出典:Wiktionary
出典:『Wiktionary』 (2026/03/02 21:38 UTC 版)
the Valanginian
出典:Wikipedia
出典:『Wikipedia』 (2011/06/10 17:11 UTC 版)
In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 140.2 ± 3.0 Ma and 136.4 ± 2.0 Ma (million years ago). The Valanginian stage succeeds the Berriasian stage of the Lower Cretaceous and precedes the Hauterivian stage of the Lower Cretaceous.