Skip to main content
Swiss Journal of Palaeontology
Fig. 6 | Swiss Journal of Palaeontology

Fig. 6

From: Fluctuations of the oxygen minimum zone at the end of Oceanic Anoxic Event 2 in the Gulf of Mexico and the response of ammonites

Fig. 6

The Vallecillo section with inferred expansion (gray) and contraction (white) of the oxygen minimum zone. A Litholog. B Biostratigraphic zonation based on I inoceramids and A ammonoids. C abundance of P. flexuosum over the section. D diameters of P. flexuosum plotted against the section. The arrow marks the approximate level, when P. flexuosum occurs in other sections, and when V. birchbyi first occurs within a phase of expanded OMZ. E first and last occurrences in the ammonoids. F interpreted bioevents in the ammonoid assemblage. Bold all-over response, light response of the species P. flexuosum (summarized from Ifrim 2006, 2013; Ifrim and Stinnesbeck 2007, 2008; Ifrim et al. 2011a)

Back to article page