1. Department of Geology & Environmental Geosciences, Northern Illinois University, DeKalb, Illinois
2. Department of Physics, Astronomy & Geosciences, Towson University, Towson, Maryland
3. School of the Earth, Ocean & Environment, University of South Carolina, Columbia, South Carolina
4. Department of Geology & Environmental Science, James Madison University, Harrisonburg, Virginia
5. Sciences Department, Whatcom Community College, Bellingham, Washington