. The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . 36 Stanford^ Geog^ THE TANGANYIKA PROBLEM. 49 succession of ridges, or to a succession of cusps in trans-verse section, and, when closely compared with the crosssection of Nyassa, the structure of the Great Central Rangein the region of the south end of Tanganyika will be foundto have the following peculiar features :—There are, first,two lines of up-push, one on either side of Lake Rukwa,then a more or less flat space, then a greater upraised ridgefl
. The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . 36 Stanford^ Geog^ THE TANGANYIKA PROBLEM. 49 succession of ridges, or to a succession of cusps in trans-verse section, and, when closely compared with the crosssection of Nyassa, the structure of the Great Central Rangein the region of the south end of Tanganyika will be foundto have the following peculiar features :—There are, first,two lines of up-push, one on either side of Lake Rukwa,then a more or less flat space, then a greater upraised ridgeflanking the eastern shores of Lake Tanganyika ; next thereis the depression of Tanganyika itself, and then another up-raised ridge. In Nyassa the phenomena would be produced,as we have seen, by a double fold in the earths surface, likethat which can be made in a sheet of paper, while in theregion of the south end of Tanganyika the whole of thephenomena are at once intelligible, if we suppose that fourwrinkles, four such folds, have been upraised. These arenot fanciful comparisons, but appear to me to represent, inreality, exactly what has actually taken pl
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