194 



this is true dip, and may have arisen from a slide, or other- 

 wise an uneven floor on which deposition took place. 



The same remarkable conglomerate is seen on the next 

 spur of the hills, about half a mile to the north-west, where 

 it is of considerable thickness and makes a very rough and 

 broken outcrop. Further up the rise is a quarry (also 

 Short's) which is about 120 feet above the creek level. The 

 stone is a gritty sandstone similar to that on the southern 

 side of the valley, containing much felspathic material, and 

 the dip in this quarry is apparently in the form of a shallow 

 syneline. The stone used in the building of the Winulta 

 school -house was obtained from the two quarries referred to. 



The unconformity between the Pre-Cambrian complex 

 and the overlying Cambrian grits in this neighbourhood is 

 very distinct. 



5. East of Winulta. The basal grits show again on the 

 north and south road that divides the Hundreds of Tiparra 

 and Clinton. At a point, little more than a mile to the 

 northward of the south-east angle of the Hundred of Tiparra, 

 the beds outcrop, close to the road, on Section 356. 



6. Weetulta. A Government bore put down on Section 

 342 (Tiparra), situated about 16 miles to the westward of 

 Winulta, gave the following section: — 



ft. in. 

 Surface soil and limestone ... 4 



Red clay ... 16 6 



Indurated gravel (basal grits) 15 6 



Granite 76 9 (hot bottomed) 



7. Three miles west of Ardrossan, on the Maitland Road. 

 The basal grits outcrop in Sections 41 and 80 where they 

 cross the Maitland road as a low ridge in a north-east and 

 south-west direction. The outcrop is almost even with the 

 surface of the ground, covers a wide area, and exposes stones 

 of large size. The adjacent land carries a light soil more 

 or less strewn with nodules of travertine limestone. 



8. Wundersitz's Quarry. This is a well-known quarry, 

 situated on the western flanks of the Yorke Valley (eastern) 

 ridge, 14 miles west of Ardrossan and 2 miles east of Mait- 

 land. It is within about 200 yards of the well sunk in mica- 

 schist (mentioned on page 190) near Mr. Wundersitz's house. 

 The quarry has a wall-face of about 10 feet in height, and 

 the beds have a gentle roll with a slight dip to the west. 

 The stone is usually coarse and gritty with a considerable 

 quantity of fragmental felspar, which sometimes gives colour 

 to the stone, which is white to reddish. The grit is said 

 to rest on a reddish, sandy, and kaolinized clay, which has 

 been proved by boring to be at least 6 feet in thickness. This 



