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Introduction to Theoretical Igneous Petrology
Petrology is the science concerned with the composition, origin, and natural history of rocks. Igneous petrology is a narrower field in which consideration is given to facts an theories resulting from study of rocks that were once partly or completely molten. Volcanology is a special field of igneous petrology in ehick emphasis is placed on phenomena associated with extrusive igneous rocks, especially those in volcanic regions. Petrogeny places emphasis on the manner of origin or genesis of rocks.
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