-
Period: 541 BCE to 250 BCE
Palaeozoic ERA
Age of invertebrates -
Period: 539 BCE to 485 BCE
Cambrian
-
Period: 485 BCE to 444 BCE
Ordovician
widespread marine algaes -
450 BCE
widespread marine algae
-
Period: 443 BCE to 419 BCE
Silurian
-
Period: 419 BCE to 359 BCE
Devonian
-
Period: 359 BCE to 299 BCE
Carboniferous
-
Period: 299 BCE to 252 BCE
Permian
-
Period: 252 BCE to 66 BCE
Mesozoic ERA
-
Period: 251 BCE to 201 BCE
Triassic
-
Period: 201 BCE to 145 BCE
Jurassic
-
Period: 145 BCE to 66 BCE
Cretaceous
-
Period: 66 BCE to 1 BCE
Cenozoic ERA
-
Period: 66 BCE to 2 BCE
Tertiary
-
Period: 3 BCE to 50
Quaternary