GEL1 L11 Metamorphic Rocks

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20 Terms

1
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Metamorphism is defined as __________ changes to rocks in the Earth’s interior.
Solid-state changes to rocks under heat and pressure.
2
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The two types of pressure that influence metamorphism are __________ and __________ pressure.
confining and directed pressure.
3
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__________ pressure is applied equally in all directions and does not cause foliation.
Confining
4
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__________ pressure is unequal, higher in one direction, and causes foliation.
Directed
5
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Low grade metamorphism results in rocks like __________, while high grade metamorphism produces rocks like __________.
slate; gneiss.
6
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Foliated metamorphic rocks are classified based on the __________ of mineral grains.
alignment
7
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An example of a non-foliated metamorphic rock is __________.
Marble.
8
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The reorganization and recrystallization of minerals in a rock due to heat and pressure is part of the __________ process.
metamorphism.
9
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The original rock that undergoes metamorphism is called the __________ rock.
parent.
10
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The process where atoms slowly diffuse in solids during metamorphism is known as __________.
solid-state diffusion.
11
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Micas are an example of __________ grains that align with the lowest pressure during metamorphism.
platy.
12
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Foliated metamorphic rocks often display a texture called __________ cleavage.
slaty.
13
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The highest grade of metamorphic rock is __________, which is produced by substantial change.
Gneiss.
14
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Quartzite is classified as a __________ metamorphic rock due to its lack of foliation.
non-foliated.
15
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The metamorphic facies present at convergent boundaries typically experience __________ pressure and temperature.
high.
16
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Hydrothermal metamorphism occurs at __________ plate boundaries.
divergent.
17
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During shock metamorphism, __________ pressure and heat are produced from impacts.
shockwave.
18
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The classification of metamorphic rocks includes low grade (like slate) to high grade (like __________).
Gneiss.
19
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Non-foliated metamorphic rocks lack foliation primarily because they are composed of a __________ mineral.
mostly one.
20
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The two main factors that control or influence metamorphism are __________ and __________.
heat; pressure.

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