The BGS Lexicon of Named Rock Units — Result Details

Fairy Cave Mudstone Member

Computer Code: FCM Preferred Map Code: FcM
Status Code: Pending Upgrade
Age range: Arundian Substage (CJ) — Arundian Substage (CJ)
Lithological Description: Black argillaceous limestone and mudstone.
Definition of Lower Boundary: Sharp limestone/mudstone junction, underlain by the Pant Limestone Member.
Definition of Upper Boundary: Sharp limestone/mudstone junction, overlain by the White Orr Limestone Member.
Thickness: 1.7 metres.
Geographical Limits: Not defined.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Sheet 262, Bridgend 
Fletcher, C J N. 1983. Geological notes and local details for 1:10,000 Sheets SS87SE, St. Brides Major and part of 1:50,000 Sheet 261/262 (Bridgend). British Geological Survey, Onshore Geology Series, Technical Report, WA/83/19, p.23. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: