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17 Cards in this Set

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Terranes
displaced and migating pieces of the earths crust
along the ridge of a fold, layers that seem to slope downward and away from the axis of a fold produce:
an anticline
the greatest amount of crustal shortening would be associated with:
a thrust fault and overturned fold
faulting
when rock strata are strained beyond their ability to remain a solid movement, displacement will occur.
tensional stress along a fault can result in a dropped hanging wall blocked relative to the footwall side producing a :
normal fault
compression stress then, to block relative hanging wall produces a:
reverse fault
An exposed footwall with verticle extent to the fault plane is:
an excarpment
transform faults along plate boundaries are characteristics of
lateral motions of plates
What two scales do scientists record earthquakes:
a. Qualitative damage intensity scale
(Mercali scale)

b. Qualative magnitude of energy released scale = the moment magnitude scale
P Waves vs S Waves:
Primary Waves "push and pull"

Secondary Waves vibrate the rock
Motion of sesmic waves are located along:
the fault
Area above focus that produce shockwavesthat radiate outward comes from:
the epicenter
what records vibrations in the crust?
seismograph
Theory of behavior of fault motion:
The elastic rebound thoery
Explosive eruptions tend to build up
composite volcanoes, such as the castcades and mt st helens
Volcanoes formed from silica rich magma
are highly explosive and dangerous
Lava plateaus are formed from_____ magma that has ____ vilocity
basaltic; low