Eifelian
Fourth stage of the Devonian and first stage of the Middle Devonian / From Wikipedia, the free encyclopedia
The Eifelian is the first of two faunal stages in the Middle Devonian Epoch. It lasted from 393.3 ± 1.2 million years ago to 387.7 ± 0.8 million years ago. It was preceded by the Emsian Stage and followed by the Givetian Stage.
Quick Facts Chronology, Etymology ...
Eifelian | |||||||||||||||||
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393.3 ± 1.2 – 387.7 ± 0.8 Ma | |||||||||||||||||
Chronology | |||||||||||||||||
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Etymology | |||||||||||||||||
Name formality | Formal | ||||||||||||||||
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 costatus partitus | ||||||||||||||||
Lower boundary GSSP | Wetteldorf Richtschnitt section, Wetteldorf, Eifel, Germany 50.1496°N 6.4716°E / 50.1496; 6.4716 | ||||||||||||||||
Lower GSSP ratified | 1985[5] | ||||||||||||||||
Upper boundary definition | FAD of the conodont Polygnathus hemiansatus | ||||||||||||||||
Upper boundary GSSP | Jebel Mech Irdane, Tafilalt, Morocco 31.2374°N 4.3541°W / 31.2374; -4.3541 | ||||||||||||||||
Upper GSSP ratified | 1994[6] |
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North American subdivisions of the Eifelian Stage include Southwood, and part of Cazenovia (or Cazenovian).