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Mud / Waterflows around Mount
Rainier
*Mudflow and muddy outburst floods are descriptive terms used here in place of technical terms such as cohesive debris flows used in the original report. These data cover a range of flows consisting of differing proportions of mud and water. Mudflows are like huge rivers of mud. These flows always leave deposits of mud that later dry to rich soil. Muddy outburst floods are more like floods of muddy water. These flows may be erosive or may leave deposits. Small muddy flows and glacial outbursts of mostly water are not listed because they are difficult to detect from river deposits. Lahar refers to the whole range of muddy flows. Lahar runout refers to muddy water flowing out of a mudflow that has stopped.
These data are adapted from U.S. Geological Survey Open-File Report 90-385.
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