[1] Institut des Sciences de la Terre d'Orléans, UMR 7327, CNRS–Université d'Orléans–BRGM, France
[2] Department of Geography, University of Cambridge, United Kingdom
[3] Dep. of Geosciences, IDAEA-CSIC, Barcelona, Spain
[4] Department of Earth Sciences, Universidad de la Laguna, Tenerife, Spain
[5] IGN, Madrid, Spain