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1. Hauterivian: 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 132.6 ± 2 Ma and 125.77 (million years ago). (Earth) [100%] 2023-11-16 [Hauterivian] [Early Cretaceous]...