Low grade metasedimentary rocks, Silurian in age, dating from the closing of Iapetus. Part of the Longford-Down Inlier in Ireland, the NE-SW strike is typical of these rocks.
The rocks in this model correspond to those in Location 2 on the larger model by MCG 3D here: https://sketchfab.com/3d-models/mourne-geology-coastal-processes-glasdrumman-83bb5841311f4111bb200500fd4a62b2 The actual area modelled is closer to Location 5 in the larger model.