlying Doughend Sandstone Member and marked by a change from yellow sandstone with a few concretionary nodules to red-brown mudstone and siltstone of the Foulport Mudstone Member (Monro, 1999; BGS, In preparation).
Definition of Upper Boundary: Conformable and overlain by variegated sandstones with concretions of the West Bay Cornstone Member.
Thickness: About 200m
Geographical Limits: Cumbrae Islands in Strathclyde, Scotland. Unit shown on S21W and part of 21E Irvine, in press [FMN], S29E and part 21E, Dunoon and Millport, in preparation [FMN].
Parent Unit: Kinnesswood Formation (KNW)
Previous Name(s): none recorded or not applicable
Alternative Name(s): None.
Stratotypes:
Type Area  Coast section at Foul Port, Millport Bay, Great Cumbrae, Strathclyde, Scotland. 
Reference(s):
British Geological Survey. In press. Irvine. Scotland Sheet 22W and part of 21E. Bedrock. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.) 
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. 
British Geological Survey. In preparation. Dunoon and Millport. Scotland Sheet 29E and part of 21E. Bedrock. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S021