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.

System/ Period	Series/ Epoch	Stage/ Age	Age (Ma)
Carboniferous	Mississippian	Tournaisian	younger
Devonian	Upper/ Late	Famennian	358.9	372.2
	Upper/ Late	Frasnian	372.2	382.7
	Middle	Givetian	382.7	387.7
	Middle	Eifelian	387.7	393.3
	Lower/ Early	Emsian	393.3	407.6
		Pragian	407.6	410.8
		Lochkovian	410.8	419.2
Silurian	Pridoli	no faunal stages defined	older
Subdivision of the Devonian system according to the ICS, as of 2017.[1]

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. [2]

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

http://www.stratigraphy.org/index.php/ics-chart-timescale
"GSSP for the Emsian - Eifelian Stage Boundary". stratigraphy. Retrieved 30 June 2017.

Geological history of Earth

Cenozoic Era
(present–66.0 Mya)

Quaternary (present–2.588 Mya)	Holocene (present–11.784 kya) Pleistocene (11.784 kya–2.588 Mya)
Neogene (2.588–23.03 Mya)	Pliocene (2.588–5.333 Mya) Miocene (5.333–23.03 Mya)
Paleogene (23.03–66.0 Mya)	Oligocene (23.03–33.9 Mya) Eocene (33.9–56.0 Mya) Paleocene (56.0–66.0 Mya)

Mesozoic Era
(66.0–251.902 Mya)

Cretaceous (66.0–145.0 Mya)	Late (66.0–100.5 Mya) Early (100.5–145.0 Mya)
Jurassic (145.0–201.3 Mya)	Late (145.0–163.5 Mya) Middle (163.5–174.1 Mya) Early (174.1–201.3 Mya)
Triassic (201.3–251.902 Mya)	Late (201.3–237 Mya) Middle (237–247.2 Mya) Early (247.2–251.902 Mya)

Paleozoic Era
(251.902–541.0 Mya)

Permian (251.902–298.9 Mya)	Lopingian (251.902–259.8 Mya) Guadalupian (259.8–272.3 Mya) Cisuralian (272.3–298.9 Mya)
Carboniferous (298.9–358.9 Mya)	Pennsylvanian (298.9–323.2 Mya) Mississippian (323.2–358.9 Mya)
Devonian (358.9–419.2 Mya)	Late (358.9–382.7 Mya) Middle (382.7–393.3 Mya) Early (393.3–419.2 Mya)
Silurian (419.2–443.8 Mya)	Pridoli (419.2–423.0 Mya) Ludlow (423.0–427.4 Mya) Wenlock (427.4–433.4 Mya) Llandovery (433.4–443.8 Mya)
Ordovician (443.8–485.4 Mya)	Late (443.8–458.4 Mya) Middle (458.4–470.0 Mya) Early (470.0–485.4 Mya)
Cambrian (485.4–541.0 Mya)	Furongian (485.4–497 Mya) Miaolingian (497–509 Mya) Series 2 (509–521 Mya) Terreneuvian (521–541.0 Mya)

Proterozoic Eon
(541.0 Mya–2.5 Gya)

Neoproterozoic (541.0 Mya–1 Gya)	Ediacaran (541.0–~635 Mya) Cryogenian (~635–~720 Mya) Tonian (~720 Mya–1 Gya)
Mesoproterozoic (1–1.6 Gya)	Stenian (1–1.2 Gya) Ectasian (1.2–1.4 Gya) Calymmian (1.4–1.6 Gya)
Paleoproterozoic (1.6–2.5 Gya)	Statherian (1.6–1.8 Gya) Orosirian (1.8–2.05 Gya) Rhyacian (2.05–2.3 Gya) Siderian (2.3–2.5 Gya)

Archean Eon (2.5–4 Gya)

Eras	Neoarchean (2.5–2.8 Gya) Mesoarchean (2.8–3.2 Gya) Paleoarchean (3.2–3.6 Gya) Eoarchean (3.6–4 Gya)

Hadean Eon (4–4.6 Gya)

kya = thousands years ago. Mya = millions years ago. Gya = billions years ago.
See also: Geologic time scale

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