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12 Cards in this Set
- Front
- Back
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Foliated |
The dominant agent of metamorphism is pressure |
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Crystalline |
The dominant agent of metamorphism is heat/temperature |
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Platy or elongated |
Align themselves parallel to the axis of pressure, resulting in a layered appearance or foliation |
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Slaty |
The foliation, though may not appear foliated in the naked eye, will however manifest itself physically in the rock's tendency to separate along parallel planes. |
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Phyllitic |
Barely visible to the naked eye. Alignment results in an obvious but not clearly-defined foliation. |
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Schistose |
Visible to the naked eye. Layering is more distinct. Usually composed of platy materials like chlorite, graphite, biotite and muscovite |
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Gneissic |
Visible and elongated. Exhibits a coarsely-branded appearance due to the alignment of minerals like amphibole, feldspar, and quartz. |
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Crystalline |
Texture results when the parent rock is exposed with enough heat that it induces recrystallization of the existing minerals. Usually composed of only one type of mineral. |
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Regional Metamorphism |
Tectonic processes involved in this process, which produces mountain chains, are _________ in scale. |
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Contact Metamorphism |
Process where dominant factor is heat. The parent rocks may undergo a fundamental change in texture sue to recrystallization, or even change in mineralogy hen chemically-active fluids are also involved. |
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Dynamic Metamorphism |
Faulting as a factor for this process to happen |
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Shock Metamorphism |
Meteorite impact as a factor for this process to happen |
