1. Applied Paleoscience and DirectAMS, 10322 NE 190th Street, Bothell, WA 98011, USA.
2. Department of Anthropology and Institutes of Energy and the Environment, Pennsylvania State University, University Park, PA 16802, USA.
3. Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131–0001, USA.
4. Department of Anthropology and School of Biological Sciences, Washington State University, Pullman, WA 99164, USA.
5. Bay Area Underwater Explorers, Berkeley, CA, USA.
6. Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL 60208, USA.
7. School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada.
8. Instituto Nacional Antropología e Historia, Colonia Centro Histórico, 06060, Mexico City, DF, Mexico.
9. Department of Anthropology and Population Research Center, University of Texas at Austin, Austin, TX 78712, USA.
10. Institute for Genomic Biology, University of Illinois, Urbana–Champaign, IL 61801, USA.
11. Subdirección de Arqueología Subacuática, Instituto Nacional de Antropología e Historia, 06070 Mexico City, Mexico.
12. Waitt Institute, La Jolla, CA 92038–1948, USA.
13. Department of Anthropology, Stanford University, Stanford, CA 94305, USA.
14. Centre for AMS 14C, Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark, and Centre for GeoGenetics, Natural History Museum of Denmark, Geological Museum, Copenhagen, Denmark.