Emsian
The Emsian is one of three faunal stages in the Early Devonian Epoch. It lasted from 407.6 ± 2.6 million years ago to 393.3 ± 1.2 million years ago. It was preceded by the Pragian Stage and followed by the Eifelian Stage. It is named after the Ems river in Germany. The GSSP is located in the Zinzil'ban Gorge in the Kitab State Geological Reserve of Uzbekistan, 35 centimetres (14 in) above the contact with the Madmon Formation.
| Emsian | |||||||||||||||||
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Paleogeography of the Emsian, 400 Ma | |||||||||||||||||
| Chronology | |||||||||||||||||
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| Etymology | |||||||||||||||||
| Name formality | Formal | ||||||||||||||||
| Name ratified | 1985 | ||||||||||||||||
| Usage information | |||||||||||||||||
| Celestial body | Earth | ||||||||||||||||
| Regional usage | Global (ICS) | ||||||||||||||||
| Time scale(s) used | ICS Time Scale | ||||||||||||||||
| Definition | |||||||||||||||||
| Chronological unit | Age | ||||||||||||||||
| Stratigraphic unit | Stage | ||||||||||||||||
| Time span formality | Formal | ||||||||||||||||
| Lower boundary definition | FAD of the conodont Polygnathus kitabicus | ||||||||||||||||
| Lower boundary GSSP | Zinzil'ban Gorge, Uzbekistan 39.2000°N 67.3056°E | ||||||||||||||||
| Lower GSSP ratified | 1995 | ||||||||||||||||
| Upper boundary definition | FAD of the conodont Polygnathus costatus partitus | ||||||||||||||||
| Upper boundary GSSP | Wetteldorf Richtschnitt section, Wetteldorf, Eifel, Germany 50.1496°N 6.4716°E | ||||||||||||||||
| Upper GSSP ratified | 1985 | ||||||||||||||||
In North America the Emsian Stage is represented by Sawkill or Sawkillian time.
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