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map background search result map search result map Aerial view of southeast side of Mount Saint Helens and mudflows. Skamania County, Washington. 1980. Aerial view of edge of blast area. Mount St. Helens, Washington. 1980. Aerial view of crevasses on glacier on southeast rim of Mount Saint Helens. Skamania County, Washington. 1980. Aerial view of phreatic craters on pyroclastic flow plain between Mount Saint Helens and Spirit Lake. Skamania County, Washington. 1980. Aerial view of mudflows on southwest side of Mount Saint Helens. Skamania County, Washington. 1980. Aerial view of blast area and south end of Spirit Lake from the east. Skamania County, Washington. 1980. Aerial view of surface of Toutle River debris flow. Mount St. Helens, Skamania County, Washington. 1980. Helicopter at mouth of crater. Mount St. Helens, Skamania County, Washington. 1980. Peter D. Rowley and Norm Macheod in ramp area. Mount St. Helens, Skamania County, Washington. 1980. Pyroclastic flow deposits on plain. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kuntz on August 7 pyroclastic flow surface. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kintz  on May 18 pyroclastic flow surface. Mount St. Helens, Skamania County, Washington. 1980. Charred tree trunk in blast area, south of Spirit Lake. Mount St. Helens, Skamania County, Washington. 1980. Terminus of July 22 pyroclastic flow deposit. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kuntz on August 7 pyroclastic flow deposit levee overlying July 22 pyroclastic flow deposit. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kuntz crossing surface of Jul 22 pyroclastic flow deposit. Mount St. Helens, Skamania County, Washington. 1980. May 18 pyroclastic flow deposit (section). Mount St. Helens, Skamania County, Washington. 1980. May 18 pyroclastic flow deposit lapping onto debris flow hill. Mount St. Helens, Skamania County, Washington. 1980. Pyroclastic flow paths on north flank of Mount Saint Helens. Skamania County, Washington. 1980. Aerial view of upper reaches of Canyon of South Fork of Toutle River. Mount St. Helens, Cowlitz and Skamania Counties, Washington. 1980. Aerial view of southeast side of Mount Saint Helens and mudflows. Skamania County, Washington. 1980. Aerial view of crevasses on glacier on southeast rim of Mount Saint Helens. Skamania County, Washington. 1980. Aerial view of phreatic craters on pyroclastic flow plain between Mount Saint Helens and Spirit Lake. Skamania County, Washington. 1980. Aerial view of mudflows on southwest side of Mount Saint Helens. Skamania County, Washington. 1980. Aerial view of blast area and south end of Spirit Lake from the east. Skamania County, Washington. 1980. Aerial view of surface of Toutle River debris flow. Mount St. Helens, Skamania County, Washington. 1980. Helicopter at mouth of crater. Mount St. Helens, Skamania County, Washington. 1980. Peter D. Rowley and Norm Macheod in ramp area. Mount St. Helens, Skamania County, Washington. 1980. Pyroclastic flow deposits on plain. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kuntz on August 7 pyroclastic flow surface. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kintz  on May 18 pyroclastic flow surface. Mount St. Helens, Skamania County, Washington. 1980. Charred tree trunk in blast area, south of Spirit Lake. Mount St. Helens, Skamania County, Washington. 1980. Terminus of July 22 pyroclastic flow deposit. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kuntz on August 7 pyroclastic flow deposit levee overlying July 22 pyroclastic flow deposit. Mount St. Helens, Skamania County, Washington. 1980. Mel A. Kuntz crossing surface of Jul 22 pyroclastic flow deposit. Mount St. Helens, Skamania County, Washington. 1980. May 18 pyroclastic flow deposit (section). Mount St. Helens, Skamania County, Washington. 1980. May 18 pyroclastic flow deposit lapping onto debris flow hill. Mount St. Helens, Skamania County, Washington. 1980. Pyroclastic flow paths on north flank of Mount Saint Helens. Skamania County, Washington. 1980. Aerial view of upper reaches of Canyon of South Fork of Toutle River. Mount St. Helens, Cowlitz and Skamania Counties, Washington. 1980. Aerial view of edge of blast area. Mount St. Helens, Washington. 1980.