1. Departamento de Geología, Grupo de Ciencias del Mar; Universidad EAFIT; Medellín Colombia
2. Woods Hole Oceanographic Institution; Woods Hole Massachusetts USA
3. Department of Nuclear Physics, Research School of Physical Sciences and Engineering; Australian National University; Canberra, ACT Australia
4. Department of Earth and Planetary Sciences, Graduate School of Science; University of Tokyo; Tokyo Japan
5. Earth System Science Department; University of California Irvine; Irvine California USA