Integrated stratigraphy of the Lutetian–Priabonian pelagic section at Bottaccione (Gubbio, central Italy): A proposal for defining and positioning the Global Stratotype Section and Point (GSSP) for the base of the Bartonian Stage (Paleogene System, Eocene Series): capítulo 16 - Coccioni, Rodolfo; Montanari , Alessandro; Boschi, Samuele; Catanzariti, Rita; Frontalini, Fabrizio; Jovane, Luigi; Kochhann, Marcus Vinicius Lermen; Pelosi, Nicola; Sabatino, Nadia; Savian, Jairo F.; Sprovieri, Mario (From the Guajira Desert to the Apennines, and from Mediterranean Microplates to the Mexican Killer Asteroid: Honoring the Career of Walter Alvarez, 2022)