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January 15, 2011

Geology Word of the Week: K is for Komatiite

Komati River, South Africa. Image from Wikipedia here. def. Komatiite:1. An ultramafic, volcanic rock that is primarily composed of the minerals pyroxene and olivine.2. A very unusual and rare volcanic rock type that is not produced today. Most komatiite lavas were produced in the Archean (approximately 2.5 to 3.8 billion years ago).3. A rock type whose hotly– and wetly– debated origin sometimes galvanizes geologists to shouting matches, fist fights, and …


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