THE KARROO SYSTEM 203 



The Lower Beaufort Beds. In the Northern Karroo, in 

 Philipstown, Victoria West, and Carnarvon the blue 

 flaggy shales of the Ecca are followed by massive yellow 

 weathering sandstones ; this change from an argillace- 

 ous to an arenaceous formation is quite abrupt. The 

 base of the sandstones has been taken to mark the base 

 of the Beaufort series, and this divisional line is also 

 found to hold good near Calvinia and in the Koggeveld 

 (Fish Kiver Valley). South of the Eoggeveld the Ecca 

 beds become more arenaceous, but the approximate 

 junction has been traced round the Klein Eoggeveld, 

 and through the Moordenaar's Karroo and Gouph, 

 while in Prince Albert the base of the Beaufort has 

 been taken at the lowest stratum containing the re- 

 mains of Pareiasaurus. The exact limits of the forma- 

 tion east of Prince Albert is not known. Near Aberdeen 

 A. H. Green J described an apparent unconformity which 

 may possibly be at the base of the Beaufort, while 



s. N. 



Wittebergen Klein Roggeveld 



Jt 

 3. 



FIG. 14. Section from the Wittebergen to the Klein Koggeveld, from 

 the folded belt to the Karroo basin. Distance about 13 miles. Vertical 

 scale T V in. to 1,000 feet. 



1. Witteberg series, t Upper shales (6) 



2. Dwyka series. J Tillite. 



t Lower shales (a). 



3. Ecca series. 



4. Beaufort series. 



Pinchin 2 records a marked unconformity north of Port 



1 A. H. Green, Report on the Coal-fields of tJie Cape Colony, Cape 

 Town, 1883, p. 25. 



3 B. Pinchin, Q. J. G. S., xxx'u, PI. IV., p. 106, 1875. 



