National Center for Earth-surface Dynamics, Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455 United States
University of North Carolina at Chapel Hill, CB #3315, Chapel Hill, NC 27599 United States
National Center for Earth-surface Dynamics, Department of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, MN 55455 United States