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
|