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
|