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0 5 MILES <br />I i <br />RAO <br />stow in ptliss <br />15,000 FEET <br />EXPLANATION <br />Intrusive rocks <br />F71 <br />Volcanic rocks <br />Im <br />Sedimentary rocks <br />Precambrian rocks <br />Fault, dashed whore <br />approximately located <br />Vein or dike <br />ce►�sa�a 1 <br />(� ee ""a_ r_I <br />M1o[M MAI <br />15,000 FEET <br />l: list <br />SEA LEVEL ; ''' SEA LEVEL <br />DIAGRAMMATIC SECTION, VEINS AND SMALL DIKES OMITTED . <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 />