At the time of his death, Glicken had been seeking to publish his doctoral dissertation in one piece, having earlier published elements as shorter articles. He had already defined the criteria for debris avalanches on the slopes of volcanoes, and authored several publications on the subject; Swanson named him one of the foremost experts in the field. After the 1980 eruption of Mount St. Helens, research in the niche area grew as more studies identified debris at well-known volcanoes. His work on flows at Mount St. Helens is considered the most complete in the field to date. It was later published in 1996 as a single report by his acquaintances Carol Ostengren, John Costa, Dan Dzurisin, and Jon Major, among others, at the United States Geological Survey. In his preface to Glicken's publication, Major comments that the Mount St. Helens deposit will never be mapped in such detail again.