Term
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Definition
Nonfoliated
Quartz
Fine to Coarse Grained |
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Term
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Definition
Foliated
Quartz, Feldspar, Amphibole, and Pyroxene
Layered
Coarse Grained |
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Term
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Definition
Foliated
Mica, Quartz, Feldspar, Amphibole
Non-Layered
Coarse Grained |
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Term
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Definition
Foliated
Chlorite, Mica, Quartz
Non-Layered
Fine Grained |
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Term
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Definition
Foliated
Chlorite, Mica, Quartz
Non-Layered
Very Fine Grained
Weathered Shale |
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Term
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Definition
| Flat linear feature. Rocks orient at right angles to the stress |
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Term
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Definition
Results from the combined action of high temperature and directed stresses
Characteristically folded into mountain belts
Crushed, Sheared, and Stretched |
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Term
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Definition
| Results from high temperatures and a vigorous solution activity concentrated near the contacts of cooling magma |
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Term
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Definition
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Term
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Definition
1) Chemical Recombination
2) Deformation and rotation of the constituent mineral grains
3) Recrystallization of minerals |
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Term
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Definition
| Rocks changed by heat, pressure and chemical action of fluids and gases |
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Term
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Definition
Nonfoliated
Calcite or Dolomite
Fine to Coarse Grained |
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Term
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Definition
Clastic
Rounded fragments of any rock type--quartz, quartzite, chert dominant
Coarse Grained |
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Term
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Definition
Clastic
Angular Fragments of any rock type--Quartz, quartzite, chert dominant
Coarse Grained |
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Term
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Definition
Clastic
Quartz with minor accessory minerals
Medium Grained |
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Term
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Definition
Clastic
Quartz with at least 25% feldspar
Medium Grained |
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Term
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Definition
Clastic
Quartz and clay minerals
Fine Grained |
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Term
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Definition
Clastic
Quartz and clay minerals
Very Fine Grained |
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Term
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Definition
Chemical Precipitate
Calcite (CaCO_3)
Medium to Coarse Grained |
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Term
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Definition
Chemical Precipitate
Calcite (CaCO_3)
Fossils and fossile fragments loosely cemented |
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Term
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Definition
Chemical Precipitate
Chalcedony (SiO_2)
Cryptocrystalline, dense |
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Term
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Definition
Chemical Precipitate
Gypsum
Fine to Coarse crystalline |
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Term
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Definition
Chemical Precipitate
Halite (NaCl)
Fine to Coarse crystalline |
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Term
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Definition
are deposited at the earths surface at normal temperatures and pressures.
are composed of materials which are abundant in other rocks and are stable under surface temperatures and pressures |
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Term
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Definition
1) Physical and Chemical weathering of parent rock material
2) Transportation of the weathered products by running water, wind, gravity, or ice
3) Deposition of the material in a sedimentary basin
4) Compaction and cementation of the sediment into a solid rock |
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