1. Department of Geosciences; University of Arizona; Tucson; Arizona; USA
2. Department of Geology and Geophysics; Yale University; New Haven; Connecticut; USA
3. ETH Zürich; Geologisches Institut; Zurich; Switzerland
4. Sezione di Firenze; IGG; Florence; Italy
5. Dipartimento di Scienze della Terra; Università di Pisa; Pisa; Italy