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Metamorphic Rock 4.3

Vocabulary

TermDefinition
metamorphism when pertaining to a rock, it is when a rocks changes its form.
solid-state alteration process where a rock changes its mineral composition and texture without melting
foliated rock rock that was created with force from opposite directions creating an appearance of minerals with flat layers, or bands, of crystals.
nonfoliated rock rocks that are created with pressure and composed of blocky crystal shapes
porphyroblasts Crystals in new metamorphic minerals that grow large while the surrounding minerals remain small.
low-grade metamorphism associated with low temperatures and low pressure
high-grade metamorphism associate with high temperatures and high pressure
intermediate-grade metamorphism between low and high grade metamorphism
regional metamorphism A process where temperature and pressure affect large regions of Earth's crust resulting in rocks type change, foliation, and the folding and deformation of rock layers in that area.
contact metamorphism A process when molten material, such as that in an igneous intrusion, comes in contact with solid rock and changes it to metamorphic rock.
hydrothermal metamorphism A process that occurs when hot water reacts with rock and alters its chemical and mineral composition creating metamorphic rock
metamorphic metallic mineral resources resources that occurs mostly in the form of metal ores throughout metamorphic rock. examples are the iron ores magnetite and hematite
metamorphic non-metallic resources resources that occur in metamorphic rocks but are not ore. examples are talc, asbestos, and graphite
Created by: Lorrie.Jerome
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