| Computer Code: |
MKS |
Preferred Map Code: |
MKS |
| Status Code: |
Full |
| Age range: |
Namurian Stage (CN)
— Namurian Stage (CN) |
| Lithological Description: |
A medium- to coarse-grained sandstone, with seatearth and seatclay; subsidiary siltstone and mudstone |
| Definition of Lower Boundary: |
Taken at the lithological change channel-fill, upward-fining sandstones to the cyclical, upward-coarsening sequence of clastic strata with marine limestones in the underlying Upper Limestone Formation |
| Definition of Upper Boundary: |
Taken at the base of the Troon Volcanic Formation; defined by the lithological change from basaltic lavas to clastic strata of the underlying Monkcastle Sandstone Formation |
| Thickness: |
About 45 m thick. |
| Geographical Limits: |
Presently used within north Ayrshire |
| Parent Unit: |
Clackmannan Group (CKN)
|
| Previous Name(s): |
Passage Group [Obsolete Name and Code: Use MKS, PGP]
(-4194)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
British Geological Survey Diddup Borehole. |
| Type Section |
Ceaf Water, 1 km SW of Dalry |
| Reference(s): |
| Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D, and Monro, S K. 1995. A review of the lithostratigraphy of the Carboniferous rocks of the Midland Valley of Scotland. BGS Technical Report WA/95/25R. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S022
|
