Early Triassic (jan 1, 240000000 BC – jan 1, 220000000 BC)
Description:
Oxygen levels are significantly lower due to the extinction of many land plants. Many corals went extinct, with reefs taking millions of years to re-form. Small ancestors to birds, mammals, and dinosaurs survive on the Pangaea supercontinent
Added to timeline:
Date:
jan 1, 240000000 BC
jan 1, 220000000 BC
~ 5883516 years