The BGS Lexicon of Named Rock Units — Result Details

Monkcastle Sandstone Formation

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 (-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