Gillian R Foulger¹, Anthony G Doré², C Henry Emeleus³, Dieter Franke⁴, Laurent Geoffroy⁵, Laurent Gernigon⁶, Richard N Hey⁷, Robert Holdsworth¹, Malcolm Hole⁸, Armann Hoskuldsson⁹, Bruce R Julian¹⁰, Nick Kusznir¹¹, Fernando Martinez¹², Kenneth J W McCaffrey¹³, James H Natland¹⁴, Alexander Peace¹⁵, Kenni Dinesen Petersen¹⁶, Christian Schiffer¹⁷, Randell Stephenson¹⁸ and Martyn S. Stoker¹⁹, (1)University of Durham, Department of Earth Sciences, Durham, United Kingdom, (2)Statoil, London, United Kingdom, (3)Durham University, Department of Earth Sciences, Durham, United Kingdom, (4)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (5)IUEM Institut Universitaire Européen de la Mer, Plouzané, France, (6)Geological Survey of Norway, Trondheim, Norway, (7)University of Hawaii at Manoa, HIGP/SOEST, Honolulu, HI, United States, (8)University of Aberdeen, School of Geosciences, Aberdeen, United Kingdom, (9)University of Iceland, Faculty of Earth Sciences, Reykjavik, Iceland, (10)USGS California Water Science Center Menlo Park, Menlo Park, CA, United States, (11)University of Liverpool, Liverpool, United Kingdom, (12)Univ of Hawaii-SOEST/HIGP, Honolulu, HI, United States, (13)University of Durham, Durham, United Kingdom, (14)RSMAS/MGS, University of Miami, Miami, FL, United States, (15)McMaster University, School of Geography and Earth Sciences, Hamilton, ON, Canada, (16)Aarhus University, Department of Geoscience, Aarhus, Denmark, (17)Uppsala University, Aarhus C, Denmark, (18)University of Aberdeen, Aberdeen, United Kingdom, (19)Australian School of Petroleum, University of Adelaide, Adelaide, Australia