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Mass Wasting Physical Geology Chapter 9 Tim Horner, CSUS Geology Department.

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Presentation on theme: "Mass Wasting Physical Geology Chapter 9 Tim Horner, CSUS Geology Department."— Presentation transcript:

1 Mass Wasting Physical Geology Chapter 9 Tim Horner, CSUS Geology Department

2 Table 9.1 Flow, slide and fall:

3 Figure 9.1 Flow, slide and fall:

4 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)

5 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

6 Figure 9.4 Creep

7 Figure 9.5a Creep

8 Figure 9.5b Creep

9 Figure 9.5c Creep

10 Figure 9.7 Earth Flow Particles move relative to each other (not as a solid mass)

11 Figure 9.8 Earth Flow with rotational slide

12 Figure 9.11 Debris Flow Coarser material Speed varies (with water content)

13 Figure 9.12 Mud Flow- finer, often volcanic material

14 Figure 9.13 Mud Flow

15 Figure 9.14a Rock Fall

16 Figure 9.14b Rock Fall

17 Figure 9.17 Rock Fall- Yosemite valley, 1996

18 Figure 9.16 Talus slope below rock fall

19 Figure 9.18a Rock slide- Italy 1963

20 Figure 9.20 Human problems, engineered solutions

21 Figure 9.21 Human problems, engineered solutions

22 Figure 9.22 Human problems, engineered solutions

23 Figure 9.23 Human problems, engineered solutions

24 Figure 9.24 Human problems, engineered solutions

25 TABLES

26 Figure 9.18b

27 Figure 9.19

28 Box 9.1 Figure 1

29 Box 9.1 Figure 2a

30 Box 9.1 Figure 2b

31 Box 9.1 Figure 2c

32 Box 9.3 Figure 1

33 Table 9.2


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