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Sakmarian
| Sakmarian | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chronology | |||||||||||||
| |||||||||||||
| Etymology | |||||||||||||
| Name formality | Formal | ||||||||||||
| Usage information | |||||||||||||
| Celestial body | Earth | ||||||||||||
| Regional usage | Global (ICS) | ||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||
| Definition | |||||||||||||
| Chronological unit | Age | ||||||||||||
| Stratigraphic unit | Stage | ||||||||||||
| Time span formality | Formal | ||||||||||||
| Lower boundary definition | FAD of the Conodont Mesogondolella monstra | ||||||||||||
| Lower boundary GSSP | Usolka section, Southern Ural Mountains, Russia 53°55′29″N 56°43′43″E / 53.9247°N 56.7287°E | ||||||||||||
| Lower GSSP ratified | 2018[2] | ||||||||||||
| Upper boundary definition | FAD of the Conodont Sweetognathus whitei | ||||||||||||
| Upper boundary GSSP | Dalny Tulkas section, Southern Ural Mountains, Russia 53°55′29″N 56°30′58″E / 53.9247°N 56.51615°E | ||||||||||||
| Upper GSSP ratified | February 2022[3] | ||||||||||||
In the geologic timescale, the Sakmarian is an age or stage of the Permian period. It is a subdivision of the Cisuralian Epoch or Series. The Sakmarian lasted between 293.52 and 290.1 million years ago (Ma). It was preceded by the Asselian and followed by the Artinskian.[4]
- ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. September 2023. Retrieved December 16, 2024.
- ^ Shen, Shuzhong (August 2018). "Notes from the SPS Chair" (PDF). Permophile: 4. ISSN 1684-5927. Retrieved 12 December 2020.
- ^ "Ratification of Artinskian GSSP". International Commission on Stratigraphy. Retrieved 23 March 2022.
- ^ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press
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