01945oam 2200541 450 991070627950332120171005091539.0(CKB)5470000002455639(OCoLC)891600080(OCoLC)995470000002455639(EXLCZ)99547000000245563920140929d1956 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierGeology and petrology of the San Juan region, southwestern Colorado /by Esper S. Larsen, Jr., and Whitman CrossWashington :United States Department of the Interior, Geological Survey,1956.1 online resource (xiv, 303 pages) illustrations, maps +5 platesGeological Survey professional paper ;258Title from title screen (viewed September 26, 2014)."A comprehensive geologic and petrologic study of the occurrence and origin of the rocks in an area of 12,000 square miles in southwestern Colorado."Includes bibliographical references (pages 297-299) and index.GeologyColoradoPetrologyColoradoGeologyfastPetrologyfastSan Juan Mountains (Colo. and N.M.)ColoradofastUnited StatesSan Juan MountainsfastGeologyPetrologyGeology.Petrology.Larsen Esper S(Esper Signius),1879-1961,1401922Cross Whitman1854-1949,Geological Survey (U.S.),COPCOPOCLCOOCLCFOCLCAGPOBOOK9910706279503321Geology and petrology of the San Juan region, southwestern Colorado3480665UNINA