Valanginian
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 (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceous and precedes the Hauterivian Stage of the Lower Cretaceous.
| Valanginian | |||||||||
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| Chronology | |||||||||
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| Etymology | |||||||||
| Name formality | Formal | ||||||||
| Usage information | |||||||||
| Celestial body | Earth | ||||||||
| Regional usage | Global (ICS) | ||||||||
| Time scale(s) used | ICS Time Scale | ||||||||
| Definition | |||||||||
| Chronological unit | Age | ||||||||
| Stratigraphic unit | Stage | ||||||||
| Time span formality | Formal | ||||||||
| Lower boundary definition | Not formally defined | ||||||||
| Lower boundary definition candidates | FAD of the Calpionellid Calpionellites darderi | ||||||||
| Lower boundary GSSP candidate section(s) |
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| Upper boundary definition | FAD of the Ammonite genus Acanthodiscus | ||||||||
| Upper boundary GSSP | La Charce, Drôme, France 44.4694°N 5.4437°E | ||||||||
| Upper GSSP ratified | December 2019 | ||||||||
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