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Paleoclimatology (thesaurus)

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Oxfordian  

Definition

  • The Oxfordian is, in the ICS' geologic timescale, the earliest age of the Late Jurassic Epoch, or the lowest stage of the Upper Jurassic Series. It spans the time between 161.5 ± 1.0 Ma and 154.8 ± 0.8 Ma (million years ago). The Oxfordian is preceded by the Callovian and is followed by the Kimmeridgian. The name is derived from the English city of Oxford. The base of the Oxfordian Stage is defined as the point in the stratigraphic record where the ammonite species Brightia thuouxensis first appears. The top of the Oxfordian Stage (the base of the Kimmeridgian) is at the first appearance of ammonite species Pictonia baylei. (Adapted from: https://en.wikipedia.org/wiki/Oxfordian_(stage))

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http://data.loterre.fr/ark:/67375/QX8-5VMGKZW0-4

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