CHAPTER III. 



THE PBE-CAPE KOCKS OF THE NORTH OF THE COLONY. 

 1. THE KHEIS SERIES. 



IHE rocks of this series are known to form a broad 

 band running south-south-east from the neighbourhood 

 of Upington into the Prieska Division. Near the Orange 

 Eiver west of Ezel Rand there is a deflection towards 

 the north and north-north-east which carries a large 

 part of the group into the Kalahari north of Kheis. 



So far as these rocks are known at present they have 

 little resemblance to the Malmesbury series of the south- 

 west, but it is probable that the granite of Namaqua- 

 land is intrusive in the Malmesbury beds in the south 

 and in the Kheis beds in the north. It remains to be 

 proved, however, whether the great north-western mass 

 is of one age throughout. 



The series is divided into two sub-groups founded on 

 lithological characters and stratigraphical position. The 

 supposed lower group, the Marydale beds, occurs on the 

 north-eastern side of the ranges made of the supposed 

 upper or Kaaien beds, and fragments of it may perhaps 

 also be recognised in certain highly metamorphosed 

 rocks found in the gneiss on the south-western side of 

 the ranges. 



