DETAILED RECORDS. 193 
COLORADO. 
184. Well near Florence, Fremont County. 
[Well begun July 31, 1905; completed October 16, 1905. Authority, R. G. Brown and T. S. Harrison, 
owners. No samples. Geologic correlations by N. H. Darton.] 
This well is in an artesian area in an embaynient into the Rocky Mountain Front Range. 
The formations penetrated are of Cretaceous age. The light-blue clay from 18 to 210 feet 
is the Pierre clay and shale; the light limestone from 210 to 250 feet is part of the Niobrara; 
the light limestone at 780 to 810 feet is the Timpas; and the light sand from 810 to 825 feet 
is the top of the Carlile formation. 
Record of Brown and Harrison well No. 1, in the SW. \ sec. 26, T. 18, R. 69. 
Feet. 
Reddish sandy loam 0- 13 
Reddish conglomerate 13- 18 
Light-blue clay 18- 210 
Light limestone 210- 250 
Light sand 250- 255 
' Alternating strata of shale and limestone 255- 780 
I Light limestone 780- 810 
Light sand 810- 825 
i Alternating strata of shale and limestone 825-1 , 025 
Drab shale 1, 025-1, 195 
i Sand and limestone, locally called " Dakota cap rock " 1, 195-1, 210 
Light, almost white Dakota sandstone 1, 210-1, 230 
Rig used, standard cable. Casing used, 1,048 feet of 5|-inch. Water-bearing strata 
penetrated at 230 to 235, 300 to 345, and 815 to 900 feet. Main supply from 1,210 to 1 ,230 
feet. Static head of main supply, + 80 feet. Flow, 360 gallons per minute. Temperature 
at well mouth, 87° F. Quality, hard, alkaline. 
193. Well 8 miles southeast of Swallows, Pueblo County. 
[Authority, W. H. Spruance, jr. No samples. Geologic correlations by N. II. Darton.] 
The rock formations penetrated by this well are of Cretaceous age. The Timpas lime- 
I stone is between 9 and 45 feet, the top of the Carlile formation at 45 to 75 feet, the Benton 
, shale at 75 to 500 feet; and the Dakota was struck at 535 feet. 
Record of well in the SW . \ sec. 5, T. 21, R. 66. 
Feet. 
: Earth. 0- 6 
Light-gray shale 6- 9 
Limestone with partings of shale 1 to 3 inches thick 9-45 
' Sandstone. 45- 75 
! Black and gray shale; water-bearing; surface flow of 8 to 10 gallons per minute at 
265 feet 75-500 
;: Soft shale and clay with a hard sandstone bowlder 500-505 
Shales streaked with clay 505-535 
Sandstone; water-bearing 535-553 
' Shale 553-573 
Fine sandstone; flow of water from sandstones below 535 feet was, at 580 feet, 10 
gallons per minute 573-618 
Shale and clay '. 618-665 
Firm, hard limestone : 665-672 
Rather porous sandstone; flow at 680 feet 18 gallons per minute and at 700 feet 
30 gallons per minute . , .... , ........ r ...... ,,„.... 672-715 
Bull 298—06 13 
/ 
