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U.S. GEOLOGICAL SURVEY McCALLUM AREA
<br />' DRILL-HOLE LOG, JACKSON COUNTY, COLORADO
<br />Hole No. E23 Map Ea¢le Hill Date logged 9-6-77 Elevation (f t) 7980
<br />Location: T.~_N. , R._)8_W. , sec.: 200 F N L 2400F E L Cored: ~ Yes © No
<br />Drilled depth 306 Logged depth 306 Drilling medium air Fluid level~_
<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 3.2 Kcps/in Logging speed 20 fpm
<br />Remarks: Dip of strata is approximately 25o W. Twin drilled, coal cored
<br />in second hole. Water (2 GPM) between 42' and 48'.
<br />
<br />LITHOLOGY ~
<br />N o GEOPHYSICAL LOGS
<br /> ~' G SP RES DEN
<br />il
<br />0-5
<br />-
<br />ll
<br />i
<br />So
<br />, moderate
<br />ow
<br />sh-brown,
<br />ye ,~-_ ~ _ ~ ~-
<br />and gravel -
<br />~
<br />5-18 Sandstone
<br />moderate-yellowish- ~•
<br />,
<br />brown to moderate-brown ,. = -' =
<br />-'
<br />medium-grained, poorly - - _
<br /> -
<br />-
<br />consolidated
<br />
<br />18-40 Mudstone, gray, some silty, and _
<br />_
<br />-
<br />light-gray, medium-grained, sub- _ ~r~.,
<br />_
<br />rounded, poorly consolidated ,,
<br />- -~-
<br />sandstone at 21'-25'
<br />d
<br />i
<br />0-53
<br />h - -~= - ~_ ~
<br />-
<br />San
<br />stone, green
<br />s
<br />-gray, very
<br />4 _ ~ -_-
<br />
<br />coarse grained to medium- - - __ ~ _ •`'z __
<br />~-
<br />grained, subangular, poorly
<br />consolidated
<br />• _- -- ~-'~ _
<br />__
<br />- -~
<br />
<br />53-61 Mudstone
<br />silt
<br />medium-li
<br />ht- , _
<br />_ _
<br />~_
<br />y,
<br />,
<br />g
<br />gray _
<br />- --- ~ --
<br />61-83 Sandstone, light-gray, medium- _
<br />. .. - -------~ - __
<br />to coarse-grained, aubrounded,
<br />very well consolidated, inter- -_ _. _.-
<br />~'- ~__-
<br />bedded with poorly conaoli- _ ~ _ -
<br />
<br />dated sandstone
<br />83-90 Mudstone, medium-gray _ '
<br />' --- ~- -_ =.
<br />90-118 Sandstone, light-gray, medium- _
<br />grained to very fine pebble _ ~ = ~~
<br />gravel, subangular [o angular,
<br />poorly consolidated, inter-
<br />bedded with medium-gray -~- - _
<br />- z
<br />--~
<br />~
<br />mudstone - -
<br />__--~ - X --
<br />
<br />118-167 Mudstone, light-gray, interbedded
<br />with light-gray, fine- to
<br />medium-grained, aubrounded, '_
<br />--
<br />__ _ _ ,' - --
<br />~ r- _ __ ______
<br />- ;~~ _ __ _-_
<br />poorly sonsolidated sandstone
<br />167-188 Sandstone, white, medium-grained __
<br />-- _ _____~_ --.~
<br />-
<br />to very fine pebble gravel, sub - _
<br />- --_ - =
<br />--
<br />j
<br />rounded to angular, poorly - _
<br />_
<br />-_ _-= =~-
<br />-
<br />consolidated _
<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 />64
<br />
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