The Aptian GSSP candidate at Gorgo a Cerbara (Central Italy): an alternative interpretation of the bio-, litho- and chemostratigraphic markers

Camille Frau (1) , Luc Bulot (2) , Gérard Delanoy (3) , Josep Moreno-Bedmar , Jean-Pierre Masse (4) , Anthony J.-B. Tendil (2) , Cyprien Lanteaume (2)

1 Groupement d'Intérêt Paléontologique
2 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement
3 DST - Département des Sciences de la Terre
4 AMU - Aix Marseille Université

The Maiolica-type Gorgo a Cerbara section (Central Italy) was proposed as GSSP candidate for defining the base of the Aptian Stage with the base of the reverse magnetochron CM0r as the primary datum. Comparison with well-documented, ammonite-bearing successions of southeast France shows that the bio-, litho- and chemostratigraphic events recorded in Italy, below, at, and above this magnetochron fall within the Martelites sarasini ammonite Zone. Since there is an agreement that the M. sarasini Zone is the last ammonite zone of the Barremian, the use of the base of magnetozone CM0r as a datum to define the Barremian/Aptian boundary is questioned.

Domaines: Stratigraphie; Paléontologie; Géochimie; Géologie appliquée

Camille Frau, Luc Bulot, Gérard Delanoy, Josep Moreno-Bedmar, Jean-Pierre Masse, et al.. The Aptian GSSP candidate at Gorgo a Cerbara (Central Italy): an alternative interpretation of the bio-, litho- and chemostratigraphic markers. Newsletters on Stratigraphy, 2018, 51 (3), pp.311-326. ⟨10.1127/nos/2017/0422⟩. ⟨hal-02105489⟩