First dinosaurs (Ischigualasto)
Primeros dinosaurios (Ischigualasto)
- Date
- c. 231 Ma · confidence medium
- Place
- Ischigualasto Provincial Park, San Juan, Argentina
- Credited to
- Natural event
- Field
- Life & health
What was discovered
Ischigualasto preserves some of the oldest dinosaurs, such as Eoraptor and Herrerasaurus, still small among other Triassic reptiles.
Planetary event (F5), verified against sources on 25-09-2026.
What it led to
- Dominance of the dinosaurs