Bathonian
In the geologic timescale the Bathonian is an age and stage of the Middle Jurassic. It lasted from approximately 168.2 ±1.2 Ma to around 165.3 ±1.1 Ma (million years ago). The Bathonian Age succeeds the Bajocian Age and precedes the Callovian Age.
| Bathonian | |||||||||
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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 | FAD of the Ammonite Gonolkites convergen | ||||||||
| Lower boundary GSSP | Ravin du Bès, Bas-Auran, Alpes de Haute, France 43.9606°N 6.3153°E | ||||||||
| Lower GSSP ratified | July 2008 | ||||||||
| Upper boundary definition | FAD of the Ammonite genus Kepplerites | ||||||||
| Upper boundary GSSP candidate section(s) |
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