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Definitions for: Petrology [n] the branch of geology that studies rocks: their origin and formation and composition
Webster (1913) Definition: Pe*trol"o*gy, n. [Petro + -logy.]
1. The department of science which is concerned with the
mineralogical and chemical composition of rocks, and with
their classification: lithology.
2. A treatise on petrology.
See Also: geomorphology, morphology
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