| Computer Code: |
GWSH |
Preferred Map Code: |
GWSH |
| Status Code: |
Full |
| Age range: |
Rhuddanian Age (SR)
— Rhuddanian Age (SR) |
| Lithological Description: |
Hard, light and dark grey, laminated mudstones and siltstones with a graptolite fauna. |
| Definition of Lower Boundary: |
Conformably overlies the Mulloch Hill Sandstone Formation (MLHS). |
| Definition of Upper Boundary: |
Conformably overlain by the Glenwells Conglomerate Formation (GWC). |
| Thickness: |
About 97 m thick. |
| Geographical Limits: |
Craighead Inlier, Girvan. |
| Parent Unit: |
Newlands Subgroup (NEWL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Glenwells Burn, Craighead Inlier, Girvan. Cocks & Toghill, 1973. |
| 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. |
| 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. |
| Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. |
| Freshney, E C. 1959. An extension of the Silurian succession in the Craighead Inlier, Girvan. Transactions of the Geological Society of Glasghow, Vol. 24, 27-31. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S014
|
