Filters: Tags: Cascades Volcano Observatory Collection (X) > partyWithName: Glicken, Harry (X)

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View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. Mount St. Helens, Cowlitz County, Washington. 1980. Index card: View of the mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. This mudflow took nine hours to build in size sufficient to reach through the blasted material and move downstream to the Cowlitz River valley. The mudflow on the South Fork Toutle River arrived at Castle Rock three hours after the eruption of Mount St. Helens and that from the North Fork by 12 hours. Cowlitz County, Washington. May 18, 1980. (Photo by Harry Glicken, USGS/CVO). Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: CVO-A Cascades Volcano Observatory Collection, Cascades Volcano Observatory Collection, Cowlitz County, Washington, Glicken, H. Collection, Mount St. Helens Collection, All tags... Mount St. Helens May 18, 1980, Photographers, Volcanoes, color transparency (slides), Fewer tags