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36 Cards in this Set
- Front
- Back
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Downslope resistance to movement or deformation of soil is called.... |
Shear strength |
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In a translational slide, the descending mass... |
moves along a plane approximately parallel to the slope of the surface |
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List the following terms in the order of decreasing velocity (fast first) |
debris avalanche, mudflow, earth flow, creep |
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When soil is saturated with water BLANK increases |
pore pressure |
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the gravel bed load of a stream moves by BLANK |
Sliding and rolling |
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BLANK commonly trigger mass wasting events |
Humans |
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Which of the following factors are how geologists, engineers, and others classify mass wasting? (3) |
Rate of movement, type of material, type of movement |
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If the movement becomes very rapid, a rockslide may break up and become BLANK |
A rock avalanche |
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The rate of movement in a creep is usually |
a centimeter or less per year |
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If, over a period of time, your home develops doors that stick, cracked walls, broken pipes, and cracked driveways BLANK may occurring |
Soil creep |
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Assuming that all other conditions are identical , a slope that s BLANK is more stable |
*more gently inclined |
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A BLANK stream flows in a network of rivulets (sub channels) around numerous sandbars |
braided |
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a cutoff mender may become a crescent-snapped BLANK |
oxbow lake |
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The BLANK is the total area drained by a river and its tributaries |
drainage basin |
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A streams discharge is BLANK |
the volume of water passing through a specific point along the stream in a unit of time |
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A BLANK drainage pattern is one in which streams diverge outward like spokes on a wheel |
Radical |
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The BLANK load is a sediment light enough to remain lifted indefinitely above the bottom by water turbulence |
Saltation |
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Floods frequently are described by BLANK the average time between floods of a given size. |
recurrence interval |
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Shale is a common BLANK because it retards the flow of ground water |
Aquitard |
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An BLANK rock is one that does not allow water to flow through it easily |
impermeable ( Clay Shale) |
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A BLANK aquifer is completely filled with water under pressure and is separated from the surface by an aquitard |
confined |
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BLANK water is water that contains relatively large amounts of dissolved calcium and magnesium. |
Hard |
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in unconfined aquifers water in shallow wells BLANK |
will rise to the level of the water table |
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A BLANK is a body of water separated from the main water table by a zone that is not saturated |
perched water table |
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Rocks typically exhibit BLANK behavior at or near the surface where temps and pressure are low |
Brittle |
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Normal and reverse faults are the most common types of BLANK |
dip-slip faults |
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BLANK is the compass direction of a line formed by the intersection of a inclined plane and an imaginary horizontal plane. |
Strike |
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A BLANK fold has been overturned to such a extent that the limbs are essentially horizontal |
recumbent |
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According to the plate tectonic theory, the San Andreas fault is a transform boundary that separates the North American plane from the BLANK |
Pacific plate |
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Rupture begins at the BLANK and the spreads rapidly along the fault plane |
focus |
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BLANK waves tend to be incredibly destructive to buildings because they produce much ground movement and take a long time to pass. |
Surface |
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The point within the earth where seismic waves first originate is the BLANK |
focus |
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the time interval between the first arrival of the P-wave and the first arrival of the S-waves BLANK with the distance from the focus of an earthquake. |
increases |
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the most important concentration of earthquakes by far is BLANK |
the Circumpacific belt |
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The effects of ground motion caused by an earth quake do not include Blank |
volcanism |
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Richter scale values above 7 are not accurate. The BLANK scale is a more objective method of measuring energy of large earthquakes |
movement magnitude |
