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I <br />UNITED STATES DEPARTMENT OF THE INTERIOR BULLETIN 1208 <br />GEOLOGICAL SURVEY PLATE 3 <br /> EXPLANATION <br /> <br />[T,] <br /> <br />«l _ d <br /> <br />u <br />Z <br />Q <br /> Unidentified porphyry Biotite-muscovite granite z ' Microcline gneiss m <br /> 1 - Q <br />N rb a m w S <br />10.000' <br />a <br />10,000' <br /> Bostonite porphyry w Granite gneiss and pegmatite •h Biotite gneiss j <br /> F o W O <br />FORGE HILL NO 2 VEIN <br /> <br />AIRMONT VE/N <br />9500' \ <br /> <br />Tqm <br /> <br />o a <br />.? n <br />t a s <br />y <br />\ ` ROSCOEVEIN 9500 <br />BELMA <br />VEIN N <br />Quartz monzonite porphyry <br />J <br />( <br />Amphibolite _ -------- <br />Approximate contact - <br /> <br /> <br />LAKE <br />9 <br />000' VEIN <br /> <br />SHAFTER VEIN <br /> <br />__ ______ <br />`Cm <br /> <br />___ <br /> <br />9000' <br /> FA NN <br />KENTUCK 1•IUDSONr VEIN <br />VEIN <br />Tqm / <br />Tb <br />Dushed Iultere i?d'err•ed <br />VEIN <br />/ <br />/ rTrace of drill / Lower Lake <br /> <br />qm <br />rojec- tunnel <br />8500'- j hole <br /> <br />? <br /> <br />r <br />G <br />?/ REAT AMERICAN <br />r?/ <br />v IN <br />! PROTECTIO <br />gg <br /> <br /> <br /> <br /> <br />VEIN <br /> <br /> <br />' <br />p <br />/ tion (hole is / <br />I / <br />/ ! <br />/ I / <br />l Q? //f BRYAN EDGAR VEIN <br />y <br />VEIN <br />/ r'/•t -/ 8500 <br />/ <br />t east of/ / <br />25 / <br />% f FUL TON <br />/ section) <br />: <br />Barren fault <br />Tqm <br />\? \r J/ ??J J??///?/ T 1 !! <br /> <br /> <br />/ Tb <br /> <br /> <br />? r / b <br />/ / /-r ? Barren fault t 1 / r r r? 8000' <br />r Raise. i /? / ?, J r / f/ // ?// r I T r Ar <br />grade _ ?/ ??? r ??i? ?,? /? r ? \. ? ? i // / J ?' / / ?/ / / r?/ r ? ?'> / /?. ? ?i ? Masonry <br />7600' <br />Tq EDITH VEIN POKaI <br />Geology by R. H. Moench <br />GEOLOGIC SECTION ALONG THE BIG FIVE TUNNEL, IDAHO SPRINGS DISTRICT, COLORADO <br />500 0 2000 FEET <br />i ? I f ? I <br />DATUM IS MEAN SEA LEVEL 783-337 0 - 65 (in pocket)