amphibolite facies

Amphibolite (IPA: , ) 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 primarily of hornblende amphibole is a hornblendite, which are usually crystal cumulates. Rocks with >90 mphibole which have a feldspar groundmass may be a lamprophyre.
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B: (Kimia) fasies amfibolit
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