• ■ ■ v"^/Vvv^-V,- 





< 





"^ y y"" 





^^^^ 



S3 



ALhtvuinv. 



Old lahe-deposits . 



yb Iconic. 



Red^ FelspaiMc Grits. 



Metcarwrphosed Rochs. 



GranUxiid fArcJuBan.) 



U:^. 



X 



:M^ 



0^ 



R.^m 



.^/ 



4 



Mpala 



5" 



•r>- 



^ 



Crcneralized Geological sketch-map of 

 Lake Tanganyika and its surround- 

 ings, based upon the researches of 

 Moore, Ferguson, Co7-net, Barrat, 

 Kohlschiitter, &^c. 



N.B. — The orientation of the Lake 

 itself represents the principal Grabeti: 

 this is continued north2ua?-ds up the 

 valley of the Ruzizi. The longitudinal 

 slices included betiveen the broken 

 lines, are intended to represent sub- 

 sidiary Graben. 



9 



,,/ 



■m 



%yj^ 



29° 



30' 



31° 



