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May 27, 2012
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Dictionary


pe•trog•ra•phy



Pronunciation: (pi-trog'ru-fē), [key]
—n.
the branch of petrology dealing with the description and classification of rocks, esp. by microscopic examination.

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

petrographpetrol
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