82 



flooded creeks, and they seldom extend beyond a few hundred 

 yards from the mountain-slope from which they have been derived. 

 River-formed gravels of some extent occur in Moses Creek at 

 Skirmish Hill, and near Fort Mueller in the Cavenagh Range. 



Clay-pans are very scarce in this country. A few of very 

 limited area were observed inside Cavenagh Range, and near 

 Barrow Range. 



2. Pal.hozoic and Metamoepiiic Rocks. 



This formation constitutes the marf^uee-shaped hills* ; already 

 described as running almost parallel with the granitic ranges. 

 At Camp 11, where these rocks were lirst encountered, they are 

 about 40 miles distant from the nearest granitic upheaval, a dis- 

 tance which was also approximately ascertained by Messrs. 

 Lindsay and Helms and by Mr. Wells on their respective flying- 

 trips towards the south. There can be no doubt that these hills 

 are geologically identical with those to south and south-east of 

 the Bverard Range, and with the Townsend Ridges further west- 

 ward ; and it may be safely inferred that the same formation 

 composes the Warburton and Sutherland Ranges, although the 

 rock-specimens from the former, collected by Mr. Lindsay, are 

 not exactly the same as, whilst those frOm the latter, c(jllected by 

 Mr. Leech during a flying-trip to Gibson Desert, are similar to 

 those from the Townsend Ridges. 



The hills to the east and south east of the Everard Range con- 

 sist chiefly of cjuartzites and sandstones, with which are associ- 

 ated slate, limestone and gneiss. Specimens of all these were 

 brought back by Mr. Helms from his flying-trip to the south. 

 The marquee-hills consist cliiefly of apparently unfossiliferous 

 quartzites, but in a creek-bed, which occupies one of the valleys 

 among them, there occurs a gravel consisting of mica-schist and 

 gneiss, and though I did not succeed in finding these schistose 

 rooks in situ, yet there can be no doubt that they are component 

 parts of the Paheozoic formations in this region. Moreover in 

 Turban Hill the relation of the quartzite to the metamorphio 

 rocks is well-defined. The basal part of the section consists of a 

 metamorphic granite, a-nd the upper part of a quartzite, whilst 

 the intermediate beds show a passage from one to the other ; the 

 succession from below upwards is as follows :— Granite contain- 

 ing quartz-pebbles, a silico-feldspathic magma, changing into 

 quartzite, ferruginous quartzite, whitish-coloured quartzite. 



Two small outcrops of primary rocks occur, at ten miles east 



* Probably identical with the Tent-Hill formation of Mr. H. Y. L. 

 Brown, Government Geologist of S. Aust. See Report on the Geology 

 between Port Augusta and Eucla, 1885, p. 2. 



