GEOG 1290 Lecture Notes - Lecture 16: Hydraulic Action, Alluvium, Dissolved Load

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Lecture 16 chapter 14 + 15 + 16. Rocks are weathered below the soil as well as when exposed to the surface. Resulting materials move down hill by mass wasting acting under the force of gravity. Slopes - a patch of land surface that is inclined from the horizontal. Made up of or at least covered by loose debris (e. g. , soil, regolith or rock) They are subjected to a force greater than the friction holding them together. Angle of repose - maximum angle that loose material forming a slope can maintain without slipping. It is a balance between gravity and friction. 4 types of mass movement slow motion of soil layer: creep. Due to alternate freeze/thaw or wet/dry cycles. Also due to needle ice, heating and cooling, animal disturbance and earthquakes. Soil and rock are saturated and slowly move downslope. Drainage is inhibited: earth flow - saturated slope materials flow downslope.

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