Glacial Conglomerate in the Table Mountain Series. 



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been ascertained on the Pakhuis Pass, at Bosch Kloof, and on Klein 

 Vley, while a considerable thickness of the upper sandstones over- 

 lies the shale band at all the localities. 

 The reappearance of the conglomerate ** 

 on the downthrow side of the Augsburg 2 

 fault most decidedly confirms the con- 

 clusion that the rock belongs to the 

 Table Mountain series. 



Though there is a certain resemblance 

 between the Pakhuis and Dwyka con- 

 glomerates there are important points of 

 difference. The Dwyka conglomerate is 

 remarkable amongst other things for being 

 so constant in colour and appearance 

 throughout a great region, with one 

 general distinction between the northern i 

 and southern outcrops, due to the greater 

 amount of alteration induced by earth- ]' 

 movements in the south. Now the J 

 Pakhuis conglomerate varies considerably 

 even within the short range of twenty- i 

 three miles through which it has been 

 traced. The red rock at the base of the 

 Klein Vley outlier has no counterpart in 

 the Dwyka conglomerate. 



The variety of rocks occurring as 

 boulders and pebbles in the Pakhuis 

 conglomerate is considerably less than 

 in the Dwyka, and quartz, quartzites and 

 sandstones are more abundant in pro- 

 portion to rocks of igneous origin in the 

 former than in the latter. There is one 

 peculiarity, in addition to the glacial 

 striations, common to the boulders of the 

 two conglomerates : many of them are 

 traversed by several parallel planes along 

 which they break easily," and those 

 planes are independent of the original 

 structural planes of the rocks from which 

 the boulders were derived. In each of ... 

 the outcrops of the Pakhuis conglomerate "*" 

 these jointed pebbles can be found, and it ^ 

 was noticeable that the elongated pebbles were more frequently 



* See Schwarz, Trans. Phil. Soc, vol. xiv., p. 385, 1903. A figure of a jointed 

 boulder from the Dwyka conglomerate of Prieska is given there. 



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