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Late/Upper Jurassic | |||||||||
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![]() Map of Earth as it appeared 150 million years ago during the Late Jurassic, Kimmeridgian stage | |||||||||
Chronology | |||||||||
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Etymology | |||||||||
Chronostratigraphic name | Upper Jurassic | ||||||||
Geochronological name | Late Jurassic | ||||||||
Name formality | Formal | ||||||||
Usage information | |||||||||
Celestial body | Earth | ||||||||
Regional usage | Global (ICS) | ||||||||
Time scale(s) used | ICS Time Scale | ||||||||
Definition | |||||||||
Chronological unit | Epoch | ||||||||
Stratigraphic unit | Series | ||||||||
Time span formality | Formal | ||||||||
Lower boundary definition | Not formally defined | ||||||||
Lower boundary definition candidates | Horizon of the Ammonite Cardioceras redcliffense. | ||||||||
Lower boundary GSSP candidate section(s) | |||||||||
Upper boundary definition | Not formally defined | ||||||||
Upper boundary definition candidates |
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Upper boundary GSSP candidate section(s) | None |
The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 161.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.[2]
In European lithostratigraphy, the name "Malm" indicates rocks of Late Jurassic age.[3] In the past, Malm was also used to indicate the unit of geological time, but this usage is now discouraged to make a clear distinction between lithostratigraphic and geochronologic/chronostratigraphic units.
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