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Mass Wasting Physical Geology Chapter 9
Tim Horner, CSUS Geology Department
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Table 9.1 Flow, slide and fall:
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Figure 9.1 Flow, slide and fall:
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Gravity and mass wasting:
Figure 9.2 Gravity and mass wasting: Factors: 1) Shear force (parallel to slope, down slope) 2) Shear resistance (parallel to slope, up slope) 3) Normal force (perpendicular to slope) 4) Gravitational force (downward)
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Figure 9.3 Moisture Excess moisture: pore pressure increases, this reduces shear strength Low moisture: also reduces shear strength Intermediate moisture: soil sticks together, shear strength is highest
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Figure 9.4 Creep
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Figure 9.5a Creep
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Figure 9.5b Creep
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Figure 9.5c Creep
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Earth Flow Particles move relative to each other (not as a solid mass)
Figure 9.7 Earth Flow Particles move relative to each other (not as a solid mass)
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Earth Flow with rotational slide
Figure 9.8 Earth Flow with rotational slide
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Debris Flow Coarser material Speed varies (with water content)
Figure 9.11 Debris Flow Coarser material Speed varies (with water content)
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Mud Flow- finer, often volcanic material
Figure 9.12 Mud Flow- finer, often volcanic material
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Figure 9.13 Mud Flow
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Figure 9.14a Rock Fall
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Figure 9.14b Rock Fall
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Rock Fall- Yosemite valley, 1996
Figure 9.17 Rock Fall- Yosemite valley, 1996
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Talus slope below rock fall
Figure 9.16 Talus slope below rock fall
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Figure 9.18a Rock slide- Italy 1963
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Human problems, engineered solutions
Figure 9.20 Human problems, engineered solutions
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Human problems, engineered solutions
Figure 9.21 Human problems, engineered solutions
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Human problems, engineered solutions
Figure 9.22 Human problems, engineered solutions
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Human problems, engineered solutions
Figure 9.23 Human problems, engineered solutions
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Human problems, engineered solutions
Figure 9.24 Human problems, engineered solutions
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TABLES
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Figure 9.18b
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Figure 9.19
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Box 9.1 Figure 1
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Box 9.1 Figure 2a
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Box 9.1 Figure 2b
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Box 9.1 Figure 2c
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Box 9.3 Figure 1
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Table 9.2
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