GEOLOGY. 165 



The average level of the hills of the Victoria 

 region seemed to me to be from 4,100 to 4,300 

 feet above the sea. But on mounting the rivers 

 which enter the Victoria Nyanza, the average 

 level both of the river valley and, in a less marked 

 degree, of its neighbouring hills, rises considerably, 

 and the latter may nearly reach 5,000 feet. 



Over the whole of this region there is very 

 rarely anything to be seen but gneiss rock and 

 laterite. There are, however, in places deposits 

 of iron, which occur in sedimentary rocks, probably 

 of a recent age. 



I noticed such ironstones at the following 

 places : — Berkeley bay station, near the Seki- 

 bobo's town in Uganda (Koki was not seen by 

 myself), and Tiasimbe. At Berkeley bay these 

 iron pockets occur in a patch about 40 yards in 

 diameter at the foot of the Samia hills, and I 

 thought they formed a syncline as shown on the 

 sketch (see Fig. 9, p. 38). They also occur at two 

 if not three places further along the shore of the 

 Nyanza. I estimated roughly the thickness of the 

 beds to be 200 feet, and the strike to be N.N.B. 

 and 8.S.W. (see chapter hi. p. 39). 



It is possible that these gneisses are not uni- 

 formly spread over the whole area mentioned 

 above ; Captain Lugard gives mountains from 

 4,600 to 5,000 feet between the valleys of the 

 Katonga and Euizi rivers, which appear to sepa- 

 rate the Kyojia and Eusanga watersheds. 



