02401oam 2200661 450 991070676050332120180110115404.0(CKB)5470000002457852(OCoLC)896810040(OCoLC)995470000002457852(EXLCZ)99547000000245785220141123d1970 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierMafic-ultramafic igneous rocks and associated carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado /by Raymond L. Parker and William N. SharpWashington :United States Department of the Interior, Geological Survey,1970.1 online resource (viii, 24 pages) map +2 platesGeological Survey professional paper ;649Title from title screen (viewed September 30, 2014)."The Gem Park Complex - its geology and mineralogy, and its niobium distribution."Includes bibliographical references (pages 23-24)NiobiumColoradoCarbonatitesColoradoCuster CountyCarbonatitesColoradoFremont CountyIgneous rocksColoradoCuster CountyIgneous rocksColoradoFremont CountyPetrologyColoradoCuster CountyPetrologyColoradoFremont CountyCarbonatitesfastIgneous rocksfastPetrologyfastColoradoCuster CountyfastColoradoFremont CountyfastNiobiumCarbonatitesCarbonatitesIgneous rocksIgneous rocksPetrologyPetrologyCarbonatites.Igneous rocks.Petrology.Parker Raymond L(Raymond Laurence),64916Sharp William N(William Neil),1922-Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910706760503321Mafic-ultramafic igneous rocks and associated carbonatites of the Gem Park Complex, Custer and Fremont Counties, Colorado3455290UNINA