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U.S. GEOLOGICAL SURVEY McCALLUM AREA <br />• ~ DRILL-HOLE LOG, JACKSON COUNTY, COLORADO <br />Hole No. G21 Map Gould NW Date logged 8-28-77 Elevation (f t) 8295 <br />Location: T. 9 N., R. 79 W., sec. 14 2175 FS L 975 FE L Cored: ~ Yes ® No <br />Drilled depth 140 Logged depth 140 Drilling medium air Fluid level 120 <br />Geophysical logs: <br />Spontaneous potential (SP): Scale 25 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 />LITHOLOGY <br />0-33 Mudstone, gray <br />33-38 Sandstone, very light gray, <br /> coarse-grained to very <br /> coarse grained, subangular, <br /> poorly consolidated <br />38-54 Mudstone, light-gray and dark- <br /> yellowish-orange <br />54-62 Sandstone, grayish-grange, fine- <br /> grained, well sorted, and <br /> yellowish-gray siltstone <br />62-69 Mudstone, dark-yellowish-orange <br />69-87 Sandstone, grayish-orange, <br /> coarse-grained to very coarse <br /> grained, subangular, <br /> poorly consolidated <br />87-120 Mudstone, gray <br />120-123 Sandstone, white, very coarse <br /> grained to very fine pebble <br /> gravel, subangular <br />123-140 Mudstone, light-gray, silty <br />a <br />~. ca <br />ao <br />F .] <br />Vl <br />200 60 <br />70 <br />250 <br />80 <br />90 <br />62 <br />G ~ <br />