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Dictionary

ba•salt

Pronunciation: (bu-sôlt', bas'ôlt, bā'sôlt), [key]
—n.
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.

basal ridge

basaltware

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