440 – 439 MA

Age · Llandovery

Aeronian

440–439 Ma

The Aeronian is an age within the Llandovery, spanning roughly 440 to 439 million years ago.

Rankage· Macrostrat
Base440 Ma· Macrostrat
Top439 Ma· Macrostrat
Duration1.9 Myr· Macrostrat
ChartICS International Chronostratigraphic Chart v2023/09 (ages from Macrostrat/PBDB interval tables)

Elsewhere

Cite this article

Stratum Study. "Aeronian" (Time interval). Stratum Study pack 2026.09, as of 2026-09-19. https://stratum.black/study/time/aeronian. Accessed 2026-09-20.

@misc{stratum-aeronian,
  title        = {Aeronian},
  author       = {{Stratum Study}},
  howpublished = {\url{https://stratum.black/study/time/aeronian}},
  year         = {2026},
  note         = {Time interval article, Stratum Study pack 2026.09, as of 2026-09-19; sources: stratum, macrostrat, 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.

Sources for this article: Stratum editorial (Stratum editorial);Macrostrat (CC-BY-4.0);Paleobiology Database (CC-BY-4.0). As of 2026-09-19; Study pack 2026.09. Data reproduced under the licences shown; text in Stratum's own words unless a section names its source.

Found an error? Write to drew@tyr.ac with the article id interval:aeronian.