⁴⁰Ar/³⁹Ar ages of some Challis Volcanic Group rocks and the initiation of Tertiary sedimentary basins in southwestern Montana /

Bibliographic Details
Main Authors:	M'Gonigle, John W. (Author), Dalrymple, G. Brent (Author)
Format:	Government Document eBook
Language:	English
Published:	Washington : United States Government Printing Office, 1996.
Series:	U.S. Geological Survey bulletin ; 2132.
Subjects:	From 2 to 65 million years ago Argon-argon dating. Geology, Stratigraphic > Tertiary. Igneous rocks > Montana. Geology, Stratigraphic. Igneous rocks. Tertiary Geologic Period. Montana.
Online Access:	https://purl.fdlp.gov/GPO/gpo80168

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