180 THE ICE AGE IN CANADA. 



It contains a few shells of Tellina Groenlandica and Leda 

 glacialis, and a little inland, at Bergeron river, it also 

 contains Cardium Islandicum, Astarte elliptica, and Ehyn- 

 chonella psittacea. It resembles some of the beds seen on 

 the south side of the river St. Lawrence, and has also 

 much of the aspect of the Leda clay, as developed in the 

 valley of the Ottawa. On this clay there rest in places 

 thick beds of yellow sand and gravel. 



At Tadoussac these deposits have been cut into a 

 succession of terraces which are well seen near the hotel 

 and old church. The lowest, near the shore, is about ten 

 feet high ; the second, on which the hotel stands, is forty 

 feet ; the third is 120 to 150 feet in height, and is uneven 

 at top. The highest, which consists of sand and gravel, is 

 about 250 feet in height. Above this, the country inland 

 consists of bare Laurentian rocks. These terraces have 

 been cut out of deposits, once more extensive, in the 

 process of elevation of the land ; and the present flats off 

 the mouth of the Saguenay would form a similar terrace 

 as wide as any of the others, if the country were to 

 experience another elevatary movement. On the third 

 terrace I observed a few large Laurentian boulders, and 

 some pieces of red and gray shale of the Quebec group, 

 indicating the action of coast-ice when this terrace was 

 cut. On the highest terrace there were also a few 

 boulders ; and both terraces are capped with pebbly sand 

 and well-rounded gravel, indicating the long-continued 

 action of the waves at the levels which they represent. 



Murray Bay, etc. At Murray bay, Petit Mai bay, and 

 Les Eboulements, as noticed above, the system of Pleisto- 

 cene terraces is well developed. On the west side of 

 Murray bay, the Cambro-Sirurian rocks of White point, 

 immediately within the pier, form a steep cliff, in the 



