[1] Univ York, Dept Archaeol, BioArCh, York YO10 5DD, N Yorkshire, England
[2] Univ Firenze, Sez Archeol & Antico Oriente, Dipartimento Storia Archeol Geog Arte & Spettacol, Via S Gallo 10, I-50129 Florence, Italy
[3] Museo & Ist Fiorentino Preistoria, Via S Egidio 21, I-50122 Florence, Italy
[4] Univ Pisa, Dipartimento Sci Terra, Via Santa Maria 53, I-56126 Pisa, Italy
[5] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, Nik Plastira 100, Iraklion 70013, Greece
[6] Univ Torino, Dipartimento Sci Vita & Biol Sisterni, V Accad Albertina 13, I-10123 Turin, Italy
[7] British Geol Survey, NERC Isotope Geosci Facil, Nottingham NG12 5GG, England
[8] Univ Nottingham, Sch Biosci, Ctr Environm Geochem, Sutton Bonington Campus, Loughborough, Leics, England
[9] Univ Palermo, Dipartimento Sci Terra & Mare, Via Archirafi 22, I-90123 Palermo, Italy
[10] Univ York, Dept Chem, York YO10 5DD, N Yorkshire, England