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)

Rodolfo Coccioni, Alessandro Montanari, Samuele Boschi, Rita Catanzariti, Fabrizio Frontalini, Luigi Jovane, Marcus Vinicius Lermen Kochhann, Nicola Pelosi, Nadia Sabatino, Jairo F. Savian, Mario Sprovieri

    Research output: Chapter in Book/Report/Conference proceedingBook chapterResearchpeer-review

    Abstract

    At present, the Global Stratotype Section and Point (GSSP) for the base of the Bartonian remains the only GSSP of the Paleogene System to be defined by the International Subcommission on Paleogene Stratigraphy (ISPS) and the International Commission on Stratigraphy (ICS). Here, we present the results of an integrated, high-resolution study of calcareous plankton and benthic foraminifera biostratigraphy and a detailed magneto-, chemo-, and cyclostratigraphic analyses carried out through the upper Lutetian to the upper Priabonian pelagic sediments of the Bottaccione Gorge section near Gubbio, central Italy, to check its stratigraphic completeness and constrain in time the optimal interval for defining and positioning the GSSP for the base of the Bartonian Stage. The high-resolution and solid integrated stratigraphic framework established at Bottaccione confirmed the completeness of the section, which meets the ICS recommendations for a potential designation as a GSSP for the base of the Bartonian Stage. Thus, the Bottaccione section was compared with the parastratotype section of the Bartonian in its type area, Alum Bay, UK. On this basis, two reliable criteria for defining and positioning the Bartonian GSSP at Bottaccione are provided: (1) the base of magnetic polarity chronozone C18r as the primary correlation criterion and (2) the base of the calcareous nannofossil Dictyococcites bisectus, which defines the CNE14/CNE15 zonal boundary as a secondary correlation criterion.

    Original languageEnglish
    Title of host publicationFrom the Guajira Desert to the Apennines, and from Mediterranean Microplates to the Mexican Killer Asteroid
    Subtitle of host publicationHonoring the Career of Walter Alvarez
    EditorsChristian Koeberl, Philippe Claeys, Alessandro Montanari
    PublisherGeological Society of America
    ISBN (Electronic)9780813795577
    ISBN (Print)9780813725574
    DOIs
    Publication statusPublished - 2022 Jun 1

    Publication series

    NameSpecial Paper of the Geological Society of America
    Volume557
    ISSN (Print)0072-1077

    Subject classification (UKÄ)

    • Geology

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