Yol. 54.] ON THE GLACIAL GEOLOGY OP SPITSBEEGEN. 227 



With regard to the question of the excavating power of an 

 advancing glacier, he thought that the very mode of advance 

 of Arctic glaciers, as described in the paper, militated strongly 

 against any appreciable action of this kind. 



Commenting on the contrast between the angular contour of the 

 higher ground and the curved slopes below, he pointed out that 

 the extremely rapid weathering so clearly taking place at the 

 present day must long since have removed most of the more obvious 

 signs of glaci^tion, if these had been impressed on the high ground 

 in former times. 



He described a deposit of glaciated fragments of granite and 

 diabase occurring on the plateau of Sticky Keep in the Sassenda], 

 at a height of 1200 feet above the floor of the valley. These 

 rocks must have been removed from the north, and have crossed 

 the Sassendal, unless we assume the formation of the valley sub- 

 sequently to the transport of the boulders. In his second visit to 

 the island last summer, he had obtained evidence confirmatory of 

 this, which he hoped to have the pleasure of laying before the 

 Society at an early date. 



