100 W. G. WOOLNOUGH. 



point, the axis of which is roughly parallel to the disturb- 

 ance forming the south-east scarp of the range. It is 

 practically certain that the disturbance is a fault throwing 

 to the north, but no data are to hand to determine the 

 magnitude of the displacement. From the summit of the 

 ridge the zone of disturbance can be traced very clearly 

 down the western slopes of Toolbrunup into the depths of 

 Toll's Pass separating that peak from Talyuberlup and 

 Magog. In the rocky summit of Talyuberlup the beds are 

 decidedly wavy in structure. Just below the culminating 

 cliff a dip of south 8° west at 12° was recorded, while on 

 the summit itself, the dip is in the same general direction 

 but extremely gentle. Prom the summit a most interesting 

 field for investigation can be seen immediately to the south. 

 I was unable to visit it, but could detect the presence of a 

 considerable disturbance in the hill immediately south-west 

 of Talyuberlup, where there appears to be a very sharp 

 anticline. The north-western beds dip in that direction at 

 approximately 40°, while on the other limb of the fold the 

 dip is south-easterly at about 30°. The structure must be 

 merely local or else must have a steep pitch towards the 

 south-west, as the rocks in the next ridge to the south do 

 not appear to be affected. The view obtained by me was 

 not altogether satisfactory, as it was raining at the time, 

 and there is just a possibility that what I took to be an 

 anticline was really the intersection of a bed, dipping 

 steeply towards the north-east, with the convex contours 

 of the hill, but I strongly favour the first alternative. It 

 is worthy of note that this disturbed area is very nearly 

 on the line of strike of the fault plane postulated to the 

 south of Toolbrunup. 



In the cave under the summit of Talyuberlup consider- 

 able disturbance, in the nature of sheet faulting of the 

 beds, can be seen. This has given rise to overthrusts of 



