THE CAPE SYSTEM 163 



quartzites, for the numerous shale bands are more easily 

 weathered away and can only be seen when one enters 

 a ravine or gorge, such as the Tra-Tra or Winkelhaak's 

 (Doom) Kiver valleys, which drain the Cold Bokkeveld. 

 The Zwart Ruggens merge into the Bonteberg Kange 

 at Karroo Poort, when the strike of the rocks changes 

 from south to east. The axis of the Bonteberg anticline 

 is inclined eastwards, so that the Dwyka series sends a 

 tongue west-south-west towards Pienaar's Kloof north 

 of Touw's River Station. The Witteberg beds are con- 

 tinued across Pienaar's Kloof into the Voetpad Berg, 

 and also round the south of the Quarrie Kloof Dwyka 

 outlier into the Wittebergen. In the southern part of 

 the Worcester Division the Witteberg beds form a V-- 

 shaped area ; the two arms of the V meet on the south 

 and are cut off by the Worcester fault to the north, but 

 the western junction is buried beneath the conglomerates 

 of the Uitenhage series ; the apex of the V is at Roode 

 Berg near the road between Villiersdorp and Worcester. 

 In Robertson the Witteberg beds form an area about 

 twenty-four miles in length, south of the fault ; and 

 they also occur in Swellendam and Riversdale. To the 

 north-east of Montague they form two synclines con- 

 nected at the eastern end ; Klein Berg is part of the 

 southern syncline, and the hills near Dobbel Aars Kloof 

 belong to the northern one. 



Between the Bonteberg and Matjes Kop these beds 

 cover a considerable area, over forty miles long and 

 twenty wide in places, being thrown into many small 

 folds, and in four of the synclines or troughs outliers of 



the Dwyka series occur ; the Nauga and Coega (or 



11* 



