Movement of Large Amounts of Material Downhill under Gravity

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Mass-Wasting Movement of Large Amounts of Material Downhill under Gravity.

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Presentation transcript:

Movement of Large Amounts of Material Downhill under Gravity Mass-Wasting Movement of Large Amounts of Material Downhill under Gravity

Soil Creep

Soil Creep, California

Colluvium, San Bernardino Mountains, California

Mystery or Soil Creep?

Four Years’ Mass-Wasting, Bosnia

Four Years’ Mass-Wasting, Bosnia 100*40/2 cm2 = 2000 cm2 (4 years) = 500 cm2 /year Removed from 1 km slope per year = 500 cm2 /100,000 cm = 1 cm/200 yr = 5000 cm (50 m)/m.y. = 50m /m.y. A 1-m (100 cm) soil mantle yields 500 cm2 /year, so movement = 500 cm2 /year/100 cm = 5 cm/year

Mudflows, California

Urban Planning, San Diego

Avalanche Chute, Colorado

Landslide, Mount Saint Helens

Sherman Glacier, Alaska, March 27, 1964

Viaont, Italy, October 9, 1963 1800 people died.

Yungay, Peru, May 31, 1970

Yungay, Peru, May 31, 1970

Lituya Bay, Alaska, July 9, 1958

Lituya Bay, Before and After

The Scour Line

The Highest Wave Ever Recorded