16+annotated+mass+wasting

16+annotated+mass+wasting - Mass Wasting Fig. 16.open La...

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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Fig. 16.open La Conchita, CA Mass Wasting
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Downslope forces = Gravity. The weight of Earth materials. The weight of added water. The weight of added structures. Resisting forces = Material strength. Cohesion. Chemical bonds. Electrical charges. Surface tension. Friction. Steeper slopes = larger forces. Slope Stability
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Slope Stability Loose granular material assumes a slope angle. l Angle of repose z is a material property due to. .. Particle size, shape, and surface roughness. Typical angles of repose. Fine sand 35 o Coarse sand 40 o Angular pebbles 45 o
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Figure 15.4
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Failure Surfaces Weak subsurface layers can initiate motion. Types of l failure surfaces z include Saturated sand or clay layers. Joints parallel to the surface. Weak sedimentary bedding (shale, evaporites). Metamorphic foliation.
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak
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Chapter 16: Unsafe Ground: Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Mass Movements Mass movements are important to the rock cycle. The initial step in sediment transportation. A significant agent of landscape change. All slopes are unstable! They change continuously! Mass movement is often aided by human activity.
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Landslides and Other Mass Movements Earth: Portrait of a Planet, 3 rd edition, by Stephen Marshak Types of Mass Wasting Classified based on 4 factors. Type of material (rock, regolith, snow, or ice). Rate of movement (fast, intermediate, or slow).
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16+annotated+mass+wasting - Mass Wasting Fig. 16.open La...

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