Scottish Highlands in the Torridon Hills such as Liathach and Beinn Eighe in Wester Ross. These foundations are interspersed with many igneous intrusions of a more recent age, the remnants of which have formed mountain massifs such as the Cairngorms and the Cuillin of Skye. A significant exception to the above are the fossil-bearing beds of Old Red Sandstone found principally along the Moray Firth coast and partially down the Highland Boundary Fault. The Jurassic beds found in isolated locations on Skye and Applecross reflect the complex underlying geology. They are the original source of much North Sea oil. The Great Glen
Cuillin one of 40 such areas in Scotland. A Scottish Natural Heritage (SNH) review of the special qualities of the national scenic area stated: There are a number of theories about the derivation of the name "Cuillin". It is often suggested that it comes from the Old Norse word "kjölen" meaning ridges. This derivation gave rise to debate as to whether the hills should be referred to collectively as the Cuillin, rather than Cuillins. "Kjöllen" may also refer to the keel of a boat, suggesting a similarity with an upturned Viking longship. Gaelic derivations of the name suggest a link to