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n. A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.

n. A kind of hard unglazed pottery.

n. A hard mafic igneous rock of varied mineral content; volcanic in origin, it makes up much of the Earth's oceanic crust.

n. A type of unglazed pottery.

n. A rock of igneous origin, consisting of augite and triclinic feldspar, with grains of magnetic or titanic iron, and also bottle-green particles of olivine frequently disseminated.

n. An imitation, in pottery, of natural basalt; a kind of black porcelain.

n. A volcanic rock occurring widely, and consisting of a triclinic feldspar, together with augite and magnetite or titaniferous iron.

n. Proposed as a field term, in petrography, for all dark-colored aphanitie, nonporphyritic (aphyric), igneous rocks.

n. the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene

"Natural rock pools in basalt rock, 5 km. west of Mecatan."

volcanic rock   

deccan basalt    analcite-basalt    melilite-basalt    basalt ware    ellipsoidal    pillow basalt   

Perrault    Renault    Walt    assault    default    exalt    fault    galt    gault    halt   

porphyry    sandstone    lava    obsidian    gneiss    alabaster    quartz    shale    onyx    freestone