Time Divisions of Earth's History

Era

Period

Epoch

Paleozoic
1. Pre-Cambrian
2. Cambrian
3. Ordovician
4. Silurian
5. Devonian
6. Carboniferous
  1. Mississippian (North America)
  2. Pennsylvanian (North America)
7. Permian
Mesozoic
1. Triassic
  1. Carnian
  2. Norian
  3. Rhaeton
2. Jurassic
  1. Hettangian
  2. Sinemurian
  3. Pliensbachian
  4. Toarcian
  5. Bajocian
  6. Bathonian
  7. Callovian
  8. Oxfordian
  9. Kimmeridgian
  10. Portlandian
  11. Purbeckian
3. Cretaceous
  1. Ryazanian
  2. Valanginian
  3. Hauterivian
  4. Barrenmian
  5. Aptian
  6. Albian
  7. Cenomanian
  8. Turonian
  9. Coniacian
  10. Santonian
  11. Campanian
  12. Maastrichtian
Cenozoic
1. Paleogene
  1. Paleocene
  2. Eocene
  3. Oligocene
2. Neogene
  1. Miocene
  2. Pliocene
3. Quaternary
  1. Pleistocene
  2. Halocene

Time Divisions of Earth’s History