Neoarchean - Mashpedia All-in-One Encyclopedia

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The Neoarchean (pron.: /ˌniː.oʊ.ɑrˈkiː.ən/; also spelled Neoarchaean) is a geologic era within the Archaean. It spans the period of time from 2,800 to 2,500 million years ago—the period being defined chronometrically and not referenced to a specific level in a rock section on Earth. Oxygenic photosynthesis first evolved in this era and was accountable for the oxygen catastrophe which was to happen later in the Paleoproterozoic from a poisonous buildup of oxygen in the atmosphere, produced by these oxygen producing photoautotrophs, which evolved earlier in the Neoarchean. The supercontinent Kenorland formed during this period, about 2,700 million years ago.

Archean Eon
Eoarchean	Paleoarchean	Mesoarchean	Neoarchean

Geologic history of Earth

Precambrian supereon (4.567 Gya – 541 Mya)

In left column are eons; right column: bold are eras; not bold are periods:

Hadean (4.567 – 4 Gya)	Chaotian (4.567 - 4.4 Gya) Zirconian (4.4 - 4 Gya)

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

Proterozoic (2.5 Gya – 541 Mya)	Paleoproterozoic (2.5 – 1.6 Gya): Siderian (2.5 – 2.3 Gya) · Rhyacian (2.3 – 2.05 Gya) · Orosirian (2.05 – 1.8 Gya) · Statherian (1.8 – 1.6 Gya) Mesoproterozoic (1.6 – 1 Gya): Calymmian (1.6 – 1.4 Gya) · Ectasian (1.4 – 1.2 Gya) · Stenian (1.2 – 1 Gya) Neoproterozoic (1 Gya – 541 Mya): Tonian (1 Gya – 850 Mya) · Cryogenian (850 – 635 Mya) · Ediacaran (635 – 541 Mya)

Mya = millions years ago. Gya = billions years ago.

Phanerozoic eon (541.0 – 0 Mya)

In horizontal bars are eras; in left column are periods; right column: bold are epochs; not bold not italic are ages; italic are chrons:

Paleozoic (541.0 – 252.2 Mya)

Cambrian (541.0 – 485.4 Mya)	Terreneuvian (541.0 – 521 Mya): Fortunian (541.0 – 529 Mya) · Age 2* (529 – 521 Mya) *Epoch 2 (521 – 509 Mya)*: Age 3 (521 – 514 Mya) · Age 4* (514 – 509 Mya) *Epoch 3 (509 – 497 Mya)*: Age 5 (509 – 504.5 Mya) · Drumian (504.5 – 500.5 Mya) · Guzhangian (500.5 – 497 Mya) Furongian (497 – 485.4 Mya): Paibian (497 – 494 Mya) · Jiangshanian (494 – 489.5 Mya) · Age 10* (489.5 – 485.4 Mya)

Ordovician (485.4 – 443.4 Mya)	Lower Ordovician (485.4 – 470.0 Mya): Tremadocian (485.4 – 477.7 Mya) · Floian (477.7 – 470.0 Mya) Middle Ordovician (470.0 – 458.4 Mya): Dapingian (470.0 – 467.3 Mya) · Darriwilian (467.3 – 458.4 Mya) Upper Ordovician (458.4 – 443.4 Mya): Sandbian (458.4 – 453.0 Mya) · Katian (453.0 – 445.2 Mya) · Hirnantian (445.2 – 443.4 Mya)

Silurian (443.4 – 419.2 Mya)	Llandovery (443.4 – 433.4 Mya): Rhuddanian (443.4 – 440.8 Mya) · Aeronian (440.8 – 438.5 Mya) · Telychian (438.5 – 433.4 Mya) Wenlock (433.4 – 427.4 Mya): Sheinwoodian (433.4 – 430.5 Mya) · Homerian (430.5 – 427.4 Mya) Ludlow (427.4 – 423.0 Mya): Gorstian (427.4 – 425.6 Mya) · Ludfordian (425.6 – 423.0 Mya) Pridoli (423.0 – 419.2 Mya)

Devonian (419.2 – 358.9 Mya)	Lower Devonian (419.2 – 393.3 Mya): Lochkovian (419.2 – 410.8 Mya) · Pragian (410.8 – 407.6 Mya) · Emsian (407.6 – 393.3 Mya) Middle Devonian (393.3 – 382.7 Mya): Eifelian (393.3 – 387.7 Mya) · Givetian (387.7 – 382.7 Mya) Upper Devonian (382.7 – 358.9 Mya): Frasnian (382.7 – 372.2 Mya) · Famennian (372.2 – 358.9 Mya)

Carboniferous (358.9 – 298.9 Mya)	Mississippian (358.9 – 323.2 Mya): Tournaisian (358.9 – 346.7 Mya) · Viséan (346.7 – 330.9 Mya) · Serpukhovian (330.9 – 323.2 Mya) Pennsylvanian (323.2 – 298.9 Mya): Bashkirian (323.2 – 315.2 Mya) · Moscovian (315.2 – 307.0 Mya) · Kasimovian (307.0 – 303.7 Mya) · Gzhelian (303.7 – 298.9 Mya)

Permian (298.9 – 252.2 Mya)	Cisuralian (298.9 – 272.3 Mya): Asselian (298.9 – 295.5 Mya) · Sakmarian (295.5 – 290.1 Mya) · Artinskian (290.1 – 279.3 Mya) · Kungurian (279.3 – 272.3 Mya) Guadalupian (272.3 – 259.9 Mya): Roadian (272.3 – 268.8 Mya) · Wordian (268.8 – 265.1 Mya) · Capitanian (265.1 – 259.9 Mya) Lopingian (259.9 – 252.2 Mya): Wuchiapingian (259.9 – 254.2 Mya) · Changhsingian (254.2 – 252.2 Mya)

Mesozoic (252.2 – 66.0 Mya)

Triassic (252.2 – 201.3 Mya)	Lower Triassic (252.2 – 247.2 Mya): Induan (252.2 – 251.2 Mya) · Olenekian (251.2 – 247.2 Mya) Middle Triassic (247.2 – 235 Mya): Anisian (247.2 – 242 Mya) · Ladinian (242 – 235 Mya) Upper Triassic (235 – 201.3 Mya): Carnian (235 – 228 Mya) · Norian (228 – 208.5 Mya) · Rhaetian (208.5 – 201.3 Mya)

Jurassic (201.3 – 145.0 Mya)	Lower Jurassic (201.3 – 174.1 Mya): Hettangian (201.3 – 199.3 Mya) · Sinemurian (199.3 – 190.8 Mya) · Pliensbachian (190.8 – 182.7 Mya) · Toarcian (182.7 – 174.1 Mya) Middle Jurassic (174.1 – 163.5 Mya): Aalenian (174.1 – 170.3 Mya) · Bajocian (170.3 – 168.3 Mya) · Bathonian (168.3 – 166.1 Mya) · Callovian (166.1 – 163.5 Mya) Upper Jurassic (163.5 – 145.0 Mya): Oxfordian (163.5 – 157.3 Mya) · Kimmeridgian (157.3 – 152.1 Mya) · Tithonian (152.1 – 145.0 Mya)

Cretaceous (145.0 – 66.0 Mya)	Lower Cretaceous (145.0 – 100.5 Mya): Berriasian (145.0 – 139.8 Mya) · Valanginian (139.8 – 132.9 Mya) · Hauterivian (132.9 – 129.4 Mya) · Barremian (129.4 – 125.0 Mya) · Aptian (125.0 – 113.0 Mya) · Albian (113.0 – 100.5 Mya) Upper Cretaceous (100.5 – 66.0 Mya): Cenomanian (100.5 – 93.9 Mya) · Turonian (93.9 – 89.8 Mya) · Coniacian (89.8 – 86.3 Mya) · Santonian (86.3 – 83.6 Mya) · Campanian (83.6 – 72.1 Mya) · Maastrichtian (72.1 – 66.0 Mya)

Cenozoic (66.0 – 0 Mya)

Paleogene, Neogene and early Pleistocene comprise former Tertiary* (66.0 – 1.8 Mya) period. Gelasian and Calabrian comprise Early Pleistocene (2.588 Mya – 781 kya) subepoch.

Paleogene (66.0 – 23.03 Mya)	Paleocene (66.0 – 56.0 Mya): Danian (66.0 – 61.6 Mya) · Selandian (61.6 – 59.2 Mya) · Thanetian (59.2 – 56.0 Mya) Eocene (56.0 – 33.9 Mya): Ypresian (56.0 – 47.8 Mya) · Lutetian (47.8 – 41.3 Mya) · Bartonian (41.3 – 38.0 Mya) · Priabonian (38.0 – 33.9 Mya) Oligocene (33.9 – 23.03 Mya): Rupelian (33.9 – 28.1 Mya) · Chattian (28.1 – 23.03 Mya)

Neogene (23.03 – 2.588 Mya)	Miocene (23.03 – 5.333 Mya): Aquitanian (23.03 – 20.44 Mya) · Burdigalian (20.44 – 15.97 Mya) · Langhian (15.97 – 13.82 Mya) · Serravallian (13.82 – 11.62 Mya) · Tortonian (11.62 – 7.246 Mya) · Messinian (7.246 – 5.333 Mya) Pliocene (5.333 – 2.588 Mya): Piacenzian (5.333 – 3.600 Mya) · Zanclean (3.600 – 2.588 Mya)

Quaternary (2.588 – 0 Mya)	Pleistocene (2.588 Mya – 11.7 kya): Gelasian (2.588 – 1.806 Mya) · Calabrian (1.806 Mya – 781 kya) · Middle Pleistocene / Ionian (781 – 126 kya) · Late Pleistocene / Tarantian (126 – 11.7 kya): Oldest Dryas (18 – 14.67 kya) · Bølling* (14.67 – 14 kya) · Older Dryas* (14 – 13.7 kya) · Allerød* (13.7 – 12.8 kya) · Younger Dryas* (12.8 – 11.7 kya)* Holocene (11.7 – 0 kya): Preboreal (11.7 – 9 kya) · Boreal* (9 – 8 kya) · Atlantic* (8 – 5 kya) · Subboreal* (5 – 2.5 kya) · Subatlantic* (2.5 – 0 kya)*