E. B. Delabarre, Ph. D. 211 



glacial epoch were radially outward from the centre of 

 discharge, viz. : the southwestern portion of the peninsula. 

 Baron De Geer has shown that with a similar dispersal of ice 

 from the centre of the Scandinavian sheet, there may be 

 correlated differential elevation of northwestern Europe in 

 post-glacial times. This uplift of the continent has been 

 greatest at the centre of radiation, and, in general, becomes 

 progressively less with increasing distance from that centre. 

 If, as seems natural, we may assume that the currents within 

 the ice-cap moved from the centre outwards because the cap 

 was thicker there than on the edges, it is legitimate to follow 

 De Geer in forming his explanatory hypothesis of the cor- 

 relation between ice-radiation and post-glacial elevation. 

 Uplift has been most pronounced where the earth's crust 

 has lost the greatest load by the melting of the ice-cap; less 

 and less pronounced along the radii leading from the region 

 of greatest thickness of ice. The earth's crust is, then, 

 elastic, and sensitive to a load relatively so insignificant as 

 a regional glacier. 



De Geer saw that it would help his case if he could find 

 a second example. He discovered that North America, 

 while in the main telling the same story, could not furnish 

 so complete a homologue on account of the lack of inform- 

 ation regarding the maximum amount of post-glacial uplift 

 in Newfoundland and Labrador. I was able to determine 

 with a small margin of error the position of the highest post- 

 glacial shore-line from St. John's to Nachvak Bay, a distance 

 of 1,100 miles. The result is to supply so much of a gap 

 in the information necessary to test De Geer's theory; and, 

 in the main, the theory is strengthened by this addition to 

 the list of observations on crustal movements. Incidentally, 



