GEO 101 Chapter Notes - Chapter 15: Carbonation, Slow Motion, Thermal Expansion
13 Nov 2017
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Document Summary
Weathering, erosion & slopes: produces landscapes, made up of landforms. Gradational processes (degradation): wear down the earth"s surface: weathering (rocks are broken down, mass movement (gravity moves debris, erosion (weathered debris is removed) Gradational agents: running water, glaciers, wind, coastal waves, chemical solution. Physical/mechanical weathering: frost action: water freezes in spaces and expands, rocks destroyed by imposed stresses, no chemical changes, rocks are broken apart. Thermal expansion: different minerals expand and contract at different rates. Salt wedging: growth of salt crystals in spaces in rocks. Angle of repose: maximum angle that loose material forming a slope can maintain without slipping. It is a balance between gravity and friction: the friction is between the particles. If water is added, the friction is reduced and then the slope may fail: solid rock could be 90 degrees, loose material and soil 13-24 degrees.
