  |
|
| This view upstream from the site of the Muddy River bridge shows the large size of boulders carried by the lahar about 21 km from the volcano. The extremely high proportion of rock debris to water in lahars, often more than 70 to 80 percent sediment by weight, enables these boulders to "float" in the moving mixture of water and rock. The lahar traveled down this stretch of the Muddy River from one side of the valley to the other, and during its peak flow was well above the cars in the distance (see large version of the photograph). |
| Home |
Photoglossary |
Volcano observatories |
Site index |
Educator's page |
| Current U.S. activity |
Highlights |
Contact us |
URL of this document:
http://volcanoes.usgs.gov/Hazards/Effects/MuddyBridge2_caption.html
Last modified: October 19, 1998
