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In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.6 ± 2.0 Ma. The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceous and precedes the Hauterivian Stage of the Lower Cretaceous.
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References
- ↑ Beatriz Aguirre-Urreta and Peter F. Rawson (2012). "Lower Cretaceous ammonites from the Neuquén Basin, Argentina: A new heteromorph fauna from the uppermost Agrio Formation". Cretaceous Research. 35: 208–216. doi:10.1016/j.cretres.2012.01.001. hdl: 11336/68453 .
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