Stratigraphic succession, isotopic ages, partial chemical analyses, and sources of certain silicic volcanic ash beds (4.0 to 0.1 m.y.) of the western United States
By: by Glen A. Izett
Contributors: Geological Survey (U.S.)
Series: Open-file report -- 81-763; Open-file report (Geological Survey (U.S.)) -- 81-763
Publisher: Dept. of the Interior, U.S. Geological Survey
Published: 1981
Place of publication: [Denver, Colo.?]
Language: eng
Format: Microform
Subjects: Volcanic ash, tuff, etc. -- West (U.S.)
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1981?]. 2 microfiches ; 11 x 15 cm

Bibliography: sheet 1