GEARON, James A, Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX 78713 and YOUNG, Michael H., Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, TX 78713
CARNES, Lorraine K., School of Earth and Space Exploration, Arizona State University, ISTB4 - BLDG75, 781 E Terrace Mall, Tempe, AZ 85287-6004, KODAMA, Kenneth P., Earth and Environmental Sciences, Lehigh University, 1 W Packer Ave, Bethlehem, PA 18015 and HEIMSATH, Arjun M., School of Earth and Space Exploration, Arizona State University, ISTB4, Tempe, AZ 85287
ESCOTO, Eric A., School of Earth and Space Exploration, Arizona State University, 781 E. Terrace Mall, Room 768, Tempe, AZ 85287 and VIVONI, Enrique R., School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85281
BADDOCK, Matthew C., Department of Geography, Loughborough University, Loughborough, LE11 3TU, United Kingdom, BRYANT, Robert G., Geography, University of Sheffield, Sheffield, S10 2TN, United Kingdom and GILL, Thomas E., Geological Sciences, University of Texas at El Paso, El Paso, TX 79968