1. Department of Earth Sciences University College London (UCL) London WC1E 6BT UK
2. Géosciences, CNRS Université de Rennes Rennes 35042 France
3. Ocean and Earth Science National Oceanography Centre Southampton University of Southampton Southampton S014 3ZH UK
4. Department of Geological Sciences Stockholm University Stockholm 106 91 Sweden
5. Programa de Pós‐Graduação em Geologia Universidade do Vale do Rio dos Sinos São Leopoldo 93.022‐000 Brazil
6. GEOMAR, Helmhotz Center for Ocean Research Kiel Wischhofstrasse 1‐3 Kiel 24148 Germany
7. Jackson School of Geosciences University of Texas at Austin 1 University Station, Box X Austin TX 78713 USA
8. Department of Geoscience Shimane University 1060 Nishikawatsu‐cho, Matsue‐shi Shimane 690‐8504 Japan
9. Department of Geophysics Colorado School of Mines Golden CO 80401 USA