Stephen E. Jones

Projects: The Geological Timescale

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The Geological Timescale
AN OVERVIEW

Era

Sub-Era

Period

Epoch

Start
(mya)

"Year"

 

 

 

Cenozoic

Quaternary or
Pleistogene

Holocene

0.01

31 Dec

Pleistocene

1.64

31 Dec

 

 

Tertiary

Neogene

Pliocene

5.2

31 Dec

Miocene

23.3

30 Dec

 

Paleogene

35.4

29 Dec

Eocene

56.5

27 Dec

Paleocene

65.0

26 Dec

 

 

 

Mesozoic

 

Cretaceous

Gulf

Senonian

88.5

25 Dec

Gallic

131.8

21 Dec

K1

Neocomian

145.6

20 Dec

 

Jurassic

Malm

157.1

19 Dec

Dogger

178.0

17 Dec

Lias

208.0

15 Dec

 

Triassic

Tr3

235.0

13 Dec

Tr2

241.1

12 Dec

Scythian

245.0

12 Dec

 

 

 

 

 

 

 

 

Palaeozoic

Permian

Zechstein

256.1

11 Dec

Rotliegendes

290.0

08 Dec

 

 

 

Carboniferous

 

Pennsylvanian

Gzelian

295.1

08 Dec

Kasimovian

303.0

07 Dec

Moscovian

311.3

07 Dec

Bashkirian

322.8

06 Dec

 

Mississippian

Serpukhovian

332.9

05 Dec

Visean

349.5

04 Dec

Tournaisian

362.5

02 Dec

 

Devonian

Upper

377.4

01 Dec

Middle

386.0

01 Dec

Lower

408.5

30 Nov

 

Silurian

Pridoli

410.7

29 Nov

Ludlow

424.0

28 Nov

Wenlock

430.4

27 Nov

Llandovery

439.0

27 Nov

 

 

Ordovician

Bala

Ashgill

443.1

26 Nov

Caradoc

463.9

24 Nov

Dyfed

Llandeilo

468.6

24 Nov

Llanvirn

476.1

23 Nov

Canadian

Arenig

493.0

22 Nov

Tremadoc

510.0

21 Nov

 

Cambrian

Merioneth

517.2

20 Nov

St David's

536.0

19 Nov

Caerfai

570.0

18 Nov

Precambrian

 

 

 

Proterozoic

 

Sinian

Vendian

Ediacara

590

14 Nov

Varanger

610

13 Nov

Sturtian

825

27 Oct

 

Riphean

Karatau

1100

04 Oct

Yurmatian

1375

12 Sep

Burzyan

1675

19 Aug

Animikean

2225

06 Jul

Huronian

2475

16 Jun

 

Archaean

Randian

2825

19 May

Swazian

3525

24 Mar

Isuan

3875

24 Feb

 

Priscoan

 

Hadean

Early Imbrian

3900

22 Feb

Nectarian

3975

16 Feb

Basin Groups

4150

02 Feb

Cryptic

4560

01 Jan

Sources:
Harland W.B., et al., "A Geologic Time Scale 1989," Cambridge University Press: Cambridge UK, Revised Edition, 1990.
Allaby A. & Allaby M., eds, "A Dictionary of Earth Sciences," [1990], Oxford University Press: Oxford UK, Second Edition, 1999.

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Copyright © 2000-2007, by Stephen E. Jones. All rights reserved. This page and its contents may be used for non-commercial purposes only.
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Created: 17 February, 2000. Updated: 15 January, 2007