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26 Cards in this Set
- Front
- Back
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3 type of stress |
Compression, Tension, Shear |
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What is compression?(Convergent) |
Set of stress toward the center of the rock mass. Causes folding. |
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What is Tension extension? (Divergent) |
When forces are parell but moving apart from each other. Makeing rocks thinner like gum. |
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What is Shear stress |
When forces cause rocks to slide past each other causing offset features. |
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Two type of deformation |
Brittle: Objects deforms a little then breaks. Ductile: Size and shape change without fracturing( Slow Flow) |
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How are rocks deformed |
Pressure, Temperature,Effect of rock type |
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Effects of rock type |
Crystalline rocks: composed of crystals with strong internal bonds tend to undergo brittle deformation Weakly cemented |
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3 type of crustal deformation |
Folds Faults Joints |
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3 type of Folds |
Anticline, Syncline, Overturned |
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What is a Overturned fold |
When the fold is turned sideways |
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What are joints in deformation structures in rocks |
Fractures in rock with no offsets |
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What are faults in deformation structures in rocks |
A fracture (or crack) in Earths crust where one side has been displaced relative to the other. |
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Six types of faulta |
Normal Reverse Thrust Right-Lateral strike slip Left-Lateral strike slip Oblique |
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Whats a normal fault? |
When the hanging wall moves downward |
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Whats a thrust wall? |
When the hanging wall goes over the footwall |
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What are the left, right lateral strike slip?? |
When the features move horizontal |
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Whats a oblique fault |
When they move all over |
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Whats strike and dip |
Strile is compass direction Dip is where the bed sits |
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Whats a earthquake?? |
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Whats the elastic-rebound theory |
Is the explanation for how energy is released during an earthquake. The rock snap back almost to their original shape |
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Earthquake terminology |
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What are Seismic Waves |
A elastic wave in the earth produced by an earthquake or other means |
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What are wavelength |
Distance between successive crest or troughs |
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What is amplitude |
Height of a peak (or trough) |
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What is frequency |
Number of whole waves(crest to crest) that pass by a fixed point in a period of time |
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What is velocity |
How fast a seismic wave travels |
