Valanginian
Second age of the early Cretaceous / From Wikipedia, the free encyclopedia
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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 (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceous and precedes the Hauterivian Stage of the Lower Cretaceous.[3]
Quick Facts Chronology, Etymology ...
Valanginian | |||||||||
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139.8 ± 3.0 – 132.6 ± 2.0 Ma | |||||||||
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 / 44.4694; 5.4437 | ||||||||
Upper GSSP ratified | December 2019[2] |
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