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Landslides, Rockfalls, Mudflows, Debris Flows
Debris Flows are moving masses of loose mud, sand, soil, rock and water.
Landslides A USGS fact sheet about landslides and events that trigger them.
Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.
Largest Landslides Heart Mountain and Storegga - Earth*s largest known landslides.
Yosemite Rockfall Photos A photo sequence of a rockfall and debris avalanche by Herb Dunn.
Lahars are mudflows that are composed of volcanic debris and water.
Yosemite Rockfall Hazards Learn what the Park Service is doing to reduce rockfall hazard.
Largest Tsunami The wave with the highest run-up was triggered by a rockfall.
Debris Flow Hazards
Debris Flow Hazards Rapid landslides that can attain speeds over 30 miles per hour.
Saidmarreh Landslide, Iran One of the world*s largest slides - over five cubic miles of debris!
Homeowners Insurance and Landslides Most policies do not cover landslide damage.