Description
Item Description:Title from title screen (viewed October 31, 2014).
"Lahars and lahar-runout flows in the Toutle-Cowlitz River system, Mount St. Helens, Washington."
"Geologic evidence suggests large, destructive flows have a recurrence interval of less than 100 years."
Physical Description:1 online resource (iv, B33 pages) : illustrations, map.
Bibliography:Includes bibliographical references (pages B24-B25).