Massimiliano Ghinassi (*), Francesco Fidolini (**), Maurizio Magi (**), Mauro Papini (**) & Mario Sagri (**)
(*) Department of Geosciences, University of Padua, Via Gradenigo 6, 35131 Padova, Italy.
(**) Department of Earth Science, University of Florence, Via La Pira 4, 50121 Florence, Italy.