Lesley.] 



64 



[April. 



feet thick, from the midst of which (128 — 68 = 60 feet below its 

 top layer) there was a flow of salt water. The 74 feet of soft slate 

 under it, and then 2 feet of red slate, seem to represent No. XI. 

 There is no sign of the Sub-carboniferous (XI) Limestone of the West 

 here ; although no test for lime seems to have been thought of. and, 

 therefore, the close-grained blue sandrock, 20 feet, may be calca- 

 reous. The " red slates," at 750 — 755, 786 — 815, and 892 — 894, 

 look like representatives of Formation IX. The '* hard sandrock," 

 10 feet, at 755 — 765, is the only one in the section which can be 

 considered as occupying a position analogous to that held by the first 

 sandrock of Oil Creek. It lies (755 — 183 = ) 572 feet below the 

 base of the Conglomerate (taken as above at 183), which is more 

 than 100 feet less than its observed distance beneath the Conglome- 

 rate on Oil Creek ; but the discrepancy may be accounted for -partly 

 by the extra thickness here of the Conglomerate. Neglecting the 

 " sooty substance, with smell of oil" at 750, the first show of oil is 

 at 970 feet, or (970 — 183 = ) 787 feet below the ba.se of the Con- 

 glomerate, corresponding to the Second Oil Eock of Oil Creek, 

 which is about 900 feet beneath the Conglomerate. The place of 

 the Third Oil Rock, and principal horizon of oil on Oil Creek, will, 

 therefore, be at least 150 feet beneath the extreme depth to which 

 this well has been sunk. 



Mr. Lyon has furnished, also, a complete record of another im- 

 portant well, 891 feet deep, sunk into the extreme upper part of the 

 Devonian Measures, on the Alleghany River, at Freeport, 25 miles 

 above Pittsburg, and, therefore, 50 miles due south of Oil City. 



Strata bored through in Salt Well, on Alleghany River, 25 milea 

 above Pittsburg. Working coal stratum 3'6" thick in the hill, 

 Zb feet above surface at the well. 



Well, through loam and sand, 



Rock, blue and hard, 



Blue sand rock, with 8 to 10" iron ore, 



Gray sand rock, softer, 



Blue slate rock, 



Blue sand " 



Coal, 



Fire clay, . 



White slate, 



Limestone, 



White slate rock. 



White sand rock, 



Blue slate " 



^COAL, 



Ft. In. 



