Tonian
Tonian
| Hierarchy: | Precambrian Proterozoic Neoproterozoic Tonian | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Classification: | Period (as per International Commission on Stratigraphy) | ||||||||
| Top: | 720 Ma | ||||||||
| Base: | 1000 Ma | ||||||||
| Preceeds: | Cryogenian | ||||||||
| Follows: | Mesoproterozoic Stenian | ||||||||
| GSSP: | Defined chronometrically | ||||||||
| Fossil Record Data via PaleoBioDB Taxa Count Key First appearance Extinction First appearance and extinction Related precursors |
|
Rodinia supercontinent persists. Trace fossils of simple multi-celled eukaryotes. First radiation of dinoflagellate-like acritarchs. Grenville Orogeny tapers off in North America. Pan-African orogeny in Africa. Lake Ruker / Nimrod Orogeny in Antarctica, 1000 ± 150 Ma. Edmundian Orogeny (c. 920 – 850 Ma),Gascoyne Complex, Western Australia. Adelaide Geosyncline laid down on Australian continent, beginning of Adelaide Geosyncline (Delamerian Orogeny) in that continent.
Geologic Events
| Event Name | Type | Age | Area |
|---|---|---|---|
| Rodinia breakup (begins) | Continental Breakup | 750 - 633 Ma | Global |
| Pannotia supercontinent (begins) | Supercontinent | 750 - 530 Ma | Global |
| Pan-African orogeny (concludes) | Orogeny | ~870 - ~550 Ma | Africa |
| Zambezi Belt orogeny (early) (concludes) | Orogeny | ~890 - ~880 Ma | Zambia and Zimbabwe |
| Late Ruker / Nimrod orogeny | Orogeny | 1000 ± 150 Ma | Antarctica |
| Grenville orogeny (concludes) | Orogeny | 1250 - 980 Ma | Northern America, Scotland |
| Sveconorwegian orogeny (concludes) | Orogeny | ~1250 - ~900 Ma | Europe |
| Rodinia assembly (concludes) | Continental Assembly | ~1300 - ~900 Ma | Global |
| Kibaran orogeny (concludes) | Orogeny | 1400 - 1000 Ma | Mid to Southern Africa |
| Great Oxygenation Event (concludes) | Major Climatic Event | ~3500 - ~850 Ma | Global |
Overview of geological time
List all geological events
