Stratum.black Open reference
427 – 423 MA

Epoch · Silurian

Ludlow

427–423 Ma

The Ludlow is an epoch within the Silurian, spanning roughly 427 to 423 million years ago.

Rankepoch· Paleobiology Database
Base427 Ma· Paleobiology Database
Top423 Ma· Paleobiology Database
Duration4.4 Myr· Paleobiology Database
ChartICS International Chronostratigraphic Chart v2023/09 (ages from Macrostrat/PBDB interval tables)

Contains

Part of

Elsewhere

Cite this article

Stratum Strata. "Ludlow" (Time interval). Stratum Strata pack 2026.09, as of 2026-09-21. https://stratum.black/strata/time/ludlow. Accessed 2026-09-21.

BibTeX · CSL-JSON

@misc{stratum-ludlow,
  title        = {Ludlow},
  author       = {{Stratum Strata}},
  howpublished = {\url{https://stratum.black/strata/time/ludlow}},
  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.

Sources for this article: Stratum editorial (Stratum editorial);Paleobiology Database (CC-BY-4.0). As of 2026-09-21; Strata 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:ludlow.

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