peridotite definition

  • noun:
    • some of a group of igneous rocks composed mainly of olivine and different pyroxenes and achieving a granitelike surface.
    • A rock comprising tiny crystals of olivine, pyroxene and hornblende; the major constituent associated with Earth's mantle.
    • An eruptive rock described as the existence of chrysolite (peridot). In addition generally includes pyroxene, enstatite, chromite, etc. It's changed to serpentine.
    • A rock composed really of olivin, with which are usually linked almost of 1 or maybe more for the nutrients enstatite, diallage, augite, magnetite, chromite, and picotite.
    • a dark coarse-grained igneous rock consisting principally of olivine

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