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Neoarchaean

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TheNeoarchaean (Neoarchean) is the lastgeological era in theArchaean eon. It began 2.8billion years ago and ended 2.5 billion years ago.^[1] Before the Neoarchaean era was theMesoarchaean era and before thePalaeoproterozoic.

Oxygenic photosynthesis firstevolved in this era. This led to anoxygen catastrophe in thePalaeoproterozoic era. It was caused by apoisonous buildup of oxygen in theatmosphere. This was created by oxygen-producingphotoautotrophs that evolved in the Neoarchaean. Thesupercontinent Kenorland formed during this period, about 2.7 billion years ago.

↑"International Chronostratigraphic Chart"(PDF). International Commission on Stratigraphy. Retrieved6 July 2013.

Quaternary(the last 2.588 million years)	Holocene (the last 11,650 years) Pleistocene (11,650 years ago–2.588 million years ago)
Neogene(2.588 million years ago–23.03 mya)	Pliocene (2.588–5.333 mya) Miocene (5.333–23.03 mya)
Palaeogene(23.03 million years ago–66 mya)	Oligocene (23.03–33.9 mya) Eocene (33.9–56.0 mya) Palaeocene (56.0–66.0 mya)

Cretaceous(66 million years ago–145.0 mya)	Late (66.0–100.5 mya) Early (100.5–145.0 mya)
Jurassic(145 million years ago–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)

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)

Neoproterozoic era(541.0 mya–1 Gya)	Ediacaran (541.0–~635 mya) Cryogenian (~635–~720 mya) Tonian (~720 mya–1 Gya)
Mesoproterozoic era(1–1.6 Gya)	Stenian (1–1.2 Gya) Ectasian (1.2–1.4 Gya) Calymmian (1.4–1.6 Gya)
Palaeoproterozoic era(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)

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

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

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