Metamorphic Rock Identification

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7 Terms

1
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<p>Gneiss</p>

Gneiss

Grain Size: Medium to Coarse
Fabric/Texture: Foliation/Mineral Banding
Mineralogy: Quartz, feldspar, mica, hornblende
Metamorphic Grade: High
Protolith: Shale, granite

2
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<p>Schist</p>

Schist

Grain Size: Varies
Fabric/Texture: Foliation, Schistosity
Mineralogy: Quartz, feldspar, micas, sometimes chlorite
Metamorphic Grade: Medium to High
Protolith: Shale, basalt

3
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<p>Phyllite</p>

Phyllite

Grain Size: Fine
Fabric/Texture: Foliation, slight schistosity
Mineralogy: Quartz, feldspar, mica, sometimes chlorite
Metamorphic Grade: Medium to High
Protolith: Shale

4
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<p>Slate</p>

Slate

Grain Size: Very fine
Fabric/Texture: Foliated, slaty cleavage
Mineralogy: Minor clay, micas, quartz, feldspar
Metamorphic Grade: Low
Protolith: Shale

5
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<p>Quartzite</p>

Quartzite

Grain Size: Medium
Fabric/Texture: Massive
Mineralogy: Quartz, mica, some feldspar
Metamorphic Grade: Low to High
Protolith: Quartz Sandstone

6
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<p>Marble</p>

Marble

Grain Size: Medium to Coarse
Fabric/Texture: Massive
Mineralogy: Calcite
Metamorphic Grade: High
Protolith: Limestone

7
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<p>Serpentinite</p>

Serpentinite

Grain Size: Fine to Medium
Fabric/Texture: Massive
Mineralogy: Serpentine
Metamorphic Grade: Low
Protolith: Peridotite