International Stratigraphic Chart

Unesco IUGS Strat Chart
This is an HTML version of the IUGS stratigraphic chart. PDF versions of this chart can be found here and here.

HOLOCENE

Ma

+/-

Ma

+/-

Q2

Q

PLEISTOCENE

Q1

PLIOCENE

Gelasian

1.75

0.05

1.81

GSSP

n9

N2

N

Piacenzian

2.58

GSSP

n8

Zanclean

3.4

3.6

GSSP

n7

MIOCENE

Messinian

5.3

0.15

5.33

GSSP

n6

N1

Tortonian

7.3

0.15

7.1

GSSP

n5

Serravallian

11

0.3

11

n4

Langhian

14.3

0.5

13.6

n3

Burdigalian

15.8

0.2

16.4

n2

Aquitanian

20.3

0.4

19.1

n1

OLIGOCENE

Chattian

23.5

1

23.8

GSSP

e9

E3

E

Rupelian

28

1

e8

EOCENE

Priabonian

33.7

0.5

GSSP

e7

E2

Bartonian

37

1/0.5

e6

Lutetian

40

1

e5

Ypresian

46

1/0.5

e4

PALEOCENE

Thanetian

53

1

e3

E1

Selandian

e2

Danian

e1

UPPER/LATE

Maastrichtian

65

0.5

65

0.1

GSSP

k6

K2

K

Campanian

72

0.5

71.3

0.5

k5

Santonian

83

1

83.5

0.5

k4

Coniacian

87

1

85.8

0.5

k3

Turonian

88

1

89

0.5

k2

Cenomanain

92

2

93.5

0.2

k1

LOWER/EARLY

Albain

96

2

98.9

0.6

b6

K1

Aptian

108

3/1

112.2

1.1

b5

Barremian

113

3

121

1.4

b4

Hauterivian

117

5/2

127

1.6

b3

Valaginian

123

6/2

132

1.9

b2

Berriasian

131

4

136.5

2.2

b1

UPPER/LATE

Tithonian

135

5/5

144.2

2.6

j7

J3

J

Kimmeridgian

141

?/5

j6

Oxfordian

146

j5

MIDDLE

Callovian

154

5

j4

J2

Bathonian

160

2

j3

Bajocian

164

2

j2

Aalenian

170

4/3

GSSP

j1

LOWER/EARLY

Toarcian

175

3

GSSP

l4

J1

Pliensbachian

184

3

l3

Sinemurian

191

l2

Hettangian

200

4/7

l1

UPPER/LATE

Rhetian

203

3

t7

T3

T

Norian

t6

Carnian

220

t5

MIDDLE

Ladinian

230

6

t4

T2

Anisian

233

5

t3

LOWER/EARLY

Olenekian

240

5

t2

T1

Induan

250

3

251.1

3.6

t1

LOPINGIAN

Changhsingian

p9

P3

P

Wuchiapigian

250

3

251.1

3.6

p8

GUADALUPIAN

Capitanian

p7

P2

Wordian

p6

Roadian

p5

CISURALIAN

Kungurian

272.2

3.2

p4

P1

Artinskian

p3

Sakmarian

280.3

2.6

p2

Asselian

p1

PENNSYLVANIAN

Gzhelian

295

5

298

GSSP

c7

C2

C

Kazimovian

c6

Moscovian

c5

Bashkirian

c4

MISSISSIPPIAN

Serpukhovian

320

GSSP

c3

C1

Visean

325

5

327

c2

Tournaisian

345

342

3.6

c1

UPPER/LATE

Famennian

355

5

354

4

GSSP

d7

D3

D

Frasnian

370

5

GSSP

d6

MIDDLE

Givetian

375

5

GSSP

d5

D2

Eifelian

380

GSSP

d4

LOWER/EARLY

Emsian

390

5

GSSP

d3

D1

Pragian

400

5

GSSP

d2

Lochkovian

GSSP

d1

PRIDOLI

410

8/5

GSSP

s8

S4

S

LUDLOW

Ludfordian

415

GSSP

s7

S3

Gorstian

GSSP

s6

WENLOCK

Homerian

425

5

GSSP

s5

S2

Sheinwoodian

GSSP

s4

LLANDOVERY

Telychian

430

6

GSSP

s3

S1

Aeronian

GSSP

s2

Rhuddanian

GSSP

s1

UPPER/LATE

435

6/4

440

GSSP

o4

O3

O

MIDDLE

Darriwillian

455

5

<-4 <-3

o3

O2

467.5

3

GSSP

o2

LOWER/EARLY

465

5

<-2 <-1

o1

O1

Tremadocian

UPPER/LATE

500

495

GSSP

e3

E3

E

MIDDLE

500

e2

E2

LOWER/EARLY

520

520

e1

E1

540

5

545

GSSP