Geologic Periods
The eras and epochs when dinosaurs ruled the Earth.
Devonian Late
Paleozoic
382.7–358.9 Mya
0 dinosaurs
Carboniferous Late
Paleozoic
323.2–298.9 Mya
0 dinosaurs
Permian Late
Paleozoic
259.1–252.2 Mya
0 dinosaurs
Triassic Early
Mesozoic
252.2–247.2 Mya
2 dinosaurs
Triassic Middle
Mesozoic
247.2–237.0 Mya
15 dinosaurs
Triassic Late
Mesozoic
237.0–201.4 Mya
148 dinosaurs
Jurassic Early
Mesozoic
201.4–174.7 Mya
249 dinosaurs
Jurassic Middle
Mesozoic
174.7–161.5 Mya
143 dinosaurs
Jurassic Late
Mesozoic
161.5–145.0 Mya
261 dinosaurs
Cretaceous Early
Mesozoic
145.0–100.5 Mya
703 dinosaurs
Aptian
Mesozoic
125.0–113.0 Mya
0 dinosaurs
Cretaceous Late
Mesozoic
100.5–66.0 Mya
1230 dinosaurs
Maastrichtian
Mesozoic
72.1–66.0 Mya
0 dinosaurs
Paleocene
Cenozoic
66.0–56.0 Mya
0 dinosaurs
Eocene
Cenozoic
56.0–33.9 Mya
0 dinosaurs