﻿no 



PKOE. A. C. SEWAED AND ME. T. K". LESLIE ON" [Feb. TQoS, 



strata.^ The evidence furnished by the plants clearly points, how- 

 ever, to a Permo-Carboniferous age. Geologists are now agreed in 

 assigning the plant-beds to a sub-Triassic horizon ; but there is 

 some difference of opinion in regard to the choice between the 

 ^Middle or the Lower Karroo System. 



The Karroo System is much more completely represented in Cape 



Colony than in the Trans- 

 Fig. 1. — General section at vaal ; in the former region 

 Vereenigmg. [T. N. L.'] it is classified as follows by 



Snrface-soil. 



Mr. A. W Eogers - in his 



book on the Geology of 

 •^JiTcl'dtr Cape Colony:- 



Shales. 



Sandy shales 



Upper Karroo- 

 Middle Karroo 



-Storm berg 



Series. 

 — Beaufort 

 Series. 

 Lower Karroo — Ecca Series. 

 Dwyka Series. 



The Dwyka Conglome- 

 rate is thus separated 

 from the Ecca Series as a 

 distinct subdivision. By 

 some authors, as in the 

 ' Geology of South Africa,' 

 by Drs. Hatch & Corstor- 

 phine,^ the Ecca Series is 

 spoken of as including the 

 Dwyka Conglomerate with 

 the associated sandstones 

 and shales. Without ex- 

 pressing any opinion on the 

 evidence for the separation 

 of the Dwyka from the 

 Ecca Series as afforded by 

 tJie stratigraphy of Cape 

 Colony, we shall refer to 

 the Lower Karroo of the 

 Transvaal as the Ecca 

 Series. A reference to 

 the numerous papers of 

 recent years, which speak 

 well for the present geolo- 

 gical activity in South 

 Africa, shows that opinion 

 is divided as to the exact 

 position of the Yereeniging beds. The coal-seams at Yereeniging 

 are described by Dr. Hatch * as occurring in the lowest part of 



merging 



Sandstones 

 containing 

 plant-remains 



Carbonaceous 



Shale. 

 Grit. 



Coal. 



Carbonaceous 

 Shale. 



Coal. 



Stratified con- 

 glomerate 

 with Cordaites. 



Glacial 



Conglomerate. 



Dolomite 



(Potchefstroom 



Series). 



1 Draper (97). 



3 Hatch & Corstorphine (05) p. 19'; 



Eogers (05) p. 147. 

 Hatch (05) & (06). 



