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... > geologic time scale > geological age > Phanerozoic > Mesozoic > Cretaceous > Lower Cretaceous > Barremian

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Barremian  

Definition

  • The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 125.77 Ma (million years ago) and 121.4 ± 1.0 Ma[2] (Historically, this stage was placed at 129.4 million to approximately 125 million years ago) It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series). It is preceded by the Hauterivian and followed by the Aptian Stage. The original type locality for the Barremian Stage is in the vicinity of the village of Barrême, Alpes-de-Haute-Provence, France. The base of the Barremian is determined by the first appearance of the ammonites Spitidiscus hugii and Spitidiscus vandeckii. The end of the Barremian is determined by the geomagnetic reversal at the start of the M0r chronozone, which is biologically near the first appearance of the ammonite Paradeshayesites oglanlensis. (Adapted from: https://en.wikipedia.org/wiki/Barremian)

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http://data.loterre.fr/ark:/67375/QX8-KTRMRN1W-N

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