Nilo-Saharan
•The notion that there is a general connection between seriated bone harpoons and Nilo-Saharan goes back to the Aqualithic (1974, 1977) of John Sutton (which however, also co-associates ‘wavy-line’ pottery)
•However, none of the geomorphological data for a green Sahara, nor our current understanding of the internal structure of the phylum was then available
•The dispersal of the Western branches of Nilo-Saharan was strongly associated with the opening up of new aquatic resource opportunities
•A east-west and south-north movement at this period can be tracked through;
•finds of:
qbone harpoons
qfossils
qrock-paintings of aquatic species such as hippos in what are now arid regions.