535 



:'-o 



:ttj 



Robertson. This well passed through 

 about 60 feet of Enon Conglomerate, 

 and a fine typical collection of pebbles 

 could here be examined in detail. 



The general structure of this district 

 is simple, but of considerable interest; 

 and its principal features can be made 

 out from an inspection of the small map 

 (fig. 3, p. 722). At Kogmans Kloof 

 there is a noticeable kink in the general 

 trend of the Langebergen Range, and 

 this kink is accompanied by what 

 appears to be a thrusting forward of the 

 Cape rocks towards the south-west. On 

 the right bank of the river, just below 

 the mouth of the pass, the Enon Con- 

 glomerate appears to be in contact with 

 Table Mountain Sandstone ; but, un- 

 fortunately, it is impossible to determine 

 what underlies the conglomerate at 

 this point. There can, however, be no 

 reasonable doubt that here, as elsewhere, 

 it rests on Witteberg Beds : this question 

 will again be referred to later. The 

 position of this mass of Table Mountain 

 Sandstone is doubtless due to two 

 nearly parallel faults, the more important 

 running nearly along the line of Kog- 

 mans Kloof towards Montagu, while 

 the second follows closely the line of 

 the upper part of Wild Paarde Kloof 

 and crosses the Keisies River to the 

 north-west of the farm Uitvlugt. These 

 are tear-faults, and between them a 

 block of Table Mountain Sandstone about 

 2 miles wide . has been pushed nearly 

 a mile to the south-west. This faulting 

 is of earlier date than the Enon Con- 

 glomerate. 



The banks and bed of the Kogmans 

 River, from near Ashton Station to the 

 mouth of Kogmans Kloof, afford a very 

 clear section in which the relations of 

 the different rock-groups can be made 

 out with certainty. This is illustrated 

 by fig. 4. The Enon Conglomerate, 

 when best exposed for a thickness of 

 about 40 feet, consists of large rounded 

 and subangular boulders embedded in 

 a red sandy matrix: it shows distinct 

 bedding, with a gentle dip to the south. 

 On the left bank of the river it is 

 clearly seen lying on "Witteberg Beds, 



