1 Leverhulme Centre for Human Evolutionary Studies, Department of Archaeology &Anthropology, University of Cambridge, Fitzwilliam Street, Cambridge CB2 1QH, UK.
2 Turkana Basin Institute, PO box 24467-00502, Nairobi, Kenya.
3 National Museums of Kenya, Jomo Kenyatta House, PO box 152-30500, Lodwar, Kenya.
4 Departamento de Prehistoria y Arqueologia, UNED, c/ Paseo Senda del Rey, 7, 28040 Madrid, Spain.
5 National Museums of Kenya, PO box 40658-00100, Nairobi, Kenya.
6 Jomo Kenyatta University of Agriculture and Technology, PO box 62000-00200, Nairobi, Kenya.
7 Research School of Earth Sciences, The Australian National University, Building 142, Mills Road, Acton, Australian Capital Territory 2601, Australia.
8 Research Laboratory for Archaeology and the History of Art, University of Oxford, Dyson Perrins Building, South Parks Road, Oxford OX1 3QY, UK.
9 Australian Research Centre for Human Evolution, Environmental Futures Research Institute, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia.
10 Department of Geology, Anna University, Chennai, Tamil Nadu 600025, India.