| Affiliation: | 1. Department of Earth and Environmental Science, James Cook University, Townsville, QLD 4811, Australia;2. Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;3. Paria River District, Bureau of Land Management, Kanab, UT 84741, USA;4. P.O. Box 231, Tropic, UT 84776, USA;5. Natural History Museum of Utah, University of Utah, Salt Lake City, UT 84108-1214, USA;6. Department of Geology & Geophysics, University of Utah, Salt Lake City, UT 84112-0102, USA;7. Department of Earth Sciences, Denver Museum of Nature and Science, Denver, CO 80205, USA;8. Department of Geosciences, Warner College of Natural Resources, Colorado State University, Fort Collins, CO 80523, USA |
