LIVINGSTONE, Stephen1, LEWINGTON, Emma L.M.1, CLARK, Chris D.1, STORRAR, Robert D.2, SOLE, Andrew J.1, MCMARTIN, Isabelle3, DEWALD, Nico1, NG, Felix1, VÉRITÉ, Jean4 and RAVIER, Edouard4, (1)Geography, University of Sheffield, Department of Geography, Sheffield, S10 2TN, United Kingdom, (2)Department of the Natural and Built Environment, Sheffield Hallam University, Sheffield, S1 1WB, United Kingdom, (3)Geological Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, CANADA, (4)Laboratoire de Planétologie et Géodynamique, Le Mans Université, Le Mans, CEDEX 9, France