Jurassic යනු මීට වසර මිලියන 201-145 කට පෙර, එනම් Mesozoic යුගයේ දෙවන කාල පරිච්ඡේදය වේ.
Jurassic | |||||||||
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Chronology | |||||||||
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Etymology | |||||||||
Name formality | Formal | ||||||||
Usage information | |||||||||
Regional usage | Global (ICS) | ||||||||
Time scale(s) used | ICS Time Scale | ||||||||
Definition | |||||||||
Chronological unit | Period | ||||||||
Stratigraphic unit | System | ||||||||
Time span formality | Formal | ||||||||
Lower boundary definition | First appearance of the ammonite Psiloceras spelae tirolicum. | ||||||||
Lower boundary GSSP | Kuhjoch section, Karwendel mountains, Northern Calcareous Alps, Austria 47°29′02″N 11°31′50″E / 47.4839°N 11.5306°E | ||||||||
GSSP ratified | 2010 | ||||||||
Upper boundary definition | Not formally defined | ||||||||
Upper boundary definition candidates |
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Upper boundary GSSP candidate section(s) | None |
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