1^6 NEW YORK STATE MUSEUM 



was drilled in 1908-9 by J. E. Dunnigan, Friendship, N. Y., who 

 supplied the following details. It showed a Httle gas. 



Gray sand, some gas and oil at 275 feet 



Second gas streak in sand at 400 

 Chocolate sand with a little gas and oil at 975 



Black and brown shale chiefly to 2 650 



Hard limestone at 2 650 



Rock salt (65 ft.) at 3 050 



Blue shale at 3 nS 



Blue shale to bottom at 3 200 



The limestone found at 2650 feet was doubtless the Onondaga 

 but the top was probably reached before that depth, as the normal 

 distance between the salt and the first Onondaga beds in the 

 western areas is 500 to 600 feet. 



Cattaraugus county. As in Allegany county, the principal gas 

 pools so far developed He in the southern townships and are associated 

 with the oil-bearing strata in the higher Devonian formations, an 

 extension of the Pennsylvania oil and gas field. The productive 

 district covers parts of Olean, Allegany, Carrollton, Redhouse and 

 Humphrey townships. The reservoirs occur in sandstones that lie 

 at several levels from 500 to 1600 feet depth. One of the horizons 

 is regarded by well drillers as the equivalent of the Bradford sand. 

 The first oil well was drilled in 1864 and the county was a large 

 producer for a time, but the wells now have to be pimiped and the 

 average output is only a fraction of a barrel a day. The surplus 

 gas is sold to the distributing companies who have pipe-lines to the 

 larger consuming cities. Further details of wells will be found under 

 the head of petroleum. 



Exploration for gas in northern Cattaraugus county has shown 

 the presence of deep horizons in what are regarded as Marcellus, 

 Onondaga and Medina formations. The most successful wells are 

 in the vicinity of Gowanda and between there and Cattaraugus 

 creek and are thus partly in Erie county. The first important well, 

 according to Bishop, was drilled in 1898 near the tannery of Grenssler 

 and Fisher and yielded a flow estimated at 7,000,000 feet a day. 

 The horizon is referred to the Marcellus shale, 25 feet above the 

 Onondaga. A second well put down nearby showed a good flow 

 from the Comiferous beds of the Onondaga. The Medina sandstone 

 has been tapped in certain deep wells within the Cattaraugus reser- 

 vation, west of Gowanda. 



Vinton well, Gowanda. This well is recorded by Bishop as drilled 



