BUFFALO SOCIETY OF NATURAL SCIENCES 



I07 



Here we see that the Bertie follows upon the Camillus shales and 

 gypsum, a part of which may belong to the undoubted Salina or 

 Middle Siluric, but the upper part of which certainly belongs with 

 the Bertie to the Upper Monroe, since it contains Leperditia scalaris. 

 At Buffalo the Bertie is conformably succeeded by the Akron dolo- 

 mite, an impure rock 7 or 8 feet thick, containing the Upper Monroe 

 fauna sparingly distributed, and marking the return of normal marine 

 conditions. 



&<d 



Fig. 2. Sketch Map of New York Showing Location of Important Euryp- 

 terid-Bearing Beds 



1, Buffalo and Williamsville ; 2, Pittsford; 3, Waterville; 4, Litchfield and 

 Cranes Corners; 5, Schenectady; 6, Otisville. 



In areal distribution the typical Bertie is not a continuous forma- 

 tion, but is found well developed at only two localities; namely, in 

 Erie and in Herkimer Counties, New York, where the sediments were 

 deposited in what Clarke and Ruedemann have called the Buffalo 

 and Herkimer "pools." These two pools or basins are considered to 



