Eifelian
The Eifelian is one 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.
| Eifelian | |
|---|---|
| 393.3 ± 1.2 – 387.7 ± 0.8 Ma | |
| Chronology | |
Events of the Devonian Period -420 — – -415 — – -410 — – -405 — – -400 — – -395 — – -390 — – -385 — – -380 — – -375 — – -370 — – -365 — – -360 — – Key events of the Devonian Period. Axis scale: millions of years ago. | |
| 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 |
| GSSP ratified | 1985[4] |
| Upper boundary definition | FAD of the Conodont Polygnathus hemiansatus |
| Upper boundary GSSP | Jebel Mech Irdane, Tafilalt, Morocco 31.2374°N 4.3541°W |
| GSSP ratified | 1994[5] |
North American subdivisions of the Eifelian Stage include Southwood, and part of Cazenovia (or Cazenovian).
Name and definition
Named after the Eifel Hills located in Western Germany where the GSSP is exposed in the Wetteldorf Richtschnitt. [6]
Eifelian life
Arthropods
| Arthropods of the Eifelian | ||||
|---|---|---|---|---|
| Taxa | Presence | Location | Description | Images |
| Jaekelopterus | Klerf Formation, Rhineland, Germany Wyoming |
|||
| Hollardrops mesocristata | Mount Issoumour Formation, Morocco | |||
References
- Parry, S. F.; Noble, S. R.; Crowley, Q. G.; Wellman, C. H. (2011). "A high-precision U–Pb age constraint on the Rhynie Chert Konservat-Lagerstätte: time scale and other implications". Journal of the Geological Society. London: Geological Society. 168 (4): 863–872. doi:10.1144/0016-76492010-043.
- Kaufmann, B.; Trapp, E.; Mezger, K. (2004). "The numerical age of the Upper Frasnian (Upper Devonian) Kellwasser horizons: A new U-Pb zircon date from Steinbruch Schmidt(Kellerwald, Germany)". The Journal of Geology. 112 (4): 495–501. Bibcode:2004JG....112..495K. doi:10.1086/421077.
- Algeo, T. J. (1998). "Terrestrial-marine teleconnections in the Devonian: links between the evolution of land plants, weathering processes, and marine anoxic events". Philosophical Transactions of the Royal Society B: Biological Sciences. 353 (1365): 113–130. doi:10.1098/rstb.1998.0195.
- Ziegler, W.; Klapper, G. (June 1985). "Stages of the Devonian System" (PDF). Episodes. 8 (2): 104–109. doi:10.18814/epiiugs/1985/v8i2/006. Retrieved 18 December 2020.
- Walliser, O.; Bultynck, P.; Weddige, K.; Becker, R.; House, M. (September 1995). "Definition of the Eifelian-Givetian Stage boundary". Episodes. 18 (3): 107–115. doi:10.18814/epiiugs/1995/v18i3/002. Retrieved 19 December 2020.
- "GSSP for the Emsian - Eifelian Stage Boundary". stratigraphy. Retrieved 30 June 2017.
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