The BGS Lexicon of Named Rock Units — Result Details

Mount Pleasant Group

Computer Code: MPG Preferred Map Code: notEntered
Status Code: Full, pending ratification
Age range: Frasnian Age (DR) — Famennian Age (DA)
Lithological Description: Nodular limestones and nodular calcareous shales, purple and green slates with nodules, siliceous green slates with nodules.
Definition of Lower Boundary: Drawn at the base of the nodular limestones and Calcareous Shales Formation where it rests conformably upon the Kiln Wood Beds.
Definition of Upper Boundary: Drawn at the conformable upward passage of the Siliceous Green Slates with nodules formation to the Winston Chert Formation of Upper Famennian age.
Thickness: Not known.
Geographical Limits: Chudleigh, south Devon.
Parent Unit: Not Entered (?)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Area  Chudleigh, Devon. 
House, M R and Butcher, N E, 1973. Excavations in the Devonian and Carboniferous Rocks near Chudleigh, south Devon. Transactions of the Royal Geological Society of Cornwall, Vol.20, p.199-220. 
Tucker, M E and Van Straaten P, 1970. Conodonts and facies on the Chudleigh Schwelle. Proceedings of the Ussher Society, Vol.2, p.160-170. 
Rhodes, F H T and others, 1973. Micromorphic studies of platform conodonts. Geological Society of America, Special Paper, No.141, p.117-131. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable