AJTD ASSOCIATED EOCKS OF THE SOUTHEEN TKANSYAAL. 437 



came were often to be seen covered with minute crystals of gold, and 

 in the pyrites it occurred in small plates on the cleavage-planes. The 

 gold might have been in the form of alluvial gold in the gravel-deposits 

 from which the conglomerates were formed, then dissolved, and re- 

 deposited in its present condition ; but its primary origin had still to 

 be accounted for. The fissure-veins in the granite, worked for copper 

 and silver at the Albert and other mines, had not been found hitherto 

 to carry gold in any considerable quantity. The gold must at one 

 time have been either created or evolved from something else : could 

 that not as well have happened in its present position as elsewhere ? 



Prof. Lapwoeth noted that the Author had had unlimited oppor- 

 tunities of doing work in the district described. Before he went out 

 it was believed that the district was a simple basin, the reefs mar- 

 gining the basin. The Author came to the conclusion that, whilst 

 it was just possible that it was really a simple basin, it was far 

 more probable that there had been overthrusting and shearing along 

 the edges of the basin, and possibly great repetition in its interior ; 

 so that these gold-bearing rocks might quite well be found eventually 

 within the basin itself. The Author certainly believed that the 

 beds were repeated again and again, and need be of no great 

 thickness. He knew that the Author had avoided giving any 

 definite idea in the paper as to the source of the gold, as he proposed 

 to treat of this subject in a separate memoir. 



Mr. Teall also spoke. 



