1. 1School of Earth Sciences and Environmental Sustainability, P.O. Box 4099, Northern Arizona University, Flagstaff, AZ, 86011; thomas.hoisch@nau.edu
2. 2Center for Science Teaching and Learning, P.O. Box 5697, Northern Arizona University, Flagstaff, AZ, 86011; barbara.a.austin@nau.edu
3. 3Landsward Institute, P.O. Box 5845, Northern Arizona University, Flagstaff, AZ 86011; shawn.newell@nau.edu
4. 4Department of Geography, Planning and Recreation, P.O. Box 15016, Northern Arizona University, Flagstaff, AZ 86011; mark.manone@nau.edu