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INTERNATIONAL STRATIGRAPHIC CHART
Langhian
Burdigalian
Aquitanian
Oligocene
Chattian
Rupelian
Priabonian
Eocene
Bartonian
Lutetian
Ypresian
Thanetian
Paleocene
Selandian
Danian
Maastrichtian
Campanian
Mesozoic
Cretaceous
Upper
Santonian
Coniacian
Turonian
Cenomanian
Albian
Aptian
Lower
Barremian
Hauterivian
Valanginian
Berriasian
3.600
5.332
7.246
11.608
13.82
15.97
20.43
23.03
28.4 ±0.1
33.9 ±0.1
37.2 ±0.1
40.4 ±0.2
48.6 ±0.2
55.8 ±0.2
65.5 ±0.3
70.6 ±0.6
83.5 ±0.7
85.8 ±0.7
~ 88.6
93.6 ±0.8
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
Bajocian
Aalenian
Toarcian
Lower
Pliensbachian
Sinemurian
Hettangian
Rhaetian
Upper
Norian
Carnian
Middle
Lower
Lopingian
Ladinian
Anisian
Olenekian
Induan
Changhsingian
Wuchiapingian
Capitanian
Guadalupian
Wordian
Roadian
Kungurian
Cisuralian
Artinskian
Sakmarian
Asselian
Upper
Gzhelian
Kasimovian
Middle
Moscovian
Lower
Bashkirian
Upper Serpukhovian
Middle
Lower
Visean
164.7 ±4.0
167.7 ±3.5
Middle
189.6 ±1.5
203.6 ±1.5
216.5 ±2.0
~ 228.7
237.0 ±2.0
~ 245.9
~ 249.5
251.0 ±0.4
253.8 ±0.7
260.4 ±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
318.1 ±1.3
328.3 ±1.6
345.3 ±2.1
Tournaisian 359.2 ±2.5
Eifelian
Pragian
Pridoli
183.0 ±1.5
199.6 ±0.6
Givetian
Lochkovian
175.6 ±2.0
196.5 ±1.0
Frasnian
Emsian
Lower
171.6 ±3.0
Ludlow
Wenlock
Ludfordian
Gorstian
Homerian
Sheinwoodian
Telychian
Llandovery
Aeronian
Rhuddanian
Hirnantian
Upper
Katian
Sandbian
Middle
Darriwilian
Dapingian
Floian
Neoproterozoic
385.3 ±2.6
397.5 ±2.7
407.0 ±2.8
411.2 ±2.8
416.0 ±2.8
418.7 ±2.7
421.3 ±2.6
422.9 ±2.5
426.2 ±2.4
428.2 ±2.3
436.0 ±1.9
439.0 ±1.8
443.7 ±1.5
Cryogenian
Tonian
Stenian
Mesoproterozoic
Ectasian
Calymmian
Statherian
Paleoproterozoic
Orosirian
Rhyacian
Siderian
471.8 ±1.6
GSSP
GSSA
~635
850
1000
1200
1400
1600
1800
2050
2300
2500
2800
Mesoarchean
3200
Paleoarchean
3600
Eoarchean
4000
460.9 ±1.6
468.1 ±1.6
542
Neoarchean
445.6 ±1.5
455.8 ±1.6
Age
Ma
System
Period
Ediacaran
374.5 ±2.6
391.8 ±2.7
Erathem
Era
Eonothem
Eon
GSSP
Age
Ma
Stage
Age
Series
Epoch
Eonothem
Eon
Erathem
Era
System
Period
GSSP
Age
Ma
161.2 ±4.0
Devonian
Middle
58.7 ±0.2
~ 61.1
Stage
Age
Series
Epoch
Eonothem
Eon
Erathem
Era
System
Period
GSSP
2.588
Bathonian
~ 155.6
Upper
359.2 ±2.5
Precambrian
Archean
Proterozoic
Miocene
Serravallian
1.806
150.8 ±4.0
Famennian
Hadean (informal)
~4600
Subdivisions of the global geologic record are
formally defined by their lower boundary. Each unit
488.3 ±1.7
of the Phanerozoic (~542 Ma to Present) and the
Stage 10
base of Ediacaran are defined by a basal Global
~ 492 *
Boundary Stratotype Section and Point (GSSP
),
Stage 9
Furongian
~ 496 *
whereas Precambrian units are formally subdivided
Paibian
by absolute age (Global Standard Stratigraphic Age,
~ 499
GSSA). Details of each GSSP are posted on the
Guzhangian
ICS website (www.stratigraphy.org).
~ 503
Numerical ages of the unit boundaries in the
Series 3
Drumian
~ 506.5
Phanerozoic are subject to revision. Some stages
Stage 5
within the Cambrian will be formally named upon
~ 510 *
international agreement on their GSSP limits. Most
Stage 4
sub-Series boundaries (e.g., Middle and Upper
~ 515 *
Series 2
Aptian) are not formally defined.
Stage 3
~ 521 *
Colors are according to the Commission for the
Stage 2
Geological
Map of the World (www.cgmw.org).
~ 528 *
Terreneuvian
The listed numerical ages are from 'A Geologic
Fortunian 542.0 ±1.0
Time Scale 2004', by F.M. Gradstein, J.G. Ogg,
This chart was drafted by Gabi Ogg. Intra Cambrian unit ages A.G. Smith, et al. (2004; Cambridge University Press)
with * are informal, and awaiting ratified definitions.
and “The Concise Geologic Time Scale” by J.G. Ogg,
G. Ogg and F.M. Gradstein (2008).
Copyright © 2009 International Commission on Stratigraphy
Lower
Tremadocian
478.6 ±1.7
Cambrian
Tortonian
Callovian
145.5 ±4.0
Phanerozoic
Paleo zoic
Ordovician
Silurian
Messinian
0.781
Triassic
Zanclean
Kimmeridgian
Oxfordian
Pennsylvanian
Piacenzian
0.126
Mississippian
Gelasian
Pliocene
Phanerozoic
Cenozoic
Paleogene
Neogene
Calabrian
Upper
Meso zoic
Jurassic
Pleistocene
“Ionian”
0.0117
Paleo zoic
Carboniferous
Permian
Upper
Tithonian
Phanerozoic
Quaternary
Holocene
Age
Ma
International Commission on Stratigraphy
Stage
Age
Series
Epoch
Eonothem
Eon
Erathem
Era
System
Period
ICS
August 2009
