pyroxene hornblendite

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• Superior craton — in the west. The western margin extends from northern Minnesota through eastern Manitoba to northwestern Ontario.The formation of the Superior craton is best explained within the context of 2.72 2.68 Ga accretion of small continental plates and… …   Wikipedia

• Amphibolite — (pronEng|æmˈfɪbəlaɪt) is the name given to a rock consisting mainly of hornblende amphibole, the use of the term being restricted, however, to metamorphic rocks. The modern terminology for a holocrystalline plutonic igneous rocks composed… …   Wikipedia

• amphibolite — amphibolitic /am fib euh lit ik/, adj. /am fib euh luyt /, n. Petrog. a metamorphic rock composed mainly of amphibole and plagioclase. [1825 35; AMPHIBOLE + ITE1] * * * Igneous or metamorphic rock composed largely or dominantly of amphibole… …   Universalium

• Geochemistry — 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… …   Wikipedia