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Mass Movements

• Mass movement: the downslope

transportation of large masses of earth materials by gravity.

• Erosion: the removal and transport of

materials by natural agents such as wind and running water

All pictures and information, unless otherwise cited, borrowed with permission from Dr. Steve Dutch, UWGB.

http://www.youtube.com/watch?v=mknStAMia0Q

Landslides

• Landslide: the rapid movement of a

mass of bedrock or loose soil and rock down the slope of a hill, mountain, or

cliff.

• Talus: cliff rock fragments that have

been weathered from a cliff and pulled

down by gravity.

More Landslide Videos

http://www.youtube.com/watch?v=H6Ma0SVjMHA

http://www.youtube.com/watch?v=qEbYpts0Onw

Types of Landslides

• Creep

• Slump

• Earthflow

• Mudflow

• Slow

• Medium

• Fast

• Very fast

Creep Soil Creep, California

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Creep

http://www.ndsu.edu/fargo_geology/mass_wasting/slumptypes.htm

Slump

Earthflow--Small

http://www.dcnr.state.pa.us/topogeo/hazards/earthflow.aspx

Earthflow--Moderate

http://www.ngdc.noaa.gov/seg/hazard/icons/small_res/6/6_132.jpg

Earthflow--Severe

http://www.bigbendpaleo.com/Photo%20Gallery/Geology-Paleontology/Mass%20Wasting/Village%20Creek%20-

%20Jefferson%20County,%20Texas%20-%20Earthflow%20Destroys%20House%20-%20Fall%201998.jpg

Mudflow

http://wrgis.wr.usgs.gov/docs/parks/deva/galflood.html

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Yungay, Peru, May 31, 1970