The Holocene History of the Southern Lake Chad Basin: Archaeological, Linguistic and Genetic Evidence

Archaeological evidence indicates a complex history of settlement of the southern Lake Chad Basin from the mid-Holocene onward, in parallel with the gradual desiccation of the Sahara and reduction of lake and river systems in the region. These archaeological data can be compared with a growing body of data from historical linguistics and genetics, and the southern Lake Chad Basin is one of few areas in Africa where such comparisons can be undertaken. This paper will serve as a preliminary consideration of some of the issues generated by an initial comparison of archaeological, genetic and linguistic evidence for the peopling of the Lake Chad Basin. It focuses on the contexts of initial encounters between ancestral Nilo-Saharan and Chadic populations south of Lake Megachad and subsequent population expansions and diversifications around the Mandara Mountains.