Term
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Definition
the changes to rocks that take place in earth's interior.
form from preexisting rocks resulting from extreme heat and pressure, causes changes to texture and mineral composition of rock. |
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| metamorphic ____ form as minerals _____ or new minerals form under high pressure conditions. |
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Definition
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| minerals that are ____ at high temps and high pressure create new rocks that are ____ at high temps and high pressures. |
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Definition
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| Factors controlling metamorphic characteristics: |
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Definition
composition of parent rock
temperature
pressure
fluids
time |
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Term
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Definition
| pressure applied equally on all surfaces of a substance as a result of burial or submergence. |
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Term
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Definition
forces on a body are stronger or weaker in different directions
leads to planar fabrics known as foliation |
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Definition
| a type of differential stress where rock is compressed greater in one direction, usually due to tectonic forces. |
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Definition
| a type of differential stress where rock is sheared, commonly seen in fault zones where rocks are sliding past each other. |
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Definition
| strong confining pressure due to weight of overlying rocks. |
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| classifications of metamorphic rocks |
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Definition
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Term
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Definition
| rocks have a planar texture |
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Term
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Definition
marble (limestone)
quartzite (sandstone)
hornfels (shale/basalt) |
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Term
foliated rocks
(increasing in metamorphic grade as temps and P increase) |
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Definition
slate
phyllite
schist
gneiss
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Term
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Definition
metamorphism in which high temps is the dominant factor.
high temps without differential stress in small areas surrounding magma bodies, produce nonfoliated meta rocks. |
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Term
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Definition
meta that takes place at considerable depth underground.
large areas exposed to high temps and high differential stress associated with tectonic movement |
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Definition
| high pressure resulting from comets or asteroids impacting |
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Term
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Definition
| circulation of fluids near magma bodies or deep within the earth, produces hydrothermally altered rocks. |
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Term
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Definition
| higher meta grade means formed at higher temps and P |
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Term
| _______ is associated with convergent plate boundaries. |
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Definition
regional metamorphism.
depressed isotherms in subduction zones leads to high p low temp meta rocks. |
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Term
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Definition
| a mixed igneous and meta rock. |
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Term
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Definition
| a line connecting points of equal temperature. |
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Term
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Definition
| metamorphism coupled with the introduction of ions from an external source. |
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