LEADER 02007oam 2200517 450 001 9910707795203321 005 20161021142635.0 035 $a(CKB)5470000002466592 035 $a(OCoLC)886546947 035 $a(EXLCZ)995470000002466592 100 $a20140812d1974 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aArgentian cryptomelane and bromargyrite in volcanic rocks near Silver Cliff, Colorado /$fby Fred A. Hildebrand and Elwin L. Mosier 210 1$a[Washington, D.C.] :$cUnited States Department of the Interior, Geological Survey,$d1974. 210 2$aWashington :$cUnited States Government Printing Office. 215 $a1 online resource (iii, 23 pages) $cillustrations 225 1 $aGeological Survey bulletin ;$v1382-C 225 1 $aContributions to economic geology 300 $aTitle from title screen (viewed August 4, 2014). 300 $a"This report describes silver minerals, especially a new variety of cryptomelane, and explains why unmined silver ores remain at the surface in this old mining district." 320 $aIncludes bibliographical references (page 23). 606 $aSilver ores$zColorado$zSilver Cliff 606 $aMines and mineral resources$zColorado$zSilver Cliff 606 $aMines and mineral resources$2fast 606 $aSilver ores$2fast 607 $aColorado$zSilver Cliff$2fast 615 0$aSilver ores 615 0$aMines and mineral resources 615 7$aMines and mineral resources. 615 7$aSilver ores. 700 $aHildebrand$b Fred A.$01414390 702 $aMosier$b Elwin L. 712 02$aGeological Survey (U.S.), 801 0$bCOP 801 1$bCOP 801 2$bOCLCO 801 2$bOCLCF 801 2$bGPO 906 $aBOOK 912 $a9910707795203321 996 $aArgentian cryptomelane and bromargyrite in volcanic rocks near Silver Cliff, Colorado$93513497 997 $aUNINA