GENERAL GEOLOGY OF CLAYSYILLE QUADRANGLE, 
61 
be obtained), beginning with No. 1092 at the north and ending with 
No. 1191 at the south, appears to mark effectively the western limit 
of this productive area. Well No. 1091, at the center of the saddle 
on the Washington anticline where it crosses Tenmile Creek, is a 
small producer in what is reported to be the Gordon sand, but ac¬ 
cording to the record of this well the interval between the producing 
sand and the Pittsburg coal is the same as that given in adjacent wells 
for the Gordon Stray sand, and it is possible that the producing sand 
has been incorrectly identified. The productive belt seems to pinch 
out at this point, but the chances of its extension to the southwest are 
discussed on page 63. On the north side of this basin, to the west 
of well No. 541, the Fourth and Fifth ^ands have been found pro¬ 
ductive as far west as Buffalo Creek, but so far as known none of the 
test wells put down west of this creek struck the sand at the right 
level to obtain oil. 
Most of the oil coming from the Gantz and Fifty-foot sands is 
found in and to the west of Washington and around the head of the 
basin northwest of Woodell. These sands also carry more or less 
oil at a few other places, as shown on the map (PI. XIII). 
As stated elsewhere these sands together are equivalent to the 
Hundred-foot sand of the Burgettstown quadrangle. The original 
Gantz Avell (No. 1010) is in the borough of West Washington. This 
well was finished January 1, 1885, and was the first paying oil well 
drilled in Washington County. It flowed 50 barrels per day from 
the Gantz sand and was later drilled deeper and became a producer 
from the Gordon sand." The Gantz sand is reported in all the de¬ 
tailed well records throughout the quadrangle, with a thickness rang¬ 
ing from 10 to 60 feet. Its greatest production comes from the 
eastern portion of the Washington-Taylorstown field. The Fifty- 
foot is also widespread and yields oil and gas in about the same locali¬ 
ties as the Gantz. In only a few records is any mention made of salt 
water in these sands. 
POINT LOOKOUT OIL POOL. 
The Point Lookout pool contains only three producing wells, all of 
which obtain oil in the Fifth sand. No information in regard to the 
condition of the different sands penetrated in these wells could be 
obtained, and the records fail to show the facts of most vital impor¬ 
tance in regard to the extension of the pool, namely, the amount of 
salt water occurring in the different sands. Two dry holes (Nos. 
876 and 798) have been drilled near enough to this territory to be 
of value in determining the direction in which to prospect, but unfor- 
a p or the early history of the Washington field see Carll, J. F., Ann. Eept. Geol. Survey 
Pennsylvania for 1886, 1887, pp. 622-623, 
