Assignment 9 petrography and pelitic samples

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School

University of Cincinnati, Main Campus *

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3003C

Subject

Geology

Date

Oct 30, 2023

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docx

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Rock/section name: M-31 - Minerals: opaques, quartz, muscovite and biotite. - Meta facies: start of greenschist - Notes on fabric: cleavage is the orientation, fractured. Notes on texture: foliation Name: biotite grade slate Rock/section name: VT-17 - Minerals: biotite, muscovite, quartz and kyanite - Meta facies: greenstone - Notes on fabric: there are two foliations. One is new biotite foliation cutting through the other old foliation at ~90 degrees. Notes on texture: foliation but has not ruined the bedding yet. Name: Phyllonite Rock/section name: 1079 - Minerals: andalusite, opaques, quartz, muscovite/sericite, and maybe some biotite in the matrix. - Meta facies: greenschist - Notes on fabric: Notes on texture: Name: Andalusite slate Rock/section name: KS-1 - Minerals: kyanite, muscovite, biotite, garnet, quartz and plagioclase. - Meta facies: Amphibolite - Notes on fabric: does not look to be bedded or foliated Notes on texture: rather large grained Name: Garnet kyanite schist Rock/section name: 88004 - Minerals: biotite, garnet, sillimanite and minor muscovite. - Meta facies: upper amphibolite - Notes on fabric: bedded but messy, not clean bedding. Notes on texture: bedded garnet biotite then muscovite Name: Restite; a biotite garnet sillimanite gneiss Rock/section name:GC-4

- Minerals: Biotite, garnet, muscovite, quartz, kyanite, fibrolite/sillimanite and staurolite. - Meta facies: Upper amphibolite facies - Notes on fabric: Notes on texture: Name: Schistose-gneiss Rock/section name: 88GF10 - Minerals: quartz, possible mica is fine grained groundmass. - Meta facies: Greenschist - Notes on fabric: too fine grained to tell Notes on texture: unbelievably fine grained Name: Slate Rock/section name:4 - Minerals: garnet, biotite, muscovite, opaque, quartz, tourmaline, graphite and small amounts of plagioclase - Meta facies: Upper greenschist - Notes on fabric: zones of elongated quartz veins along with muscovite veins too, recrystallization? Notes on texture: rather fine grained and semi foliated. Name: Garnet schist Rock/section name: GK-1 - Minerals: Lots of garnet and quartz inclusions very little kyanite, prismatic sillimanite - Meta facies: upper amphibolite and granulite facies - Notes on fabric: sillimanite has relief and cleavage that runs corner to corner east west orientation Notes on texture: fine grained rock Name: Sillimanite garnet gneiss **Adirondack granulite facies rocks

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