Ludlow Epoch
In the geological timescale, the Ludlow Epoch (from 427.4 ± 0.5 million years ago to 423.0 ± 2.3 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.
| Ludlow | |||||||||||||
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| Chronology | |||||||||||||
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| Etymology | |||||||||||||
| Name formality | Formal | ||||||||||||
| Name ratified | 1980 | ||||||||||||
| Usage information | |||||||||||||
| Celestial body | Earth | ||||||||||||
| Regional usage | Global (ICS) | ||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||
| Definition | |||||||||||||
| Chronological unit | Epoch | ||||||||||||
| Stratigraphic unit | Series | ||||||||||||
| Time span formality | Formal | ||||||||||||
| Lower boundary definition | FAD of the Graptolite Saetograptus (Colonograptus) varians | ||||||||||||
| Lower boundary GSSP | Pitch Coppice, Ludlow, U.K. 52.3592°N 2.7772°W | ||||||||||||
| Lower GSSP ratified | 1980 | ||||||||||||
| Upper boundary definition | FAD of the Graptolite Monograptus parultimus. | ||||||||||||
| Upper boundary GSSP | Požáry Section, Prague-Řeporyje, Czech Republic 50.0277°N 14.3249°E | ||||||||||||
| Upper GSSP ratified | 1984 | ||||||||||||
The Ludlow Epoch is subdivided into two stages: Gorstian and Ludfordian.
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