ITS TlIK K'K A(;K IX CANADA. 



tlii.'." latei' or jxist-^iflacial n,u;(j also lielont;- the bouldci' 

 pavements of lakes, llio shore ■>' i;('s, the oyster licds and 

 llie sand dunes described in the sanic work and in the 

 " .Su})pleinent " to it ([)atfe 17). 



IV. — Jjoi'rr Sf. JAiti'i'cucc — North Suh'. 



Descriptions of the ricistocene deposits of this rcLcion 

 are contained in s('\('ral of my ]»aj»ers ahove cited, hut 1 

 sliall liere give a sunimavy of these, with some Cdn'octions 

 and additional facts fihtained within the ])ast few years. 



S<i(ji(rn(iii Ji'iiri: — 1 ha\e already, in part lirst, referred 

 to the glacial striation of this region, and ]ierha])S no 

 better exanii)le couM be found of those lateral valleys 

 along which ice seems to have been ]»oured into the St. 

 Lawrence from the north, 'i'lie gorge of the Saguenay is 

 a narrow and deep cut, luuning nearly N.'W. and S. Iv, or 

 at right angles to the course of the St. r.awrence, and of 

 the T.aurenlian ridges. It extends inland more than 

 forty-tive miles, and then divides into two bi'anches, one 

 f»f whieh is occupied by the continuation of the river to 

 lake St, .b)hn, the other by ITa-lIa bav and a ^allev at its 

 head, in the lower ])art of its conrse, as far as Ifa-lia 

 l)ay, this gorge is from ~>Q to 140 fathoms deep below the 

 level of the tide in the St. Lawrence, indicating an eleva- 

 tion of the land to that extent or more, at the time when 

 it was excavatetl. In .some places the clifl's on its banks 

 rise abrnptly to 1,500 feet above the water level, so that 

 its extreme dejith is nearly 2,400 feet, while its width 

 varies from al)out a mile to al>out one and a-half. The 

 striated surfaces and tlie rorues motif.otuiecs seen in this 

 gorge and on the hills on its sides, to a height of at least 

 .'-)00 feet, shew that in the glacial jjcriod a powerful 

 stream of ice must have flowed down the gorge into the 



