1 | MARE – Marine and Environmental Sciences Centre, Department of Earth Sciences, University of Coimbra, Rua Sílvio Lima, 3030-790 Coimbra, Portugal |
2 | UMR CNRS 6118 Géosciences, Université Rennes 1, avenue du Général Leclerc, 35042 Rennes cedex, France |
3 | School of Earth, Atmospheric and Environmental Sciences, University of Manchester, UK and Institute of Geography and Earth Sciences, Aberystwyth University, Wales, UK |