390 



Report of the State Geologist. 



The Hamilton and MarceUus shales in the well at Eighteen- 

 Mile creek are, together, 287 feet thick. In the Heiser well at 

 Woodlawn, one and one-half miles north of the edge of the 

 Hamilton, the Marcellus is 125 feet thick, and is probably not 

 less than 140 feet in all, making the Hamilton shales, . . . . 147 feet, 

 and the Marcellus shales, 140 feet. 



The Corniferous limestone, Onondaga limestone and 

 Water-lime, all being hard, are classed together by drillers as 

 "flint." The well at the Snow Steam Pump Works, near the 

 southern edge of the Corniferous, in Buffalo, had 140 feet of this 

 flint. The Sherman-North street well had 150 feet. An examin- 

 ation of twelve other wells gives an average of 168 feet. The 

 wells at the Bennett cement quarries, Buffalo, begun below the 

 Onondaga, had, with the cement and " bull head " lying above the 

 mouth of the well, sixty-two feet of water-lime. The Fogelsonger 



well on the same horizon had sixty-two feet of hard water- lime, 

 thus giving of 



Corniferous and Onondaga limestone, 108 feet. 



Water-lime, ..." 60 feet. 



The Salina shales, from the bottom of the flint to the hard 

 rock known to drillers as Niagara limestone (but possibly includ- 

 ing some Salina), averaged in ten wells, 386 feet. 



Making the Salina and Water-lime together 446 feet thick. 



The Niagara includes an upper limestone and a shale below, 

 the latter averaging seventy-two feet in thickness. The whole in 

 ten wells averaged 319 feet. 



The Clinton was from twenty-three to forty feet thick, and 

 averaged in nine wells, 27 feet. 



77/' Medina, including (a) a hard red sandstone, the "red 

 Medina:" (7>) a shale of varying thickness, sometimes absent 

 entirely, and (c) an almost white siliceous sandstone, known as 

 "white Medina." These collectively ran from 83 to 140 feet in 

 thickness, the white band being from four to thirty feet, but 

 usually ten to fifteen feet thick. 



Nineteen wells gave, of the whole, an average of 109 feet. 



