LEADER 01995oam 2200553 450 001 9910706718803321 005 20180130083305.0 035 $a(CKB)5470000002458273 035 $a(OCoLC)896810209 035 $a(OCoLC)995470000002458273 035 $a(EXLCZ)995470000002458273 100 $a20141123d1973 ua 0 101 0 $aeng 135 $aurmn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aMiddle Jurassic (Bajocian) ammonites from eastern Oregon /$fby Ralph W. Imlay 210 1$aWashington :$cUnited States Department of the Interior, Geological Survey,$d1973. 215 $a1 online resource (iv, 100 pages, 47 unnumbered pages of plates) $cillustrations, maps +$e1 plate 225 1 $aGeological Survey professional paper ;$v756 300 $aTitle from title screen (viewed September 30, 2014). 300 $a"Bajocian ammonites of eastern Oregon greatly resemble those of Alaska and Europe, indicate marine connections with Europe, and permit accurate zonal dating in the Pacific Coast region." 320 $aIncludes bibliographical references (pages 92-95) and index. 517 $aMiddle Jurassic 606 $aAmmonoidea$zOregon 606 $aPaleontology$yJurassic 606 $aPaleontology$zOregon 606 $aAmmonoidea$2fast 606 $aJurassic Geologic Period$2fast 606 $aPaleontology$2fast 607 $aOregon$2fast 615 0$aAmmonoidea 615 0$aPaleontology 615 0$aPaleontology 615 7$aAmmonoidea. 615 7$aJurassic Geologic Period. 615 7$aPaleontology. 700 $aImlay$b Ralph W$g(Ralph Willard),$f1908-1989,$01390990 712 02$aGeological Survey (U.S.), 801 0$bCOP 801 1$bCOP 801 2$bOCLCO 801 2$bOCLCF 801 2$bGPO 906 $aBOOK 912 $a9910706718803321 996 $aMiddle Jurassic (Bajocian) ammonites from eastern Oregon$93505098 997 $aUNINA