Metamorphic_lecture - Instruction: View full-screen images...

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Instruction: View full-screen images in the Slide Show mode of display. Read the explanatory notes in the Normal View mode of display.
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The Rock Cycle
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METAMORPHIC ROCKS What is metamorphism? Ingredients of metamorphism Styles of metamorphism Common metamorphic rocks
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METAMORPHISM: Greek: “to transform” no melting!
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METAMORPHISM: Greek: “to transform” • closed chemical system (except volatiles such as H 2 O) • no melting! • changes of texture, mineral composition, or both
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andalusite kyanite sillimanite polymorphs Closed chemical system Al 2 SiO 5 (D. Tasa, AGI)
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Polymorphs of Al 2 SiO 5 Temperature (T) Pressure (P) Each polymorph is stable in a restricted range of T and P. andalusite kyanite sillimanite
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METAMORPHIC ROCKS What is metamorphism? Ingredients of metamorphism Styles of metamorphism Common metamorphic rocks
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INGREDIENTS OF METAMORPHISM elevated temperature (T) elevated pressure (P)
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(M. Helper) Note: 1 kilobar ~ 1000 atmospheres diagenesis melting metamorphism m e t a o r p h i s
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INGREDIENTS OF METAMORPHISM elevated temperature (T) elevated pressure (P) shear stress tiny amount of H 2 O
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What is metamorphism? Ingredients of metamorphism
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Metamorphic_lecture - Instruction: View full-screen images...

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