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
|