Bajocian
Second age of the middle Jurassic / From Wikipedia, the free encyclopedia
In the geologic timescale, the Bajocian is an age and stage in the Middle Jurassic. It lasted from approximately 170.9 ±0.8 Ma to around 168.2 ±1.2 Ma (million years ago). The Bajocian Age succeeds the Aalenian Age and precedes the Bathonian Age.[4]
Quick Facts Chronology, Etymology ...
Bajocian | |||||||||
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170.9 ± 0.8 – 168.2 ± 1.2 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 | FAD of the Ammonites Hyperlioceras mundum, Hyperlioceras furcatum, Braunsina aspera, and Braunsina elegantula | ||||||||
Lower boundary GSSP | Cabo Mondego, Portugal 40.1992°N 8.9042°W / 40.1992; -8.9042 | ||||||||
Lower GSSP ratified | 1996[2] | ||||||||
Upper boundary definition | FAD of the Ammonite Gonolkites convergen | ||||||||
Upper boundary GSSP | Ravin du Bès, Bas-Auran, Alpes de Haute, France 43.9606°N 6.3153°E / 43.9606; 6.3153 | ||||||||
Upper GSSP ratified | July 2008[3] |
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