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A <br />15,000 FEET J <br />SEA LEVEL <br />0 S MILES <br />I 1 , 1 I 1 <br />0, , , , 4 xM <br />Bone In of <br />EXPLANATION <br />Intrusive rocks <br />El <br />Volcanic rocks <br />ME <br />Sedimentary rocks <br />Precambrian rocks <br />Fault, dashed where <br />approximately located <br />Vein or dike <br />—�NN-/'l <br />COLORADO <br />L ' <br />MWi% MAI <br />15,000 FEET <br />DIAGRAMMATIC SECTION, VEINS AND SMALL DIKES OMITTED . <br />LEVEL <br />Figure 6. Sketch map showing the major structural features surrounding the <br />Silverton caldera (modified from Varnes, 1963). <br />Revenue Mine August 2012 i -9 <br />