Div_GeolTimeAug09

Famennian

Givetian

Eifelian

Lochkovian

Pragian

Frasnian

Emsian

Ludfordian

Gorstian

Homerian

Sheinwoodian

Telychian

Aeronian

Rhuddanian

h a n e r o z o i c

a l e o z o i c

Pridoli

Ludlow

Wenlock

Llandovery

Upper

Middle

Lower

Devonian

411.2 ±2.8

416.0 ±2.8

422.9 ±2.5

428.2 ±2.3

Lopingian

Guadalupian

Cisuralian

Upper

Middle

Lower

Upper

Middle

Lower

h a n e r o z o i c

a l e o z o i c

M e s o z o i c

Carboniferous

Permian

Jurassic

riassic

150.8 ±4.0

~ 155.6

161.2 ±4.0

164.7 ±4.0

167.7 ±3.5

171.6 ±3.0

175.6 ±2.0

183.0 ±1.5

189.6 ±1.5

196.5 ±1.0

199.6 ±0.6

203.6 ±1.5

216.5 ±2.0

~ 228.7

237.0 ±2.0

~ 245.9

~ 249.5

251.0 ±0.4

318.1 ±1.3

260.4 ±0.7

253.8 ±0.7

265.8 ±0.7

268.0 ±0.7

270.6 ±0.7

275.6 ±0.7

284.4 ±0.7

294.6 ±0.8

299.0 ±0.8

303.4 ±0.9

307.2 ±1.0

311.7 ±1.1

Tithonian

Kimmeridgian

Oxfordian

Callovian

Bajocian

Bathonian

Aalenian

Toarcian

Pliensbachian

Sinemurian

Hettangian

Rhaetian

Norian

Carnian

Ladinian

Anisian

Olenekian

Induan

Changhsingian

Wuchiapingian

Capitanian

Wordian

Roadian

Kungurian

Artinskian

Sakmarian

Asselian

Gzhelian

Kasimovian

Moscovian

Bashkirian

Serpukhovian

Visean

Tournaisian

Penn-

sylvanian

Missis- sippian

359.2 ±2.5

345.3 ±2.1

328.3 ±1.6

374.5 ±2.6

385.3 ±2.6

391.8 ±2.7

397.5 ±2.7

407.0 ±2.8

443.7 ±1.5

436.0 ±1.9

439.0 ±1.8

418.7 ±2.7

Ediacaran

Cryogenian

Tonian

Stenian

Ectasian

Calymmian

Statherian

Orosirian

Rhyacian

Siderian

Neo-

proterozoic

Neoarchean

Mesoarchean

Paleoarchean

Meso-

proterozoic

Paleo-

proterozoic

Archean

Proterozoic

r e c a m b r i a n

~635

850

1000

1200

1400

1600

1800

2050

2300

2500

2800

3200

3600

4000

~4600

Upper

“Ionian”

Calabrian

Selandian

Tortonian

Serravallian

Langhian

Burdigalian

Aquitanian

Ypresian

Chattian

Rupelian

Priabonian

Danian

Thanetian

Bartonian

Lutetian

Campanian

Santonian

Turonian

Coniacian

Albian

Aptian

Berriasian

Barremian

Valanginian

Hauterivian

Maastrichtian

Cenomanian

Piacenzian

Messinian

Zanclean

Gelasian

h a n e r o z o i c

C e n o z o i c

M e s o z o i c

1.806

0.126

0.781

2.588

5.332

7.246

11.608

13.82

15.97

20.43

70.6 ±0.6

65.5 ±0.3

83.5 ±0.7

85.8 ±0.7

~ 88.6

93.6 ±0.8

40.4 ±0.2

37.2 ±0.1

33.9 ±0.1

28.4 ±0.1

23.03

48.6 ±0.2

55.8 ±0.2

58.7 ±0.2

~ 61.1

99.6 ±0.9

112.0 ±1.0

125.0 ±1.0

130.0 ±1.5

~ 133.9

140.2 ±3.0
145.5 ±4.0

Cretaceous

Paleogene

Neogene

System Period

Eonothem

Eon

Erathem

Era

Stage

Age

Age Ma

GSSP

Epoch

Series

Eonothem

Eon

Erathem

Era

System

Stage

Age

Age Ma

GSSP

Epoch

Series

Period

Eonothem

Eon

Erathem

Era

Age Ma

GSSP

GSSA

System Period

Eonothem

Eon

Era

Stage

Age

Age Ma

GSSP

Epoch

Series

Period

3.600

Oligocene

Eocene

Paleocene

Pliocene

Pleistocene

Upper

Lower

0.0117

INTERNATIONAL STRATIGRAPHIC CHART

International Commission on Stratigraphy

421.3 ±2.6

426.2 ±2.4

Tremadocian

Darriwilian

Hirnantian

Paibian

Upper

Middle

Lower

Series 3

Stage 3

Stage 2

Fortunian

Stage 5

Drumian

Guzhangian

Stage 9

Stage 10

Floian

Dapingian

Sandbian

Katian

Stage 4

Series 2

Terreneuvian

Furongian

Cambrian

Ordovician

~ 503

~ 506.5

~ 510 *

~ 515 *

~ 521 *

~ 528 *

460.9 ±1.6

471.8 ±1.6

488.3 ±1.7

~ 492 *

~ 496 *

~ 499

542.0 ±1.0

455.8 ±1.6

445.6 ±1.5

468.1 ±1.6

478.6 ±1.7

Silurian

Erathem

System

542

359.2 ±2.5

145.5 ±4.0

Quaternary

ICS

Subdivisions of the global geologic record are

formally defined by their lower boundary. Each unit

of the Phanerozoic (~542 Ma to Present) and the

base of Ediacaran are defined by a basal Global

Boundary Stratotype Section and Point (GSSP ),

whereas Precambrian units are formally subdivided

by absolute age (Global Standard Stratigraphic Age,

GSSA). Details of each GSSP are posted on the

ICS website (

www.stratigraphy.org

Numerical ages of the unit boundaries in the

Phanerozoic are subject to revision. Some stages

within the Cambrian will be formally named upon

international agreement on their GSSP limits. Most

sub-Series boundaries (e.g., Middle and Upper

Aptian) are not formally defined.

Colors are according to the Commission for the

Geological Map of the World (

www.cgmw.org

The listed numerical ages are from 'A Geologic

Time Scale 2004', by F.M. Gradstein, J.G. Ogg,

A.G. Smith, et al. (2004; Cambridge University Press)
and “The Concise Geologic Time Scale” by J.G. Ogg,
G. Ogg and F.M. Gradstein (2008).

This chart was drafted by Gabi Ogg. Intra Cambrian unit ages

with * are informal, and awaiting ratified definitions.

Eoarchean

Hadean (informal)

Holocene

Miocene

August 2009