mass wasting geol 10 - cabrillo college - …dschwartz/documents/masswasting_geol_10.pdf ·...
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Complex movement in which Slumping occurs at the head, followed by an Earthflow.
Fig. 14-19, p.418
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March 1995 at La Conchita, California
Mass Wasting
La Conchita Ca 1995
Mass Wasting
La Conchita
Jan 10th, 2005
Show this:
• http://news.bbc.co.uk/2/hi/europe/8517378.stm
• https://www.youtube.com/watch?v=TfvmbDOeo70
• rocky debris flow
• Hawaii mega tsunami
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A Long Run-Out SlideOr
Debris AvalancheThe Frank Slide, Alberta Canada1903. Killed 70 - 90 people. Block of rock 650m high 900m wide, 150m thick, fell for ~103 seconds, at ~70mph. Travelled over 3Km.
Acoustic Fluidization?Air cushion?
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Relative slope-stability map of part of San Clemente, California
Fig. 14-30, p.425 Fig. 14-31, p.426
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Fig. 14-32, p.426
Giant Hawaiian Landslides
Lituya Bay Alaska7 miles long, 2 miles wide
Mega-Tsunami on July 9th, 1958Cause: Giant Rockfall triggered by an earthquake
http://geology.com/records/biggest-tsunami.shtml
Max Height of wave ~1,720 feet (516M)All trees and vegetation were completely stripped away in Gilbert Inlet