1 98 Wilson — Glaciation of Orford and Sutton Mts., Quebec. 



latter lying in part to the south of the boundary. Three miles 

 west of Bear Mountain a similar ridge known as Hawk Moun- 

 tain is a prominent topographic feature. 



West of the Sutton ridge, near the boundary, St. Armand 

 Pinnacle is the culminating peak of a minor ridge of raetamor- 



4 MILES. 



Sketch plan of the area west of Lake Memphrernagog, Quebec. 



the 



phic rocks which has a greater development south of 

 boundary. 



The valley between Sutton ridge and Orford ridge is cut on 

 softer schists and serpentines. It is drained by the east 

 branch of the Missisquoi River. This branch crosses Sutton 

 ridge in a deep gorge (two miles south of the boundary line), 

 through which the Canadian Pacific Railway runs, and joins 

 the north branch of the same stream at Richford, Vt. The 

 valley west of the Sutton ridge, between it and St. Armand 

 ridge, is drained by the north branch of the Missisquoi River. 



