Late Bajocian ammonites from southern Alaska Imlay, Ralph W. (Ralph Willard) 1908-1989 creator author. Geological Survey (U.S.) issuing body. text bibliography dcu 1982 monographic eng remote 1 online resource (iii, 19 pages) : illustrations, maps. by Ralph W. Imlay. Title from title screen (viewed October 9, 2014). "In Alaska, upper Bajocian beds have been found only in the south. They have been dated by ammonites as early late Bajocian. Apparently, southern Alaska was not connected with the rest of Alaska during late Bajocian times." Includes bibliographical references (pages 18-19) and index. n-us-ak Ammonoidea Paleontology Jurassic Paleontology Alaska Ammonoidea Jurassic Geologic Period Paleontology Alaska From 140 to 190 million years ago fast I 19.16:1189 I 19.16:1189 Late Bajocian ammonites from southern Alaska Imlay, Ralph W. (Ralph Willard), 1908-1989. (DLC) 80607116 (OCoLC)6306044 Geological Survey professional paper ; 1189 https://purl.fdlp.gov/GPO/gpo91051 COP 141123 20181023093618.0 in00004041979 eng