68 ROCHESTER ACADEMY OF SCIENCE. fj^"- I It 



and will yield that amount for years ; the sand being close grained, it 

 drains slowly. 



From the central and northern portions of Allegany Co. the 

 writer has not yet been fortunate enough to secure specimens for 

 examination. On this account it is not possible to correlate posi- 

 tively the bottom of the Richburgh wells with those of the southern 

 part of Wyoming Co. A number of wells have been drilled in this 

 region and the drillers' record of several is given below ; but without 

 samples for examination it is not safe to attempt the correlation of 

 these records. (') 



(i.) June 6th, 1891, Afr. A. W. McQueen, of Nile, Allegany Co., N. V., furnished me the fol- 

 lowing partial records of wells drilled by himself in this region. 



"A well at Nile 'getting the sand ' at 1200' would commence in blue slate (or shale) and con- 

 tinue the same to about 400', excepting three or four white sands, from 3' to 5' thick. From 400' to 

 600' is mostly a hard blue rock, having marble white streaks in places; at about 600' we get a white 

 sand 20' to 30' thick [ist sand?]. Soft blue rock now runs the well down to 880', where we get the 

 second sand, which is about 20' thick, dark colored and followed by 10' of blue slate, after which we 

 get the same sand again, this time with salt water (about 14 barrel an hourj. This is followed by 270' 

 of what seems to be a pure slate, not a particle of grit in it, until the last 20' or 30', when a few little 

 ' shells ' are met with ; only a little ' skim ' of oil sand is found here, 3' to 8', and wells produce from 

 2 to 15 barrels per day. For a distance of 400' below the oil sand there is nothing but a dark colored 

 slate rock." 



The above record may be expressed diagrammatically as follows : 



SECTION AT NILE, N. V. 



Thick- 

 ness. 

 400' Blue shale. 



200' 

 600' 



30' White sand [ist sand (?)]. 



630' 



250' Soft blue rock. 

 880' 



20' " 2d sand," dark colored. 

 900' 



10' Blue slate. 

 910' 



? Sand again with salt water. 



270' P ure slate, no grit until the last 2o' to 30' when there area few "shells." Oil sand 3' to 8'. 



1200' (?) ■ 

 1600' (?) 



400' Dark colored slate. 



" A well drilled in Friendship village had the same formations down to and including the salt 

 water ; below which we found only a soft blue slate or shale, getting quite dark colored when we had 

 finished at 600' below the salt water. Total depth of well 1330' and it was located about 20' above the 

 N. v., L. E. & W. R. R. station." The altitude of the N. Y., L. E. <fe W. R. R. station at Friend- 

 ship is 1539' (Bull. U. S. Geol. Surv., No. 76, p. 143) which would make the altitude of the mouth of 

 this well about 1560'. 



Two wells were drilled by Mr. McQueen near Marshall, in New Hudson township, about iw^ 

 miles from the Genesee river. " No. 2 was on the level of Crowford creek and was drilled to the depth 

 of 2075'. No gas or oil and no sand rock, except a very little near the top of the well. From 1200' to 

 bottom of well the rock was nearly or quite all slate ; at about 1800' a rock filled with copper-colored 

 particles, supposed 10 be iron pyrites, 20' to 30' thick ; below this a soft slate, nearly a perfect coal black, 

 and finished with the rock still very dark colored. No. i was about 1000' from the 2d, was drilled 

 about 1400' and found a little gas which burned for two weeks. 



" Another well four miles from IJelfast, on Wigwam creek, in Allen township, was drilled toadepth 

 of 1520'. The formations were about the same, though I found at 720' about three feet of close (very 

 fine) white sand with gas and oil. The well made a barrel of oil per day for a week or so when gas 

 and oil failed. The oil was of very light color. 



" All wells in the northern part of this county showed a soft slate or shale formation, light in color 

 at the top and dark at the bottom." 



