| Computer Code: |
PSO |
Preferred Map Code: |
PSo |
| Status Code: |
Index Level |
| Age range: |
Rhuddanian Age (SR)
— Aeronian Age (SA) |
| Lithological Description: |
[Obsolete: use NEWL] Mudstone and sandstone: see constituent formations (Tralorg, Saugh Hill Grits, Pencleuch Shale). |
| Definition of Lower Boundary: |
Disconformable junction with Shalloch Formation (Ordovician). |
| Definition of Upper Boundary: |
Disconformable junction with Lower Camregan Grits Formation (Penwhapple North Group). |
| Thickness: |
c.240-700m |
| Geographical Limits: |
Girvan area, south-west Scotland. |
| 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 |
See constituent formations. |
| Reference(s): |
| 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. |
| Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. |
| Cocks, L R M, and Toghill, P. 1973. The biostratigraphy of the Silurian rocks of the Girvan District, Scotland. Journal of the Geological Society of London, Vol. 129, 209-243. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S007
|
