LAB #6: METAMORPHIC ROCKS QUESTIONS AND CORRECT ANSWERS

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LAB #6: METAMORPHIC ROCKS
QUESTIONS AND CORRECT ANSWERS


Metamorphism - ans- ws wsws




The process in which rocks change under intense and heat pressure (without melting)
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Protolith - ans-The unmetamorphosed, original parent material of a Metamorphic Rock
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Recrystallization - ans- ws wsws




When small crystals of one mineral slowly convert to larger and fewer crystals of the same mineral
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- The most common change caused by metamorphism
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Neomorphism - ans- ws wsws




The mineral composition of rocks can also change during recrystallization and form different mineral
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s with the same chemical elements
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Three Main Processes that form Metamorphic Rocks - ans-1.) Changes in pressure
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2.) Changes in temperature
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3.) Contact with hot fluids
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Contact Metamorphism - ans- ws ws wsws




Rocks that are adjacent to a lava or magma body and experience intense heat and become changed
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- The closer the rock is to a heat source, the more heating and metamorphism it experiences
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- Physical Process cause: heating
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Hydrothermal Metamorphism - ans-Rocks that are created by reacting with hot fluids (like water)
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Dynamically Metamorphosed Rocks - ans-Rocks that are created by changes in pressure
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Cataclastites - ans- ws wsws




Powdery and broken rocks produced from rocks that are caught in fault systems near the surface of t
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Mylonites - ans-Stretched out (taffy- ws wsws ws ws




like) rocks produced from rocks that are caught in fault systems near the surface of the earth
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Regional (Dynamothermal) Metamorphism - ans- ws ws ws wsws




Process that occurs over a large area where rocks are deformed while they are recrystallizing
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The largest class of metamorphic rocks that are created by all three processes (changes in temperat
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ure, pressure, and fluid composition)
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