Geologic Time Scale

[Composite from Young, G.C, and Laurie, J.R., 1996*, and & GSA Today, February 2001]

 

ERA

(Duration)

PERIOD

EPOCH

BEGINNING DATE

(Duration)

[In millions of years]

Cenozoic

(65)

Quaternary

Holocene

0.01 (0.01)

Pleistocene

2.4 (2.4)

Tertiary

Pliocene

5 (3)

Miocene

24 (19)

Oligocene

37 (13)

Eocene

58 (21)

Paleocene

65 (7)

Mesozoic

(186)

Cretaceous

146 (81)

Jurassic

206 (60)

Triassic

251 (45)

Paleozoic

(291)

Permian

298 (47)

Pennsylvanian

325 (27)

Mississippian

354 (29)

Devonian

410 (56)

Silurian

434 (24)

Ordovician

490 (56)

Cambrian

542 (52)

PreCambrian

(4058)

Proterozoic Eon

Ediacaran Period

620 (78)

N/A

2500 (1880)

Archean Eon

3800 (1300)

Hadean Eon

4600 (800)

 

* Young, G.C., and Laurie, J.R., 1996, An Australian Phanerozoic timescale: Oxford University Press, England, 292 p.