1. Université de Bretagne Occidentale, IUEM, CNRS, UMR LETG, Technopôle Brest-Iroise, rue Dumont d'Urville, Plouzané, France
2. Geomorphological Field Laboratory (GFL), Selbustrand/Trondheim, Norway
3. Geological Survey of Norway (NGU), Trondheim, Norway