202 Transactions. 



anticline. Near the town it is found dipping west at an angle 

 which appeared to be about 45° in the mine seen by me ; on the 

 Nooitgedacht property on the other liand, about 3 miles off, it is 

 found dipping east at from 12° to 60°. 



At Johannesburg I was, after much difficulty, able to visit the 

 Weinmer and Ferreira properties. Here the accompanying rocks, 

 chiefly schists, a very hard limestone, and sandstones, dip south at 

 a very high angle, usually about 80° (though in places only 45°). 

 In the properties I saw there were about 7 of these belts of con- 

 glomerate interbedded with sandstones and usually 2 or 3 feet 

 thick ; a thin belt of sandstone is interleaved with one of these 

 belts of conglomerate. The few inches of sandstones in contact 

 with the conglomerate are hardened slightly, and also contain gold. 

 It is said that this conglomerate has been traced to Klerksdorp 

 from Johannesburg, and it is also said that banket exists at 

 Amsterdam considerably to the west, but I could not verify these 

 statements. 



From the manner in which it occurred with sandstones it can 

 scarcely be doubtful that it is an ordinary water-formed con- 

 glomerate. (Mr Ballot of Rolfontein showed me a small shell 

 embedded in banket which would of course prove this.) It 

 has in all probability been formed along the shore of some great 

 inland sea, and its position both in time and space are in favour of 

 the existence of such an inland sea as that mentioned above. I 

 found the strata to the North of Pretoria at the Macaliesberg 

 Mountains again dipping north, which if I was right in recognising 

 some of the Johannesburg rocks would prove that banket should 

 exist somewliere near. 



A series of sandstones and coalmeasiires ovei'lie the primitive 

 auriferous rocks over a large area. Instead of being inclined at a 

 high angle, they are horizontal or slightly folded. The coal is 

 found and worked at Boksburg, twelve miles from Johannesburg. 

 I again saw it worked at Middelburg, and further south at Errnelo. 

 The whole country from Middelburg to Lake Chrissie and thence 

 some distance to the south of Errnelo consisted of these sandstones 

 and coalmeasures. The coal lies close to the surface, and the 

 district being conveniently cut up into small valleys, one often 

 finds the coal cropping out in the bed of the streams. 



