106 





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I— 1 a; ti'^ 



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53 ^. QJC^ 



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interferes with the occurrence of the thick ^ 

 quartzite along the ridge of Anstey Hill, g g'S'.J 

 cutting out the formation entirely to the S^S ^^.h- 

 south, and, according to Mr. Howchin, i^2 2L|ijQ' 

 repeating the whole formation in a band -- S S-S" 

 which runs in front of the Torrens Weir '^"" ^_^ 'i 

 northwards along the face of the range, m- j^g O 

 In this portion the rock is very twisted, gr g"^^§ 

 dips to the west being recognizable, g m H' " 

 though those to the east predominate. ra"(j^ 5 S ^ 

 This long fault line to the east of the ^--2-7^^ 

 quartzite is sharply marked by difference %':^: '— sj"„ 

 of vegetation for three or four miles from g^os^e-n 

 the Torrens since the shale has been 

 cleared, while the quartzite remains scrub- 

 bily timbered. A small quarry in Water 

 Gully below the Anstey Hill road shows 

 the fault rather well marked. The quartz- 

 ite does not continue south of the Torrens, 

 but bends to the west, or is terminated 

 by a cross-fault. The Torrens bends 

 round the southern end of the quartzites. 



To the north-west of the map there are 

 two cross-faults displacing and tilting the 

 strata as shown. It seems exceedingly 

 probable that the junction between Cam- 

 brian and Pre-Cambrians is here along a 

 fault line. 



The blue metal limestones run from 

 the Torrens Valley northwards to the 

 Teatree Gully Road, and occur again on 

 the Little Para on Section 5568, Hundred 

 of Yatala, where they dip to the east at 

 65°. 



Tertiary. — After lower Cambrian times 

 no age has left a record till we come to 

 late Tertiary. Here two series of gravels 

 were formed. One occurs capping the 

 hills that overlook the Torrens. It is a 

 hard ferruginous gravel with rounded 

 quartz pebbles. Its occurrence is quickly 

 recognized by the poor Xanthorrhoea 



vegetation which it supports. It forms quite the highest 

 land about. It is continuous with and doubtless belongs to 

 the same series of gravels as those of Barossa. 



Flanking the scarp of the range and running north from 

 Anstey Hill to beyond Teatree Gully is another series of 



m 



