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. 



MURRAY BAY. 



LES W. Side. 



EBOULEMENTS. PETITE MAL BAY. ,, *- ^ E. Side. 



900 892 ..- 



660 748 - . . - 



479 505 - . . 448 . . 455 



345 .. 378 . . 346 



325 318 - . . 312 



226 239 - . 281 . . 259 



136 .. 139 



116 145 - .. 116 .. 127 



50 .. 81 . . 73 



22 26 32 .. 30 .-. 



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 



