The BGS Lexicon of Named Rock Units — Result Details

Ogofgolchfa Group

Computer Code: PVO Preferred Map Code: PVO
Status Code: Pending Upgrade
Age range: Ediacaran Period (AD) — Ediacaran Period (AD)
Lithological Description: Dark green and purple chloritic slates, felsic tuffs and tuffaceous sedimentary rocks.
Definition of Lower Boundary: Appears to overlie the andesitic and basaltic tuffs and lavas of the Rhosson Group conformably.
Definition of Upper Boundary: Overlain unconformably by Cambrian strata.
Thickness: At least 100m
Geographical Limits: Pembrokeshire: 1:50,000 Sheet 209 (St.David's).
Parent Unit: Pebidian Supergroup (PN)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Type Section  Ogofgolchfa, Whitesands Bay. 2.3km northwest of St David's. Bevins, R E and Horak J. 2000. 
Earp, J R. 1973. St David's Solid. 1:25 000, Geological Special Sheet, England and Wales. [London: Institute of Geological Sciences.] 
Bevins, R E amd Horak, J. 2000. St David's Peninsula. 131-136 in Carney, J (Editor), Precambrian Rocks of England and Wales. Geological Conservation Review Series, 20. [Peterborough: Joint Nature Conservation Committee.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used: