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U.S. GEOLOGICAL SURVEY McCALLUM AREA <br />DRILL-HOLE LOG, JACKSON COUNTY, COLORADO <br />Hole No. G11A Map Gould NW Date logged 8-26-77 Elevation (f t) 8,290 <br />Location: T. 9 N., R. 78 W., sec. 22 1775 FN L 1950FE L Cored: ~ Yes ©No <br />Drilled depth 200 Logged depth 200 Drilling medium Air Fluid level 50 <br />Geophysical logs: <br />Spontaneous potential (SP): Scale 50 my/in Logging speed 20 fpm <br />Resistivity (RES): Scale 500 ohms/in Logging speed 20 fpm <br />Gamma (G): T.C. 4 Scale 200 cps/in Logging speed 20 fpm <br />Density (DEN): T.C. 4 Scale 6.4 Kcps/in Logging speed 20 fpm <br />Remarks: <br /> <br />LITHO <br />O <br />Y ~ ~ <br />F a GEOPHYSICAL LOGS <br />L <br />C `~ C SP RES DEN <br /> <br /> <br />0-46 Sand, grayish-orange to very • ~ --=_- <br />- ~ti--i <br /> <br />light-gray, coarse-grained to <br />very coarse grained, and gravel <br />~• <br />.... _ <br />~ _ ___ ~~ _= <br />. -= ~ -- <br />46-61 Mudatone -_- _ -- <br />', - _ -- <br />61-88 Sandstone, light-gray, coarse- _ <br />- <br />_ <br />_- <br />~ E---= <br />_== <br />grained to very coarse grained, ~' _ <br />_ <br />_ <br />_ <br />- <br />-__ _ - -__ ~-_ = <br />and gravel _ <br />~ _-. _ _--_ -_- <br /> <br />BS-117 Mudatone, light-gray; interbedded __ _- =__ ~ --_ _- <br />vary light gray siltstone -_- -_- -- - - <br /> =_ ~--_ _ <br />117-175 Sandstone, very light gray, very - - - ~- <br /> <br />coarse grained to medium- __ <br />-_ _ <br />grained _ -_ <br />175-200 Mudstone, medium-light-gray; __ <br />interbedded <br />light-gray _- <br />, <br />siltstone <br />DEPTH <br />FT M <br />10 <br />50 <br />20 <br />100 30 <br />40 <br />150 <br />50 <br />200 60 <br />70 <br />250 <br />80 <br />90 <br />300 <br />39 <br />