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trachybasalt

[ trey-kee-buh-sawlt, -bas-awlt, -bey-sawlt, trak-ee- ]

noun

  1. a fine-grained volcanic rock containing sanidine and calcic plagioclase.


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Word History and Origins

Origin of trachybasalt1

First recorded in 1885–90; trachy- + basalt

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trachy-trachycarpous