Related to WSA post on the fossils and finds of early humans what most people do not realize is that Africa is a very old and pretty much intact continent.      It has had the other continents bouncing off of it several times in earth history and been joined all together in one massive continent but it has remained pretty much stable and the same shape for much of earths history.     There is not a lot of volcanic history in Africa and what there is localized leaving large areas of ancient rock
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