Bajocian
Hierarchy: | Phanerozoic Mesozoic Jurassic Middle Jurassic Bajocian |
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Classification: | Age (as per International Commission on Stratigraphy) |
Top: | 168.3 ± 1.3 Ma |
Base: | 170.3 ± 1.4 Ma |
Preceeds: | Bathonian |
Follows: | Aalenian |
Name origin: | Named is from the Latin name (Bajocae) of the town of Bayeux, in the region of Normandy in France, introduced by French palaeontologist Alcide d'Orbigny in 1842. |
GSSP: | Murtinheira Section, Cabo Mondego, Portugal |
GSSP location: | 40.1992°N, 8.9042°W |
GSSP link: | View Global Boundary Stratotype Section and Point of the International Commission on Stratigraphy |
The base of the Bajocian stage is defined as the place in the stratigraphic column where fossils of the ammonite genus Hyperlioceras first appear.
The top of the Bajocian (the base of the Bathonian) is at the first appearance of ammonite species Parkinsonia convergens.
The top of the Bajocian (the base of the Bathonian) is at the first appearance of ammonite species Parkinsonia convergens.
Geologic Events
Event Name | Type | Age | Area |
---|---|---|---|
Pangaea breakup (ongoing) | Continental Breakup | 175 - 55 Ma | Global |
Andean orogeny (ongoing) | Orogeny | Maximum Age: 200 Ma | South America |
Laurasia supercontinent (ongoing) | Supercontinent | 215 - 55 Ma | Northern Hemisphere |
Overview of geological time
List all geological events