Term
| Where do metamorphic rocks come from? |
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Definition
| Pre-existing rocks! They're transformed. |
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Term
| What types of things alter rocks into becoming metamorphic rocks? (agents of metamorphism) |
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Definition
| Heat, Pressure, Chemically active fluids |
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Term
| What 2 types of changes take place inside metamorphic rocks? |
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Definition
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Term
| What determines the extent to which agents will metamorphosize rocks? |
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Definition
| The mineral makeup of the rock. |
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Term
| What is the fluid that helps out in metamorphisism? |
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Definition
| Water, with dissolved ions. This enhances the process, by dissolving minerals and helping migration and precipitation of minerals. |
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Term
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Definition
| When the minerals form into sheets, makes the rocks platy |
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Term
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Definition
| marble (metamorphosized limestone) |
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Term
Common Metamorphic rocks:
Foliated |
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Definition
| Shale, Phyllite, Schists, Gneiss. |
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Term
Common Metamorphic rocks:
Non-foliated |
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Definition
| Marble (from limestone), Quartzite (from quartz) |
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Term
| Contact or Thermal metamorphism |
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Definition
| Alteration from contact with igneous rocks and magma |
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Term
| Hydrothermal Metamorphism |
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Definition
| hot, ion-rich fluids circulate through rock and cause chemical alteration of minerals. Occurs mostly on the oceanic ridge system. Salt water gets in and changes the mineral makeup. |
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Term
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Definition
| Large areas at deep depths are all converted to metamorphic rocks . Has to do with Mountain building. |
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