98 THE ICE AGE IN CANADA. 



"Again, tlic elevation and extent of tlie liigliest portions 

 of Canada are liardly suHicient to aceonnt for the requisite 

 accunuilation of snow and ice. And, finally, so far as I 

 have learned, there is not found u[)on tiie rocks of the 

 nortliern slope of Canada, nor in boulders moved by 

 glacial force, any satisfactory evidence that there has 

 been a nortliward as well as southward movement of 

 glaciers from the hiy-hlands of Canada." * 



Kefusing, however, to take into account the Pleistocene 

 depression and the agency of tioating ice, he finds himself 

 under the necessity of adopting (Ireenland as the focus of 

 dispersion and movement of glaciers for north-eastern 

 America. 



" If, therefore, the phenomena of the northern and 

 eastern United States usually supposed to be glacial are 

 indeed .such, and if there is not sufficient reas(jn for 

 assuming the Canadian highlands to have been the source 

 of the glaciers which produced these phenomena, then 

 their source nnist be found elsewhere. I think it will be 

 conceded ])y all geologists who have studied the glacial 

 phenomena of these regions, that both the character of 

 the erratics and the direction of the scratches upon the 

 rocks show that this source must lie to the north-east. 

 Following the line of glacial movement across Baffin's bay 

 and Davis' strait into (Ireenland, we find the largest body 

 of land in the northern hemisphere covered by ice and 

 snow to a depth of not less than 2,000 feet, and at this 

 moment sending down its icebergs as far as the Middle 

 Atlantic. 



" From the sixtieth degree of latitude to above the 

 eightieth, this vast area of land is known to be ice- 



* As already stated, later ol)servatious furnish this evidence. 



