01995oam 2200553 450 991070671880332120180130083305.0(CKB)5470000002458273(OCoLC)896810209(OCoLC)995470000002458273(EXLCZ)99547000000245827320141123d1973 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierMiddle Jurassic (Bajocian) ammonites from eastern Oregon /by Ralph W. ImlayWashington :United States Department of the Interior, Geological Survey,1973.1 online resource (iv, 100 pages, 47 unnumbered pages of plates) illustrations, maps +1 plateGeological Survey professional paper ;756Title from title screen (viewed September 30, 2014)."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."Includes bibliographical references (pages 92-95) and index.Middle Jurassic AmmonoideaOregonPaleontologyJurassicPaleontologyOregonAmmonoideafastJurassic Geologic PeriodfastPaleontologyfastOregonfastAmmonoideaPaleontologyPaleontologyAmmonoidea.Jurassic Geologic Period.Paleontology.Imlay Ralph W(Ralph Willard),1908-1989,1390990Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910706718803321Middle Jurassic (Bajocian) ammonites from eastern Oregon3505098UNINA