GEOL 1001 Chapter : Geology Chapter 13
Document Summary
Angle of repose: the angle of the steepest slope that a pile of uncemented material can attain without collapsing from the pull of gravity. Avalanche: a turbulent cloud of debris mixed with air that rushes down a steep hill slope at high velocity; the debris can be rock and/or snow. Lahar: a thick slurry formed when volcanic ash and debris mix with water, either in rivers or from rain or melting snow and ice on the flank of a volcano. Landslide: a sudden movement of rock and debris down a nonvertical slope. Terra firma: solid foundation on which they can build their lives. Submarine slump: the underwater downslope movement of a semicoherent block of sediment along a weak mud detachment. Debris flows: a downslope movement of mud mixed with larger rock fragments. Turbidity currents: a submarine avalanche of sediment and water that speeds down a submarine slope. Stable slopes: a slope on which downward movement is unlikely.
