Cuillin Cuillin The Cuillin ( or ') is a range of rocky mountains located on the Isle of Skye in Scotland. The main Cuillin ridge is also known as the Black Cuillin to distinguish it from the Red Cuillin (', known locally as Red Hills), which lie to the east of Glen Sligachan. The peaks of the Black Cuillin are mainly composed of gabbro, a very rough igneous rock which provides a superb grip for mountaineers; and basalt, which can be very slippery when wet. The rocks forming the ridge of the Black Cuillin (and outliers such Bla Bheinn) are dark
Skye at Waterstein Head. Oolitic loam provides good arable land in the main valley. Lochs Bracadale and Harport and the island of Wiay lie between Duirinish and Minginish, which includes the narrower defiles of Talisker and Glen Brittle and whose beaches are formed from black basaltic sands. Strathaird is a relatively small peninsula close to the Cuillin hills with only a few crofting communities, the island of Soay lies offshore. The bedrock of Sleat in the south is Torridonian sandstone, which produces poor soils and boggy ground, although its lower elevations and relatively sheltered eastern shores enable a lush growth of