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Rocks and Minerals

How do metamorphic differ from sedimentary and igneous?


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February 06, 2011 4:43PM

Metamorphic rock is igneous, sedimentary, or other metamorphic rock that has undergone a change due to heat and/or pressure. The change could be an alteration in mineralogy, a physical restructuring of existing minerals, or a recrystallization of existing minerals--giving the metamorphic rock a new set of characteristics which indicate that change.