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dol•er•ite



Pronunciation: (dol'u-rīt"), [key]
n. Petrol.
1. a coarse-grained variety of basalt.
2. any of various other igneous rocks, as diabase.
3. any basaltlike igneous rock whose composition can be determined only by microscopic examination.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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