CHAPTEE X. 



THE CKETACEOUS SYSTEM. 



THE Cretaceous beds in Cape Colony are divided into 

 three main groups, the Uitenhage, Pondoland, and 

 Need's Camp series. The relative ages of these beds is 

 determined by their fossils, and they correspond re- 

 spectively to the Neocomian, Senonian, and perhaps 

 Danian series of the Cretaceous system. The Uitenhage 

 and Pondoland series have not been found in one and 

 the same area, neither are the Pondoland and Need's 

 Camp series known to occur together, but the Need's 

 Camp beds rest unconformably upon the Uitenhage 

 series in Alexandria. 



While the Uitenhage series covers rather wide areas 

 in the folded belt between the Karroo and the coast, 

 resting unconformably upon rocks of various ages from 

 the Malmesbury to the Ecca beds, the other two groups 

 are only known from the coastal belt between the 

 Sunday's River and Natal. 



1. THE UITENHAGE SERIES. 



In the typical area, the valleys of the rivers flowing 

 into Algoa Bay, this series has been subdivided into the 

 following groups : l 



1 This classification is substantially that of the late Dr. W. G. Ather- 

 Btone. 



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