Berriasian
's information is
Birth and death years unknown
In the geological timescale, the Berriasian is an age or stage of the Early Cretaceous. It is the oldest subdivision in the entire Cretaceous. It has been estimated to span the time between 143.1 ± 0.6 and 137.05 ± 0.2 Ma (million years ago). The Berriasian succeeds the Tithonian (part of the Jurassic) and precedes the Valanginian.
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
| Berriasian | |||||||||
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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 | Undefined | ||||||||
| Lower boundary definition candidates |
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| Upper boundary definition | FAD of Thurmanniceras pertransiens (Ammonite) | ||||||||
| Upper boundary GSSP | Montbrun-les-Bains, Drôme, France 44°12′11″N 5°25′03″E / 44.2031°N 5.4175°E | ||||||||
| Upper GSSP ratified | December 2024 | ||||||||
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