GEOL 101 Study Guide - Final Guide: Karst, Oxbow Lake, Debris Flow
31 Jul 2017
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Units: 12, 13, 14, 15, 16, 17, 20. Larger, angular particles = higher angle of repose. Instability creator: vegetation, reduce the impact of soil saturation and mass movement in two ways, root network stabilizes slope, plants remove excess moisture from soil, earthquakes, apply sudden force on saturated sediments. Water in pores move upward causing sediment grains to settle downward and lose stability. Levee: discontinuous, wedge-shaped ridges on margins of streams and rivers between meanders: oxbow lake: curved lake that is created when a stream cuts off a meander, base level: horizontal surface defined by sea level. Drainage patterns: controlled by three factors, topography, surface materials, regional fractures/faults, four types exist, dendritic, resembles the branching pattern of trees, forms when surface material is uniform in composition. More erosion occurs because water can move larger particles: wide streams, has low discharge velocities, common in flat terranes, slower flowing water can only move small particles.
