1. Department of Paleontology, San Diego Natural History Museum, San Diego, CA, USA
2. Center for American Paleolithic Research, Hot Springs, SD, USA
3. Museum of Paleontology, University of Michigan, Ann Arbor, MI, USA
4. Department of Earth and Environmental Sciences, University of Michigan, Ann Arbor, MI, USA
5. Centre for Archaeological Science, School of Earth and Environmental Sciences, Faculty of Science Medicine and Health, University of Wollongong, Wollongong, New South Wales, Australia
6. Geosciences and Environmental Change Science Center, U.S. Geological Survey, Denver, CO, USA
7. Colorado Desert District, Stout Research Center, California Department of Parks and Recreation, Borrego Springs, CA, USA
8. Department of Earth Science, Adams State University, Alamosa, CO, USA