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Mass Wasting Physical Geology Chapter 9. Tim Horner, CSUS Geology Department. Table 9.1. Flow, slide and fall:. Figure 9.1. Flow, slide and fall:. Figure 9.2. Gravity and mass wasting:. Factors: 1) Shear force (parallel to slope, down slope)
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Mass WastingPhysical Geology Chapter 9 Tim Horner, CSUS Geology Department
Table 9.1 Flow, slide and fall:
Figure 9.1 Flow, slide and fall:
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)
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
Figure 9.4 Creep
Figure 9.5a Creep
Figure 9.5b Creep
Figure 9.5c Creep
Figure 9.7 Earth Flow Particles move relative to each other (not as a solid mass)
Figure 9.8 Earth Flow with rotational slide
Figure 9.11 Debris Flow Coarser material Speed varies (with water content)
Figure 9.12 Mud Flow- finer, often volcanic material
Figure 9.13 Mud Flow
Figure 9.14a Rock Fall
Figure 9.14b Rock Fall
Figure 9.17 Rock Fall- Yosemite valley, 1996
Figure 9.16 Talus slope below rock fall
Figure 9.18a Rock slide- Italy 1963
Figure 9.20 Human problems, engineered solutions
Figure 9.21 Human problems, engineered solutions
Figure 9.22 Human problems, engineered solutions
Figure 9.23 Human problems, engineered solutions
Figure 9.24 Human problems, engineered solutions
