| Computer Code: |
STGC |
Preferred Map Code: |
STGC |
| Status Code: |
Full |
| Age range: |
Telychian Age (ST)
— Telychian Age (ST) |
| Lithological Description: |
The lower part is composed of green, thinly-bedded, grits and siltstones, whereas the upper part is composed of red, massive, coarse grits and conglomerates. |
| Definition of Lower Boundary: |
Conformable on the Knockgardner Sandstone Formation. |
| Definition of Upper Boundary: |
Unconformably overlain by the Inverclyde Group. |
| Thickness: |
About 90 m thick. |
| Geographical Limits: |
The Girvan to Straiton area of south-west Scotland. |
| Parent Unit: |
Straiton Subgroup (STNG)
|
| Previous Name(s): |
Straiton Grits and Conglomerates [Obsolete Name and Code: Use STGC]
(-2456)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Two quarries north of the road from Kirkbride to Knockgardner, Straiton. Cocks and Toghill, 1973. |
| Reference(s): |
| Ingham, J K. 1992. Excursion 30: Girvan Foreshore. 396-416 in Lawson, J D and Weedon, D S (editors), Geological Excursions around Glasgow and Girvan. Geological Society of Glasgow. |
| 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. |
| 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. |
| 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: |
| none recorded or not applicable |
