01856oam 2200541 450 991070629390332120171016113447.0(CKB)5470000002455494(OCoLC)891598797(OCoLC)995470000002455494(EXLCZ)99547000000245549420140929d1950 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierCretaceous plants from southwestern Colorado /by Roland W. BrownWashington :United States Department of the Interior, Geological Survey,1950.1 online resource (27 unnumbered pages) illustrationsGeological Survey professional paper ;221-DShorter contributions to general geology ;1949Includes plates.Title from title screen (viewed September 29, 2014)."A study of fossil plants useful in determining the probable boundary between the Lower and Upper Cretaceous deposits."Includes bibliographical references (pages 52-53) and index.PaleobotanyCretaceousPaleobotanyColoradoCretaceous Geologic PeriodfastPaleobotanyfastColoradofastPaleobotanyPaleobotanyCretaceous Geologic Period.Paleobotany.Brown Roland W(Roland Wilbur),1893-1961,1389891Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCQOCLCAGPOBOOK9910706293903321Cretaceous plants from southwestern Colorado3497572UNINA