Ordovician–Silurian extinction
Extinción del Ordovícico-Silúrico
- Date
- c. 445 Ma · confidence medium
- Place
- Dob's Linn, Scotland, United Kingdom
- Credited to
- Natural event
- Field
- Life & health
What was discovered
A short, intense glaciation wipes out about 85% of marine species: the first of the big five extinctions. Dob's Linn holds the boundary between the two periods.
Planetary event (F5), verified against sources on 25-09-2026.
What it led to
- Silurian recovery