1. Department of Earth Science University of the Western Cape Bellville South Africa
2. Helmholtz Centre Potsdam GFZ Potsdam Germany
3. Department of Earth Sciences University of Cambridge Cambridge UK
4. Department of Geological Sciences Jackson School of Geoscience University of Texas at Austin Austin TX USA
5. Center for Planetary Systems Habitability University of Texas at Austin Austin TX USA
6. Institute for Geophysics Jackson School of Geoscience University of Texas at Austin Austin TX USA