Astronomical tuning of the aptian stage and its implications for age recalibrations and paleoclimatic events

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SUMMARY

    Several radiometric ages have been obtained for the OJP and associated basalt flows (e_g, refs. From bottom to top, they are: the Wezel Level horizon20 the Fallot Level (~117.8 Ma21,22), the 113/Jacob Level (~113-115 Ma21,23), and_(4) the Kilian Level (~112-113 Ma), the last one marking the Aptian-Albian boundary7,11,21,24. Conversely, a greyscale cyclostratigraphic study for the Piobbico core calibrates the Aptian at 13.42 Myr, providing age of 125.45 Ma for the Barremian-Aptian boundary21. The Barremian-Aptian boundary`s age is among . . .

     

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