1. Department of Geology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA
2. Wyoming Center for Environmental Hydrology and Geophysics, University of Wyoming, Laramie, Wyoming 82071, USA
3. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta Georgia 30332, USA
4. Department of Geoscience, University of Wisconsin, Madison, Wisconsin 53706, USA
5. Department of Earth Sciences, Montana State University, Bozeman, Montana 59717, USA
6. Wollongong Isotope Geochronology Laboratory, School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
7. Department of Earth and Planetary Science, University of California, Berkeley, California 94720, USA
8. Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, USA
9. Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture, Fresno, California 93710, USA
10. Department of Natural Resources and Environmental Sciences, University of Nevada, Reno, Nevada 89557, USA
11. Department of Geography, Planning & Environment, Concordia University, Montreal, Quebec H3G 1M8, Canada