38 Canadian Record of Science. 



Proceeding inland, we fiud a second terrace about thirty 

 feet above the sea, and consisting of sand, resting on hard 

 boulder-clay or till. This last at different places along the 

 coast is seen to vary in quality, being sometimes hard and 

 loaded with boulders, in other cases a clay with marine 

 shells, and again a clay with few boulders except at its 

 junction with the sand above. On the inner side of this 

 terrace, where it adjoins the rocky ledges inland, there is 

 often a raised boulder-beach like that on the present shore, 

 but with fewer and smaller boulders, as if the transporting 

 power had been less than at present, and possibly the time 

 of its action more limited. But still higher, on rocky ledges 

 rising to the height of fifty to sixty feet, there are large 

 Laurcntian boulders, on the average larger than those of 

 the present shore, perched upon the bare rock and with a 

 few Upper Silurian boulders from the south, which become 

 more numerous and larger further inland. In some places 

 these Silurian limestone boulders are sufficiently numerous 

 to afford the material for the supply of lime-kilns providing 

 for local requirements. 



The exposed ridges of rock on the second terrace are 

 sometimes polished with ice action, but without distinct 

 striation, and especially on the southern and eastern sides. 

 I had no opportunity to observe the condition of the rock 

 surface under the boulder-clay. , On the greater part of the 

 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 claim- 

 ed 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 de- 

 position. In this respect they agree with the drift deposits 

 of the Lower St. Lawrence generally, except in the case of 

 certain lateral valleys of the north shore which seem to 

 have been occupied with local glaciers descending from the 

 Laurentian highlands. 1 



'See Notes on Post-Pliocene of Canada, Canadian Naturalist, 

 1871-2. 



