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22 Cards in this Set
- Front
- Back
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Metamorphic rock |
Changes from one form to another |
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Pressure |
System of forces that has the same magnituted in all directions |
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Foliation |
Layering of rock |
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Protolith |
Meta rock that was metamorphosed |
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Recrystalization |
Rock changes in a solid state by moving atoms |
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Granofels |
Whose mineral grain lack a strong foliation |
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Schist and gneiss |
Display foliation. Schist is phaneritic. |
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Slate |
Part of schist. Microscopic grains |
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Phyllite |
Part of schist. Very small (aphanitic) grains |
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Porphyroblastic texture |
Larger grains in groundmass grew larger as a result of porphyroblasts |
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Porphyroclasts |
Large grains are derived from protolith |
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Slate |
- dull surface luster -aphanitic - red slate contains hematite /green slate and black slate - mudstone or shale -has clay minerals -foliated |
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Gneiss |
-phaneritic rock -contains quatz, felspar, mica minerals -resembers granitic rock -mudstone or shale |
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Quartzite |
- composed of quartz -quartz sandstone (possible protolith) |
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Marble |
-composed of calcite, aragonite, dolomite -protolith is limestone or dolostone |
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Schist |
- composition is mica, muscovite, biotite, chlorite or amphobile - protolith is mudstone or sandy mudstone |
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Soapstone |
-composition is talc, serpentinite, quatzs -protolith is mudstone
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Phyllite |
-composition mica, chlorite -foliated -protolith is mudstone or sandymudstone |
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Muscovite |
Mica mineral1 perfect cleavage Flexible sheetsSheets composed of light brown to silver |
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Biotite |
Separate into thin flexible sheets Dark brown or black |
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Chlorite |
Green to blue green 1 perfect cleavage |
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Talc |
White to green 1 perfect cleavage |
