Meaning of basalt

ba•salt

Pronunciation: (bu-sôlt', bas'ôlt, bā'sôlt), [key]
— n.
  1. the dark, dense igneous rock of a lava flow or minor intrusion, composed essentially of labradorite and pyroxene and often displaying a columnar structure.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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