11: Erosion Weathering – disintegration and decomposition - ppt video online download

11: Erosion Weathering – disintegration and decomposition - ppt video online download: Mass Wasting Def: The downslope movement of rock, regolith and soil under the direct influence of gravity Gravity is the controlling force. Important triggering factors: Saturation of the material with water . Destroys particle cohesion Water adds weight Over-steepening of slopes. Unconsolidated granular particles assume stable slope called the angle of repose . Stable slope angle different for various materials. Over-steepened slopes are unstable. Removal of anchoring vegetation. Ground vibrations from earthquakes. Google Images: Landslide (Massive Landside, 3:21)