1. 1 Department of Geosciences, University of Arizona, 1040 E. 4th Street Tucson, AZ 85721, USA
2. 2 U.S. Geological Survey, 12201 Sunrise Valley Dr, Reston, VA, 20192, USA
3. 3 Department of Geology, 126 Cooke Hall, University at Buffalo, Buffalo, NY, 14620, USA
4. 4 Department of Earth System Science, Croul Hall, University of California, Irvine, CA, 92697, USA