The BGS Lexicon of Named Rock Units — Result Details

Ratcliffe Volcanic Member

Computer Code: RAVO Preferred Map Code: RaV
Status Code: Full
Age range: Brigantian Substage (CX) — Brigantian Substage (CX)
Lithological Description: Chip samples indicate a sequence of olive green to brown silty carbonaceous mudstones and limestones with beds of bluish grey, pyritous tuff.
Definition of Lower Boundary: At base of the lowest tuff bed at 631m depth in Ratcliffe on Soar borehole.
Definition of Upper Boundary: At top of the highest tuff bed, at 507m depth in Ratcliffe on Soar borehole
Thickness: 124m
Geographical Limits: Does not crop out.
Parent Unit: Widmerpool Formation (WDF)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Ratcliffe on Soar borehole, between 507m and 631m depth (not cored). 
Reference(s):
Carney, J N and Cooper, A H, 1997. Geology of the West Leake area: 1:10 000 Sheet SK52NW. British Geological Survey Technical Report WA/97/46. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E142 E141