02077oam 2200565I 450 991070621770332120171101080432.0(CKB)5470000002456264(OCoLC)691082242(OCoLC)891600251(OCoLC)995470000002456264(EXLCZ)99547000000245626420101209d1956 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierAdditions to the flora of the Spotted Ridge Formation in central Oregon /by Sergius H. Mamay and Charles B. ReadWashington :United States Department of the Interior, Geological Survey,1956.1 online resource (22 unnumbered pages, 4 unnumbered pages of plates) illustrationsGeological Survey professional paper ;274-IShorter contribution to general geology"The U.S. Geological Survey' s previously undescribed collection of fossil plants from the Spotted Ridge formation is fully described and illustrated, including three new species."Includes bibliographical references (pages 223-224) and index.PaleobotanyOregon, CentralPaleobotanyPennsylvanianFormations (Geology)Oregon, CentralPaleobotanyfastPennsylvanian Geologic PeriodfastOregon, CentralfastPaleobotanyPaleobotanyFormations (Geology)Paleobotany.Pennsylvanian Geologic Period.Mamay Sergius H.1920-1386004Read C. B.Geological Survey (U.S.),OCLCEOCLCEOCLCQOCLCOOCLCFCOPOCLCQGPOBOOK9910706217703321Additions to the flora of the Spotted Ridge Formation in central Oregon3454906UNINA