Archean
Archean
| Hierarchy: | Precambrian Archean | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Classification: | Eon (as per International Commission on Stratigraphy) | ||||||||
| Top: | 2500 Ma | ||||||||
| Base: | 4000 Ma | ||||||||
| Preceeds: | Proterozoic Siderian | ||||||||
| Follows: | Hadean Early Imbrian | ||||||||
| Primary Divisions: | NeoarcheanMesoarcheanPaleoarcheanEoarchean | ||||||||
| FGDC code: | A | ||||||||
| Fossil Record Data via PaleoBioDB Taxa Count Key First appearance Extinction First appearance and extinction Related precursors |
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Oxygen photosynthesis evolved leading the way for the later oxygen catastrophe, or Great Oxygenation Event.
Geologic Events
| Event Name | Type | Age | Area |
|---|---|---|---|
| Insel orogeny | Orogeny | 2650 ± 150 Ma | Antarctica |
| Algoman/Kenoran orogeny (concludes) | Orogeny | ~2700 - ~2500 Ma | North America |
| Pongola glaciation (concludes) | Glaciation Event | ~2900 - ~2780 Ma | Global |
| Lopian orogeny (concludes) | Orogeny | ~2900 - ~2800 Ma | Europe |
| Humboldt orogeny (concludes) | Orogeny | ~3000 Ma | Antarctica |
| Ur formation (concludes) | Continental Assembly | ~3100 Ma | Global |
| Great Oxygenation Event (concludes) | Major Climatic Event | ~3500 - ~850 Ma | Global |
| Rayner orogeny (concludes) | Orogeny | ~3500 Ma | Antarctica |
| Naiper orogeny | Orogeny | 4000 ± 200 Ma | Antarctica |
| Late Heavy Bombardment (concludes) | Impact Event | ~4100 - ~3800 Ma | Global |
| First life (concludes) | Evolutionary event | ~4280 - ~3500 Ma | Global |
Overview of geological time
List all geological events
