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| | 220Lec20 |
 | | Mass movement or mass wasting refers to the slow or catastrophic (rapid) movement of soils, sediments and rocks down hills, mountains, or other slopes on land surfaces. |
 | | Mass movement may be triggered by catastrophic events, such as floods, earthquakes, or heat from volcanoes (lahars). |
 | | Like erosion, human activities may promote or hinder mass movement by affecting slope inclinations, the amount vegetation on the slopes, the quantity of water in the slope materials, and the amount and the type of materials that are present on the slopes. |
| www.uky.edu /AS/Geology/henke/220/220Lec20.html (1900 words) |
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