LEADER 01945oam 2200541 450 001 9910706279503321 005 20171005091539.0 035 $a(CKB)5470000002455639 035 $a(OCoLC)891600080 035 $a(OCoLC)995470000002455639 035 $a(EXLCZ)995470000002455639 100 $a20140929d1956 ua 0 101 0 $aeng 135 $aurmn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aGeology and petrology of the San Juan region, southwestern Colorado /$fby Esper S. Larsen, Jr., and Whitman Cross 210 1$aWashington :$cUnited States Department of the Interior, Geological Survey,$d1956. 215 $a1 online resource (xiv, 303 pages) $cillustrations, maps +$e5 plates 225 1 $aGeological Survey professional paper ;$v258 300 $aTitle from title screen (viewed September 26, 2014). 300 $a"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." 320 $aIncludes bibliographical references (pages 297-299) and index. 606 $aGeology$zColorado 606 $aPetrology$zColorado 606 $aGeology$2fast 606 $aPetrology$2fast 607 $aSan Juan Mountains (Colo. and N.M.) 607 $aColorado$2fast 607 $aUnited States$zSan Juan Mountains$2fast 615 0$aGeology 615 0$aPetrology 615 7$aGeology. 615 7$aPetrology. 700 $aLarsen$b Esper S$g(Esper Signius),$f1879-1961,$01401922 702 $aCross$b Whitman$f1854-1949, 712 02$aGeological Survey (U.S.), 801 0$bCOP 801 1$bCOP 801 2$bOCLCO 801 2$bOCLCF 801 2$bOCLCA 801 2$bGPO 906 $aBOOK 912 $a9910706279503321 996 $aGeology and petrology of the San Juan region, southwestern Colorado$93480665 997 $aUNINA