| Computer Code: |
RVR |
Preferred Map Code: |
RR |
| Status Code: |
Index Level |
| Age range: |
Bolsovian Substage (CC)
— Bolsovian Substage (CC) |
| Lithological Description: |
A medium to thickly bedded, grey, fine- to medium-grained, ripple cross-laminated, yellowish brown sandstone, with some red staining and iron-rich concretions. |
| Definition of Lower Boundary: |
Sharp upward change in a conformable succession from predominantly grey mudstone to sandstone - base of first sandstone above the fine- to medium-grained Wickersley Rock. |
| Definition of Upper Boundary: |
Sharp upward change in a conformable succession from sandstone to predominantly mudstone - top of the last sandstone bed below the Permian unconformity, marked by the occurrence of the Yellow Sands Formation (formerly Basal Permian Sand). |
| Thickness: |
0 to 30m |
| Geographical Limits: |
Eastnortheast of Rotherham, around the village of Ravenfield [SK4850 9515], South Yorkshire. |
| Parent Unit: |
Pennine Upper Coal Measures Formation (PUCM)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Disconnected sections in bed of Firsby Brook, 1km northeast of Ravenfield, South Yorkshire; neither top nor bottom seen. Mitchell et al. 1947. |
| Reference Section |
Section in Ravenfield Quarry shows upper 5m of sandstone including top; Ravenfield Quarry 500m north of Ravenfield. Mitchell et al. 1947. |
| Reference(s): |
| Mitchell, G H, Stephens, J V, Bromehead, C E N and Wray, D A. 1947. Geology of the Country around Barnsley. Memoir of the British Geological Survey, Sheet 87 (England and Wales). |
| Geological Survey of Great Britain. 1932. Summary of Progress for 1931. (London: Her Majesty's Stationery Office.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E087
E100
|
