Metamorphism Flashcards
burial metamorphism
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contact metamorphism
Changes in the mineralogy and texture of rock resulting from the heat and pressure in a small area, such as rocks near and in contact with an igneous intrusion.
exhumation
A process in which subducted metamorphic rocks rise the surface because of buoyancy and circulation in the subduction zone.
foliated rock
A metamorphic rock that displays foliation. Foliated rocks include slate, phyllite, schist, and gneiss.
foliation
A set of flat or wavy parallel planes produced by deformation.
gneiss
A light-colors poorly foliated rock with coarsse bands of segregated light and dark minerals throughout, produced by high-pressure, high-temp metamorphism.
nonfoliated granoblastic rock
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high pressure metamorphism
Metamorphism occurring at high pressure…
marble
A granoblastic rock produced by the metamorphism of limestone or dolostone.
metamorphic facies
Groupings of metamorphic rocks of various mineral compositions formed under different grades of metamorphism from different parent rocks.
metasomatism
A type of metamorphism in which a rock’s bulk composition changes only because of fluid transport of chemcial substances into or out of rock.
phyllite
A foliated rock that is intermediate in grade between slate and schist. Small crystals of mica and chlorite give it a more or less glossy sheen.
quartzite
A very hard, white granoblastic rock derived from quartz-rich sandstones.
regional metamorphism
Metamorphism caused by high pressures and temperatures that extend over large regions, as happens where plates collide.
schist
A meramorphic rock characterized by the pervasive coarse, wavy foliation known as schistosity.
