Jurassic
| Jurassic | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | ||||||||
Jurassic යනු මීට වසර මිලියන 201-145 කට පෙර, එනම් Mesozoic යුගයේ දෙවන කාල පරිච්ඡේදය වේ.
සටහන්
[සංස්කරණය]මූලාශ්ර
[සංස්කරණය]- ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy.
භාහිර සබැඳි
[සංස්කරණය]- Examples of Jurassic Fossils
- Jurassic (chronostratigraphy scale)
- Jurassic fossils in Harbury, Warwickshire
- Jurassic Microfossils: 65+ images of Foraminifera
- "Jurassic". එන්සයික්ලොපීඩියා බ්රිටැනිකා. 15 (11th ed.). 1911. With map and table.
