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

Bibliographic Details
Main Author:	M'Gonigle, John W.
Corporate Author:	Geological Survey (U.S.)
Other Authors:	Dalrymple, G. Brent
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. G.P.O. ; 1996.
Series:	U.S. Geological Survey bulletin ; 2132.
Subjects:	Igneous rocks > Montana. Argon-argon dating > Montana. Geology, Stratigraphic > Tertiary.

Evans: US Documents (Annex 5th floor)