Epoch Early Ordovician Epoch

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

Great Ordovician Biodiversification Event begins (485.4-470 Ma).

485.40 Ma – 470.00 Ma · 15.40 Ma duration

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

Early Ordovician Epoch 1

470 Ma First Coral Reefs Ordovician reef systems First significant coral-stromatoporoid reef systems in shallow Ordovician seas.