v 2019/05www.stratigraphy.org
0.01170.1260.7731.802.58
3.6005.3337.246
11.63
13.82
15.97
20.44
23.03
27.82
33.9
37.841.2
47.8
56.059.261.6
66.0
72.1 ±0.2
83.6 ±0.286.3 ±0.5
89.8 ±0.3
93.9
100.5
~ 113.0
~ 125.0
~ 129.4~ 132.9
~ 139.8
~ 145.0
~ 145.0
152.1 ±0.9
157.3 ±1.0
163.5 ±1.0166.1 ±1.2168.3 ±1.3170.3 ±1.4
174.1 ±1.0
182.7 ±0.7
190.8 ±1.0
199.3 ±0.3201.3 ±0.2
~ 208.5
~ 227
254.14 ±0.07
259.1 ±0.5
265.1 ±0.4268.8 ±0.5
272.95 ±0.11
283.5 ±0.6
290.1 ±0.26
303.7 ±0.1307.0 ±0.1
315.2 ±0.2
323.2 ±0.4
330.9 ±0.2
346.7 ±0.4
358.9 ±0.4
298.9 ±0.15293.52 ±0.17
~ 237
~ 242
247.2251.2
251.902 ±0.024
358.9 ±0.4
372.2 ±1.6
382.7 ±1.6
387.7 ±0.8
393.3 ±1.2
407.6 ±2.6410.8 ±2.8
419.2 ±3.2
423.0 ±2.3425.6 ±0.9427.4 ±0.5430.5 ±0.7433.4 ±0.8
438.5 ±1.1440.8 ±1.2443.8 ±1.5445.2 ±1.4
453.0 ±0.7
458.4 ±0.9
467.3 ±1.1470.0 ±1.4
477.7 ±1.4
485.4 ±1.9
541.0 ±1.0
~ 489.5
~ 494~ 497
~ 500.5
~ 504.5
~ 509
~ 514
~ 521
~ 529
541.0 ±1.0
~ 635
1000
1200
1400
1600
1800
2050
2300
2500
2800
3200
3600
4000
~ 4600
~ 720
0.00420.0082
Phan
eroz
oic
Cen
ozoi
cQ
uate
rnar
y Holocene
Pleistocene
Pliocene
Miocene
Oligocene
Eocene
Paleocene
Neo
gene
Pale
ogen
e
Upper
Lower
Cre
tace
ous
Mes
ozoi
c
Tria
ssic
Car
boni
fero
usM
esoz
oic
Perm
ian
Jura
ssic
Upper
Lower
Middle
Upper
Lower
Middle
Lopingian
Guadalupian
Cisuralian
Upper
Lower
Upper
Middle
Middle
Lower
Mis
siss
ippi
anPe
nnsy
lvan
ian
Pale
ozoi
c
MiddleUpper
CalabrianGelasian
PiacenzianZancleanMessinianTortonian
SerravallianLanghian
BurdigalianAquitanianChattian
Rupelian
PriabonianBartonianLutetian
Ypresian
ThanetianSelandian
Danian
Maastrichtian
Campanian
SantonianConiacian
Turonian
Cenomanian
Albian
Aptian
BarremianHauterivianValanginian
Berriasian
TithonianKimmeridgian
OxfordianCallovianBathonianBajocianAalenianToarcian
Pliensbachian
SinemurianHettangianRhaetian
Norian
Carnian
LadinianAnisian
OlenekianInduan
ChanghsingianWuchiapingian
CapitanianWordianRoadian
Kungurian
Artinskian
Sakmarian
Gzhelian
Famennian
Frasnian
Givetian
Eifelian
Emsian
PragianLochkovian
LudfordianGorstian
HomerianSheinwoodian
TelychianAeronian
RhuddanianHirnantian
Katian
Sandbian
Darriwilian
DapingianFloian
Tremadocian
Stage 10
JiangshanianPaibian
GuzhangianDrumianWuliuan
Stage 4
Stage 3
Stage 2
Fortunian
KasimovianMoscovian
Bashkirian
Serpukhovian
Visean
TournaisianTerreneuvian
Series 2
Miaolingian
Furongian
Cam
bria
n
Upper
Lower
Middle
Llandovery
Wenlock
Ludlow
Pridoli
Upper
Middle
Lower
Silu
rian
Dev
onia
nO
rdov
icia
nPa
leoz
oic
Phan
eroz
oic
Phan
eroz
oic
Asselian
Hadean
Arch
ean
Pre
cam
bria
n Prot
eroz
oic
Neo-proterozoic
Meso-proterozoic
Paleo-proterozoic
Neo-archean
Meso-archean
Paleo-archean
Eo-archean
EdiacaranCryogenian
Tonian
Stenian
Ectasian
Calymmian
Statherian
Orosirian
Rhyacian
Siderian
Greenlandian
MeghalayanNorthgrippian
U/L
L/EM
presentSeries / Epoch Stage / Age
numericalage (Ma) Eo
noth
em /
Eon
Erat
hem
/ Er
aSy
stem
/ Pe
riod
Series / Epoch Stage / Agenumericalage (Ma) Eo
noth
em /
Eon
Erat
hem
/ Er
aSy
stem
/ Pe
riod
Series / Epoch Stage / Agenumericalage (Ma)
numericalage (Ma)Eo
noth
em /
Eon
Erat
hem
/ Er
aSy
stem
/ Pe
riod
GSS
P
GSS
P
GSS
P
GSS
P
GSS
A
INTERNATIONAL CHRONOSTRATIGRAPHIC CHARTInternational Commission on Stratigraphy
Colouring follows the Commission for the Geological Map of the World (www.ccgm.org)
Chart drafted by K.M. Cohen, D.A.T. Harper, P.L. Gibbard, J.-X. Fan(c) International Commission on Stratigraphy, May 2019
To cite: Cohen, K.M., Finney, S.C., Gibbard, P.L. & Fan, J.-X. (2013; updated) The ICS International Chronostratigraphic Chart. Episodes 36: 199-204.
URL: http://www.stratigraphy.org/ICSchart/ChronostratChart2019-05.pdf
Units of all ranks are in the process of being defined by Global Boundary Stratotype Section and Points (GSSP) for their lower boundaries, including those of the Archean and Proterozoic, long defined by Global Standard Stratigraphic Ages (GSSA). Italic fonts indicate informal units and placeholders for unnamed units. Versioned charts and detailed information on ratified GSSPs are available at the website http://www.stratigraphy.org. The URL to this chart is found below.
Numerical ages are subject to revision and do not define units in the Phanerozoic and the Ediacaran; only GSSPs do. For boundaries in the Phanerozoic without ratified GSSPs or without constrained numerical ages, an approximate numerical age (~) is provided.
Ratified Subseries/Subepochs are abbreviated as U/L (Upper/Late), M (Middle) and L/E (Lower/Early). Numerical ages for all systems except Quaternary, upper Paleogene, Cretaceous, Triassic, Permian and Precambrian are taken from ‘A Geologic Time Scale 2012’ by Gradstein et al. (2012), those for the Quaternary, upper Paleogene, Cretaceous, Triassic, Permian and Precambrian were provided by the relevant ICS subcommissions.
Eono
them
/ Eo
nEr
athe
m /
Era
Syste
m /
Perio
d