01971oam 2200529 450 991070722610332120160624150538.0(CKB)5470000002463250(OCoLC)891382724(EXLCZ)99547000000246325020140926d1969 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierGold investigations in Precambrian clastic and pelitic rocks, southwestern Colorado and northern New Mexico /by Fred Barker[Washington, D.C.] :United States Department of the Interior, Geological Survey,1969.Washington :United States Government Printing Office.1 online resource (iii, 22 pages) illustrationsGeological Survey bulletin ;1272-FContributions to economic geologyTitle from title screen (viewed September 15, 2014).Includes bibliographical references (pages 21-22).Gold investigations, Precambrian rocksGold oresGeologyColoradoNeedle MountainsGeologyColoradoNeedle MountainsGold oresGeologyNew MexicoTusas RidgeGeologyNew MexicoTusas RidgeGold oresGeologyNew MexicoPicuris MountainsGeologyNew MexicoPicuris MountainsGold oresGeologyGeologyGold oresGeologyGeologyGold oresGeologyGeologyBarker Fred1928-1398492Geological Survey (U.S.),COPCOPOCLCOGPOBOOK9910707226103321Gold investigations in Precambrian clastic and pelitic rocks, southwestern Colorado and northern New Mexico3461858UNINA