Antrim Schist

Schist and Psammite of Dalradian age (1000-545 million years old) outcrops in several areas in County Antrim, particularly South East of Ballycastle where the Argyll Group outcrops, further South along the coast the Southern Highland Group also outcrops. These psammites/schists are occasionally seen on buildings in these areas and tend to have a greenish grey colour and distinct foliation