13. Criteria for Mass Wasting Type of material… Type of movement… Rate of movement… Rock, debris, soil, mud Fall, slide, slump, flow, creep Fast, slow, not visible
14. Falls Very rapid movement, talus formation, often triggered by earthquakes.
16. Flow Slow to rapid movement but often appears to have a plastic movement (Debris-flow vs. Mudflow)
17. Solifluction Common in areas of permafrost, very slow movement when frozen surface melts in summer
18. Creep Slowest flow, visible through features such at tilted trees or telephone poles
19. How do we control masswasting? Improve drainage Ditches, gutters, vegetation, drainpipes Decrease slope Cut and fill, benching Build retaining walls Provide support at the bottom of a slope
20. References Text and Figures Schaetzl, Randy, 2011, Masswasting, Environmental Geomorphology 306 Steinbis, Martin, 20ll, Masswastepdf, Geology 100 Pictures Clip art images