96 ANNUAL REPORT 
Crane Township.—Early in 1886 the Trenton was tested at Upper 
Sandusky and found dry. Later oil was secured in sections 6, 7 and 19; 
that in 6 and 7 is an extension of the Salem township pool; and that in 19 
is a small outlier. The dry holes have been more numerous than the pro- 
ducing wells; consequently the township has added little or nothing to the 
wealth of the country. 
GEOLOGY OF THE COUNTY. 
The surface of the county is level or gently undulating. On the west- 
ern side the Niagara limestone forms a narrow strip running north and 
south. On the eastern side there is a parallel strip about equal in width 
of the Corniferous limestone, and between the two a broad area of the 
Lower Helderberg. The succession of strata underground at Carey is as 
follows :! 
Feet 
PUTT E eg ei eo rel ae ee are cee eo am cee ae Tes ee eet RES Val aegays 2 
Lower Helderberg and Niagara limestones........... PASS | 
Niagarasshalevand es Clintontyesas acreuescrcrierieneinecerets cats 65 
Medina: Shalesrycses son sit ie sot ceka eh orerone g oebetccietees Gore 52 
Cincinnati- (Hudson River) sshalesecs ss scutes cee coe 650 
Utica “shales vise tatoee ee eae en ee ee eee 300 
Laie 9 01H 0) c Wate: Eee ee PME beeen eR ly htt bie Fy 1,326 
The Trenton was found to lie 515 feet below tide level; at Upper 
Sandusky it is about 480 feet below, and at Nevada, near the Crawford 
county line, about 830 below This shows a rapid descent east from 
Upper Sandusky. In fact the rocks of the county appear to lie quite un- 
even. Thus from what has been stated above it is seen that at Upper San- 
dusky the Trenton lies 35 feet higher than at Carey, though the former 
place lies east and south of the latter. This indicates an arch in the vicin- 
ity of Upper Sandusky. Another disturbance is found in section 34 of 
Crawford township, where the Trenton is reported to vary in position 100 
feet in less than a mile. 
In the vicinity of Carey the Trenton was found to be quite free from 
salt-water, but about one mile southwest of that town a heavy pool of brine 
was encountered, that sometimes ran from the well. Fine oil wells were 
secured in this. Southeast from Carey brine was found almost every- 
where. The water and oil were mixed, and consequently were pumped 
together. 
VAN WERT COUNTY. 
Oil territory in this county is not extensive, notwithstanding that it 
is found in five townships. The Allen county fields extend into Van Wert 
from the east and the Mercer ftom the south. Early wells were drilled 
wholly for gas, and were practically failures. 
1Geol. Sur. of Ohio, Vol. VI, p. 204. 
