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 hand, 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 somewhere near. 
A series of sandstones and coalmeasures overlie 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, 
a 
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