1. Department of Earth and Planetary Sciences, The University of Tennessee, Knoxville, Tennessee, USA
2. Department of Geosciences, Baylor University, Waco, Texas, USA
3. Department of Geography & Sustainability, The University of Tennessee, Knoxville, Tennessee, USA
4. Department of Geosciences, Utah State University, Logan, Utah, USA
5. College of Arts and Sciences, The University of Tennessee, Knoxville, Tennessee, USA