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U.S. GEOLOGICAL SURVEY McCALLUM AREA <br />• DRILL-HOLE LOG, JACKSON COUNTY, COLORADO <br />Hole No. GSA Map Gould NW Date logged 8-23-77 Elevation (f t) 8410 <br />Location: T. 8 N., R. 78 W „ sec. 3 : 100 FS L 1500F WL Cored: ~ Yes ~ No <br />Drilled depth 300 Logged depth 300 Drilling medium Air Fluid level 78 <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 3.2 Ecps/in Logging speed 20 fpm <br />Remarks: <br /> <br />LITHOLOGY H ~ <br />F ° GEOPHYSICAL LOGS <br /> a <br />~' <br />G <br />SP RES <br />DEN <br /> <br />0-18 Soil, sandy, pale-yellovieh-~ <br />brown, and gravel <br />_ _ ___ - __ ~ __ <br />- - - <br /> <br />18-30 Mudstone, light-gray - _ I - _ - _- <br />30-41 Sandstone, very pale orange, very ___.. = __= <br />fi <br />i <br />d - _ <br />-.. - <br />= <br />- <br />_ <br />~ <br />_ <br />ne gra <br />ne <br />~ <br />=- . <br />- <br />__- <br />, __ <br />-_ <br />= <br /> - <br />~ <br />41-58 Sandstone ra iah-oran e <br />8 Y 8 ~ - - -_ - - _~ - '-_~~ = ~__ <br />- _ _~ <br />-_- _ <br />; E-:: -: - <br />coarse- to fine-grained - _ <br />__ <br />58-70 Siltstone, very light gray <br />70-125 Mudstone, medium-light-gray - - - -- -= <br />- -.- _ <br /> ~ <br />125-200 Sandstone, medium-light-gray, -- <br />-- - _ <br />- - -- _ <br />fine-grained, well- -_ <br />-_ ~_ <br />-' - - <br /> _ _ <br />_ <br />_ <br />= <br />consolidated; interbedded <br />medium-light-gray mudstone <br /> <br />...... _ __ <br />_ i_ ~ ;=-_ <br />- -- <br />- - <br />_ <br /> ,-_~-_ <br />-= -~^= . <br />200-300 Sandstone, light-gray, fine- <br />grained, well-sorted, poorly - -__ _ <br />~-,~s, <br />- _-. _ _~-~' _' <br />consolidated -- <br />-. - <br />_- _ <br />--- - _. <br />- <br /> <br /> <br /> <br />_ - _ - <br />- ~ ' = -= <br /> <br />--~- <br />-. -. ~` <br />- - <br />_ -_ ~ <br />_ . _: <br />- <br /> _ <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 />24 <br />