66 



THE ICE AGE IN CANADA. 



sixty-feet terrace, the rock-surfaces are rough, and yet 

 large boulders often rest directly upon them. 



The till or hard boulder-clay of this coast would be 

 claimed by some glacialists as glacier work ; but there 

 can be no doubt that these clays locally contain marine 

 shells, and there is therefore no need of invoking land-ice 

 for their deposition. In this respect they agree with the 

 drift-deposits of the lower St. Lawrence generally, except 

 in the case of certain lateral valleys which seem to have 

 been occupied with local glaciers descending from the 

 Laurentian highlands. 



TERRACES, NORTH SHORE OF LOWER ST. LAWRENCE. 

 Heights in English feet, roughly taken with Locke'' s level and aneroid. 



Les 



Eboulements. 



900 . . 

 660 . . 

 479 . . 



Petite Mal Bay. 



325 

 226 



116 



22 



748 

 505 



318 

 239 



145 



26 



Murray Bay. 

 W. Side. 



892 



345 



136 



50 

 32 



448 

 378 

 312 

 281 

 139 

 116 

 81 

 30 



E. Side. 



455 

 346 



259 



127 

 73 



Another series of levels taken by Mr. W. B. Dawson, 

 along the road to Petit lac and beyond, gives the following 

 heights : 



Feet. 

 Hill south of Petit lac, with drift and boulders at this 



level 1374 



Drift ridge east of lake 810 



Water level, Petit lac ; appears to discharge over 



drift ridge or moraine 728 



Clay, capped with 10 feet sand 589 



Clay terrace 241 



'' '' bank Murray Bay river 73 



