An integrated stratigraphic record of the Palaeocene-lower Eocene at Gubbio (Italy): new insights into the early Palaeogene hyperthermals and carbon isotope excursions - Coccioni, Rodolfo; Bancalà, Giuseppe; Catanzarit, Rita; Fornaciari, Eliana; Frontalini, Fabrizio; Giusberti, Luca; Jovane, Luigi; Luciani, Valeria; Savian, Jairo F; Sprovieri, Mario (Terra Nova, 2012)