| 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
|
