68 



The Encrinal limestone, eighteen inches to two feet thick, 

 is well exposed. The ^vhole of the Upper or Moscow shales 

 (seventeen feet) are exposed. The divisions into lower 

 Moscow (shales bearing the Spirifer consobrinus fauna), 

 middle Moscow (barren shales), and upper Moscow (shales 

 bearing the Spirifer tullius fauna), are retained throughout. 



The whole of the Genesee shales — twent\'-three feet and 

 seven inches thick (Hall), are exposed, beginning at the base 

 with the St\diolina layer. The subdivision into lower gray 

 and upper black shales is not as marked, as in the gorge of 

 Eighteen Mile Creek. The whole thickness of the gray 

 Naples or Cashaqua shales is exposed, this, according to 

 Hall being thirty-three feet. Probably less than one 

 hundred feet of the upper Naples or Gardeau shales are 

 exposed in these sections, the lower half of which consist of 

 black and fissile shales, while the upper, remaining exposed 

 portion, consists of alternations of olive and gray or black 

 shales, with septaria in the lighter colored beds. 



This mav be tabulated as follows : 



