Ch15_As Presented

Ch15_As Presented - Chapter 15 Mass Wasting: The Work of...

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Unformatted text preview: Chapter 15 Mass Wasting: The Work of Gravity Mass wasting and landform development Mass wasting refers to the downslope movement of rock, regolith, and soil under the direct influence of gravity Role of mass wasting Geologic process that often follows weathering Combined effects of mass wasting and running water produce stream valleys Mass wasting and landform development Slopes change through time No minimum angle is required for mass wasting to occur Most rapid and spectacular mass-wasting events occur in areas of rugged, geologically young mountains Mass wasting and erosional processes slowly lower the land surface Controls and triggers of mass wasting Important factors include The role of water Diminishes particle cohesion (friction) Water adds weight Oversteepening of slopes slope angle Stable slope angle ( angle of repose ) is different for various materials Oversteepened slopes are unstable The effect of water on mass wasting Figure 15.4 Controls and triggers...
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This note was uploaded on 07/17/2008 for the course GS 121 taught by Professor Leavell during the Fall '07 term at Ohio State.

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Ch15_As Presented - Chapter 15 Mass Wasting: The Work of...

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