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35 Cards in this Set
- Front
- Back
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asperities
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frictional locks
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compression waves
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p-waves push and pull quickest to spread
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Shear waves
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s-waves move perpendicular to wave direction
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rayleigh waves
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heaving motion
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love waves
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side to side ground damage
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richter magnitude scale
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measures amplitude of largest S-wave
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modified mercalli scale
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qualitative based on vibration and damage
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divergent plate boundaries
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crustal extension with rift zones and sea-floor spreading
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convergent plate boundaries
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crustal compression suture and subduction
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transform plate boundaries
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crustal shear
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vulcanism (internal)
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the crystallization of molten material on and beneath earths surface
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Lava flows
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non explosive eruptions pahoehoe, aa, pillow lava
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pahoehoe
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ropy and glassy
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aa
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rocky and jagged
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pillow lava
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underwater
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volcanic cones
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large or small EXPLOSIVE sheild volcano, cinder cone, composite cone
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sheild volcano
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continuous balasatic lava flows
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cinder cones
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small cone with multiple vents
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composite cones
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''classic'' cone shape
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batholith
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largest intrusive force forms mountains
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laccoliths
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small intrusion formed by lava flowing between sedimentary layers
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dikes
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lava moves vertically through pre-existing rock
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Diastrophism
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crustal or rock deformation
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Three types of diastrophism
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compressive, tensional and shearing
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warping
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gradual deformation of a large area
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folding
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lateral compression of a crustal section
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monocline folding
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single slope
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anticline folding
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symmetrical upfold
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syncline folding
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symmetrical downfold
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overturned folding
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asymmetrical fold
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Faults
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fracture on which movement occurs on both sides
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normal fault
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extension--tensional stress
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reverse fault
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compression--shortening
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strike-slip
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shear--shearing
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overthrust
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shortening
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