| Computer Code: |
CRGN |
Preferred Map Code: |
notEntered |
| Status Code: |
Index Level |
| Age range: |
Aeronian Age (SA)
— Aeronian Age (SA) |
| Lithological Description: |
[Obsolete: use DLY] Fossiliferous grits and flags, limestones, calcareous shales and mudstones. |
| Definition of Lower Boundary: |
Drawn at the base of the Rhynchonella Grits of the Camregan Group where they conformably rest upon the Monograptus Sedgwickii Shales. |
| Definition of Upper Boundary: |
Drawn at the conformable upward passage of grit of the Camregan Grits Formation to purple shale and mudstones of the Penhill Group. |
| Thickness: |
60 metres. |
| Geographical Limits: |
The area around Girvan, Ayrshire. |
| Parent Unit: |
none recorded or not applicable
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Penwhapple Glen, below Camregan Hill, and about 5kms east of Girvan, Ayrshire. |
| Reference(s): |
| Floyd, J D and Williams, M. 2003. A revised correlation of Silurian rocks in the Girvan district, SW Scotland. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol. 93 (for 2002), 383-92. |
| Pringle, J. 1935. British Regional Geology: the south of Scotland [1st edition]. [Edinburgh: HMSO.] |
| Jones, O T, 1921. The Valentian Series. Quarterly Journal of the Geological Society, Vol.77, p.154-157. |
| Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. |
| Jones, O T. 1929 In: Evans, J W, and Stubblefield, C J. Handbook of the Geology of Great Britain, p. 101, London. |
| Cameron, I B, Stone, P and Smellie, J, 1986. Geology of the Country around Girvan. Explanation of 1:50 000 sheet. British Geological Survey, Sheet 7, Scotland. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
