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This site explores igneous rocks in-depth through descriptions and pictures. The formation and distribution of this rock type are covered, as well as magma types associated with them (mafic to felsic). Classification of igneous rocks covers their texture and composition, including the difference between intrusive and extrusive. An alphabetical listing of rocks connects the user with a description, picture, tectonic association, and mineral composition of the rock. Bowens Reaction Series is covered as well, with associated rock types. A self-test allows the user to identify rocks by picture alone. Links are provided to sites with further information.
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