26 Gr.ACIAL REMAINS IN THE NATIONAL PARK, 



On the east of Lake Webster there are ridges running 

 parallel with the sides of the valley, which may be medial 

 moraines formed on the larger glacier from the laterals of 

 the tributaries. But the traces are too confused to allow 

 certainty on this subject, and signs of the erosive effect 

 of the volumes of water that escaped from the glacier 

 and flowed over this newly-formed bed of till can be seen 

 everywhere. 



The great gorge running west from Lake Webster, half 

 a mile into the hills, shov/s most typically the sculpturing 

 work of the glacier. It is decidedly U-shaped, with sides 

 rising 1,000 feet nearly sheer, and it finally ends in a per- 

 fect cirque over which the outlet from some of the tarns 

 and Lake Newdegate falls in cascades hundreds of feet in 

 height. 



Passing from Lake Webster to Lake Seal, you rise 200 

 feet in under half a mile. The surface of this ri^e con- 

 sists entirely of glacial till, which runs out in a ridge or 

 series of ridges already mentioned lying between Lake 

 Webster and Lake Seal. This rise is probably a great 

 moraine blocking the Lake Seal Valley completely, making 

 the floor of Lake Seal on approximately the same level 

 as Lake Webster. This could only be verified by soundings, 

 and if it is not the case. Lake Seal could only be a won- 

 derful example of hanging and overdeepened valley, but 

 this latter view is unlikely. 



Following up the outlet of Lake Seal, just after leav- 

 ing the shore of Lake Webster, you cross a large trans- 

 verse ridge of morainal material, through which the stream 

 from Lake Seal has cut, and behind which riin tributary 

 streams. Past several more ridges the ground rises 

 abruptly to the shore of Lake Seal. This slope consists 

 of glacial till containing boulders of all sizes, set in red 

 or brown earth and gravel, the typical decomposition pro- 

 duct of diabase. Huge boulders rest on the surface of this 

 lying tilted at the angle of the slope, evidently toppled off 

 the edge of the glacier, melting just above, at the present 

 shore of the lake. The outlet of Lake Seal falls over this 

 moraine in a series of pretty cascades, and has cut a small 

 valley in the glacial till, but nowhere in its course can solid 

 rock be seen. The glacier was not confined to the gully 

 of this outlet, but spread at least 400 yards wide right across 

 the valley of the lake, and thus swung round into the 

 Broad River Valley. 



