X1014295567-00229-54868</DOCNO> CVO Website - Glicken, 1996, Rockslide-debris Avalanche of May 18, 1980, Mount St. Helens Volcano, Washington USGS/Cascades Volcano Observatory, Vancouver, Washington REPORT: Rockslide-debris Avalanche of May 18, 1980, Mount St. Helens Volcano, Washington -- Harry Glicken, 1996, Rockslide-debris Avalanche of May 18, 1980, Mount St. Helens Volcano, Washington: USGS Open-File Report 96-677 Introduction The May 18, 1980, eruption of Mount St. Helens was one of the most important geologic events of the century.
(Mount St. Helens Volcano, Washington; was; one of the most important geologic events of the century)
Mount St. Helens Volcano, Washington
was
one of the most important geologic events of the century