01257oam 2200409 450 991070571220332120171108112907.0(CKB)5470000002453289(OCoLC)1000616351(EXLCZ)99547000000245328920170815d2015 ua 0engurcn|||||||||txtrdacontentcrdamediacrrdacarrierJourney through time, Grand Canyon geology /National Park Service, U.S. Department of the Interior, Grand Canyon National Park[Grand Canyon, Ariz.] :National Park Service,2015.1 online resource (2 unnumbered pages) color illustrations"0915."Grand Canyon geologyGeologyArizonaGrand CanyonGeologyfastArizonaGrand CanyonfastOnline resources.GeologyGeology.Grand Canyon National Park (Agency : U.S.),GPOGPOMERUCOCLCFGPOBOOK9910705712203321Journey through time, Grand Canyon geology3289004UNINA