The BGS Lexicon of Named Rock Units — Result Details
Kilbirnie Mudstone Member
| Computer Code: | KLMD | Preferred Map Code: | KLMD |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pendleian Substage (CE) — Pendleian Substage (CE) | ||
| Lithological Description: | Mostly dark grey mudstone with ironstone, sporadic shelly marine bands, and also siltstone, medium-grained rooty grey sandstone and coal. The strata occur in upward-coarsening cycles, some capped by thin coal beds. The member includes the Dalry Clayband Ironstone, a grey argillaceous ironstone, and the Johnstone Shell Bed mudstone, with a marine brachiopod and bivalve fauna. | ||
| Definition of Lower Boundary: | Taken at the top of the Top Hosie Limestone, the highest group of thin limestones characterized by the presence of Posidonia corrugata. | ||
| Definition of Upper Boundary: | Taken at the lithological change from mudstone of the Kilbirnie Mudstone Member to the overlying dominantly sandstone-bearing cyclical sequences of the parent Limestone Coal Formation. The upper boundary is diachronous. | ||
| Thickness: | c.35m | ||
| Geographical Limits: | Presently used within north Ayrshire. | ||
| Parent Unit: | Limestone Coal Formation (LSC) | ||
| Previous Name(s): | Limestone Coal Group [Obsolete Name and Code: Use DLST, LSC, KLMD]
(-2759)
Kilbirnie Mudstone Formation [Obsolete Name and Code: Use KLMD] (-1625) |
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| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Section | Paduff Burn, starting 200m north of Place [NS 3028 5483] to the centre of Kilbirnie [NS 3148 5450] Monro, 1999. | ||
| Reference(s): | |||
| Paterson, I B, Hall, I H S and Stephenson, D. 1990. Geology of the Greenock district: Memoir for 1:50000 geological sheet 30W and part of sheet 29E (Scotland). | |||
| 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. | |||
| Monro, S K. 1999. Geology of the Irvine District. Memoir of the British Geological Survey, Sheet 22W and part of 21E (Scotland). | |||
| Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. | |||
| Browne, M A E, Dean, M T, Hall, I H S, McAdam, A D Monro, S K, and Chisholm, J I. 1999. A lithostratigraphical framework for the Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Research Report RR/99/07. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| S022 S030 S022 | |||