Give the diagnostic characters of Metamorphic Rocks.
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Characteristics of Metamorphic Rocks. Metamorphism involves the alteration of existing rocks by either excessive heat and pressure, or through the chemical action of fluids. This alteration can cause chemical changes or structural modification to the minerals making up the rock
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Characteristic:
1. Classified by texture and composition.
2. Rarely has fossils.
3. May react with acid.
4. May have alternate bands of light and dark minerals.
5. May be composed of only one mineral, ex. marble & quartzite.
6. May have layers of visible crystals.
7. Usually made of mineral crystals of different sizes.
8. Rarely has pores or openings.
9. May have bent or curved foliation.
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