193 



southward, in the same direction as the dip seen in Dinham's 

 quarry, and therefore should bring the grits below the 

 limestones. 



2. Cane's Quarry. Situated 3^ miles north of Ardrossan, 

 in the north-west angle of Section 95 (Hundred of Cun- 

 ningham). The quarry, which is worked for building stone, 

 is on a low ridge that crosses the east and west district road 

 from Tiddy Widdy. The outcrops can be seen on both sides 

 of the road, and covering these, at a slightly higher level on 

 the western side, the ground is strewn with nodular travertine. 

 The quarry stone is very siliceous, variable in the grain, regu- 

 larly bedded, sometimes cross-bedded, more or less laminated, 

 especially near the surface. It is roughly jointed in vertical 

 or slightly oblique directions. The exposed quarry face 

 measures 10 feet in height and the bedding has a dip to north- 

 east at 15°. 



3. Whittaker's Quarry. This is situated 4 miles in a 

 direct line to the north-west of the preceding example, in 

 Section 151, on the northern side of the east and west district 

 road and nearly opposite Mr. Whittaker's house, which was 

 built from this quarry. The outcrop is on a slight rise in 

 the ground. The stone exposed in the quarry is 5 feet in 

 thickness, whitish in colour, and of a gritty texture, in- 

 cluding fragments of felspar. No dip could be recognized. 



4. Winulta Creek. There is a great development of the 

 Cambrian basal grits on the borders of the Hundreds of 

 Cunningham' and Tiparra, the most extensive se^n in the 

 district. The Winulta Creek is a wide, open waterway, with 

 the Pre-Cambrian rocks forming the floor and lower slopes, 

 on either side, and the Cambrian grits forming cappings on 

 the higher ground. On the southern side of the valley, not 

 far from the public school, and about 30 feet from the 

 bottom of the valley, a quarry (Short's) shows coarse grit 

 passing into conglomerates having a 3-feet face of stone. 

 Angular surface stones, of the same kind, mixed with 

 travertine can be traced to the top of the rise. 



On the north side of the valley, at the same place, a 

 prominent spur marks a strong outcrop of the beds on that 

 side, estimated to be 50 feet in thickness. Conglomerates are 

 interbedded with the grits (pi. xx.). Almost all the in- 

 cluded stones consist of quartz, which are rounded and reach 

 a maximum size of hen's eggs. There is only a small pro- 

 portion of cement between the stones, which, however, is 

 strong. The beds continue as a capping to the ridge for a 

 considerable distance and produce some very broken and 

 rough ground. A very large block on the summit gives a 

 dip of 20° to the south-south-west, but I doubt whether 



H 



