. The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . c h < 7. LAKE TANGANYIKA. RUSI Birds- cc page 83. DWIGHT W. TAYLOR THE TANGANYIKA PROBLEM. 83 on the Rusisi River, matters change; the floor of thevalley rises rapidly, for some 2,300 feet, and the risingground is composed of old folds of gneiss and schist,covered with deep red soil, and against which the modernlake deposits to the south, finally terminate. Upon thesegneissic ridges there is no trace of any lake-deposit orstratified material of any kind, and the g
. The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . c h < 7. LAKE TANGANYIKA. RUSI Birds- cc page 83. DWIGHT W. TAYLOR THE TANGANYIKA PROBLEM. 83 on the Rusisi River, matters change; the floor of thevalley rises rapidly, for some 2,300 feet, and the risingground is composed of old folds of gneiss and schist,covered with deep red soil, and against which the modernlake deposits to the south, finally terminate. Upon thesegneissic ridges there is no trace of any lake-deposit orstratified material of any kind, and the great valley ofTanganyika is here, in fact, to a large extent filled up, butit is not actually obliterated. The flanking ranges could,as a matter of fact, be seen to continue east and westof us as we approached the southern extremity of LakeKivu, at which point the floor of the great centraleurycolpic fold begins to sink again. At present, the waterof Lake Kivu stands at an altitude of 4,801 feet, and theoutflow of the lake rushes away to the south in a whitelace-work of foam, through a gorge in the hills as theRusisi River, which in turn falls in a su
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