| Computer Code: |
CNB |
Preferred Map Code: |
CnB |
| Status Code: |
Full |
| Age range: |
Cisuralian Epoch (PLC)
— Cisuralian Epoch (PLC) |
| Lithological Description: |
Olivine basalt lava flows interbedded with thin breccias and sandstones. |
| Definition of Lower Boundary: |
Rests with irregular contact on Carboniferous Coal Measures strata. |
| Definition of Upper Boundary: |
Overlain by sandy breccias and sandstone of the Durisdeer Formation. |
| Thickness: |
20m. |
| Geographical Limits: |
Between Glenvalentine (NS 880 077) and Thornhill area (NX 880 950) in the Thornhill Basin; also at Locherben (NX 953 970). |
| Parent Unit: |
Stewartry Group (STEW)
|
| Previous Name(s): |
Permian Basal Lavas [Obsolete Name And Code: Use CNB]
(PBLV)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Section in Carron Water 500m south-east of Drumcruilton. |
| Reference(s): |
| Brookfield, M E. 1978. Revision of the Stratigraphy of Permian and Supposed Permian Rocks of Southern Scotland. Geologische Rundschau, Vol. 67, 110-143. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S009
S015
S015
|
