Time Scale

Phanerozoic
(544 ma to present)

Quaternary
(1.8 ma to today)

• Holocene
  (11000 years to today)
• Pleistocene
  (1.8 ma to 11000 yrs)

Tertiary (65 to 1.8 ma)

• Pliocene (5 to 1.8 ma)
• Miocene (23 to 5 ma)
• Oligocene (38 to 23 ma)
• Eocene (54 to 38 ma)
• Paleocene (65 to 54 ma)

Cretaceous (146 to 65 ma)

Jurassic (208 to 146 ma)

Triassic (245 to 208 ma)

Permian (286 to 245 ma)

Carboniferous
(360 to 286 ma)

• Upper Carboniferous
  (325 to 286 ma)
• Lower Carboniferous
  (360 to 325 ma)

Devonian (410 to 360 ma)

Silurian (440 to 410 mya)

Ordovician (505 to 440 ma)

Cambrian (544 to 505 ma)

• Tommotian
  (530 to 527 ma)

Precambrian
(4500 to 544 ma)

Neoproterozoic
(900 to 544 ma)

• Vendian
  (650 to 544 ma)

Mesoproterozoic
(1600 to 900 ma)

Paleoproterozoic
(2500 to 1600 ma)