| Computer Code: |
CRFD |
Preferred Map Code: |
CRFD |
| Status Code: |
Full |
| Age range: |
Arenig Series (OR)
— Caradoc Series (O4) |
| Lithological Description: |
Lava, chert, tuff and mudstone succession. |
| Definition of Lower Boundary: |
Faulted. |
| Definition of Upper Boundary: |
Thought to be overlain by Glenkiln Shale Formation of the Moffat Shale Group. |
| Thickness: |
To about 190m |
| Geographical Limits: |
The Southern Uplands of Scotland, and Longford Down in Northern Ireland. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Glencaple Burn, Crawford, Lanarkshire. |
| Reference(s): |
| Floyd, J D. 1996. Lithostratigraphy of the Ordovician rocks in the Southern Uplands: Crawford Group, Moffat Shale Group, Leadhills Supergroup. Transactions of the Royal Society of Edinburgh: Earth Sciences, Vol. 86, 153-165. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
S015
S015
S008
S016
S025
S017
S024
|
