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Granite is Igneous rock. It crystallizes from hot melt (magma). Metamorphic rocks can be found associated with granite as result of their contact with country (surrounding) rocks. This will be a contact metamorphism. Metamorphism of granite it self results into granitic gneisses which are coarse foliated rocks.
Students of granites classify them in three or four categories. I-type (igneous) granites appear to arise from the melting of preexisting igneous rocks, S-type (sedimentary) granites from melted sedimentary rocks (or their metamorphic equivalents in both cases).y Andrew Alden. Granite is the signature rock of the continents. More than that, granite is the signature rock of the planet Earth itself. The other rocky planetsâ Mercury, Venus and Marsâare covered with basalt, as is the ocean floor on Earth.