1. Nicholas School of the EnvironmentDuke UniversityBox 90227Durham North Carolina27708 USA
2. Department of Earth and Ocean SciencesUniversity of South CarolinaColumbia South Carolina USA
3. Now at KleinfelderAustin, Texas USA
4. Nicholas School of the EnvironmentDuke UniversityDurham North Carolina USA
5. Now at POWER EngineersLakewood Colorado USA
6. Department of Geology and GeophysicsWoods Hole Oceanographic InstitutionWoods Hole Massachusetts USA
7. Department of Geological SciencesUniversity of FloridaGainesville Florida USA
8. Geosciences Research DivisionScripps Institution of OceanographyUniversity of California San DiegoLa Jolla California USA
9. Department of Geology and GeophysicsUniversity of WyomingLaramie Wyoming USA
10. Now at Institute of Earth Science and EngineeringUniversity of AucklandAuckland New Zealand
11. USGS, Mineral Resources ProgramDenver Federal CenterDenver Colorado USA