252 Ma - 201 Ma
201 Ma - 145 Ma
145 Ma - 66 Ma
66 Ma - 23 Ma
23 Ma - 2.6 Ma
2.6 Ma - 0.00 Ma
Triassic
252 Ma - 201 Ma
Jurassic
201 Ma - 145 Ma
Cretaceous
145 Ma - 66 Ma
Paleogene
66 Ma - 23 Ma
Neogene
23 Ma - 2.6 Ma
Quaternary
2.6 Ma - 0.00 Ma
252 Ma
250 Ma
240 Ma
230 Ma
220 Ma
210 Ma
200 Ma
190 Ma
180 Ma
170 Ma
160 Ma
150 Ma
140 Ma
130 Ma
120 Ma
110 Ma
100 Ma
90 Ma
80 Ma
70 Ma
60 Ma
50 Ma
40 Ma
30 Ma
20 Ma
10 Ma
0.00 Ma
252 Ma
End-Permian extinction
Deep-time reset that opens the Triassic world.
233 Ma
First dinosaurs
Early dinosaurs appear in the Late Triassic.
201 Ma
End-Triassic extinction
A turnover event clears the way for Jurassic dominance.
150 Ma
First birds
Feathered dinosaur lineages give rise to birds.
130 Ma
Flowering plants spread
Angiosperms reshape food webs in the Cretaceous.
66 Ma
K-Pg extinction
Non-avian dinosaurs disappear at the end of the Cretaceous.
2.6 Ma
Ice ages begin
Glacial cycling defines the Quaternary.