basalt definition

  • noun:
    • a tough, heavy, dark volcanic rock composed mainly of plagioclase, pyroxene, and olivine, and sometimes having a glassy appearance.
    • A kind of difficult unglazed pottery.
    • A hard mafic igneous stone of varied mineral content; volcanic in beginning, it generates up most of the Earth's oceanic crust.
    • a kind of unglazed pottery.
    • A rock of igneous origin, comprising augite and triclinic feldspar, with grains of magnetized or titanic metal, as well as bottle-green particles of olivine often disseminated.
    • An imitation, in pottery, of normal basalt; some sort of black colored porcelain.
    • A volcanic rock occurring widely, and composed of a triclinic feldspar, along with augite and magnetite or titaniferous metal.
    • Proposed as a field term, in petrography, for several dark-colored aphanitie, nonporphyritic (aphyric), igneous stones.
    • the most typical type of solidified lava; a dense dark grey fine-grained igneous stone that's composed mainly of plagioclase feldspar and pyroxene

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