| Computer Code: |
ISP |
Preferred Map Code: |
ISP |
| Status Code: |
Full |
| Age range: |
Ludlow Epoch (SU)
— Early Devonian Epoch (DL) |
| Lithological Description: |
A greyish, clast-supported, pebble conglomerate with mainly fine-grained greywacke sandstone pebbles and cobbles but also clasts of chert, siltstone, granular sandstone, limestone and granite and with thin intercalations and lenses of greyish medium- and coarse-grained sandstone. |
| Definition of Lower Boundary: |
Pebble conglomerates of at least 1m thickness sharply overlying red-brown fine- and medium-grained sandstone, towards the top of the Swanshaw Sandstone Formation. |
| Definition of Upper Boundary: |
Pebble conglomerates are conformably succeeded by greyish medium- and fine-grained sandstones, towards the top of the Swanshaw Sandstone Formation. |
| Thickness: |
About 30m |
| Geographical Limits: |
South Ayrshire, Scotland. |
| Parent Unit: |
Swanshaw Sandstone Formation (SWAS)
|
| Previous Name(s): |
Part of the 'Sedimentary Group' of the Lower Old Red Sandstone [Obsolete Name and Code: Use ISP]
(-1617)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Partial Type Section |
The basal part of the member is exposed in the tributary to Craigencroy Glen.The top is exposed in cliffs north east of Fairy's Well. |
| Reference(s): |
| Eyles, V A, Simpson, J B and Macgregor, M C. 1949. Geology of Central Ayrshire. Memoir of the Geological Survey of Scotland, British Geological Survey, Sheet 14 (Scotland). |
| Smith, R A. 1999. Geology of the Croy area. Explanation of 1:10,000 Sheet NS 21 SE/SW. British Geological Survey Technical Report WA/00/13. |
| Smith, J. 1895. From the Doon to the Girvan Water, along the Carrick Shore. Transactions of the Geological Society of Glasgow, Vol. 10, p. 1 - 12. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S014
|
