The Hauterivian is, in the geologic timescale, an age in the Early Cretaceous epoch or a stage in the Lower Cretaceous series. It spans the time between 136.4 ± 2 Ma and 130 ± 1.5 Ma (million years ago). The Hauterivian is preceded by the Valanginian and succeeded by the Barremian. ==Stratigraphic definitions== The Hauterivian was introduced in ...
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http://en.wikipedia.org/wiki/Hauterivian
European stage of the Lower Cretaceous, spanning the time between 122 and 118 million years ago.
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https://www.encyclo.co.uk/local/21202
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