Ordovician–Silurian extinction
~443 mya · Event
First of the 'Big Five' mass extinctions; about 85% of marine species die out.
On these timelines: Master, The Age of Dinosaurs
Around 443000000 BCE
- First vascular plants (425000000 BCE)
- Devonian Period (419000000 BCE)
- Ordovician Period (485000000 BCE)
- Silurian Period (443000000 BCE)