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Images of Metamorphic Rocks |
Metamorphic rocks form in the earth's interior as previously
existing rocks are altered by heat, pressure, chemically
active fluids. They are composed of wide variety of
minerals. Pressure during metamorphism may produce a
prominent lineation or layering in the rock called
foliation. At the simplest level, the metamorphic rocks are
classified on the basis of whether they are foliated or
nonfoliated. |
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