LEADER 02152oam  2200577   450 
001 9910705408803321
005 20170427072705.0
035   $a(CKB)5470000002451303
035   $a(OCoLC)889723472
035   $a(EXLCZ)995470000002451303
100   $a20140901d1996      ua             0
101 0 $aeng
135   $aurn||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$a??Ar/³?Ar ages of some Challis Volcanic Group rocks and the initiation of Tertiary sedimentary basins in southwestern Montana /$fby John W. M'Gonigle and G. Brent Dalrymple
210  1$aWashington :$cUnited States Government Printing Office,$d1996.
215   $a1 online resource (iii, 17 pages) $cillustrations, maps
225 1 $aU.S. Geological Survey bulletin ;$v2132
300   $aTitle from title screen (viewed August 28, 2014).
300   $aAlso available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
300   $a"A summary of ??Ar/³?Ar age analyses of eighteen samples of volcanic rocks from the Challis Volcanic Group and a summary of basin stratigraphy in southwestern Montana."
320   $aIncludes bibliographical references (pages 6-7).
606   $aArgon-argon dating
606   $aGeology, Stratigraphic$yTertiary
606   $aIgneous rocks$zMontana
606   $aArgon-argon dating$2fast
606   $aGeology, Stratigraphic$2fast
606   $aIgneous rocks$2fast
606   $aTertiary Geologic Period$2fast
607   $aMontana$2fast
615  0$aArgon-argon dating.
615  0$aGeology, Stratigraphic
615  0$aIgneous rocks
615  7$aArgon-argon dating.
615  7$aGeology, Stratigraphic.
615  7$aIgneous rocks.
615  7$aTertiary Geologic Period.
700   $aM'Gonigle$b John W.$01393061
702   $aDalrymple$b G. Brent
712 02$aGeological Survey (U.S.),
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
801  2$bOCLCF
801  2$bGPO
906   $aBOOK
912   $a9910705408803321
996   $a??Ar$93448694
997   $aUNINA