BY RICHARD HELMS. 355 



Just below the rise that leads to Pretty Point a small flat 

 occurs similar in nature to t!'<! last described, ending also, in a 

 southerly direction, at the margin of the Crackenback Valley, 

 near the place where it makes a turn. In this locality enormous 

 blocks of granite have been pushed over the declivity. One of 

 these erratics, weighing several hundred tons, rests on divers 

 others high enough from the ground to allow a man to pass 

 underneath. These characteristics leave the impression as if at 

 one time the ice had passed over the short range that runs north- 

 westwards from Pretty Point. 



The height of Pretty Point close by is about 5780 feet above 

 the sea, and from here the ground has a gentle slope of about half 

 a mile to the west as far as Thompson Plain, which, extending 

 for about a mile in a S.E. to N.W. direction, expands to a third 

 of a mile in width. This portion of the "plateau," which has 

 now been reached, is very interesting regarding its glacification, 

 for here evidently a large portion of the leading ice-stream pushed 

 its way in a southerly direction, splitting, so to say, against the 

 north-western portion of the spur that branches off from the 

 short range at Pretty Point. At the south-eastern end of this 

 branch, where it precipitates over the declivity of the Crackenback 

 Valley, a vast bedding of boulders has been formed, the remark- 

 ably close packing of which reminded me of the pack-ice when a 

 block occurs during the ice-flow in the northern European rivers. 

 At the northern end of this branch probably the largest of any 

 of the flat valleys found on the "plateau " runs east and westerly 

 for nearly two and a half miles, and at one time no doubt carried 

 one of the most continuous ice-streams that stretched across the 

 valley to the north of Pretty Point as far as the Crackenback, 

 as well as in the direction of Boggy Plain and Wilson Valley. 

 Not far from the junction of Thompson Plain and higher up, 

 particularly on its northern side, various massive granite facings 

 Vjear still the marks of the gouging action of the ice in their 

 concaved and deflexed surfaces, which are otherwise, however, 

 much eroded. .x<^^lT^ 



