[1] Univ Witwatersrand, Evolutionary Studies Inst, Johannesburg, South Africa
[2] Univ Witwatersrand, Sch Geog Archaeol & Environm Studies, Johannesburg, South Africa
[3] Univ Tubingen, Dept Early Prehist & Quaternary Ecol, D-72070 Tubingen, Germany
[4] GEM, Casilla Mortero, Madrid 28189, Spain
[5] Nelson Mandela Univ, African Ctr Coastal Palaeosci, ZA-6031 Port Elizabeth, Eastern Cape, South Africa
[6] Univ Witwatersrand, Origins Ctr, Johannesburg, South Africa