Apennines, applications, biostratigraphy, Cenozoic, central, Cretaceous, Europe, Foraminifera, Gubbio Italy, intervals, Invertebrata, Italy, Mesozoic, microfossils, Paleocene, Paleogene, paleomagnetism, Perugia Italy, Phanerozoic, Protista, reversals, Scaglia Formation, Southern Europe, stratigraphic boundary, stratigraphy, Tertiary, Umbria Italy, Upper Cretaceous
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