Ch15_Outline

Ch15_Outline - Chapter 15 Mass Wasting: The Work of Gravity...

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1 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
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2 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
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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_Outline - Chapter 15 Mass Wasting: The Work of Gravity...

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