304. ANNUAL REPORT 
Strong farm in the southwest corner of Jefferson township reached a depth 
of 2,240 feet, but was dry. One on the Bancroft farm near Eagleville, 
found a heavy deposit of salt-water and so was abandoned. In the southern 
part of Plymouth township a well has been drilled on the Van Aken farm, 
but this was entirely dry. 
A number of samples of drillings from below the Ohio shales have 
been provided the Survey for examination. These from the top of the 
Devonian limestone have a gray color and contain may fragments of fos- 
sils. A sample taken 25 feet lower had similar characters. Both effer- 
vesced freely with cold hydrochloric acid. The “gas sand” is composed 
almost wholly of quartz. It contains many fossil remains, especially Favo- 
sites or closely related forms. The “Salt sand” which lies immediately 
below has a light gray color. It consists of quartz with a little lime, the 
latter probably acting as a cement. The oil sand is much like the above. 
From: what has been said it is seen that the oil, gas, and salt rocks are 
sandstones lying about 300 feet below the base of the Ohio shales. This is 
the place of the Lower Helderberg limestone and the formation in question 
doubtless is of similar age. Similar beds of sand have been found in 
the Lower Helderberg in other parts of Ohio and adjacent states. Good 
examples are found at Monclova and Sylvania, in Lucas county, where the 
rock is of such quality that it has been used quite extensively in glass man- 
ufacture. Another good exposure is found in Wood county, where it 
is known as the Grand Rapids sandstone. Dr. Orton has expressed the 
opinion that the formation which is the source of the brines that supply the 
great salt works at Cleveland, Wadsworth and other points in the north- 
east corner of the state is probably the equivalent of the sandstones just 
mentioned.t Those of Ashtabula county occupy a similar position. © 
GEAUGA COUNTY. 
The surface formation in this county belongs in part to the Coal Meas- 
ures, in part to the Lower Carboniferous and in part to the Ohio shales. 
The Pottsville conglomerate is prominent, forming in places a conspicuous 
escarpment. 
A number of deep wells have been drilled, but the records have become 
scattered or lost, and consequently it has been impossible to secure accu- 
rate data. In 1899 a well was drilled on the Kiser farm near Hampden. 
According to report a depth of 2,472 feet was reached; the Berea was 
found at 175 feet and the Corniferous limestone at 2,000. Nothing more 
than a show of oil was reported. In the summer of 1902 a well was drilled 
on a neighboring farm owned by Mrs. Huntoon. No report has been re- 
ceived of the result. 
About the year 1888 a well was drilled on the Hovey farm in Munson 
township. The depth reached is reported at 1,500 feet. Some gas was 
1Geol. Sur. of Ohio, Vol. VII., ‘pp. 17-18. 
