Jurassic
Jurassic
Gymnosperms (especially conifers, Bennettitales and cycads) and ferns common. Many types of dinosaurs, such as sauropods, carnosaurs, and stegosaurs. Mammals common but small. First birds and lizards. Ichthyosaurs and plesiosaurs diverse. Bivalves, Ammonites and belemnites abundant. Sea urchins very common, along with crinoids, starfish, sponges, and terebratulid and rhynchonellid brachiopods.
Breakup of Pangaea into Gondwana and Laurasia.
Nevadan orogeny in North America. Rantigata and Cimmerian Orogenies taper off.
Atmospheric CO2 levels 4–5 times the present day levels (1200–1500 ppmv, compared to today's 385 ppmv).
Breakup of Pangaea into Gondwana and Laurasia.
Nevadan orogeny in North America. Rantigata and Cimmerian Orogenies taper off.
Atmospheric CO2 levels 4–5 times the present day levels (1200–1500 ppmv, compared to today's 385 ppmv).
Geologic Events
| Event Name | Type | Age | Area |
|---|---|---|---|
| Morokweng impact | Impact Event | 145.0 ± 0.8 Ma | South Africa |
| Pangaea breakup (begins) | Continental Breakup | 175 - 55 Ma | Global |
| Andean orogeny (begins) | Orogeny | Maximum Age: 200 Ma | South America |
| Laurasia supercontinent (ongoing) | Supercontinent | 215 - 55 Ma | Northern Hemisphere |
| Uralian orogeny (concludes) | Orogeny | ~320 - ~175 Ma | Russia |
Overview of geological time
List all geological events
