| Computer Code: |
CLIF |
Preferred Map Code: |
CLIF |
| Status Code: |
Full |
| Age range: |
Ashgill Series (OA)
— Ashgill Series (OA) |
| Lithological Description: |
Grey unbedded silty mudstone with sparse brachiopod fauna (slump sheet). |
| Definition of Lower Boundary: |
Succeeds the grey-green well-bedded mudstones and siltstones and thinly bedded sandstones of the Farden Member, with the very fossiliferous Starfish Beds at its summit. |
| Definition of Upper Boundary: |
Succeeded by grey-green bedded mudstones and siltstones of the Waterfall Member. |
| Thickness: |
c.10m |
| Geographical Limits: |
Girvan area, southwest Scotland. |
| Parent Unit: |
South Threave Formation (STHV)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Lady Burn, Craighead Inlier, c.700m eastnortheast of South Threave Farm. Harper, 1982. |
| Reference(s): |
| Harper, D A T, 1984. Brachiopods from the Upper Ardmillan succession (Ordovician) of the Girvan district, Scotland. Part 1. Monograph of the Palaeontographical Society, London. 1-78 (Publication No.565, part of Vol.136 for 1982). |
| Floyd, J D and Ingham, J K (in prep). A Stratigraphical Lexicon of the Lower Palaeozoic rocks of the Girvan-Ballantrae district, southwest Scotland. |
| Harper, D A T, 1982. The stratigraphy of the Drummock Group (Ashgill), Girvan. Geological Journal, Vol.17, p.251-277.l. 17 251-277 |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
