Ans- most recent to oldest
1- extinction of dinosaurs (Cretaceous-Tertiary boundary)
2- evolution of Trilobites (Cambrian)
3- evolution of stromatolite
4- formation of Banded Iron formations
5- oxygenation in the atmosphere
2. Mara Mam 69 3. (oldest) Trendell tocelity 7. Put these events from Earth's history in...