View of Pladda Island, south-east coast of Arran, opposite Kildonan, Buteshire


Pladda Island, south-east coast of Arran, opposite Kildonan. Buteshire. A Tertiary columnar quartz-dolerite sill is intrusive into the Triassic sandstone. The photograph also gives a good view of the lighthouse.

The island, 800 metres long and 21 metres high is composed almost entirely of sill. The cliff represents an old cliff line formed by marine erosion, below which is a raised beach of the Main Postglacial Shoreline times, a time when the sea level was higher.

SCRAN ID: 000-000-146-231-C; British Geological Survey