237 



named composed of glacial sandstones and pebbles (plate 

 xxxvii.) : and a similar ridge occurs on the south side of Cle- 

 land's Gully, forming the dividing line between the Hun- 

 dreds of Nangkita and Goolwa. Looking to the south, the 

 same kind of country fills the whole field of vision, rising in 

 successive ridges up to 200 ft. in height. The main South 

 Road follows the low ground between the ridges and passes 

 over the saddle of one of these into the Hundred of Goolwa. 



It was on the northern slopes of this dividing ridge, not 

 far from the highest point on the road, that I obtained the 

 first unquestionable proofs of glaciated stones within the 

 area. On the western side of the road, occupying the slopes 

 of the hills, a succession . of shallow quarries occur. The 

 stone is a fairly hard, gritty sandstone, with pebbles irregu- 

 larly scattered through the finer matrix (plate xxxviii.). The 

 included stones consist mostly of rounded quartz and quartzite 

 of varying sizes up to 2 ft. in diameter. A few granite 

 erratics, from 9 to 12 in. in diameter, were noted; but these 

 were in a rotten condition and disintegrating. The included 

 stones are, for the most part, of an exceedingly hard type, not 

 easily scratched, but are frequently polished, some very highly 

 so. Several were found with one or more faceted surfaces 

 forming angular boundaries with the rest of the stone, and 

 one or two carried distinct glacial striae (plate xl.). The 

 quarries are worked in successive steps or platforms, giving 

 a maximum height of about 12 ft., but in all cases the floor 

 was in the same class of rock which to all appearance went 

 down indefinitely. The beds showed a dip slope of 15° to the 

 north-east, which accorded with the general slope of the hill- 

 side. The stone is worked for road metal — a stretch of several 

 miles of the main road is entirely maintained by the applica- 

 tion of this material. The stone is exactly similar to that 

 obtained from the Government Quarry, Wood's Creek, near 

 Yankalilla, which is also utilized for a similar purpose 

 throughout that district. 



The glacial beds pass southwards into the Hundred of 

 Goolwa, "occupying the upper part of the Currency Creek 

 basin. Their southern limit, in that direction, appears to be 

 where the most southerty branch of Currency Creek cuts the 

 main road, about seven miles from Mount Compass township. 



The westerly limits of the Mount Compass basin are de- 

 termined by a ridge which forms the watershed of the country, 

 as well as the dividing line between the Hundreds of Nangkita 

 and Myponga. This ridge, except where the older rocks form 

 inliers, consists of the upper members of the glacial beds which 

 pass over into the Myponga district and form the prevailing 

 geological deposits of that Hundred. Near the upper part 



