to the south. Taking their names from the story of Lot in the Book of Genesis, "Lot" and "Lot's Wife" are two solitary pillars of rock topping two valleys near Sandy Bay. The pillars are phonolitic intrusions, which are more resistant to erosion than surrounding volcanic features which have, in time, eroded away. Natural resources Saint Helena possesses fish as a main natural resource. Land use in the island group is divided between arable land (with 12.9% of the area given to this) and other uses, which occupy the remaining 87.1%. In terms of maritime claims, St Helena has an exclusive fishing zone of 200 nautical miles, and a territorial sea of twelve nautical miles. Islands Just off the coast of St Helena island itself are numerous small islands. Starting from the north and running clockwise, these are: Shore Island, George Island, Rough Rock Island, Flat Rock, The Buoys, Sandy Bay Island, Black Horse Island, White Bird Island, Frightus Island, Jar Rock, Castle Point Rock, Robert Rock, Salt Rock, Speery Island, Flat Rock, The Needle, Lower and Upper Black Rock, Bird Island, Black Rock, Thompson's Valley Island, Peaked Island, Egg Island, Lady's Chair, Lighter Rock, Long Ledge, and Red Rock. Ecology Saint Helena harbours at least 40 species of plants unknown anywhere else in the world, and Ascension is a breeding ground for sea turtles and sooty terns. Districts The island of St Helena is divided into 8 districts, which are used for electoral and administrative purposes. See also List of mountains and hills of Saint Helena, Ascension and Tristan da Cunha List of towns in Saint Helena, Ascension and Tristan da Cunha Geography of Tristan da Cunha References External links Saint Helena Geography of Saint Helena, Ascension and Tristan da Cunha