APA Citation

M'Gonigle, J W. (1996). 40 Ar/39 Ar ages of some Challis Volcanic Group rocks and the initiation of Tertiary sedimentary basins in southwestern Montana: A summary of 40 Ar/39 Ar age analyses of eighteen samples of volcanic rocks from the Challis Volcanic Group and a summary of basin stratigraphy in southwestern Montana. Washington: United States Government Printing Office.

ISBD Citation

40 Ar/39 Ar ages of some Challis Volcanic Group rocks and the initiation of Tertiary sedimentary basins in southwestern Montana : A summary of 40 Ar/39 Ar age analyses of eighteen samples of volcanic rocks from the Challis Volcanic Group and a summary of basin stratigraphy in southwestern Montana / by John W. M'Gonigle and G. Brent Dalrymple . — Washington : United States Government Printing Office, 1996. — III, 17 Seiten; 1 gefaltete Karte. — (U.S. Geological Survey bulletin ; 2132)

MLA Citation

M'Gonigle, John W. 40 Ar/39 Ar Ages of Some Challis Volcanic Group Rocks and the Initiation of Tertiary Sedimentary Basins in Southwestern Montana: A Summary of 40 Ar/39 Ar Age Analyses of Eighteen Samples of Volcanic Rocks From the Challis Volcanic Group and a Summary of Basin Stratigraphy in Southwestern Montana.Washington: United States Government Printing Office, 1996.

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