Avalanche | Definition, Causes, & Facts | Britannica
2024年12月2日 · Avalanche, a mass of material moving rapidly down a slope. An avalanche is typically triggered when material on a slope breaks loose from its surroundings; this material then quickly collects and carries additional material down the slope. There are various kinds of avalanches, including rock
What Causes Rock Avalanches? - Eos
2017年4月24日 · Rock avalanches, sudden rock slope failures characterized by very rapid velocities, long runouts, and large volumes, pose some of the most dangerous and expensive geological hazards in...
Rock Avalanche - an overview | ScienceDirect Topics
2013年1月21日 · A rock avalanche refers to highly mobile granular flows of fragmented rocks that originate from rockslides or rock falls, often occurring in tectonically active mountain regions with volumes ≥ 10^9 m^3 and runouts > 10 km.
Landslides And Avalanches - WorldAtlas
2023年3月21日 · Often called a sturzstrom, a rock avalanche is a massive landslide containing rock and soil, which flows for a tremendous horizontal distance compared to its original vertical drop. The mobility of the flow of a sturzstrom increases with an increase in its volume.
Rock Avalanches | Oxford Research Encyclopedia of Natural …
Rock avalanches are very large (> 1 million cubic meters) landslides from rock slopes, which can travel much farther across the landscape than smaller events; the larger the avalanche, the greater the excess travel distance.
Rock Avalanches: Basic Characteristics and Classification Criteria
2020年12月22日 · Rock avalanches represent the specific type of flow-like landslides—dry granular flows—that pose major threat to population in mountainous regions and in the adjacent plains. Being extremely mobile, they can affect areas up to dozens of square kilometers, extending sometimes for more than 10 km from the feet of the collapsing slopes.
Rock-avalanche dynamics revealed by large-scale field mapping …
On 25 May 2014, a rain-on-snow–induced rock avalanche occurred in the West Salt Creek valley on the northern flank of Grand Mesa in western Colorado (United States). The avalanche mobilized from a preexisting rock slide in the Green River Formation and traveled 4.6 km down the confined valley, killing three people.
Mountain Permafrost, Climate Change, and Rock Avalanches …
Rock avalanches are landslides of fragmented rock that begin from rock slides and can be extremely hazardous because they are large and can move long distances at extremely rapid speeds.
Reconstruction of an Avalanche: The West Salt Creek Rock Avalanche
On May 25, 2014, movement of the rock-slide slump block mobilized the rock avalanche that traveled down the West Salt Creek valley. Rock falls and rock slides from headscarp are ongoing. View is to the northwest toward the town of Collbran, Colorado.
Fragmentation and boosting of rock falls and rock avalanches
2015年7月14日 · In this work, we study another aspect of rock avalanche and rock fall fragmentation using different analytical and numerical tools. We consider an avalanche traveling along a smooth slope path followed by impact against a flat region.
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