Artinskian
Geologic period
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In the geologic timescale, the Artinskian is an age or stage of the Permian. It is a subdivision of the Cisuralian Epoch or Series. The Artinskian likely lasted between 290.1 and 283.5 million years ago according to the most recent revision of the... Wikipedia
Occurred: 290.1 (+/- 0.26) million years ago - 283.5 (+/- 0.6) million years ago
Epoch: Cisuralian
Lower boundary definition: FAD of the Conodont Sweetognathus whitei
Lower boundary GSSP: Dalny Tulkas section, Southern Ural Mountains, Russia; 53°55′29″N 56°30′58″E / 53.9247°N 56.51615°E
Lower GSSP ratified: February 2022