Geochronological data for the Pioneer Mountains, southwestern Montana
Subtitle: part I, p40sAr/p39sAr age-spectrum and conventional K/Ar dates for unaltered plutons
By: by Lawrence W. Snee and John F. Sutter ; United States Department of the Interior, Geological Survey
Contributors: Sutter, John F; Geological Survey (U.S.)
Series: Open-file report -- 82-961; Open-file report (Geological Survey (U.S.)) -- 82-961
Publisher: The Survey
Published: 1982
Place of publication: [Reston, Va.?]
Language: eng
Format: Microform
Subjects: Potassium-argon dating; Intrusions (Geology) -- Montana
Notes: Microfiche. [Denver, Colo. : U.S. Geological Survey, 1982?]. 1 microfiche ; 11 x 15 cm

Chiefly tables

Bibliography: leaf 50