94 RECORD OF DEEP WELL DRILLING FOR 1904. [bull. 264. 
Feet. 
Hard reddish-brown sand; Third sand. This stratum overlies the oil 
stratum 733-740 
Hard light-gray sandstone; oil and pis 740-750 
I lard white sandstone; salt water in small quantity 750-775 
Soft light-gray sandstone; Second pay or Newton sand 775-785 
Hard black shale 785-817 
This well compares favorably with many others drilled on this good stretch of 
territory. Thickness of the Third Sand varies from 45 to 60 feet, Wells are pro- 
ducing from 15 to 20 barrels a month that were drilled thirty-three years ago and 
have been pumped steadily ever since. This lease is known as the "Dunderdale" 
lease. It includes the Dunderdale farm, Adams, Grandon, and Reno land. A well 
designated in Carl's Geology as the "Atlas" well was drilled within half a mile of 
this property in 1865 ( 1867?). No paying wells have been found near the "Atlas," 
which produced 15 barrels a day; 1,800 in all. 
Diameter of well, 5| indies from to 308 feet; length of casing, 308 feet. 
257. Well No. ' <>n tin M. Cartwright farm, Xeir/>>n Pool, 2\ miles northeast of Grand 
Valley, in Eldred Township, Warren County, Pa. 
< iompleted September 7. L894. Authority, Josiah <i. Winger, contractor.] 
Feet. 
( 'lay subsoil; conductor hole 1(5 inches in diameter 0- 12 
Shale and sandstone; end of 8-inch hole and end of casing. This section 
includes tirst bed of shale, fresh- water sand, second bed of shale, and 
salt-water sand. The last sand in the 8-inch hole is the Second sand 
"gravel bed." The gravel bed is 10 feet thick and contains oil and salt 
water 12-275 
Soft black shale; a shell 80 or 00 feel above the Third sand is scarcely 
perceptible in this field, hut farther southwest is 20 feet thick and oil- 
bearing 275-404 
Hard coarse white sandstone; Third sand. This sandstone is flooded with 
sweet water, which rose 300 feet in the well 404-430 
Hard black shale, separating sweet from salt water strata 430-433 
Hard pebbly white sandstone; salt water in large quantities 433-447 
Medium hard gray pebbly sandstone -"Gas sand" 447-440 
Soft light gray, coarse-grained sandstone; pay stratum of the Third Sand. 449-402 
Hard black shale 462-477.5 
In this well the sand is the besl yet found,. The well is the best producer in the 
Newton Pool. It produced in the first twenty-four hours and for several succeeding 
days 65 barrels of oil. The well flowed through the gas pipe and pumped througn 
the tubing. When the well was a year old it was producing 13 barrels a day. It is 
now ( December, 1004 ) producing 2 barrels a day. 
Hiameter, 5| inches from to 275 feet. Length of casing, 275 feet. Initial pres- 
sure, 85 pounds. 
266. Well No. .' <>n liw Philadelphia tract, Gilson Pool, 3 miles west of Grand Vallem 
Eldred Township, Warren County, Pa. 
[Completed February, 1891 Authority, Josiah G. Winger, contractor.] 
Feet. 
Subsoil; conductor hole 10 inches in diameter 0- 18 
Hard sandy shah- (limy) 18-100 
S« .ft uray sandstone, water 1 00-135 
