sign up (free!)
Also on these boards
Beinn Alligin, Scotland Beinn Eighe is unusual amongst the Torridon mountains in that its summit is not composed of Precambrian Torridonian Sandstone, but Cambrian basal quartzite, a very hard but brittle rock. This gives it its familiar light coloured summits, a notable contrast to the other peaks in the area. Underlying the quartzite is a bed of Torridonian Sandstone.