Comparing Time

Era

Precambrian

4550 BC - 570 BC

Paleozoic

570 BC - 245 BC

Mesozoic

245 BC - 66 BC

Cenozoic

66 BC - 0 AD

Period

Cambrian

570 BC - 505 BC

Ordovician

505 BC - 436 BC

Silurian

436 BC - 406 BC

Devonian

406 BC - 360 BC

Mississipian

360 BC - 320 BC

Pennsylvanian

320 BC - 286 BC

Permian

286 BC - 245 BC

Triassic

245 BC - 206 BC

Jurassic

206 BC - 144 BC

Cretaceous

144 BC - 66 BC

Paleogene

66 BC - 24 BC

Neogene

24 BC - 2 BC

Quaternary

2 BC - 0 AD