Period · Cenozoic
Paleogene
66–23 Ma
The Paleogene is a period within the Cenozoic, spanning roughly 66 to 23 million years ago. Recovery after the extinction; Green River fish, London Clay and Khouribga's later phosphate beds are Paleogene.
| Rank | period· Paleobiology Database |
|---|---|
| Base | 66 Ma· Paleobiology Database |
| Top | 23 Ma· Paleobiology Database |
| Duration | 43 Myr· Paleobiology Database |
| Chart | ICS International Chronostratigraphic Chart v2023/09 (ages from Macrostrat/PBDB interval tables) |
Elsewhere
Cite this article
Stratum Study. "Paleogene" (Time interval). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/time/paleogene. Accessed 2026-09-20.
@misc{stratum-paleogene,
title = {Paleogene},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/time/paleogene}},
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.