Ludlow_Epoch
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Birth and death years unknown
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.
* Calculated from Wikipedia data.
Accuracy is not guaranteed.
| Ludlow | |||||||||||||
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.png) A map of Earth as it appeared 425 million years ago during the Ludlow Epoch, Ludfordian Age | |||||||||||||
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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°21′33″N 2°46′38″W / 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°01′40″N 14°19′30″E / 50.0277°N 14.3249°E | ||||||||||||
| Upper GSSP ratified | 1984 | ||||||||||||
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