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…showed last 75 words of 1829 total…are formed. Changes in temperature and pressure can allow igneous and sedimentary rocks to change physically or chemically to form metamorphic rocks. At higher temperatures, metamorphic rocks may be partially melted, and crystallization of this melt will create igneous rocks. Uplift and erosion can expose all rocks types at the surface, re-initializing the cycle (www.science.ubc.ca). This Diagram was drawn by Fallan Davis from www.cnwl.igs.net Bibliography None (Sources are sited)