ERTH 2415 Lecture Notes - Lecture 15: Friction, Silt
14 Mar 2019
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Name for the movement downslope of earths materials bec of gravity. Stops things from going up drags things down. More stable when slope if opposite fractures o internal water. Rock wearing away bec of several cycles of water freezing and melting. 4 oxygens around one si form chains sheets and 3d structures. Attract water and positively charged particles o o o. Made from other rocks under heat and pressure. Mass movement occurs mostly in sedimentary rock o o. Mass movement involving motion along a failure surface. Special case of translational slide in which movement of earth material results from liquefaction of subjacent material. Bec of pressure of salt in ocean water. Clays are leached by fresh water from rain and snow melt. Failure is retrogressive starts on riverbed and moves inland. Phenomenon in which the strength of soil is reduced by rapid and violent shaking, or loading.
