Amphibolite
a metamorphic rock composed mainly of and plagioclase.
historical examples
the specimen was taken from a pegmat-te dike at its contact with an amphibolite.
the long labrador trail dillon wallace
the term is to some extent synonymous with “amphibolite” and “hornblende-schist.”
encyclopaedia britannica, 11th edition, volume 9, slice 6 various
noun
a metamorphic rock consisting mainly of amphibole and plagioclase
amphibolite
(ām-fĭb’ə-līt’)
a metamorphic rock composed chiefly of amphibole and plagioclase and having little or no quartz.
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