Federico Marini (1), Enrico Pandeli (1,2), Marco Tongiorgi (3), Elena Pecchioni (1) & Letizia Orti (1)
(1) Department of Earth Sciences, University of Firenze - Via G. La Pira, 4 - 50121 Florence.
(2) Florence section of Geosciences and Earth Resources Institute, IGG - CNR (Pisa) - Via G. La Pira, 4 - 50121 Florence.
(3) Retired Professor of the Department of Earth Sciences, University of Pisa - c/o Museum of Natural History - Via Roma, 79 - 56011 Calci (Pisa).
Corresponding authors e-mail: enrico.pandeli@unifi.it