78 ROCHESTER ACADEMY OF SCIENCE. [JaN. II 



Section of Rock (Ilen Well. 

 Compiled from data given by Professor Bishop. 



' Altitude 1310' A. T 



DEPTH \"J£^' KIND OF ROCK. FORMATION. 



128/2' "Soil." 

 i28>4' f Portage. 



1361^' "Sandstone and shale." 



1490 

 1630 

 2015 

 2040 

 2071 

 201 1 



Genesee. 



Hamilton. 



Marcellus. 



140' " Corniferous limestone." Upper Helderberg. 

 Lower Helderberg. 



385' " Lower Helderberg." 1 O 



25' "Salt." 

 II ■ "Shale." ( ^ 



40' "Salt." 

 Bottom of well. 



C 



At Warsaw, nine miles NNW of Castile, several wells have 

 been drilled on the western side of the valley. Of the considerable 

 number of wells drilled near Warsaw, one of the best for our purpose 

 is the Gouinlock and Humphrey well (formerly called Humphrey- 

 Stedman), which is located a short distance north of the "Erie " sta- 

 tion and is reported by the driller, Mr. Thos. Percy, as two feet lower 

 than the R. R. track, which would give an altitude of 1324' for the 

 mouth of the well. This well is mentioned in a general way by Dr. 

 Engelhardt, (') while Professor Bishop gives a partial record of the 

 well, which was much more complete after the salt was reached giving 

 the thickness of the different layers of salt and shale ('). These data 

 have been supplemented by information furnished by Mr. Percy, which 

 was kindly given me by Dr. H. S. Williams, and also by notes sent 

 me by Dr. ^\^ C. Clouinlock. 



(i.) Ann. Rept. Supt. Onondajja Salt Springs, for 1888, p. 18. 

 (2.) sth Ann. Rept. State Geologist [of New York] for 1885, p. 23. 



