| Computer Code: |
TMS |
Preferred Map Code: |
TMS |
| Status Code: |
Full |
| Age range: |
Caradoc Series (O4)
— Caradoc Series (O4) |
| Lithological Description: |
Coarse, buff-weathering, medium-grey pebbly grit with scattered boulders of dolerite, spilite lava and red granite. Some intercalated mudstones and siltstones yielding a brachiopod fauna. |
| Definition of Lower Boundary: |
Discrete lenticular pebbly and conglomeratic member within the flaggy sandstones, siltstones and mudstones of the Ardwell Farm Formation and located about 150m above the base of the formation. |
| Definition of Upper Boundary: |
Discrete lenticular pebbly and conglomeratic member within the flaggy sandstones, siltstones and mudstones of the Ardwell Farm Formation and located about 150m above the base of the formation. |
| Thickness: |
0 to 73m |
| Geographical Limits: |
Girvan area, southwest Scotland. |
| Parent Unit: |
Ardwell Farm Formation (ARD)
|
| Previous Name(s): |
Tornmitchel Conglomerate [Obsolete Name and Code: Use TMS]
(-1236)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
Girvan area. Williams, 1962. |
| Reference(s): |
| Williams, A, 1962. The Barr and Lower Ardmillan Series (Caradoc) of the Girvan district, southwest Ayrshire, with descriptions of the Brachiopoda. Memoir of the Geological Society of London, No.3. |
| Lapworth, C, 1882. The Girvan Succession. Quarterly Journal of the Geological Society of London, Vol. 38, 537-666. |
| Fortey, R A, Harper, D A T, Ingham, J K, Owen, A W, Parkes, M A, Rushton, A W A and Woodcock, N H. 2000. A revised correlation of Ordovician rocks in the British Isles. Geological Society Special Report, No.24. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
