| Computer Code: |
CDAL |
Preferred Map Code: |
DALL |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Conglomerate, grey to greyish purple, dominantly of weathered rhyolite and basalt clasts, sandstone, volcaniclastic, very coarse-grained and pebbly to medium-grained, thin reddish brown mudstones. |
| Definition of Lower Boundary: |
Abrupt transition from preceeding Ballyagan Formation by appearance of conglomerates and increase in volcaniclastic detritus. |
| Definition of Upper Boundary: |
Probable faulted contact with Cushendall Porphyry although it has been suggested there is evidence of a flow-foot breccia and that the porphyry is thus extrusive. |
| Thickness: |
0-200m (0-656ft). |
| Geographical Limits: |
Northeast County Antrim between Cushendun and Cushendall on the southeast flank of Cross Slieve. |
| Parent Unit: |
Cross Slieve Group (CSSL)
|
| Previous Name(s): |
none recorded or not applicable
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Reference Section |
Shoreface cliffs and outcrops on the southeast side of Cross Slieve extending south from Port Obe to Salmon Rock at the north side of Cushendall Bay. Irish Grid |
| Reference(s): |
| Simon, J B. 1984. Provenance and depositional history of the Lower Old Red Sandstone of northeast Antrim. Irish Journal of Earth Sciences 6, 213-228. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
N14
|
