Bishop — Geology of Ekie County. 



From bottom of white Medina to the top of the Trenton lime- 

 stone., the Albert Moore well gave 1,635 feet; the South Park 

 well, 1,800 feet, and the Depew well, 1,869 feet. 



The Trenton limestone in the Bradshaw well, near lake 

 Ontario, was 680 feet; in Well No. 2, 710 feet, and in the Depew 

 well, . 720 feet. 



The Ccbfaiferous, resting on the Laurentian gneiss, was in the 

 Bradshaw well, No. 1, ten feet; in No. 2, twenty feet; in the 

 Depew well, . . . . • 110 feet. 



Without reaching the Archean, total thickness of above section, 5,561 feet. 



The deep Richardson well at Zoar, which has been quoted 

 above, passed through the white Medina at . . . . . . . .2,910 feet. 



Adding from the Depew well, the shales below, 1,869 " 



And the Trenton, . . . . . 720 " 



With Calciferous, 110 " 



We have a total of . 5,609 feet. 



A difference of only forty-eight feet in the results, as shown by the two 

 computations, shows that the estimates are approximately correct. It will be 

 noted, however, that the Calciferous was not fully penetrated in the Depew 

 well, and that the Richardson well is not situated upon the highest land in 

 that part of the county; so that the total thickness is probably from 100 to 

 200 feet more than the result given above 



Rock-Salt. 



The borings in Erie county have added materially to our knowledge of 

 the extent of the Western New York salt-field. Thick beds of rock-salt are 

 known to occur at Boston Corners and at Springville, while the northern 

 edge of the same deposit was pierced in the old well southwest of East 

 Aurora. At Gowanda and Zoar the drill passed through the Salina shales, 

 finding brine, but no salt, in the rock-salt horizon. The limit, north and west 

 of which rock-salt has not been found in the county, and is not likely to be 

 found, is a line drawn from East Aurora to Patchen, curving westward near 

 Boston Corners and thence southward, crossing Cattaraugus creek about 

 three miles west of Springville. It is, therefore, probable that a well sunk to 



