The BGS Lexicon of Named Rock Units — Result Details

Prince Rock Member

Computer Code: PRK Preferred Map Code: PrkM
Status Code: Full
Age range: Eifelian Age (DI) — Givetian Age (DV)
Lithological Description: Thin- to medium-bedded, fine- to medium-grained skeletal wackestone and packstone with stylolitic mudstone partings and interbeds. Coarser crinoidal lithologies occur in lower part and form basal lags of graded and cross-stratified packstone beds that are common in upper part. The limestone is typically dark grey and foetid.
Definition of Lower Boundary: Basal mudstones conformably succeed the Faraday Road Member.
Definition of Upper Boundary: Succeeded by red and black reef limestone of late Givetian age of the undivided Plymouth Limestone Formation.
Thickness: none recorded or not applicable
Geographical Limits: Coxside area of Plymouth (geological sheet 348) and Prince Rock area of Plymouth (geological sheet 349).
Parent Unit: Plymouth Limestone Formation (PYL)
Previous Name(s): Plymouth Limestone (-901)
Alternative Name(s): none recorded or not applicable
Reference Section  Sea cliffs, Coxside: East Pier to Dearman's Bay. 
Leveridge B E, Holder, M T, Goode, A J J, Scrivener R C, Jones N S and Merriman, R J. 2002. Geology of the Plymouth and south-east Cornwall area. Memoir of the British Geological Survey, Sheet 348 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used: