International Chronostratigraphic Timescale
The interval definitions in this timescale are derived from the following sources:
- K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication view
- J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view
There are 59 timescales which overlap this one. show
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 126699 collections
| International Chronostratigraphic Timescale | Ten Million Year Bins | Mammal Paleogene Zones | Cretaceous North American Land-Mammal Ages | Obsolete Carboniferous Ages of China | Obsolete Names for ICS Units | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Quaternary | Holocene | Meghalayan | Cenozoic 6 | 0 | |||||||
| Northgrippian | 0.0042 | ||||||||||
| Greenlandian | 0.0082 | ||||||||||
| Pleistocene | Late Pleistocene | 0.0117 | |||||||||
| Chibanian | 0.129 | ||||||||||
| Calabrian | 0.774 | ||||||||||
| Gelasian | 1.8 | ||||||||||
| Neogene | Pliocene | Piacenzian | Tertiary † | 2.58 | |||||||
| Zanclean | 3.6 | ||||||||||
| Miocene | Messinian | 5.333 | |||||||||
| Tortonian | 7.246 | ||||||||||
| Serravallian | Cenozoic 5 | 11.63 | |||||||||
| Langhian | 13.82 | ||||||||||
| Burdigalian | 15.98 | ||||||||||
| Aquitanian | 20.44 | ||||||||||
| Paleogene | Oligocene | Chattian | Cenozoic 4 | MP 30/MP 29/MP 28/MP 27/MP 26 | MP 25 | 23.03 | |||||
| Rupelian | MP 24/MP 23/MP 22/MP 21 | 27.82 | |||||||||
| Eocene | Priabonian | Cenozoic 3 | MP 20/MP 19/MP 18/MP 17B/MP 17A | 33.9 | |||||||
| Bartonian | MP 16 | 37.71 | |||||||||
| Lutetian | Cenozoic 2 | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | ||||||||
| Ypresian | MP 10/MP 8 + 9/MP 7 | 47.8 | |||||||||
| Paleocene | Thanetian | Cenozoic 1 | MP 6 | MP 1 - 5 | 56 | ||||||
| Selandian | 59.2 | ||||||||||
| Danian | 61.6 | ||||||||||
| Cretaceous | Late Cretaceous | Maastrichtian | Cretaceous 8 | Lancian/Edmontonian | 66 | ||||||
| Campanian | Cretaceous 7 | Judithian/Aquilan | 72.1 | ||||||||
| Santonian | Cretaceous 6 | 83.6 | |||||||||
| Coniacian | 86.3 | ||||||||||
| Turonian | 89.8 | ||||||||||
| Cenomanian | Cretaceous 5 | 93.9 | |||||||||
| Early Cretaceous | Albian | Cretaceous 4 | 100.5 | ||||||||
| Aptian | Cretaceous 3 | 113 | |||||||||
| Barremian | Cretaceous 2 | 121.4 | |||||||||
| Hauterivian | 125.77 | ||||||||||
| Valanginian | Cretaceous 1 | 132.6 | |||||||||
| Berriasian | 139.8 | ||||||||||
| Jurassic | Late Jurassic | Tithonian | Jurassic 6 | 145 | |||||||
| Kimmeridgian | Jurassic 5 | 149.2 | |||||||||
| Oxfordian | 154.8 | ||||||||||
| Middle Jurassic | Callovian | 161.5 | |||||||||
| Bathonian | Jurassic 4 | 165.3 | |||||||||
| Bajocian | 168.2 | ||||||||||
| Aalenian | Jurassic 3 | 170.9 | |||||||||
| Early Jurassic | Toarcian | 174.7 | |||||||||
| Pliensbachian | Jurassic 2 | 184.2 | |||||||||
| Sinemurian | Jurassic 1 | 192.9 | |||||||||
| Hettangian | 199.5 | ||||||||||
| Triassic | Late Triassic | Rhaetian | Triassic 4 | 201.4 | |||||||
| Norian | 208.5 | ||||||||||
| Carnian | Triassic 3 | 227 | |||||||||
| Middle Triassic | Ladinian | Triassic 2 | 237 | ||||||||
| Anisian | 242 | ||||||||||
| Early Triassic | Olenekian | Triassic 1 | 247.2 | ||||||||
| Induan | 251.2 | ||||||||||
| Permian | Lopingian | Changhsingian | Permian 4 | 251.902 | |||||||
| Wuchiapingian | Longtanian † | 254.14 | |||||||||
| Guadalupian | Capitanian | 259.51 | |||||||||
| Wordian | 264.28 | ||||||||||
| Roadian | Permian 3 | 266.9 | |||||||||
| Cisuralian | Kungurian | Permian 2 | 273.01 | ||||||||
| Artinskian | 283.5 | ||||||||||
| Sakmarian | 290.1 | ||||||||||
| Asselian | Permian 1 | 293.52 | |||||||||
| Carboniferous | Pennsylvanian | Gzhelian | Carboniferous 5 | Mapingian † | 298.9 | ||||||
| Kasimovian | 303.7 | ||||||||||
| 305.9 | |||||||||||
| Moscovian | Carboniferous 4 | 307 | |||||||||
| Bashkirian | 315.2 | ||||||||||
| Mississippian | Serpukhovian | Carboniferous 3 | 323.2 | ||||||||
| Visean | Carboniferous 2 | 330.9 | |||||||||
| Tournaisian | Carboniferous 1 | 346.7 | |||||||||
| Devonian | Late Devonian | Famennian | Devonian 5 | 358.9 | |||||||
| Frasnian | Devonian 4 | 372.2 | |||||||||
| Middle Devonian | Givetian | Devonian 3 | 382.7 | ||||||||
| Eifelian | 387.7 | ||||||||||
| Early Devonian | Emsian | Devonian 2 | 393.3 | ||||||||
| Pragian | Devonian 1 | 407.6 | |||||||||
| Lochkovian | 410.8 | ||||||||||
| Silurian | Pridoli | Silurian 2 | 419.2 | ||||||||
| Ludlow | Ludfordian | 423 | |||||||||
| Gorstian | 425.6 | ||||||||||
| Wenlock | Homerian | 427.4 | |||||||||
| Sheinwoodian | 430.5 | ||||||||||
| Llandovery | Telychian | Silurian 1 | 433.4 | ||||||||
| Aeronian | 438.5 | ||||||||||
| Rhuddanian | 440.8 | ||||||||||
| Ordovician | Late Ordovician | Hirnantian | Ordovician 5 | 443.8 | |||||||
| Katian | 445.2 | ||||||||||
| Sandbian | Ordovician 4 | 453 | |||||||||
| Middle Ordovician | Darriwilian | Ordovician 3 | 458.4 | ||||||||
| Dapingian | Ordovician 2 | 467.3 | |||||||||
| Early Ordovician | Floian | 470 | |||||||||
| Tremadocian | Ordovician 1 | 477.7 | |||||||||
| Cambrian | Furongian | Stage 10 | Cambrian 5 | 485.4 | |||||||
| Jiangshanian | 489.5 | ||||||||||
| Paibian | 494 | ||||||||||
| Miaolingian | Guzhangian | Cambrian 4 | Series 3 † | 497 | |||||||
| Drumian | 500.5 | ||||||||||
| Wuliuan | Cambrian 3 | Stage 5 † | 504.5 | ||||||||
| Series 2 | Stage 4 | 509 | |||||||||
| Stage 3 | Cambrian 2 | 514 | |||||||||
| Terreneuvian | Stage 2 | 521 | |||||||||
| Fortunian | Cambrian 1 | 529 | |||||||||
| 538.8 | |||||||||||