X-ray spectrometric major-element analyses of tephra samples from the May 18, 1980 eruption of Mt. St. Helens
Subtitle: samples collected from Washington, Idaho, and Montana
By: by Joseph E.Taggart, Jr., James S. Wahlberg, and Howard E. Taylor.
Contributors: Wahlberg, James S.; Taylor, Howard E. 1945-; Geological Survey (U.S.)
Series: Open-file report -- 80-1130.; Open-file report (Geological Survey (U.S.)) -- 80-1130.
Publisher: U.S. Dept. of the Interior, Geological Survey
Published: 1980
Place of publication: [Denver, Colo.?]
Language: eng
Format: Microform
Subjects: Volcanic ash, tuff, etc. -- Washington (State) -- Saint Helens, Mount, Region.
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1980?]. 1 microfiche ; 11 x 15 cm.

Bibliography: p. 13.