Epoch Late Ordovician Epoch

Time runs left (older) → right (younger) · Hover a card for details

Ends with Late Ordovician mass extinction (458.4-443.8 Ma).

458.40 Ma – 443.80 Ma · 14.60 Ma duration

Axis labels in Ma (millions of years ago) · Click a card for details

Late Ordovician Epoch 1

443.8 Ma End-Ordovician Extinction First major mass extinction Two-phase extinction driven by glaciation and sea level fall; ~85% of marine species lost.