1 | School of Geography, Archaeology and Environmental Studies., University of the Witwatersrand, South Africa |
2 | Geology, School for Geo- and Spatial Science, Faculty of Natural and Agricultural Science, North West University, South Africa |
3 | Evolutionary Studies Institute, University of the Witwatersrand, South Africa |
4 | Department of Archaeology and Anthropology, University of Ibadan, Ibadan, Nigeria |