Lecture23 - Quote of Day Nothing is predestined: The...

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Quote of Day Nothing is predestined: The obstacles of your past can become the gateways that lead to new beginnings. ( Ralph Blum ) http://www.inspirational-quotes.info/inspirational-quotes-1.html
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Mass wasting and landform development ¾ Mass wasting refers to downslope movement of rock, regolith (weathered rock), and soil under direct influence of gravity ¾ Can sometimes be catastrophic, resulting in significant loss of life. 1970 - earthquake triggered a rock avalanche that traveled 14 km from mountains to a valley at ~150 km/hr; killed tens of thousands of people. Populated valley before avalanche. Valley after avalanche. http://www.ldeo.columbia.edu/edu/dees/ees/ies2/masswasting/sld011.html Figure 15.1
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Year Location Type Fatalities 1916 Italy, Austria Landslide 10,000 1920 China Earthquake triggered landslide 200,000 1945 Japan Flood triggered landslide 1,200 1949 USSR Earthquake triggered landslide 12,000-20,000 1954 Austria Landslide 200 1962 Peru Landslide 4,000-5,000 1963 Italy Landslide 2,000 1970 Peru Earthquake related debris avalanche 70,000 1985 Columbia Mudflow related to volcanic eruption 23,000 1987 Ecuador Earthquake related landslide 1,000 http://www.tulane.edu/~sanelson/geol204/masswastproc.htm Some mass wasting events in the 20th century that have been fatal
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Classification of mass-wasting processes (following Stephen Nelson’s lead) Slope Failures - sudden failure of slope resulting in debris sliding, rolling, falling, or slumping down hill Slumps Falls Slides Sediment Flows - debris mixed with water or air moving down hill Slurry flows Solifluction Debris flows Mudflows Granular flows Creep Earthflows Grain flows Debris avalanches
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Slope Failures Slumps Sliding of relatively intact material along concave up
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This note was uploaded on 04/18/2011 for the course EAS 101 taught by Professor Kirschner during the Spring '11 term at Saint Louis.

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Lecture23 - Quote of Day Nothing is predestined: The...

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