02449oam 2200613 450 991070565690332120170519103005.0(CKB)5470000002451827(OCoLC)891574863(OCoLC)995470000002451827(EXLCZ)99547000000245182720140929d1967 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierBig Snowy and Amsden Groups and the Mississippian-Pennsylvanian boundary in Montana /by Edwin K. Maughan and Albert E. RobertsWashington :U.S. Department of the Interior, Geological Survey,1967.Washington :United States Government Printing Office.1 online resource (iii, B27 pages) illustrations, maps +4 platesGeological Survey professional paper ;554-BShorter contributions to general geology ;[1966]Title from title screen (viewed September 24, 2014).Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/)."A study of the Upper Mississippian and Pennsylvanian sedimentary formations with special emphasis on their regional correlation, variation in lithology, and age assignments."Includes bibliographical references (pages B25-B27).GeologyMontanaGeology, StratigraphicMississippianGeology, StratigraphicPennsylvanianGeologyfastGeology, StratigraphicfastMississippian Geologic PeriodfastPennsylvanian Geologic PeriodfastMontanafastGeologyGeology, StratigraphicGeology, StratigraphicGeology.Geology, Stratigraphic.Mississippian Geologic Period.Pennsylvanian Geologic Period.Maughan Edwin K.1926-1995,1402432Roberts Albert Eugene1921-Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910705656903321Big Snowy and Amsden Groups and the Mississippian-Pennsylvanian boundary in Montana3472872UNINA