Neoarchaean facts for kids
The Neoarchaean (Neoarchean) is the last geological era in the Archaean eon. It began 2.8 billion years ago and ended 2.5 billion years ago. Before the Neoarchaean era was the Mesoarchaean era and before the Palaeoproterozoic.
Oxygenic photosynthesis first evolved in this era. This led to an oxygen catastrophe in the Palaeoproterozoic era. It was caused by a poisonous buildup of oxygen in the atmosphere. This was created by oxygen-producing photoautotrophs that evolved in the Neoarchaean. The supercontinent Kenorland formed during this period, about 2.7 billion years ago.
| Precambrian (4.567 gya – 541 mya) | |
|---|---|
| In the left column are Eons, bold are Eras, not bold are Periods. gya = billion years ago, mya = million years ago | |
| Hadean (4.567 gya – 4 gya) | Chaotian Zirconian |
| Archaean (4 gya – 2.5 gya) | Eoarchaean (4 gya – 3.6 gya)
Palaeoarchaean (3.6 gya – 3.2 gya) Mesoarchaean (3.2 gya – 2.8 gya) Neoarchaean (2.8 gya – 2.5 gya) |
| Proterozoic (2.5 gya – 541 mya) | Palaeoproterozoic (2.5 gya – 1.6 gya) Siderian (2.5 gya – 2.3 gya) Rhyacian (2.3 gya – 2.05 gya) Orosirian (2.05 gya – 1.8 gya) Statherian (1.8 gya – 1.6 gya)
Mesoproterozoic (1.6 gya – 1 gya) Calymmian (1.6 gya – 1.4 gya) Ectasian (1.4 gya – 1.2 gya) Stenian (1.2 gya – 1 gya) Neoproterozoic (1 gya - 541 mya) Tonian (1 gya – 720 mya) Cryogenian (720 mya – 635 mya) Ediacaran (635 mya – 541 mya) |
Images for kids
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The graph above illustrates the increase of oxygen in Earth's atmosphere since shortly before the start of the Neoarchean era.
See also
In Spanish: Era Neoarcaica para niños
