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 Strata. "Permian" (Time interval). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/time/permian. Accessed 2026-09-21.
@misc{stratum-permian,
title = {Permian},
author = {{Stratum Strata}},
howpublished = {\url{https://stratum.black/strata/time/permian}},
year = {2026},
note = {Time interval article, Stratum Strata pack 2026.09, as of 2026-09-21; sources: stratum, pbdb. Accessed 2026-09-21.}
} 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.