02172oam 2200553 450 991070684430332120180307073954.0(CKB)5470000002459025(OCoLC)896810426(OCoLC)995470000002459025(EXLCZ)99547000000245902520141123d1976 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierType sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana /by W.A. Cobban [and three others]Washington :United States Department of the Interior, Geological Survey,1976.1 online resource (iii, 66 pages) illustrations, mapGeological Survey professional paper ;974Title from title screen (viewed October 6, 2014)."A report of a formal subdivision and age assignments of a classic Cretaceous area."Includes bibliographical references (pages 61-63) and index.Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations Geology, StratigraphicNomenclatureGeology, StratigraphicCretaceousGeologyMontanaGeologyMontanaBlackleaf FormationCretaceous Geologic PeriodfastGeology, StratigraphicfastTerminology.fastGeology, StratigraphicGeology, StratigraphicGeologyGeologyCretaceous Geologic Period.Geology, Stratigraphic.Cobban William A.1916-2015,1390881Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910706844303321Type sections and stratigraphy of the members of the Blackleaf and Marias River Formations (Cretaceous) of the Sweetgrass arch, Montana3513922UNINA