Oblique aerial photograph of Foinaven (Ganu Mor), Sutherland

Quartzites on Arran are not as spectacular as elsewhere in Scotland, as is shown in the above image.

Oblique aerial view of Foinaven (Ganu Mor), one of a group of mountains including Arkle and Meall Horn, situated in the heart of the Reay Forest. It illustrates typical Cambrian quartzite topography and the Cambrian-Lewisian unconformity. Sutherland. View looking east.

The pale-coloured Cambrian quartzites form the crest of the ridge and rest unconformably on Lewisian gneiss. Note the very marked difference in topography, the Lewisian forms the typical 'rock ridge and boggy hollow' terrain. The deeply gullied face of Ben Hope can be seen in the background.

SCRAN ID: 000-000-147-947-C; British Geological Survey