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14 Cards in this Set
- Front
- Back
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Name the 6 barrovian metamorphic zones for pelites |
Chlorite, biotite, Garnet, staurolite, kyanite, silliminite |
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Within what barrovian zone is the greenschist facies |
From chlorite to biotite |
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Within what barrovian zone is the amphibole facies |
From Garnet to silliminite |
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What are the characteristics of pelitic sediments |
Very fine grained, mature, plastic sediments |
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What is the mineralogy of of politic sediments |
Dominated by clays, fine white micas & chlorite. Common is quartz + feldspars |
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What type of rock is formed if temperature in metamorphism continues past silliminite zone |
Migmatites Leucosome_white granitic Melanosome_schistose Palaesome_unaffected schist |
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What is the key mineralogy of the chlorite facies within the barrovian zone |
(Fine grained slates + graphite) Chlorite Muscovite Quartz Albite +pyroxene & k_feldspar |
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What are the characteristics of primary foliations |
Sedimentary structures Thickness changes of layers Changes in grain composition & size Planar layering |
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What are the characteristics of tectonic foliations |
No sedimentary structures Little variation in thickness Composition of layers often bimodal Layering lensoid/anastomosing |
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What are the causes of partial melting |
Temp SiO2 content Amount of dissolved volatiles Oxidation state |
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What is the name of a folitated fault rock |
Mylonite |
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What is the name of an unfoliated fault rock |
Cataclasite |
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What are the characteristics of granular flow |
Porous rock Shallow crust No fractures No effect on grain size |
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What are the characteristics of cataclastic flow |
Non-Porous rock Deeper in the crust New fractures Grain size reduction |
