Affiliation: | 1. Department of Anthropology, California Academy of Sciences, 55 Music Concourse Dr. San Francisco, CA 94118;2. Archaeology Section, National Museums of Kenya, Nairobi, Kenya;3. Earth Sciences Department, National Museums of Kenya, Nairobi, Kenya;4. Department of Geological Sciences, Indiana University, 1001 East 10th St., Bloomington, IN 47405‐1405;5. Smithsonian InstitutionMRC 112, PO Box 37012, Washington, DC 20013‐0112 |