and geochemistry
51Mantle plume — A superplume generated by cooling processes in the mantle.[1] A mantle plume is a hypothetical thermal diapir of abnormally hot rock that nucleates at the core mantle boundary and rises through the Earth s mantle. Such plumes were invoked in 1971 …
52Contributors — ▪ 2000 Adams, Andy. Editor and Publisher, Sumo World. Author of Sumo; Sumo World Record Book. • sports and games: Judo; Wrestling: Sumo Ahn, Ki suk. Assistant Editor, Shindonga of Donga Ilbo. • biographies (in part) Alder,… …
53Richard L. Hay — Richard LeRoy Hay (April 29 1929 ndash; February 10 2006) was an American geologist whose most famous work was as the principal geologist working with Mary Leakey at Olduvai Gorge, the site of many important hominid finds in the study of human… …
54Moon — This article is about Earth s Moon. For moons in general, see Natural satellite. For other uses, see Moon (disambiguation) …
55Ordovician — Period 488.3–443.7 million years ago …
57Kimberlite — is a type of potassic volcanic rock best known for sometimes containing diamonds. It is named after the town of Kimberley in South Africa, where the discovery of an 83.5 carat diamond in 1871 spawned a diamond rush, eventually creating the Big… …
58Pilbara craton — The Pilbara craton (the Pilbara province in northwest Western Australia), along with the Kaapvaal craton (the Kaapvaal province of South Africa) are the only remaining areas of pristine Archaean 3.6 2.7 Ga crust on Earth. Similarities of their… …
59Christopher I. Chalokwu — Christopher Iloba Chalokwu (born December 30, 1952) is a United States citizen born in Nigeria. An academic with entrepreneurial vision, Professor Chalokwu has an abiding interest in education reform and the educational achievement of under… …
60Thomas Edvard Krogh — Thomas Edvard Tom Krogh, FRSC (1936 ndash; April 29, 2008) was a geochronologist and a former curator for the Royal Ontario Museum. He revolutionized the technique of radiometric uranium lead dating with the development of new laboratory… …
