lines.] DETAILED RECORDS. 95 
Feet. 
Soft black shale 1 35-150 
Hard gray sandstone ; first stratum of First sand 1 50-160 
Soft black shale 160-170 
Soft gray sandstone; second stratum of First sand; salt water cased off... 170-185 
Soft blue shale; end of 8-inch hole and end of 5|-inch casing 185-200 
Soft black shale 200-223 
Hard white sandstone, pebbly; Second sand. This 11 feet of sand overlies 
the oil stratum. It is separated from the lower stratum by a layer of 
shale 6 inches thick 223-334 
Soft white sandstone, pebbly. This 21 feet of oil sand is very coarse, full 
of pebbles, and easy to drill. Oil, gas, and salt water in this lower 
stratum of the Second sand 334-355 
Black shale; "gravel bed" from 661 to 671 feet 355-375. 5 
This is the best Second sand pool in this oil field. The sand is very porous. One 
well of the pool has a record of over 6,000 barrels of oil in its first year. The besl 
wells found in the pool are located on the Theodore Gilson farm, on the Spring Creek 
and Titusville public road. The pool was developed by Stewart Brothers and later 
by Tait & Patterson. Yield for the first twenty-four hours, 32 barrels of high- 
grade oil. 
218. Well No. 19, on the Sayers farm, three-fourths mile southeast of Grand Valley, Eldred 
Township, Warren County, Pa. 
[Begun November 14; completed November 22, 1904. Authority, Josiah G. Winger.] 
Feet. 
S« >f t 1 >ro wnish yellow clay 0- 20 
Si ift 1 >ro wnish yellow quicksand and blue clay 20- 80 
Soft blue clay and gravel 80-100 
Soft gray sandy clay and gravel 100-120 
Hard blue sandstone 120-140 
Soft variegated sandstone; 5 feet of First sand at 155 feet 140-180 
Hard black shale 180-300 
Hard gray sandy shale 300-315 
Soft blue shale 315-340 
Hard blue shale 340-400 
Hard blue sandy shale 400-420 
Hard gray shale and sandstone 420-440 
Hard gray conglomerate; Third sand; oil in first 10 feet 440-460 
Hard white sandstone; salt-water sand 460-485 
Gray sandstone ; gas sand 485 \' »< I 
Soft white sandstone; oil sand, the lower stratum of Third sand 490-500 
Hard shale 500-520 
The quantity of salt water is small, on account of the remarkably fine texture of 
the salt-water stratum. The sand in a well drilled for the Stanton Oil Company in 
1890, only 80 feet distant from this one, was much coarser than this, and the salt 
water was so plentiful that the company abandoned the well. 
Diameter of well, 8 inches from to 310 feet, 8-inch drive pipe from to 140 feet, 
65-inch casing from 140 to 310 feet. Before the 65-inch casing was placed fresh water 
rose to within 60 feet of the mouth of the well. Yield of oil the first twenty-four 
hours, 12 barrels. 
