468 Transactions of the South African Philosophical Society. 



Pilgrimsrest und De Kaap " (Transvaal). Zeitschrift fur 

 praktische Geologie, Jan., 1897, S. 12-25 (with geol. map and 

 section of the De Kaap district). 



The conglomerate is described from hand specimens and 

 sections, and the theories as to the origin of the gold stated — 

 the author giving as the most probable the view that the gold was 

 introduced by percolating metalliferous solutions. He regards 

 the various igneous intrusions as an accompanying phenomenon 

 and an assisting cause. The influence of these igneous rocks is 

 treated at some length, and is supported by the parallelism 

 which exists between the copper-bearing conglomerates of 

 Lake Superior and the gold-bearing conglomerates of the Band, 

 as well as by the effects of eruptive rocks in the Lydenburg 

 district, more especially at Pilgrim's Rest. The dolomite of this 

 locality is compared with the galena deposits of Derbyshire, 

 where the influence of igneous intrusions on the metalliferous 

 deposits has never been doubted. , 



The Pilgrim's Rest gold-bearing quartz-reefs in the dolomite 

 are described in some detail, and sections given showing the 

 succession of dolomite and " Trap." 



The account of the De Kaap fields is accompanied by a map 

 of the district, and deals with various auriferous properties, 

 especially the Sheba Mine, of the working of which a short 

 history is given. 



G. S. C, 



Bain, A. S. " Reminiscences and Anecdotes connected with the 



History of Geology in South Africa, or the Pursuit of Knowledge 



under Difficulties." Trans. Geol. Soc. South Africa, vol. 



hi., 1897, pp. 59-75; reprinted from the Eastern Province 



Monthly Magazine, September, 1856. 



E. H. L. S. 



Carkick, J. T. "On Faulting along the Main Reef Line." Trans. 

 Geol. Soc. South Africa, vol. hi., 1897, pp. 39-41, with diagram. 



Where the dip is steep, from 40° to 80°, reverse faulting 

 occurs, due to intrusion of dykes ; where the beds dip from 

 30° to 40°, normal or reverse faulting may occur ; where the dip 

 is under 30° normal faulting alone occurs, due to subsidence. 

 The Rand beds cannot have been upheaved ; for if they had 

 been the reversed faults would dip towards an axis of upheaval, 

 which they do not. 



