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[4] | ||||||||||||
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[4] | ||||||||||||
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[5][6] |
The Ludlow Epoch is subdivided into two stages: Gorstian and Ludfordian.
See also
References
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