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17 Cards in this Set
- Front
- Back
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Terranes
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displaced and migating pieces of the earths crust
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along the ridge of a fold, layers that seem to slope downward and away from the axis of a fold produce:
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an anticline
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the greatest amount of crustal shortening would be associated with:
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a thrust fault and overturned fold
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faulting
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when rock strata are strained beyond their ability to remain a solid movement, displacement will occur.
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tensional stress along a fault can result in a dropped hanging wall blocked relative to the footwall side producing a :
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normal fault
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compression stress then, to block relative hanging wall produces a:
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reverse fault
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An exposed footwall with verticle extent to the fault plane is:
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an excarpment
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transform faults along plate boundaries are characteristics of
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lateral motions of plates
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What two scales do scientists record earthquakes:
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a. Qualitative damage intensity scale
(Mercali scale) b. Qualative magnitude of energy released scale = the moment magnitude scale |
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P Waves vs S Waves:
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Primary Waves "push and pull"
Secondary Waves vibrate the rock |
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Motion of sesmic waves are located along:
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the fault
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Area above focus that produce shockwavesthat radiate outward comes from:
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the epicenter
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what records vibrations in the crust?
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seismograph
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Theory of behavior of fault motion:
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The elastic rebound thoery
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Explosive eruptions tend to build up
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composite volcanoes, such as the castcades and mt st helens
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Volcanoes formed from silica rich magma
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are highly explosive and dangerous
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Lava plateaus are formed from_____ magma that has ____ vilocity
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basaltic; low
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