Term
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Definition
Take an existing rocks and subject it to additional heat and pressure and you change it to a metamorphic rock
During additional heat and pressure you get very fine grains and a layered appearance to them. |
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Term
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Definition
Pressure is applied to the protolith, which causes it to shear or bend, but not break.
Temperatures must be high enough that brittle fractures do not occur, but not so high that diffusion of crystals takes place |
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Term
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Definition
| Forces are applied equally in all directions |
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Term
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Definition
Forces are unequal in different directions
Convergent Plate Boundaries |
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Term
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Definition
| Lines in the rock due to high pressure |
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Term
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Definition
Rock or Slaty Cleavage
Schistosity
Gneissic Texture |
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Term
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Definition
| Rocks split into thin slabs when hit with a hammer |
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Term
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Definition
| Foliation characteristic of coarser grained metamorphic rocks |
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Term
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Definition
| Dark and light silicate minerals are separated giving he rock a banded appearance |
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Term
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Definition
| Metamorphic rocks that do not exhibit foliation |
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Term
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Definition
Contact or Thermal
Hydrothermal
Regional
Burial and Subduction Zone |
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Term
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Definition
| Used to determine the degree of metamorphism a rock has experienced |
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Term
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Definition
| A mineral that is identical to another mineral in chemical composition but differs from it in crystal structure |
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