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module 7
violent earth
19
Geology
Undergraduate 3
11/05/2008

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Cards

Term
angle of repose
Definition
is the steepest angle at which any loose material is stable
Term
cohesion
Definition
is an important force holding soil grains together. surface tension of water between loose grains or cement between grains
Term
creep
Definition
move slowly in a gradual process
Term
debris avalanche
Definition
rockfalls in which the material breaks into numerous small fragments that flow at high velocity as a coherent stream
Term
frictional resistance
Definition
the resistance to down slope movement of a flow or landslide
Term
liquefaction
Definition
a process in which water saturated sands jostled rearrange themselves into a closer packing arrangement. the expelled water spouts to form a sand boil.
Term
load
Definition
the weight of material on a slope
Term
permeability
Definition
the ease with which water can move though soils or rocks
Term
rockbolts
Definition
long bolts drilled into and expanded in an unstable rock mass to help keep it from landsliding
Term
rockfalls
Definition
a rock mass that falls from a steep slope
Term
rotational slide
Definition
a landslide in which the mass rotates as it slides on a basal slip surface. also called a slump.
Term
slope angle
Definition
the angle of a slope as measured down from the horizontal
Term
snow avalanche
Definition
downslope movement of snow
Term
surface tension
Definition
the effect by which grains of sand are help together by thin films of water between them
Term
talus
Definition
coarse, angular rock fragments that fall from a cliff to form a cone shaped pile banked up against the slope
Term
translational slide
Definition
a landslide that moves approximately parallel to the slope of the ground
Term
water pressure
Definition
the pressure of water spaces between grains in the ground
Term
debris flow
Definition
a slurry of rocks, sand, and water flowing down a valley. water generally makes up less than half the flows volume
Term
deep seated slide
Definition
below the surface
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