Period · Paleozoic
Permian
299–252 Ma
The Permian is a period within the Paleozoic, spanning roughly 299 to 252 million years ago. Ends with the largest mass extinction; Texas Red Beds reptiles and Glass Mountains silicified brachiopods are Permian.
| Rank | period· Paleobiology Database |
|---|---|
| Base | 299 Ma· Paleobiology Database |
| Top | 252 Ma· Paleobiology Database |
| Duration | 47 Myr· Paleobiology Database |
| Chart | ICS International Chronostratigraphic Chart v2023/09 (ages from Macrostrat/PBDB interval tables) |
Elsewhere
Cite this article
Stratum Study. "Permian" (Time interval). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/time/permian. Accessed 2026-09-20.
@misc{stratum-permian,
title = {Permian},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/time/permian}},
year = {2026},
note = {Time interval article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, pbdb. Accessed 2026-09-20.}
} Citations carry the pack version and the article's as-of date so they resolve to the same text later. The facts themselves belong to the sources listed below; cite those for the science.