amphibolite

noun

Etymology: Etymology tree English amphibole Proto-Indo-European *-tósder. Ancient Greek -της (-tēs)der. Ancient Greek -ῑ́της (-ī́tēs)der. Latin -ītēsbor. French -iteder. English -ite English amphibolite From amphibole + -ite.

1. Any of a class of metamorphic rocks composed mainly of amphibole with some quartz etc.

   “At that time, the Gondwana supercontinent was located at the southern part of the Southern Hemisphere, developed amphibolite metamorphism and formed the united crystalline basement at about 510 Ma.”