| Computer Code: |
WBC |
Preferred Map Code: |
WBC |
| Status Code: |
Full |
| Age range: |
Tournaisian Age (CT)
— Tournaisian Age (CT) |
| Lithological Description: |
Sandstone, yellow with red and green mottling, with carbonate-cemented (cornstone) concretions. |
| Definition of Lower Boundary: |
The lower boundary conformably overlies the red-brown silty mudstone, with carbonate-cemented concretions, of the Foul Port Mudstone Member, Kinnesswood Formation. |
| Definition of Upper Boundary: |
The upper boundary is conformably overlain by a grey mudstone sequence with ferroan dolostone beds of the Ballagan Formation. |
| Thickness: |
Approximately 16 m. |
| Geographical Limits: |
The West Bay Cornstone Member is known only on the island of Great Cumbrae, where it is exposed on the south coast of the island adjacent to West Bay Road, Millport. The member is mapped at outcrop to underlie the town of Millport. The outcrop is limited to the east by the Kaimes Bay Fault where the member is part of the hanging-wall sequence. |
| Parent Unit: |
Kinnesswood Formation (KNW)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
The type section is coastal exposures on the southern side of Great Cumbrae Island, Strathclyde region. The entire member, including the lower and upper boundaries, is exposed on the coast at the south-west end of the town of Millport [NS 157 543 to 156 542] (see Monro, 1999). |
| Reference(s): |
| 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. |
| British Geological Survey. 2002a. Hawk's Nib and Little Cumbrae - west. Scotland Sheet NS15SW. Solid and Drift. 1:10 000. (Edinburgh: British Geological Survey.) |
| British Geological Survey. 2002b. Hunterston, Millport and Little Cumbrae - east. Scotland Sheet NS15SE. Solid and Drift. 1:10 000. (Edinburgh: British Geological Survey.) |
| British Geological Survey. 2002c. Great Cumbrae - east. Scotland Sheet NS15NE. Solid and Drift. 1:10 000. (Edinburgh: British Geological Survey.) |
| British Geological Survey. 2005. Irvine. Scotland Sheet 22W, part 21E. Bedrock. 1:50 000. (Keyworth, Nottingham: British Geological Survey.) |
| Monro, S K. 1999. Geology of the Irvine District. Memoir of the British Geological Survey, Sheet 22W and part of 21E (Scotland). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
