4 250 RECORD OF DEEP- WELL DRILLING- FOR 1905. 
Niagara — Continued. Feet. 
Hard white limestone (magnesian) 290-330 
Hard blue limestone (gray) 330-390 
"Little break " (gray limy shale), soft and sticky 390-415 
"Big break" (soft light-greenish shale), hard to drill; cuttings do not 
mix with water 415-460 
Clinton: 
Hard green limy shale with brownish limestone lentils 460-500 
Hard, heavy-bedded green shale, slightly limy 500- 540 
Medina: 
Soft dark-red shale . 540- 560 
Soft light-red shale ,560- 580 
Cincinnati: 
Soft blue shale (gray, slightly limy) 580- 600 
Soft blue shale (dark brownish and dark gray, slightly limy) 600- 640 
"Second Clinton" (hard gray shaly limestone). . 640- 720 
" Second Clinton " (hard gray limy shale) 720- 740 
Soft blue shale (gray, brown, and dark gray, limy) 740- 880 
Soft blue shale (dark greenish, slightly limy) 880- 940 
Soft blue shale (dark gray, slightly limy) 940- 960 
Soft white shale (dark gray and brownish, slightly limy) 960- 980 
Sofl white and blue shale (dark gray, slightly limy) 980-1 , 000 
Soft while shale (dark gray, slightly limy).... 1,000-1,080 
Utica: 
Soft brown shale (brown and gray, slightly limy) 1, 080-1, 320 
Trenton: 
• Hard light limestone 1 , 337 
Hard light-brown, gray, and dark-gray limestone; oil-bearing strata, 
1 ,337-1 ,355; salt water, 1 ,365-1 ,377 feet 1 , 337-1 , 377 
Rig used, cable. Diameter of well, 10 inches from to 14 feet; 8 inches from 14 to 472 
feet; 6 inches from 472 to 1,377 feet. Length of casing, 472 feet. Well yielded 5 barrels 
of oil, gravity 38° to 40° B., in the first twenty-four hours. From 472 to 1,327 feet hole 
was so dry thai water had to be run in for drilling. 
1287. Well east of Akron, Summit County. 
[Well begun May 12, 1905; completed July 24, 1905. Authority, James Douglas, contractor. Incora- j| 
plete set of samples preserved. Geologic correlations by S. Sanford.] 
This well, though it found neither oil nor gas in paying quantities, is of interest from 
its depth, being the deepest reported from Ohio, and also from the great thickness of the 
salt beds penetrated. The age of these beds is disputed. They have been assigned to 
the same period as the Cayuga group (Silurian) of New York, but the State geologist was 
inclined to include them in the Helderberg (latest Silurian). The overlying formations 
are of Mississippian (lower Carboniferous) and Devonian age and are thus classified: Cuya- 
hoga and Sunbury shales and Berea grit (Mississippian), Onondaga and Helderberg lime- 
stones (Devonian and Silurian), Helderberg and Cayuga salt beds (Silurian). The well 
may also penetrate rocks of the Niagara group (Silurian). 
Another well, 1 mile farther west, is said to have struck oil in paying quantities at 2,64£ 
feet. 
Record of well 3 miles east of Akron. 
Drift: _ Feet 
Gravel and quicksand 0- 13? 
Sunbury: 
Slate and limestone shells 139 30H 
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