Sakmarian
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.
| 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 53.9247°N 56.7287°E | ||||||||||||
| Lower GSSP ratified | 2018 | ||||||||||||
| Upper boundary definition | FAD of the Conodont Sweetognathus whitei | ||||||||||||
| Upper boundary GSSP | Dalny Tulkas section, Southern Ural Mountains, Russia 53.9247°N 56.51615°E | ||||||||||||
| Upper GSSP ratified | February 2022 | ||||||||||||
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.