ABBOTT, Lon D., Geological Sciences, University of Colorado, UCB 399, Boulder, CO 80309, lon.abbott@colorado.edu, LUNDSTROM, Craig, Department of Geology, University of Illinois-Urbana Champaign, 245 Natural History Bldg, 1301 W. Green Street, Urbana, IL 61801, and TRAUB, Chance, Environmental Studies Program, Prescott College, 220 Grove Ave, Prescott, AZ 86303

CROW, Ryan S., Department of Earth and Planetary Science, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, crow.ryan@gmail.com and KARLSTROM, Karl E., Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131

DARLING, Andrew, School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287-1404, aldarlin@asu.edu, WHIPPLE, Kelin X., School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, NICHOLS, Kyle K., Department of Geosciences, Skidmore College, 815 North Broadway, Saratoga Springs, NY 12866, and BIERMAN, Paul R., Department of Geology, University of Vermont, Delehanty Hall, 180 Colchester Ave, Burlington, VT 05405

WHIPPLE, Kelin X., School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, kxw@asu.edu and DARLING, Andrew, School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287-1404

WARNEKE, Nadine Lynne, Earth and Planetary Sciences, University of New Mexico, 221 Yale Blvd NE, Albuquerque, NM 87131-0001, nadine.warneke@gmail.com, LEE, John P., United States Geological Survey, MS 973, Denver, CO 80225, KELLEY, Shari A., New Mexico Bureau of Geology and Mineral Resources, New MexicoTech, 801 Leroy Place, Socorro, NM 87801, STOCKLI, Daniel F., Department of Geological Sciences, University of Texas at Austin, Jackson School of Geosciences, 1 University Station C9000, Austin, TX 78712, KARLSTROM, Karl E., Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, and FOX, Matthew, Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709

FOX, Matthew, Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, matthew.fox@berkeley.edu and SHUSTER, David L., Department of Earth and Planetary Science, 479 McCone Hall, University of California, Berkeley, CA 94720

HEREFORD, Richard, AMOROSO, Lee, BEARD, Sue, and HOUSE, P. Kyle, U.S. Geological Survey, 2255 N. Gemini Drive, Flagstaff, AZ 86001, rhereford@usgs.gov

WERNICKE, Brian, Division of Geological and Planetary Sciences, California Institute of Technology, Mail Stop 100-23, Pasadena, CA 91125, brian@gps.caltech.edu

KARLSTROM, Karl E.¹, LEE, John P.², KELLEY, Shari A.³, CROW, Ryan S.⁴, CROSSEY, Laura J.⁵, YOUNG, Richard A.⁶, LAZEAR, Greg⁷, BEARD, L. Sue⁸, and RICKETTS, Jason W.⁴, (1) Department of Earth and Planetary Science, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, kek@unm.edu, (2) United States Geological Survey, MS 973, Denver, CO 80225, (3) New Mexico Bureau of Geology and Mineral Resources, New MexicoTech, 801 Leroy Place, Socorro, NM 87801, (4) Earth and Planetary Science, University of New Mexico, Albuquerque, NM 87131-0001, (5) Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, (6) Geological Sciences, State University of New York at Geneseo, Geneseo, NY 14454, (7) Grand Junction Geological Society, 20508 Brimstone Rd, Cedaredge, CO 81413, (8) U.S. Geological Survey, 2255 N Gemini Dr, Flagstaff, AZ 86001-1637