000124047 000__ 03525cam\a2200325\i\4500 000124047 001__ 124047 000124047 005__ 20210513043630.0 000124047 008__ 740924s1975\\\\dcuab\\\\b\\\f001\0\engm\ 000124047 010__ $$a74020902 000124047 035__ $$a(OCoLC)ocm01056852 000124047 035__ $$a124047 000124047 040__ $$aDLC$$beng$$cDLC$$dBTCTA$$dAST$$dOCLCO$$dFMCGI 000124047 043__ $$an-us-co 000124047 049__ $$aISEA 000124047 05000 $$aQE461$$b.L626 000124047 050_4 $$aQE75$$b.P9 no.852 000124047 08200 $$a552/.2/0978838 000124047 0860_ $$aI 19.16:852 000124047 1001_ $$aLipman, Peter W. 000124047 24510 $$aEvolution of the Platoro caldera complex and related volcanic rocks, southeastern San Juan Mountains, Colorado :$$ba study of relations between ash-flow eruptions, lava-flow activity, and caldera structure at a mineralized volcanic center /$$cby Peter W. Lipman. 000124047 260__ $$aWashington :$$bU.S. Govt. Print. Off.,$$c1975. 000124047 300__ $$av, 128 p. :$$bill., maps ;$$c29 cm. 000124047 4901_ $$aGeological Survey professional paper ;$$v852 000124047 500__ $$aIncludes index. 000124047 504__ $$aBibliography: p. 120-123. 000124047 50500 $$tAbstract --$$tIntroduction --$$tPresent investigation --$$tGeologic setting --$$tPrevolcanic rocks --$$tEarly intermediate-composition rocks (Conejos Formation) --$$tVent facies --$$tVolcaniclastic facies --$$tUpper lava unit --$$tAsh-flow sheets --$$tTuff of Rock Creek --$$tTreasure Mountain Tuff --$$tLower tuff --$$tLa Jara Canyon Member --$$tMiddle tuff --$$tOjito Creek Member --$$tRa Jadero Member --$$tUpper tuff --$$tYounger ash-flow sheets and interlayered lavas --$$tMasonic Park Tuff --$$tFish Canyon Tuff --$$tCarpenter Ridge Tuff --$$tWason Park Tuff --$$tSnowshoe Mountain Tuff --$$tInterlayered lava flows --$$tSheep Mountain Andesite --$$tHuerto Andesite --$$tVolcanics of Table Mountain --$$tLavas and related rocks of the Platoro caldera complex --$$tRhyodacite of Fisher Gulch --$$tSummitville Andesite --$$tAndesite of Summit Peak --$$tVolcanics of Green Ridge --$$tRhyolite unit --$$tAndesite-rhyodacite unit --$$tPorphyritifc rhyodacite unit --$$tRhyodacite of Park Creek --$$tQuartz latite of South Mountain --$$tRhyolite of Cropsy Mountain --$$tVolcaniclastic rocks (Los Pinos Formation) --$$tIntrusive rocks --$$tGranitic intrusions --$$tAlamosa River stock --$$tCat Creek stock --$$tJasper stock --$$tBear Creek stock cluster --$$tOther stocks --$$tPorphyro-aphanitic intrusions --$$tAndesitic rocks --$$tRhyodacitic rocks --$$tQuartz latitic and rhyolitic rocks --$$tLate basalt and rhyolite (Hinsdale Formation) --$$tBasaltic lavas --$$tRhyolitic lavas and tuffs --$$tMixed lavas --$$tSurficial deposits --$$tStructural evolution --$$tPre-Tertiary structures --$$tTertiary volcanic structures --$$tSan Juan caldera cluster --$$tPlatoro caldera --$$tPremonitory volcanism --$$tAsh-flow eruptions and caldera collapse --$$tResurgent uplift --$$tPostresurgence volcanism --$$tSummitville caldera --$$tArcuate faulting --$$tTopographic wall --$$tPostcollapse volcanism --$$tCaldera-related regional faulting --$$tRio Grande fault zone --$$tPass Creek-Elwood Creek-Platoro fault system --$$tLate Cenozoic extensional faulting --$$tAlteration and mineralization --$$tSummitville district --$$tStunner and Gilmore districts --$$tPlatoro district --$$tJasper area --$$tCrater Creek area --$$tCat Creek area --$$tEconomic significance --$$tPetrologic evolution --$$tReferences cited --$$tIndex. 000124047 650_0 $$aVolcanism$$zSan Juan Mountains (Colo. and N.M.) 000124047 650_0 $$aVolcanic ash, tuff, etc.$$zSan Juan Mountains (Colo. and N.M.) 000124047 7400_ $$aEvolution of the Platoro caldera complex and related volcanic rocks ... 000124047 830_0 $$aGeological Survey professional paper ;$$v852. 000124047 85200 $$bgen$$hQE75$$i.P9$$ino.852 000124047 909CO $$ooai:library.usi.edu:124047$$pGLOBAL_SET 000124047 980__ $$aBIB 000124047 980__ $$aBOOK