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U.S. GEOLOGICAL SURVEY McCALLUM AREA <br />DRILL-HOLE LOG, JACKSON COUNTY, COLORADO <br />Hole No. E17A Map Eagle Hill Date logged 8-31-77 Elevation (f t) 8170 <br />Location: T. 9 N. , R. 79 W. , sec. 1 2325 F N L 1050 F W L Cored: ~ Yes ® No <br />Drilled depth 461 Logged depth 461 Drilling medium Air Fluid level 99 <br />Geophysical logs: <br />Spontaneous potential (SP): Scale 100 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 3.2 Kcps/in Logging speed 20 fpm <br />Remarks: <br /> <br />LITHOLOGY ~ <br />F o GEOPHYSICAL LOGS <br /> `~ G SP RES DEN <br /> <br />0-64 Sandstone, moderate-brown, and ___ - <br />_- <br />grayish-brown clays[one _ <br />_ <br />i -- <br />i <br /> <br />64-71 Mudstone, brownish-gray , <br />5~ - _ <br />71-100 Sandstone, dark-yellowish-orange -- _-- <br />, <br />medium-grained to very fine :• <br />pebble gravel, subangular, _ _ - <br />poorly sorted, poorly - - <br />consolidated '~" - _ <br /> <br />100-124 Siltstone, medium-gray _ <br />~ _ <br />124-128 Sandstone, very light gray, - ~ - _ <br />medium-grained to coarse- <br /> <br />grained, subangular, well- __ _ <br />sorted, poorly consolidated - <br />128-140 Mudstone, medium-gray ~. _ ~f- <br />140-167 Sandstone, grayish-orange, very _ ~ ~ __ <br />coarse grained to very fine - _ - _ <br />- <br />pebble gravel, angular, poorly __ _ <br />__ __ ~ -- <br />consolidated - <br />-- <br />167-188 Sandstone, as above, and medium- <br />gray mudstone, interbedded -- <br />__ _ <br />=__ ___ `~ -= <br />- -23r <br /> <br />188-209 Siltstone, medium-gray, inter- .. - <br />_ <br />bedded with light-gray mudstone ••••• ~ <br />- =- -- <br />209-253 Sandstone, grayish-orange, very - _ -- ___ ~~ <br />coarse grained to very fine - -- . -_ ~__ <br />pebble gravel, angular, poorly - = - - - -; <br />lid <br />d <br />i <br />t <br />b <br />dd <br />d <br />ith <br />t <br />conso <br />a <br />, <br />n <br />er <br />w <br />e <br />e <br />e -- <br />T_:~. <br />Siltstone and mudstone - <br />- -- ~ -_:- <br />253-300 Mudstone, brownish-gray, inter- _ <br />bedded with medium-gray muddy - _ <br />Siltstone - <br /> <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 />300 90 <br />50 <br />