96 W. G. WOOLNOUGH. 



In the small but very conspicuous hill shown on the map 

 herewith as "West Knoll," the dip is south 15° east at 35% 

 and the shape of the hill is very plainly influenced by its 

 structure, since there is a steep scarp towards the north 

 and a long dip slope towards the south. This dip slope 

 falls in a gentle curve towards the axis of the range and 

 then rises equally gradually towards the summit of "The 

 Wedge." This hill is almost the mirror image of West 

 Knoll possessing a precipitous scarp on the south and a dip 

 slope on the north. Curiously enough these two very con- 

 spicuous hills, which show the synclinal structure of the 

 range in a very striking manner are not indicated on the 

 Lands Department lithograph (No. 445). On the summit of 

 the Wedge the dip of the quartz schists is north 10° east 

 at 49°. A little further to the south-west, on the lower 

 slopes, the dip is about vertical, if not actually slightly 

 overturned and inclined to the south at a very high angle. 

 In the western foothills of this peak, a dip of south 10° east 

 at 28° was recorded in very much metamorphosed rocks. 

 The arrangement of the main beds of quartz schist as seen 

 in the western profile of the Wedge is very strongly sug- 

 gestive of the existence of a small normal fault throwing 

 in a southerly direction. It is obvious then that the 

 structure of this very remarkable hill calls for much more 

 detailed investigation than I was able to give it. 



Close to the junction of the two roads immediately south 

 of the entrance to The Pass, and just where the last out- 

 crops of quartzite are seen near the beginning of the sand 

 plain, the sediments appear to have a very persistent strike 

 in a direction north 70° east, with a nearly vertical dip. 

 As above noted, dip readings on the lowlands are very 

 uncertain and unsatisfactory. In this case, however, the 

 position, line of strike and apparent dip all conform so 

 closely with the structure of The Wedge and with the 

 remarkable south-eastern escarpment of the range that the 



