1. Department of Terrestrial Magnetism Carnegie Institution for Science Washington DC USA
2. Smithsonian Institution National Museum of Natural History Washington DC USA
3. Deceased 5 September 2018
4. Graduate School of Oceanography University of Rhode Island Narragansett RI USA
5. National High Magnetic Field Laboratory and Department of Earth, Ocean and Atmospheric Sciences Florida State University Tallahassee FL USA
6. Department of Earth and Planetary Sciences Harvard University Cambridge MA USA
7. Scripps Institution of Oceanography University of California San Diego San Diego CA USA
8. Deceased 7 January 2018
9. Department of Earth Sciences University of Oxford Oxford UK
10. Centre de Recherches Pétrographiques et Géochimiques, UMR7358, CNRS ‐ Université de Lorraine Vandoeuvre‐lès‐Nancy France