| Computer Code: |
CKN |
Preferred Map Code: |
CKN |
| Status Code: |
Full |
| Age range: |
Brigantian Substage (CX)
— Langsettian Substage (CA) |
| Lithological Description: |
Sequences of sandstones, siltstones, mudstones, limestones, ironstones, coals and seatrocks; commonly cyclic; marine faunas common in lower parts of cycles. |
| Definition of Lower Boundary: |
Drawn at base of lowest limestone of the Lower Limestone Formation; normally conformable. |
| Definition of Upper Boundary: |
Drawn at conformable upward passage from Passage Formation to Lower Coal Measures. |
| Thickness: |
Up to about 1500m. |
| Geographical Limits: |
Midland Valley of Scotland. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
See type sections of component units: Lower Limestone Formation, Limestone Coal Formation, Upper Limestone Formation; other formations in Ayrshire (eg Lower Limestone Formation, TS: Wester Gartshore Borehole NS67SE/99, from 82-293m depth. |
| Type Area |
Clackmannan Syncline, Scotland. |
| Reference(s): |
| Forsyth, I H, Hall, I H S and McMillan, A A. 1996. Geology of the Airdrie district. Memoir of the British Geological Survey, Sheet 31W (Scotland). |
| Cameron, I B and Stephenson, D, 1985. British Regional Geology: The Midland Valley of Scotland (3rd Edition). (London: HMSO for British Geological Survey). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S012
S015
S015
S023
S024
S033
S034
S049
S040
S030
S030
S039
S039
S040
E001
E002
|
