Cushinct — Potsdam Boundary. 



25 



the exposures of the same formation to the southward harmonize with this 

 view. 



At Clarkson's quarry, three miles south of Potsdam, the rock is a firm 

 red sandstone which is so cross-bedded and jointed that it is not easy to 

 make out the true dip, which is, however, somewhat to the south of west. 



Figure 2. Map of a portion of Potsdam and Pierrepont Townships. 



The lithologic character of the rock suggests an horizon low in the for- 

 mation. A short distance further south, at Merritt and Tappan's quarry, 

 the flesh-colored stone is banded with white and the structure is synclinal, 

 as shown by N. H. Winchell.* Nearly a mile further south are excellent 



*Loc. cit. p. 101. 



