Photo Information

Edge of the lahar from Casita Volcano, Nicaragua
Photograph by K.M. Scott on March 24, 1999

The lateral margin of the lahar deposit about 2.5 km from the base of Casita Volcano consists of a levee about 10-15 cm high. The levee deposit is composed of pebbles in a muddy matrix. The characteristics of the deposit indicate that the lahar at this site was moving as a debris flow. After the landslide had transformed into a hyperconcented flow (40-80% sediment by weight) at the base of Casita, the lahar eroded additional sediment to transform into a debris flow (>80% sediment by weight).

 

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U.S. Department of the Interior, U.S. Geological Survey, Menlo Park, California, USA
URL http://volcanoes.usgs.gov/Imgs/Jpg/Casita/30710609-24_caption.html
Contact: VHP WWW Team
Last modification: 13 November 1999 (SRB)