| Computer Code: |
RVN |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Asbian Substage (CR)
— Asbian Substage (CR) |
| Lithological Description: |
A brown or locally black, often thickly bedded with trough cross bedding, typically fine-grained, siliceous, sandstone, containing little mica or carbonaceous material, and famous building stone. |
| Definition of Lower Boundary: |
Status uncertain, but likely to be erosive on underlying argillaceous and arenaceous rocks of the Gullane Formation. |
| Definition of Upper Boundary: |
Transitional by upward fining into mainly non-marine siltstone and mudstone of the Gullane Formation. |
| Thickness: |
Up to 40 m thick in the City of Edinburgh. |
| Geographical Limits: |
Only known for certain in Edinburgh area. |
| Parent Unit: |
Gullane Formation (GUL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Ravelston Quarry, Edinburgh. |
| Reference(s): |
| Mitchell, G H. 1962. The geology of the neighbourhood of Edinburgh. (Explanation of Sheet 32) Third Edition. (Reprinted 1980). Memoir of the Geological Survey of Great Britain (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S032
|
