page_title: Turonian
section_title: Plesiosaurs
hierarchical_section_title: Turonian / Palaeontology / Plesiosaurs
caption_attribution_description: English: Polyptychodon hudsoni English: Polyptychodon hudsoni
context_page_description: The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous epoch, or a stage in the Upper Cretaceous series. It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma. The Turonian is preceded by the Cenomanian stage and underlies the Coniacian stage.
  At the beginning of the Turonian an anoxic event took place which is called the Cenomanian-Turonian boundary event or the "Bonarelli Event".
caption: Polyptychodon
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