1. Department of Geology, Bowling Green State University, Bowling Green, OH, USA
2. Scripps Institute of Oceanography, University of California San Diego, La Jolla, CA, USA
3. Department of Earth and Environmental Sciences, Michigan State University, East Lansing, MI, USA
4. Department of Geology & Mining Engineering & Sciences, Michigan Tech University, Houghton, MI, USA
5. New Mexico Bureau of Geology & Mineral Resources, Socorro, NM, USA
6. Department of Geoscience, University of Wisconsin, Madison, WI, USA
7. Department of Earth & Environmental Science, New Mexico Tech, Socorro, NM, USA
8. Woods Hole Oceanographic Institution, Woods Hole, MA, USA