| Computer Code: |
CPHL |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Asbian Substage (CR)
— Brigantian Substage (CX) |
| Lithological Description: |
Three limestones separated by clastic beds. |
| Definition of Lower Boundary: |
none recorded or not applicable
|
| Definition of Upper Boundary: |
none recorded or not applicable
|
| Thickness: |
Total grouping is about 25m thick. |
| Geographical Limits: |
Northumberland; type area around Gunnerton. |
| Parent Unit: |
Tyne Limestone Formation (TYLS)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Lexique Stratigraphique International. 1971. Volume 1, Europe, Fascicule 3a, England, Wales and Scotland, Part 3a VII, Lower Carboniferous (Dinantian). |
| Frost, D V. 1969. The Lower Limestone Group (Visean) of the Otterburn district, Northumberland. Proceedings of the Yorkshire Geological Society, Vol.37, 294. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
