ultramafic rock
41Megamullion — Megamullion, called also oceanic core complex (OCC), is an abyssal geologic structure showing ellipsoidal shield like positive morphologic relief. It is constituted mainly by serpentinized ultramafic rocks of abyssal mantle and secondary by… …
42Mining in Cameroon — Cameroon Overview= Cameroon has a total area of approximately 475 thousand square kilometers, a coastline of some 400 kilometers, and a population approaching 18 million people. [CIA World Factbook.] Mining History As of April 2008, Cameroon has… …
43ophiolite — noun an assemblage of mafic and ultramafic rock fragments of the ocean lithosphere that has been tectonically moved onto a continental margin or island …
44Nickel mining in New Caledonia — A creek in southern New Caledonia. Red colours reveal the richness of the ground in nickel and iron oxides Location …
45komatiite — n. ultramafic rock with a non amassed texture assumed to be extrusive …
46Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… …
47Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …
48Kambalda type komatiitic nickel ore deposits — Kambalda type nickel ore deposits are a class of magmatic nickel copper ore deposit in which the physical processes of komatiite volcanology serve to enrich, concentrate and deposit nickel bearing sulfide within the lava flow environment of an… …
49Lava — flow redirects here. For the programming anti pattern, see Lava flow (programming). For other uses, see Lava (disambiguation) …
50Ore genesis — The various theories of ore genesis explain how the various types of mineral deposits form within the Earth s crust. Ore genesis theories are very dependent on the mineral or commodity. Ore genesis theories generally involve three components:… …
