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U.S. GEOLOGICAL SURVEY McCALLUM AREA <br />DRILL-HOLE LOG, JACKSON COUNTY, COLORADO <br />Hole No.~_ Map Gould NW Date logged g-26-77 Elevation (f t) 8,215 <br />Location: T._~_N. , R.-~8_W. , sec._IcL: ~_F~L 600 F~L Cored: ~ Yes ©No <br />Drilled depth 160 Logged depth 160 Drilling medium air Fluid level 21 <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 100 cps/in Logging speed 20 fpm <br />Density (DEN): T.C. 4 Scale 16 cps/in Logging speed 20 .fpm <br />Remarks: Dip of strata is approximately 29o SW. <br />LITHOLOGY 04 <br />F <br />y <br />I~ <br />0-3 Sand <br />dark-yellowish-orange, <br />, <br />medium-grained '_; <br />3-18 Mudstone <br />ra <br />li <br />ht- <br />and - <br />, <br />g <br />g <br />y <br />brownish-black <br />18-76 Sandstone, light-gray, coarse- <br />grained, poorly consolidated .~• <br />some is medium- to fine- <br />r <br />ined <br />w <br />ll-consolid <br />ted <br />g <br />, <br />a <br />e <br />a <br />76-89 Mudstone, light-gray __ <br />89-140 Coal <br />140-144 Mudstone, brownish-black <br />144-160 Sandstone, light-gray, medium- -- <br />to fine-grained, well-con- _ <br />solidated, and light-gray <br />muds[one <br />RES DEN FT M <br />I <br />-- 10 <br /> <br />20 <br />-- 100 30 <br />i - <br />- 40 <br />1150 <br />i.. <br />50 <br />200 60 <br />70 <br />250 <br />80 <br />~~ <br />300 <br />GEOPHYSICAL LOGS I DEPTH <br />36 <br />G 1 SP <br />