1. Department of Anthropology, South Stevens Hall, University of Maine, Orono, ME 04469-5773, USA.
2. Department of Early Prehistory and Quaternary Ecology, Schloß Hohentübingen, Burgsteige 11, 72070 Tübingen, Germany.
3. Climate Change Institute, Bryand Global Sciences Center, University of Maine, Orono, ME 04469, USA.
4. Accelerator Mass Spectrometry Laboratory, Department of Physics and School of Anthropology, University of Arizona, Tucson, AZ 85721, USA.
5. University of Pennsylvania Museum, 3260 South Street, Philadelphia, PA 19104, USA.
6. Department of Anthropology and Archaeology, Earth Sciences Building, Room 806, 844 Campus Place Northwest, Calgary, British Columbia, Canada.
7. Institute for Archaeological Sciences, University of Tübingen, Rümelinstrasse 23, 72070 Tübingen, Germany.
8. Senckenberg Centre for Human Evolution and Paleoenvironment, University of Tübingen, Rümelinstrasse 23, 72070 Tübingen, Germany.
9. Department of Anthropology, 354 Mansfield Road, University of Connecticut, Storrs, CT 06269-1176, USA.
10. Department of Anthropology, University of Illinois at Chicago, Behavioral Sciences Building, 1007 West Harrison Street, Chicago, IL 60607-7139, USA.
11. Arequipa, Peru.