| Computer Code: |
LUL |
Preferred Map Code: |
LuL |
| Status Code: |
Index Level |
| Age range: |
Brigantian Substage (CX)
— Brigantian Substage (CX) |
| Lithological Description: |
[Obsolete: use LLGS] Dominantly a cyclical sequence of limestones and mudstones with thin coals and seatclays. |
| Definition of Lower Boundary: |
Rests on volcanic detritus of the Kirkwood Formation. |
| Definition of Upper Boundary: |
Passes up into mudstones of the Kilbirnie Mudstone Formation. |
| Thickness: |
20 metres, but varies laterally. |
| Geographical Limits: |
Not defined. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Kirkwood Borehole. |
| Reference(s): |
| Monro, S K. 1999. Geology of the Irvine District. Memoir of the British Geological Survey, Sheet 22W and part of 21E (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S022
S030
|
