| Computer Code: |
CRDY |
Preferred Map Code: |
CRDY |
| Status Code: |
Full |
| Age range: |
Pridoli Epoch (SO)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Grey to brown, fine-grained to pebbly sandstones fining up into siltstones and mudstones with locally developed calcrete nodules, with localised thin beds of mudstone breccia and pebbly mudstone. |
| Definition of Lower Boundary: |
The top of the conglomerates belonging to the Isle Port Conglomerate Member. |
| Definition of Upper Boundary: |
The base of the volcanics forming of the Carrick Volcanic Formation. |
| Thickness: |
About 70 m thick. |
| Geographical Limits: |
Ayrshire, Scotland. |
| Parent Unit: |
Swanshaw Sandstone Formation (SWAS)
|
| Previous Name(s): |
(Part of the) Lower Old Red Sandstone [Obsolete Name and Code: Use CRDY]
(-1457)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Coastal section south of Ayr, between Fairy's Well and Katie Grey's Rocks (Jones, 2001; Smith, 2000). |
| Reference(s): |
| 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. |
| Jones, N S. 2001. Sedimentology of the Swanshaw Sandstone Formation in Ayrshire. British Geological Survey Internal Report IR/01/164. |
| 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). |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S014
|
