Computer Code: |
BQS |
Preferred Map Code: |
BQS |
Status Code: |
Full |
Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
Lithological Description: |
Quartz and schist breccia, with beds of sandstone, red and grey shale, and subsidiary quartz conglomerate. |
Definition of Lower Boundary: |
Unconformable on rocks of the Dalradian Supergroup. |
Definition of Upper Boundary: |
The base of the Auchencar Sandstone Formation. |
Thickness: |
240 m thick. |
Geographical Limits: |
Isle of Arran. |
Parent Unit: |
Arbuthnott-Garvock Group (ATGK)
|
Previous Name(s): |
none recorded or not applicable
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
Allt Mhic Gilleregish |
Reference(s): |
Friend, P F, Harland, W B and Hudson, J D, 1963. The Old Red Sandstone and the Highland Boundary in Arran, Scotland. Transactions of the Edinburgh Geological Society, Vol.19, 363-425. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S338
|