Mount St. Helens volcanic-ash fall in the Bull Run watershed, Oregon, March-June 1980
By: by Michael V. Shulters and Daphne G. Clifton.
Contributors: Clifton, Daphne G.; Geological Survey (U.S.)
Series: Geological Survey circular -- 850-A.
Publisher: U.S. Dept. of the Interior, Geological Survey; Free on application to Branch of Distribution, U.S. Geological Survey
Published: 1980
Place of publication: [Reston, Va.?]; Alexandria, Va. (604 South Pickett Street, Alexandria, Va. 22304)
Language: eng
Number of pages: 15
Subjects: Volcanic ash, tuff, etc. -- Oregon.; Saint Helens, Mount (Wash.) -- Eruptions, 1980.; Bull Run River Watershed (Or.)
Notes: Bibliography: p. A15.