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19 Cards in this Set
- Front
- Back
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Dip Slip Fault - Reverse Fault |
Reverse faults are dip slip faults where the hanging wall block moves up relative to the footwall (lower) block |
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Thrust Faults |
Low angle reverse Fault where the overlying blocks are thrust horizontally over the underlying blocks |
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Strike Slip or Normal Fault |
Dominant displacement along strike Slip Fault is horizontal and parallel to the direction of the Fault surface |
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Joint |
Fractures along which no displacement has occurred & most are formed when rocks in the outer crust are deformed |
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Orogenesis |
Processes that make a mountain belt occurs at convergent plate boundaries (compressional mountains) |
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Andean type mountain building |
Oceanic continental crust convergence - subduction- melting- compression thickens crust- continental volcanic arc forms- accretionary edge forms - Sierra Nevada and California |
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Collisional belt- cordilleran mountain type- |
ocean will never close- collision and accretion of small crystal fragments to continental margins |
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Continental. Collisions |
Alpine mountains- 2 plates converge (continents meet) Himalayan and Tibetan plateau |
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Formation of igneous rock: |
Forms as magma cools and solidifies beneath or at earths surface |
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Sedimentary rocks |
Lithified products of weathering |
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Metamorphic rocks |
Can form from igneous, sedimentary or metamorphic rocks that are subjected to heat pressure and chemically active fluids |
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Fine grained rock formation: |
Rapid cooling at the surface or small masses within the upper crust |
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Glassy texture |
Very rapid cooling when molten rock is ejected into the atmosphere |
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Setting that metamorphism occur |
Regional- mountain building when quantities of rock are under stress and deformation Contact metamorphism- when rock is in contact with it near magma |
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Agents of metamorphism |
Heat Pressure Chemically active fluid |
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Metamorphic texture |
Foliated- mineral crystal giving rock a layered look (slate) Nonfoliated- equidimensional and not aligned (marble) |
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Unconformities: angular |
Angular- young horizontal sedimentary rocks on top Older tilted sedimentary on bottom |
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Disconformity |
Younger horizontal sedimentary rocks on top Older horizontal sedimentary rocks on bottom |
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Non conformity |
Younger horizontal sedimentary rocks on top Older igneous or metamorphic rocks on bottom |
