1. Department of Geology and Geophysics University of Utah Salt Lake City UT USA
2. Department of Marine, Earth, and Atmospheric Sciences North Carolina State University Raleigh NC USA
3. Department of Earth and Atmospheric Sciences University of Nebraska – Lincoln Lincoln NE USA
4. Conservation and Survey Division School of Natural Resources University of Nebraska – Lincoln Lincoln NE USA
5. Biological Systems Engineering Department University of Nebraska – Lincoln Lincoln NE USA