Paola Revellino(*), Luigi Guerriero(*), Gerardo Grelle(*), Oldrich Hungr(**), Francesco Fiorillo(*), Libera Esposito(*) & Francesco M. Guadagno(*)
(*) Department of Sciences and Technologies, University of Sannio, via dei Mulini, 59/A - 82100 Benevento, Italy; Corresponding author: paola.revellino@unisannio.it; Tel +39(0824) 323636;
Fax +39(0824) 323623. (**) Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, BC, V6T 1Z4, Canada.