1. Department of Geography, Geology, and the Environment Illinois State University Normal IL USA
2. Department of Geology and Environmental Geosciences Lafayette College Easton PA USA
3. Department of Geological Sciences Stanford University Stanford CA USA
4. School of Geography, Environment and Earth Sciences Victoria University of Wellington Wellington New Zealand
5. Department of Earth Sciences Memorial University of Newfoundland St. John's Canada
6. Department of Geology and Environmental Geosciences Northern Illinois University DeKalb IL USA
7. Department of Geological and Environmental Sciences Appalachian State University Boone NC USA