THE KARROO SYSTEM 



185 



Between Van Wyk's Vlei and Calvinia the direction 

 of the movement is not known, but the " striated-pave- 

 ment " at Eland's Vlei in the Tanqua Karroo indicates a 

 flow of ice from the west. 



FIG. 12. Map showing the direction of the Ice-movement during the 

 Dwyka glaciation. The arrows mark the positions of observed glaciated 

 surfaces. 



In Natal the glaciated surfaces indicate a movement 

 from the north-north-west and the same is the case 

 in the Central and Eastern Transvaal. The ice sheet 



