Pennsylvanian
Pennsylvanian
Winged insects radiate suddenly; some (esp. Protodonata and Palaeodictyoptera) are quite large. Amphibians common and diverse. First reptiles and coal forests (scale trees, ferns, club trees, giant horsetails, Cordaites, etc.). Highest-ever atmospheric oxygen levels.Goniatites, brachiopods, bryozoa, bivalves, and corals plentiful in the seas and oceans. Testate forams proliferate. Uralian orogeny in Europe and Asia. Variscan orogeny occurs towards middle and late Mississippian Periods.
Geologic Events
| Event Name | Type | Age | Area |
|---|---|---|---|
| Mauritanide Belt orogeny (concludes) | Orogeny | ~320 - ~270 Ma | West Africa |
| Uralian orogeny (concludes) | Orogeny | ~320 - ~175 Ma | Russia |
| Pangaea assembly (ongoing) | Continental Assembly | 335 - 272 Ma | Global |
| Variscan/Hercynian orogeny (concludes) | Orogeny | ~400 - ~280 Ma | Europe/North America |
Overview of geological time
List all geological events
