02027oam 2200517 450 991070778140332120161028135656.0(CKB)5470000002466731(OCoLC)886547014(EXLCZ)99547000000246673120140812d1973 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierSturgis Formation (Upper Pennsylvanian), a new map unit in the western Kentucky coal field /by Thomas M. Kehn ; work done in cooperation with the Kentucky Geological Survey[Washington, D.C.] :United States Department of the Interior, Geological Survey,1973.Washington :United States Government Printing Office.1 online resource (iii, 24 pages) illustrations, mapsGeological Survey bulletin ;1394-BContributions to stratigraphy"A clarification and revision of the stratigraphic terminology and a description of the rocks of Late Pennsylvanian age."Includes bibliographical references (pages 23-24).Sturgis Formation Geology, StratigraphicPennsylvanianNomenclatureGeology, StratigraphicNomenclatureGeology, StratigraphicfastPennsylvanian Geologic PeriodfastTerminology.fastGeology, StratigraphicNomenclature.Geology, StratigraphicGeology, Stratigraphic.Pennsylvanian Geologic Period.Kehn Thomas M.1387860Geological Survey (U.S.),Kentucky Geological Survey.COPCOPOCLCOOCLCFGPOBOOK9910707781403321Sturgis Formation (Upper Pennsylvanian), a new map unit in the western Kentucky coal field3488840UNINA