TERTIARY AND RECENT DEPOSITS 



375 



North of the Zwartebergen the gravel-covered ter- 

 races and plateaux are almost as well developed as they 

 are to the south of that range. Near Laingsburg the 

 highly folded Witteberg and Dwyka beds have been cut 

 to a common level by the Buffel's River and its affluents 

 at a period when the main stream flowed some 300 feet 



PLATE XXIII. High-level gravels lying unconformably upon inclined 

 beds of Uitenhage age (Enon type), Paarde Kloof, near Tover Water 

 Poort, Uniondale. 



above its present bed, and the surface of the terrace is 

 strewn with gravel and alluvium. Similar features oc- 

 cur along the northern flank of the range at least as far 

 as Prince Albert, where there are also some fine table- 

 shaped and gravel-capped hills lying considerably to the 

 north of the mountains. 



In the neighbourhood of Grahamstown the gravel 



