The BGS Lexicon of Named Rock Units — Result Details

Cushendun Formation

Computer Code: CCC Preferred Map Code: DUN
Status Code: Full
Age range: Early Devonian Epoch (DL) — Early Devonian Epoch (DL)
Lithological Description: Thin basal breccia of angular schist clasts overlain by conglomerate dominantly of rounded clasts of quartzite with minor vein quartz and volcanic rock.
Definition of Lower Boundary: Unconformable on Precambrian (Dalradian Supergroup).
Definition of Upper Boundary: Gradational with succeeding Ballyagan Formation by loss of conglomerates and increase in volcaniclastic detritus.
Thickness: 0-600m (0-1968ft)
Geographical Limits: Northeast County Antrim between Cushendun and Cushendall on the northeast flank of Cross Slieve.
Parent Unit: Cross Slieve Group (CSSL)
Previous Name(s): Cushendun Conglomerate (-4527)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Shoreface cliffs and outcrops on the south side of Cushendun Bay extending south from the Cushendun Caves. 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