REPORTS OF COMMITTEES. 269 



As these polished faces occur within a quarter of a mile of the 

 polished pavement in the Inman River, it is reasonable to conclude 

 that the glacial floor is continuous between the several exposures, and 

 gives the strongest evidence that the glaciating agent was land ice on 

 a very large scale. 



Strang way's Hill Spur. 



In taking the rise to Strangway's Hill, in section 122, morainic 

 material and large erratics are plentiful. Near Mr. Grossman's hut, in 

 the above section, are many granite boulders up to 8ft. in diameter. 

 One of these, 3^ft. long, is strongly glaciated ; and another, 6ft. by 6ft. 

 by 4ft. high, is a fine-grained granite with segregations of tourmaline 

 in globular masses, 2in. to 6in. in diameter. 



On the saddle of the range, near the head of the Duck's Nest Creek, 

 (referred to above), and slightly on the western side of the crest, are two 

 large boulders of granite resting on each other, the dividing plane 

 probably being a joint, which give a combined measurement of 7|ft. 

 by 6ft. by 5ft. high, resting on glacial sandy clay. The presence of 

 these unmistakable erratics in such a position is of great importance, 

 proving that the actual path of the glacial was over this high ridge. 



The summit of the range at the place where these evidences occur 

 is covered with a remarkable clay-sand deposit, which is disposed in 

 innumerable small hills and hollows, like graves in an extensive grave- 

 yard. The mounds are from 6in. to 12in. above the hollows. The 

 local residents have no knowledge of the origin of these mounds, and 

 the piece of country is known to them as " the Bay of Biscay." That 

 the material is of glacial origin cannot be doubted, but it seems ex- 

 tremely unlikely that superficial features of so perishable a nature could 

 have remained unaltered during the immense interval which separates 

 this glacial period from the present. 



Duck's Nest Creek. 



The Duck's Nest Creek, which is a deep gully on the western side 

 of the Strangway's Hill and Inman Hill, has been excavated in glacial 

 sands and clays which formerly must have almost filled the older valley. 

 Sections of these beds, in the form of finely laminated sandstones in 

 horizontal position, can be seen exposed in several places (Section 86). 

 Going up the creek, just over the fence (in passing from Section 87 to 

 120), a prominent rock arrests attention from its peculiar shape, suggest- 

 ing a roche-moutonnee. An examination shows that the rock is a rounded 

 mass of very hard quartzite, 60yds. in extent, with nearly vertical walls, 

 20ft. high on the side next the valley. The rock face, although mostly 

 covered with lichens, still preserves faint indications of striae that run 

 east and west in the direction of the curve of the valley at this spot, and 

 still more distinctly, both, poUsh and striae can be seen on the top of 

 this bared rock. A very large granite boulder is perched on this rounded 

 mass, measuring TJft. by 5ft., with several large blocks of similar stone 

 at the base of the wall face, which have evidently been broken from the 

 main mass. 



