Soay, Skye Elgol. The island is part of the Cuillin Hills National Scenic Area, one of 40 in Scotland. The name derives from Old Norse "Sauða-ey" meaning "Sheep Island". Camas nan Gall (G: "Bay of Foreigners") is probably named after the Norse invaders, after whom the Hebrides ("Na h-Innse Gall") are also named. The population peaked at 158 in 1851, following eviction of crofters from Skye in the Highland Clearances. In 1946, author Gavin Maxwell bought the island and established a factory to process shark oil from basking sharks. The enterprise was unsuccessful, lasting just three years. Maxwell wrote about it in
Geology of Skye Part of the magma chambers for the volcanoes are exposed at the surface as major intrusions of gabbro and granite. These coarse-grained igneous rocks are relatively resistant to erosion and now form the Cuillin hills. The Black Cuillin are formed of gabbro, which erodes to form the characteristically jagged outlines, although this is in large part due to the many minor intrusions, such as dykes and cone sheets that cut the gabbro. The Red Hills are formed of granite and have a more rounded topography. All pre-Quaternary rock types on the island are affected by a major swarm of dykes,