02083oam 2200589 450 991071339080332120200324095256.0(CKB)5470000002499731(OCoLC)985370191(OCoLC)995470000002499731(EXLCZ)99547000000249973120170503d1984 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierGeochemistry and geohydrology of the West Decker and Big Sky coal-mining areas, southeastern Montana /by Robert E. DavisHelena, Montana :U.S. Geological Survey,1984.1 online resource (vi, 109 pages) illustrations, mapsWater-resources investigations report ;83-4225"Prepared in cooperation with the U.S. Bureau of Land Management and the Montana Bureau of Mines and Geology.""February 1984."Includes bibliographical references (pages 61-63).Coal mines and miningEnvironmental aspectsMontanaGeochemistryMontanaHydrogeologyMontanaGroundwaterMontanaCoal mines and miningfastGroundwaterfastBig Sky Mine (Mont.)MontanafastCoal mines and miningEnvironmental aspectsGeochemistryHydrogeologyGroundwaterCoal mines and mining.Groundwater.Davis Robert E(Hydrologist),309412Geological Survey (U.S.),United States.Bureau of Land Management.Montana Bureau of Mines and Geology.COPCOPOCLCOOCLCFOCLCAGPOBOOK9910713390803321Geochemistry and geohydrology of the West Decker and Big Sky coal-mining areas, southeastern Montana3446359UNINA