Ludlow Epoch

EtymologyName formalityFormalName ratified1980Usage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitEpochStratigraphic unitSeriesTime span formalityFormalLower boundary definitionFAD of the GraptoliteLower boundary GSSP, Ludlow, U.K.
52°21′33″N2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772Lower GSSP ratified1980Upper boundary definitionFAD of the Graptolite Monograptus parultimus.Upper boundary GSSP, Prague-Řeporyje, Czech Republic
50°01′40″N14°19′30″E / 50.0277°N 14.3249°E / 50.0277; 14.3249Upper GSSP ratified1984

In the geological timescale, the Ludlow Epoch or Mid-Late Silurian (from 426.7 ± 1.5 million years ago to 422.7 ± 1.6 million years ago) occurred during the Silurian Period, after the end of the Homerian Age. It is named for the town of Ludlow in Shropshire, England.

The Ludlow Epoch is subdivided into two stages: Gorstian and Ludfordian.