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Amphibolite felsic The name amphibolite has been used in geological literature for nearly 200 years, since Brongniart 1813. Amphibolite is a gneissose or granofelsic metamorphic rock mainly consisting of green, brown or black amphibole and plagioclase including albite, which combined form 75 of the rock and both of which are present as major constituents the amphibole constitutes ...