Geologic time scale

Table of Contents

Archean Eon

Proterozoic Eon

Phanerozoic Eon

Hadean Eon

(4000 million years ago)

Archean Eon

Eoarchean Era (3800 million years ago)
Paleoarchean Era (3600 million years ago)
Mesoarchean Era (3200 million years ago)
Neoarchean Era (2800 million years ago)

Proterozoic Eon

Paleoproterozoic Era
- Siderian Period (2500 million years ago)
- Rhyacian Period (2300 million years ago)
- Orosirian Period (2050 million years ago)
- Statherian Period (1800 million years ago)
Mesoproterozoic Era
- Calymmian Period (1600 million years ago)
- Ectasian Period (1400 million years ago)
- Stenian Period (1200 million years ago)
Neoproterozoic Era
- Tonian Period (1000 million years ago)
- Cryogenian Period (850 million years ago)
- Ediacaran Period (630 million years ago)

Phanerozoic Eon

Paleozoic Era
- Cambrian Period (542 million years ago)
- Ordovician Period (488.3 million years ago)
- Silurian Period (443.7 million years ago)
- Devonian Period (416 million years ago)
- Carboniferous Period
  - Mississippian Epoch
    - Tournaisian Age (359.2 million years ago)
    - Viséan Age (345.3 million years ago)
    - Serpukhovian Age (328.3 million years ago)
  - Pennsylvanian Epoch
    - Bashkirian Age (318.1 million years ago)
    - Moscovian Age (311.7 million years ago)
    - Kasimovian Age (306.5 million years ago)
    - Gzhelian Age (303.9 million years ago)
- Permian Period
  - Cisuralian Epoch
    - Asselian Age (299 million years ago)
    - Sakmarian Age (294.6 million years ago)
    - Artinskian Age (284.4 million years ago)
    - Kungurian Age (275.6 million years ago)
  - Guadalupian Epoch
    - Roadian Age (270.6 million years ago)
    - Wordian Age (268 million years ago)
    - Capitanian Age (265.8 million years ago)
  - Lopingian Epoch
    - Wuchiapingian Age (260.4 million years ago)
    - Changhsingian Age (253.8 million years ago)
Mesozoic Era
- Triassic Period
  - Early Triassic Epoch
    - Induan Age (251 million years ago)
    - Olenekian Age (249.7 million years ago)
  - Middle Triassic Epoch
    - Anisian Age (245 million years ago)
    - Ladinian Age (237 million years ago)
  - Late Triassic Epoch
    - Carnian Age (228 million years ago)
    - Norian Age (216.5 million years ago)
    - Rhaetian Age (203.6 million years ago)
- Jurassic Period
  - Early Jurassic Epoch
    - Hettangian Age (199.6 million years ago)
    - Sinemurian Age (196.5 million years ago)
    - Pliensbachian Age (189.6 million years ago)
    - Toarcian Age (183 million years ago)
  - Middle Jurassic Epoch
    - Aalenian Age (175.6 million years ago)
    - Bajocian Age (171.6 million years ago)
    - Bathonian Age (167.7 million years ago)
    - Callovian Age (164.7 million years ago)
  - Late Jurassic Epoch
    - Oxfordian Age (161.2 million years ago)
    - Kimmeridgian Age (155.7 million years ago)
    - Tithonian Age (150.8 million years ago)
- Cretaceous Period
  - Early Cretaceous Epoch
    - Berriasian Age (145.5 million years ago)
    - Valanginian Age (140.2 million years ago)
    - Hauterivian Age (136.4 million years ago)
    - Barremian Age (130 million years ago)
    - Aptian Age (125 million years ago)
    - Albian Age (112 million years ago)
  - Late Cretaceous Epoch
    - Cenomanian Age (99.6 million years ago)
    - Turonian Age (93.5 million years ago)
    - Coniacian Age (89.3 million years ago)
    - Santonian Age (85.8 million years ago)
    - Campanian Age (83.5 million years ago)
    - Maastrichtian Age (70.6 million years ago)
Cenozoic Era
- Paleogene Period
  - Paleocene Epoch
    - Danian Age (65.5 million years ago)
    - Selandian Age (61.7 million years ago)
    - Thanetian Age (58.7 million years ago)
  - Eocene Epoch
    - Ypresian Age (55.8 million years ago)
    - Lutetian Age (48.6 million years ago)
    - Bartonian Age (40.4 million years ago)
    - Priabonian Age (37.2 million years ago)
  - Oligocene Epoch
    - Rupelian Age (33.9 million years ago)
    - Chattian Age (28.4 million years ago)
- Neogene Period
  - Miocene Epoch
    - Aquitanian Age (23.03 million years ago)
    - Burdigalian Age (20.43 million years ago)
    - Langhian Age (15.97 million years ago)
    - Serravallian Age (13.65 million years ago)
    - Tortonian Age (11.608 million years ago)
    - Messinian Age (7.246 million years ago)
  - Pliocene Epoch
    - Zanclean Age (5.332 million years ago)
    - Piacenzian Age (3.6 million years ago)
- Quaternary Period
  - Pleistocene Epoch
    - Gelasian Age (2.588 million years ago)
    - Calabrian Age (1.806 million years ago)
    - Ionian Age (781 thousand years ago)
    - Tarantian Age (126 thousand years ago)
  - Holocene Epoch
    - Holocene Age (11.7 thousand years ago)