282 



basalt sheets is proved by the fact that the latter are not nearly 

 so broken up as the older rocks. 



As to the development of the district in other respects 

 during the latter part of the Tertiary age, we know nothing. 

 At its close the ice, as in other areas, pushed forward and 

 gradually covered at least the greater part of the laud; along 

 the main valleys it even pushed its way beyond it. During this 

 phase the fjords received their shape, and in the foregoing we 

 have also tried to show to what extent the topography of the 

 country bears traces of the activity of the ice. 



Very curious is the area occupied by the southern part 

 of Jameson Land. I have described it in the foregoing (p. 251); 

 it seems as if it had never been covered with connected 

 masses of ice. 



During a phase of the post- tertiary period the land was 

 sunk much below the present level. It can be shown that this 

 submergence reached at least 50 to 70 metres^), but there is reason 

 to believe that it was even considerably greater than this, in 

 any case several hundred metres. But before we can be quite 

 clear upon this point, fresh investigations are required. 



On the whole it cannot be doubted that very important 

 geological and geographical results may be obtained in this 

 territory, where we are now beginning to achieve a charto- 

 graphic basis, and a general knowledge of the district that 

 shows how many interesting questions here await their solution. 

 It is to be hoped that the Danish expedition now sojourning 

 in those parts may return with material contributions to our 

 knowledge of a region surpassed by few in the interest it 

 affords. 



^) It was already pointed out by Nathorst that the climate during a 

 period of this submergence was milder than at present, since shells 

 of the Mytilus edulis, now extinct in that part, are found at a height 

 of 25 m and above. 



