meta - FOLIATED (fine coarse) slate phyllite schist gneiss...

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metamorphic rocks
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definitions metamorphism : solid-state recrystallization of pre-existing minerals as a result of changes in pressure and temperature or addition of fluids prograde metamorphism retrograde metamorphism NO MELTING!
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definitions, part deux protolith : pre-existing rock sedimentary (use prefix ‘para-’) pelitic quartz sandstone limestone igneous (use prefix ‘ortho-’) ( metamorphic )
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definitions, part trois foliation : compositional layering in metamorphic rocks; prominent in micaceous rocks schistosity : fine-layering gneissic banding : coarse-layering porphyroblast : outsized (excessively large) grain in metamorphic rocks augen : eye-shaped grains in metamorphic rocks
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types of metamorphism regional metamorphism contact metamorphism hydrothermal metamorphism (metasomatism) dynamic metamorphism (cataclasis) impact metamorphism
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contact metamorphism
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dynamic metamorphism
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metamorphic rocks (by texture)
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Unformatted text preview: FOLIATED (fine coarse) slate phyllite schist gneiss metamorphic rocks (by texture) NON-FOLIATED quartzite marble 100 MPa = 1 kbar 1 kbar ~ 3 km depth metamorphic facies: greenschist actinolite (green-gray amphibole) also: chlorite (green mica) +/-albite (plagioclase) +/-epidote (green) metamorphic facies: blueschist glaucophane (blue amphibole) also: jadeite (green pyroxene) +/-albite +/- garnet +/-muscovite +/- quartz +/- kyanite metamorphic facies: amphibolite garnet hornblende (amphibole) plagioclase also: biotite, quartz, olivine, staurolite sillimanite pyroxene (depending on protolith) metamorphic facies: granulite garnet quartz & feldspar pyroxene metamorphic facies: eclogite garnet omphacite (pyroxene) kyanite coesite (quartz) metamorphic index minerals (for pelitic rocks) chlorite biotite garnet staurolite kyanite sillimanite increasing grade sillimanite staurolite...
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This note was uploaded on 06/03/2011 for the course GEOL 201 taught by Professor Baruah during the Fall '10 term at South Carolina.

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meta - FOLIATED (fine coarse) slate phyllite schist gneiss...

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