1. Department of Earth and Ocean Sciences; University of British Columbia; 6339 Stores Road,; Vancouver, British Columbia; Canada; V6T 1Z4
2. Scripps Institution of Oceanography; University of California; 9500 Gilman Drive,; La Jolla; California; 92093; USA
3. Department of Geography; University of Lethbridge; 4401 University Drive; Lethbridge, Alberta; Canada; TIK 3M4
4. Department of Geosciences; Center University of Massachusetts; 611 North Pleasant Street, 233 Morrill Science,; Amherst; Massachusetts; 01003-9297; USA
5. Earth and Planetary Sciences Department; University of California; Santa Cruz; California; 95064; USA
6. Geophysical Institute; University of Alaska; 903 Koyukuk Drive,; Fairbanks; Alaska; 99775-7320; USA
7. Universidad Nacional de Colombia; Manizales; Colombia
8. Department of Geological Sciences; University of Florida; 241 Williamson Hall,; Gainesville; Florida; 32611; USA
9. Department of Geology and Geophysics; University of Wisconsin-Madison; 1215 West Dayton Street,; Madison; Wisconsin; 53706; USA