Mesoarchean
Mesoarchean
| Hierarchy: | Precambrian Archean Mesoarchean | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Classification: | Era (as per International Commission on Stratigraphy) | ||||||||
| Top: | 2800 Ma | ||||||||
| Base: | 3200 Ma | ||||||||
| Preceeds: | Neoarchean | ||||||||
| Follows: | Paleoarchean | ||||||||
| GSSP: | Defined chronometrically | ||||||||
| Fossil Record Data via PaleoBioDB Taxa Count Key First appearance Extinction First appearance and extinction Related precursors |
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First stromatolites (probably colonial cyanobacteria). Oldest macrofossils. Humboldt Orogeny in Antarctica. Blake River Megacaldera Complex begins to form in present-day Ontario and Quebec, ends by roughly 2696 Ma.
Geologic Events
| Event Name | Type | Age | Area |
|---|---|---|---|
| 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 |
Overview of geological time
List all geological events