10F_l_MetRx - MetamorphicRocks...

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Metamorphic Rocks Metamorphism  -  when rocks change form     Why?  Where?   What  changes
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Metamorphism  occurs when rocks are subjected to conditions unlike those in  which they formed: Temperature Pressure (depth) Since temperature increases downward in the Earth – where are the limits? Lower limit is gradational  - noticeable changes T >   ~300° - 350°C Upper limit - when rocks melt
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Migmatite partially melted igneous metamorphic
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(1) In close proximity to magma bodies -  Contact metamorphism - magma heats up adjacent rocks - affects only adjacent rock Where does metamorphism occur?
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Where does metamorphism occur? (2) During mountain building -  Regional metamorphism - rocks are buried and heated at convergent plate boundaries - 10s to 100s of kms of rock affected
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(1) Mineralogical changes during metamorphism - new assemblage of minerals form in response to different T and P
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This note was uploaded on 02/19/2011 for the course GLY 1000 taught by Professor Vogl during the Spring '08 term at University of Florida.

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10F_l_MetRx - MetamorphicRocks...

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