01129nam a2200289 4500 20260817161200.0 us eng .b11591626 QE75 B9 no. 2132 M'Gonigle, John W. 40Ar/39Ar ages of some Challis Volcanic Group rocks and the initiation of Tertiary sedimentary basins in southwestern Montana / by ... and G. Brent Dalrymple Washington : U.S. Govt. Print. Off., 1996 17 p. : maps (in pocket) Bulletin ; no. 2132 Rocks, Igneous Montana Argon-argon dating Montana Geology, Stratigraphic Tertiary Dalrymple, G. Brent United States. Geological Survey. Bulletin ; no. 2132 .b11591626 mngc - 120917 0 970522 m a - 0 mngc 14 Barcode : 30050004019229 CREATED : 1995-12-24 RECORD # : i11943841 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 250 250 0 0 0 0 MAIN MAIN mngc 2026-08-17 0 QE75 B9 no. 2132 30050004019229 2026-08-17 16:12:00 1 2026-08-17 14