Daniele Regis (a*), Roberto Cossio (a) & Roberto Compagnoni (a)
(a) Dept. of Earth Sciences, University of Torino, Via Valperga Caluso 35, 10125 Torino (Italy); *Corresponding email: daniele.regis@canada.ca. Current address: Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8 (Canada).