1. Department of Earth, Planetary, and Space Sciences University of California, Los Angeles Los Angeles CA 90095 USA
2. Global Change and Sustainability Center University of Utah Salt Lake City UT 84112 USA
3. Department of Geology and Geophysics University of Utah Salt Lake City UT 84112 USA
4. Department of Anthropology University of Utah UT 84112 USA
5. Center for Latin American Studies University of Utah UT 84112 USA
6. Division of Anthropology California State University Fullerton CA 92831 USA
7. Economic Science Institute Chapman University CA 92866 USA
8. Department of Education, Culture, and Society University of Utah Salt Lake City UT 84112 USA