The Santonian is an age in the geologic timescale or a chronostratigraphic stage. It is a subdivision of the Late Cretaceous epoch or Upper Cretaceous series. It spans the time between 85.8 ± 0.7 mya (million years ago) and 83.5 ± 0.7 mya. The Santonian is preceded by the Coniacian and is followed by the Campanian. ==Stratigraphic definition== T...
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http://en.wikipedia.org/wiki/Santonian
European stage of the Upper Cretaceous, spanning the time between 88 and 84 million years ago.
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https://www.encyclo.co.uk/local/21202
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