02235oam 2200589 450 991070968130332120180523095128.0(CKB)5470000002471420(OCoLC)896810990(OCoLC)995470000002471420(EXLCZ)99547000000247142020141123d1980 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierAlkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado /by Jerry C. Olson and David C. HedlundWashington :United States Department of the Interior, Geological Survey,1981.1 online resource (iv, 34 pages) illustrations, mapsGeological Survey professional paper ;1049-CGeology and resources of thorium in the United StatesTitle from title screen (viewed October 14, 2014)."An evaluation of thorium resources, their distribution, and geologic relationships."Includes bibliographical references (pages 33-34).Alkalic igneous rocksIntrusions (Geology)ColoradoGunnison CountyThorium oresColoradoGunnison CountyGeologyColoradoGunnison CountyAlkalic igneous rocksfastIntrusions (Geology)fastThorium oresfastColoradoGunnison CountyfastAlkalic igneous rocks.Intrusions (Geology)Thorium oresGeologyAlkalic igneous rocks.Intrusions (Geology)Thorium ores.Olson J. C(Jerry Chipman),1917-2013,1392464Hedlund David Carl1924-Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910709681303321Alkalic rocks and resources of thorium and associated elements in the Powderhorn District, Gunnison County, Colorado3447183UNINA