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Definition of: dolerite
(dol′ə·rīt) noun
1. A coarse, crystalline basalt, containing labradorite and augite: sometimes used interchangeably with diabase.
2. U.S. Any dark, greenish igneous rock not readily identified by visual examination. [<Gk. doleros deceptive <dolos deceit + -ITE1; so called because not easily identified]
—dol′er·it′ic (-rit′ik) adjective
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