1 State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China; Palaeo-Research Institute, University of Johannesburg, Auckland Park 2006, South Africa.
2 Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China.
3 Palaeo-Research Institute, University of Johannesburg, Auckland Park 2006, South Africa.
4 Department of Archaeology, University of Exeter, Exeter EX4 4QE, UK.
5 School of Geography, Archaeology and Environmental Studies, University of the Witwatersrand, Johannesburg WITS 2050, South Africa.
6 State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: [email protected].