570 Hefietvs — Geology of the Cape of Good Sope. 



Acting Geologist, with a field staff consisting of Messrs. E. H. L. 

 Schwarz and Alex. L. du Toit ; while Miss M. Wilman acts as 

 Museum Assistant. 



The field work for the two years embraced by the Reports chiefly 

 lay among rocks ranging in age from the Karroo formation upwards, 

 the older rocks forming in proportion only a small amount of the 

 area examined. The account of the Karroo beds, with their 

 numerous and peculiar reptilian remains, and the great extent of 

 the volcanic and igneous activity displayed, affords interesting 

 reading. Very suggestive, too, are the remarks by Mr. Schwarz on 

 the lavas of the Drakensberg and on the line of volcanoes trending 

 parallel with the eastern coast, implying a line of weakness and an 

 axis of folding in this direction. He naturally concludes that the 

 shelving sea-shores at present existing off the southern coast may 

 be explained by the gradual sinking of the sea-bottom without 

 rupture, and that there is no necessity to invoke the aid of great 

 faults. 



The Cretaceous rocks and Superficial Deposits are carefully and 

 fully described, while questions of economic importance receive due 

 attention. A petrological account of the Kocks of Matatiele, by 

 Mr. Schwarz, accompanies the Report for 1902, and the geological 

 maps of parts of the Division of Matatiele and of the Igneous Rocks 

 of Kentani, though somewhat roughly reproduced, will be found 

 a distinct addition to the Reports. 



It is a matter for congratulation that the fossils collected since the 

 commencement of the Survey are in the hands of specialists, and 

 that the descriptions are to be published in a special volume of the 

 Annals of the South African Museum. We hope that good 

 figures will accompany the descriptions. 



The Report for 1901 contains an account of a journey from 

 Swellendam to Mount Bay ; a general survey of the rocks in the 

 southern part of the Transkei and Pondoland, including a description 

 of the Cretaceous rocks of Eastern Pondoland ; and a Geological 

 Survey of the Division of Kentani. The work, owing to the war, 

 had to be carried on in the native reservation, instead of being 

 continued in the Western Provinces, and this somewhat breaks the 

 thread of previous Reports. The results obtained are, however, of 

 considerable interest. The account of the igneous intrusions in 

 Pondoland deserves especial attention, more particularly the 

 following passage : — " Along the banks of the Great Kei River, 

 north of the Bridge, there are some very fine examples of the 

 laccolitic form of intrusion of the dolerite, but what strikes one at 

 once is that the sedimentary rocks do not seem to have been arched 

 up over the dome-shaped masses of igneous rocks ; the contacts are 

 not well shown, but it certainly looks as if the strata had disappeared 

 in the space occupied by the igneous rocks, and the ends of the beds 

 seem to abut against the rounded contours of the dolerite, a fact 

 which we again and again noticed throughout the Territories, 

 and which was beautifully shown in the sections of actual contacts 

 along the Kentani coast." 



