ultrabasic rock
21Peridotite — A peridotite is a dense, coarse grained igneous rock, consisting mostly of the minerals olivine and pyroxene. Peridotite is ultramafic and ultrabasic, as the rock contains less than 45% silica. It is high in magnesium, reflecting the high… …
22Geochemistry — The field of geochemistry involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks and soils, and the cycles of matter and energy that transport the Earth s… …
23New Caledonia — /kal i doh nee euh, dohn yeuh/ 1. an island in the S Pacific, ab. 800 mi. (1290 km) E of Australia. 113,680; 6224 sq. mi. (16,120 sq. km). 2. an overseas territory of France comprising this island and other smaller islands: formerly a penal… …
24Geology of Scotland — The geology of Scotland is unusually varied for a country of its size, with a large number of differing geological features. [Keay Keay (1994) op cit page 415.] There are three main geographical sub divisions: the Highlands and Islands is a… …
25Western Africa — ▪ region, Africa Introduction region lying south of the Sahara and east and north of the Atlantic Ocean. It is latitudinally divided into two parallel belts of land: the western portion of the Sudan, a geographic area that stretches across… …
26Baltic Shield — The Baltic Shield (sometimes referred to as the Fennoscandian Shield) is located in Fennoscandia (Norway, Sweden and Finland), northwest Russia and under the Baltic Sea. The Baltic Shield is defined as the exposed Precambrian northwest segment of …
27Mindanao — Coordinates: 8°00′N 125°00′E / 8°N 125°E / 8; 125 …
28Goldschmidt classification — The Goldschmidt classification, developed by Victor Goldschmidt, is a geochemical classification which groups the chemical elements according to their preferred host phases into lithophile (rock loving), siderophile (iron loving), chalcophile… …
29Rùm — Infobox Scottish island GridReference=NM371982 celtic name=Rùm norse name=possibly rõm øy meaning of name=Gaelic isle of the ridge (i dhruim), Norse wide island but may be pre Celtic area=10,463 ha area rank=15 highest elevation=Askival 812 m… …
30Northern Isles — This article is about the large group of Scottish islands including Orkney and Shetland. For the northern islands of Shetland, see North Isles. The Northern Isles of Scotland. The Northern Isles (Old Norse: Norðreyjar; Scots Gaelic: Na h Eileanan …
