Permian
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Permian යනු වසර මිලියන 299-252 කට පෙර, එනම් Paleozoic යුගයේ හයවන සහ අවසාන කාලපරිච්ඡේදය වේ.
Quick Facts Chronology, Etymology ...
Permian | |||||||||||||
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298.9 ± 0.15 – 251.902 ± 0.024 Ma | |||||||||||||
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 | FAD of the Conodont Streptognathodus isolatus within the morphotype Streptognathodus wabaunsensis chronocline. | ||||||||||||
Lower boundary GSSP | Aidaralash, Ural Mountains, Kazakhstan 50.2458°N 57.8914°E / 50.2458; 57.8914 | ||||||||||||
GSSP ratified | 1996[2] | ||||||||||||
Upper boundary definition | FAD of the Conodont Hindeodus parvus. | ||||||||||||
Upper boundary GSSP | Meishan, Zhejiang, China 31.0798°N 119.7058°E / 31.0798; 119.7058 | ||||||||||||
GSSP ratified | 2001[3] |
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