Rivista Italiana di Paleontologia e Stratigrafia (Research in Paleontology and Stratigraphy) vol. 124(3): 617-637. November 2018 THE VALANGINIAN WEISSERT OCEANIC ANOXIC EVENT RECORDED IN CENTRAL-EASTERN SARDINIA (ITALY) CINZIA BOTTINI1*, IGINIO DIENI2, ELISABETTA ERBA1, FRANCESCO MASSARI2 & HELMUT WEISSERT3 1*Corresponding author. Dipartimento di Scienze della Terra “A. Desio”, Università degli Studi di Milano, Via Mangiagalli, 34, I-20133 Milano, Italy. E-mail:
[email protected];
[email protected] 2Dipartimento di Geoscienze, Università degli Studi di Padova, Via Gradenigo, 6, I-35131 Padova, Italy. E-mail:
[email protected] 3Department of Earth Sciences, Geology, ETH-Zürich, Sonneggstrasse 5, CH-8092 Zürich, Switzerland. E-mail:
[email protected] To cite this article: Bottini C., Dieni I., Erba E., Massari F. & Weissert H. (2018) - The Valanginian Weissert Oceanic Anoxic Event recorded in central-eastern Sardinia (Italy). Riv. It. Paleontol. Strat., 124(3): 617-637. Keywords: Valanginian; Weissert Oceanic Anoxic Event; lithostratigraphy; biostratigraphy; Carbon isotopes. Abstract . Investigations on the S’Ozzastru section from the northern part of the Mt Albo area (central-eastern Sardinia, Italy) for integrated litho- bio- and chemostratigraphy allowed the identification of the Valanginian Weissert Oceanic Anoxic Event (OAE), testified by a positive carbon isotope excursion (CIE). The section, which represents the deepest-water succession of the Valanginian in Sardinia, is composed of the Schiriddè Limestone followed by the Siniscola Marl, both proposed as new lithostratigraphic units. The presence among the ammonites of Busnardoites campylotoxus allows the attribution of the Schiriddè Limestone to the upper Lower Valanginian Inostranzewi Zone of Reboulet et al. 2014.