Difference between revisions of "Debris avalanche"

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[[Image:Debris_avalanche.jpg|thumb|300px|A debris avalanche rushes down the side of a volcano to the valley floor. Many such debris avalanches transform into lahars and travel tens of kilometers from the volcano. Note horseshoe shaped crater on volcano's side, which is the scar created by the avalanche.]]'''Debris avalanches''' are moving masses of rock, soil and snow that occur when the flank of a mountain or volcano collapses and slides downslope. As the moving debris rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way. Debris avalanches may travel several kilometers before coming to rest, or they may transform into more water-rich [[lahars]], which travel many tens of kilometers downstream.
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[[Image:Debris_avalanche.jpg|thumb|300px|A debris avalanche rushes down the side of a volcano to the valley floor. Many such debris avalanches transform into lahars and travel tens of kilometers from the volcano. Note horseshoe shaped crater on volcano's side, which is the scar created by the avalanche.]]'''Debris avalanches''' are moving masses of rock, soil and snow that occur when the flank of a mountain or volcano collapses and slides downslope. As the moving debris rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way. When inclusive of water in greater than 50%, the avalanche is called a mudslide. Debris avalanches may travel several kilometers before coming to rest, or they may transform into more water-rich [[lahars]], which travel many tens of kilometers downstream.
  
 
== Sources ==
 
== Sources ==

Revision as of 03:55, August 31, 2007

A debris avalanche rushes down the side of a volcano to the valley floor. Many such debris avalanches transform into lahars and travel tens of kilometers from the volcano. Note horseshoe shaped crater on volcano's side, which is the scar created by the avalanche.
Debris avalanches are moving masses of rock, soil and snow that occur when the flank of a mountain or volcano collapses and slides downslope. As the moving debris rushes down a volcano and into river valleys, it incorporates water, snow, trees, bridges, buildings, and anything else in the way. When inclusive of water in greater than 50%, the avalanche is called a mudslide. Debris avalanches may travel several kilometers before coming to rest, or they may transform into more water-rich lahars, which travel many tens of kilometers downstream.

Sources

USGS Photo Glossary