60 



other side in a much disturbed condition: dip S. 20'' E. at 

 from 40° to 50^ 



On the next flat (and, apparently, on the rise to the 

 west) there is a thick limestone with concentric structure, 

 in an outcrop of about 200 yards. This bed is underlain by 

 rotten shales, seen in a small quarry on the top of the rise 

 on the road, above the township, with a dip N. at 45°. On 

 going down the slope to Blinman there are evidences of 

 dolomitic limestones, which probably may be correlated with 

 a similar bed at the mine. 



VI. Trip to Patawarta Hill. 



Patawarta, as seen from Blinman, looking northwards, 

 has the appearance of a great wedge-shaped pinnacle, rising 

 conspicuously above all the surrounding hills, being the 

 highest point of a bold range of quartzite having its scarp 

 face to the south and dip slope to the north. Mr. J. V. 

 Whyte, of Angorigina Station, kindly drove me out a dis- 

 tance of 12 miles to visit this interesting hill, which official 

 Survey Reports state to be 3,060 ft. in height. 



The road lay through the Nildottie Gap, up the valley 

 of the Artimore Creek, past Artimore Head Station, and 

 over the shoulder of the Patawarta Hill, on its western side. 

 The journey took in country seen to the north on my trip 

 to the Willigon Creek. 



At the base of the hill, on its southern (scarped) side, 

 there are calcareous shales and thin limestones, in vertical 

 position, having a strike E. 20° N. Thin beds of quartzite 

 follow, divided by partings, or thin beds of purple shales, 

 with gradually lowering dip, at 85°, 75°, 65°, 45° N., a few 

 degrees E. Tlie hill itself is a mountain of almost solid 

 quartzite, which, near the summit, has a dip N. 10° E. at 23°. 

 The stone is softish to hard, siliceous, and, in colour, white 

 to reddish. About half-way up, the quartzite contains a 

 number of siliceous concretions, in the form of balls, ranging 

 in size from that of marbles up to cricket balls. These have 

 a rounded or flattened shape, sometimes possessing an 

 equatorial ring, and are harder than the matrix in which 

 they occur. The great hill is almost bare of vegetation (see 

 Howchin's ''Geology of South Australia," fig. 49, p. 66). 



A course was followed over the western shoulder of the 

 hill and through a gorge on its northern side, where the 

 quartzite showed a dip N. 10° W. at 27°. The path was 

 followed for about 2 miles over the saddle and through the 

 foot hills on its northern side. A magnificent view of the 

 country lying to the north was obtained from this vantage 

 ground. Immediately in front was a flat, about 2 J miles 



