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Structural M.Y. Rock <br /> Event Ago Unit <br /> Fish <br /> San Luis 25 Basalts Canyon <br /> Graben Tuff <br /> 26 <br /> Alternating <br /> o tuffs <br /> o and <br /> E andesite <br /> L. flows <br /> 0 <br /> Silverton 27 Crystal Lake Tuff '�- <br /> c <br /> VI O <br /> O V1 <br /> N y <br /> >J = <br /> U La Garita Fish Canyon Tuff <br /> E Uncompahgre 28 Sapinero Mesa Tuff <br /> San Juan <br /> N <br /> 3 <br /> Latite <br /> 29 c flows <br /> 0 <br /> Eastern a Welded tuff <br /> Calderas Eastern ash—flows <br /> 0 <br /> 1n Quartz <br /> 30 - c latite <br /> M <br /> m flows <br /> and <br /> tuffs <br /> 31 <br /> Eureka <br /> Composite Intermediate Member <br /> Cones Volcanics of <br /> Sapinero <br /> Mesa Tuff <br /> San Juan County Mining Venture DATE: 10/10/91 <br /> Silverton, Colorado DRAWN: IGEK <br /> Stratigraphic Column in CHECKED: <br /> the Vicinity of Sunnyside APPROVED: <br /> DWG NO: <br /> Mine, San Juan County, Co PROJ.: 464110361 <br /> Hydro-Search, Inc. Figure 2 <br /> 1978 HYDRMOGISTS-GEDLDGISTS-ENGINEERS 9 <br /> GASAN-JUAN\ACAD\464CHW1.DVG Modified from Langston, ` Rene Denver 0woukee Irvin! <br />