Subperiod · Carboniferous
Pennsylvanian
323–299 Ma
The Pennsylvanian is a subperiod within the Carboniferous, spanning roughly 323 to 299 million years ago.
| Rank | subperiod· Paleobiology Database |
|---|---|
| Base | 323 Ma· Paleobiology Database |
| Top | 299 Ma· Paleobiology Database |
| Duration | 24.3 Myr· Paleobiology Database |
| Chart | ICS International Chronostratigraphic Chart v2023/09 (ages from Macrostrat/PBDB interval tables) |
Elsewhere
Cite this article
Stratum Study. "Pennsylvanian" (Time interval). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/time/pennsylvanian. Accessed 2026-09-20.
@misc{stratum-pennsylvanian,
title = {Pennsylvanian},
author = {{Stratum Study}},
howpublished = {\url{https://stratum.black/study/time/pennsylvanian}},
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.