| Computer Code: |
TLG |
Preferred Map Code: |
TLG |
| Status Code: |
Full |
| Age range: |
Llandovery Epoch (SL)
— Llandovery Epoch (SL) |
| Lithological Description: |
Grey, brown and black mudstones, and thin beds of gritty sandstone. |
| Definition of Lower Boundary: |
Disconformable junction with Shalloch Formation (Ordovician). |
| Definition of Upper Boundary: |
Conformably overlain by Saugh Hill Grits Formation. |
| Thickness: |
60-180m |
| Geographical Limits: |
Girvan area, south-west Scotland. |
| Parent Unit: |
Newlands Subgroup (NEWL)
|
| Previous Name(s): |
Modestus Shales [Obsolete Name and Code: Use TLG]
(-1235)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Penwhapple Burn, SO08W. |
| Reference(s): |
| 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. |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S008
|
