

INTRODUCTION 



19 



ms ** 



G& 



" 



ably upon the Table Mountain series (see Fig. 3) ; the 

 accounts of the geology of Natal show that the same 

 condition obtains there, and also that the Table Moun- 

 tain sandstone (Palaeozoic sandstone of Anderson) be- 

 comes thinner as it is followed 

 northwards, and finally disap- yj 

 pears, so that the Dwyka series 

 rests directly upon rocks of Pre- 

 Cape age. The relation of the 

 Dwyka conglomerate to the 

 Table Mountain sandstone in 

 Pondoland is thus just like that 

 of the same two series in the 

 Bokkeveld Mountain north- 

 east of Van Rhyn's Dorp. 



If we imagine the country 

 between Karroo Poort and the 

 latitude of Van Rhyn's Dorp to 

 be removed from observation, 

 we have a nearly similar con- 

 dition of things on each side of 

 the folded belt, extending from 

 Karroo Poort to the Gualana 

 River, but the relatively raised 

 block of the Gates of St. John's 

 has no analogue in the west. 

 The gradual flattening out of 

 the folds northwards of Karroo 



Poort has no obvious counterpart in the east of the 

 Colony, simply because the area in which a similar 

 change takes place is under the sea. There is no 



a & s 

 2 .s a. 



II 



