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
- 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
- A. G. Sennikov and V. K. Golubev. 2006. Vyazniki Biotic Assemblage of the Terminal Permian. Paleontological Journal 40(suppl. 4):S475-S481 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
There are 59 timescales which overlap this one. show
Interval boundaries marked with * have been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.
Interval names marked with † are no longer in current use.
This timescale is used in the definition of 126700 collections
| International Chronostratigraphic Timescale | Cretaceous Subepochs | Permo-Triassic Subages of Eastern Europe | Devonian of France | Cambrian of West Avalonia | Ordovician of Ibero-Bohemia | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Quaternary | Holocene | Meghalayan | 0 | ||||||||
| Northgrippian | 0.0042 | ||||||||||
| Greenlandian | 0.0082 | ||||||||||
| Pleistocene | Late Pleistocene | 0.0117 | |||||||||
| Chibanian | 0.129 | ||||||||||
| Calabrian | 0.774 | ||||||||||
| Gelasian | 1.8 | ||||||||||
| Neogene | Pliocene | Piacenzian | 2.58 | ||||||||
| Zanclean | 3.6 | ||||||||||
| Miocene | Messinian | 5.333 | |||||||||
| Tortonian | 7.246 | ||||||||||
| Serravallian | 11.63 | ||||||||||
| Langhian | 13.82 | ||||||||||
| Burdigalian | 15.98 | ||||||||||
| Aquitanian | 20.44 | ||||||||||
| Paleogene | Oligocene | Chattian | 23.03 | ||||||||
| Rupelian | 27.82 | ||||||||||
| Eocene | Priabonian | 33.9 | |||||||||
| Bartonian | 37.71 | ||||||||||
| Lutetian | 41.2 | ||||||||||
| Ypresian | 47.8 | ||||||||||
| Paleocene | Thanetian | 56 | |||||||||
| Selandian | 59.2 | ||||||||||
| Danian | 61.6 | ||||||||||
| Cretaceous | Late Cretaceous | Maastrichtian | Senonian | 66 | |||||||
| Campanian | 72.1 | ||||||||||
| Santonian | 83.6 | ||||||||||
| Coniacian | 86.3 | ||||||||||
| Turonian | 89.8 | ||||||||||
| Cenomanian | 93.9 | ||||||||||
| Early Cretaceous | Albian | Gallic | 100.5 | ||||||||
| Aptian | 113 | ||||||||||
| Barremian | 121.4 | ||||||||||
| Hauterivian | Neocomian | 125.77 | |||||||||
| Valanginian | 132.6 | ||||||||||
| Berriasian | 139.8 | ||||||||||
| Jurassic | Late Jurassic | Tithonian | 145 | ||||||||
| Kimmeridgian | 149.2 | ||||||||||
| Oxfordian | 154.8 | ||||||||||
| Middle Jurassic | Callovian | 161.5 | |||||||||
| Bathonian | 165.3 | ||||||||||
| Bajocian | 168.2 | ||||||||||
| Aalenian | 170.9 | ||||||||||
| Early Jurassic | Toarcian | 174.7 | |||||||||
| Pliensbachian | 184.2 | ||||||||||
| Sinemurian | 192.9 | ||||||||||
| Hettangian | 199.5 | ||||||||||
| Triassic | Late Triassic | Rhaetian | 201.4 | ||||||||
| Norian | 208.5 | ||||||||||
| Carnian | 227 | ||||||||||
| Middle Triassic | Ladinian | 237 | |||||||||
| Anisian | 242 | ||||||||||
| Early Triassic | Olenekian | Vokhmian | 247.2 | ||||||||
| Induan | 251.2 | ||||||||||
| Permian | Lopingian | Changhsingian | 251.902 | ||||||||
| Wuchiapingian | Late Vyatkian/Early Vyatkian | 254.14 | |||||||||
| Guadalupian | Capitanian | Late Severodvinian/Early Severodvinian | 259.51 | ||||||||
| Wordian | Late Urzhumian/Early Urzhumian | 264.28 | |||||||||
| Roadian | Late Kazanian/Early Kazanian | 266.9 | |||||||||
| Cisuralian | Kungurian | 273.01 | |||||||||
| Artinskian | 283.5 | ||||||||||
| Sakmarian | 290.1 | ||||||||||
| Asselian | 293.52 | ||||||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | ||||||||
| Kasimovian | 303.7 | ||||||||||
| Moscovian | 307 | ||||||||||
| Bashkirian | 315.2 | ||||||||||
| Mississippian | Serpukhovian | 323.2 | |||||||||
| Visean | 330.9 | ||||||||||
| Tournaisian | 346.7 | ||||||||||
| Devonian | Late Devonian | Famennian | Famennian | 358.9 | |||||||
| Frasnian | Frasnian | 372.2 | |||||||||
| Middle Devonian | Givetian | Givetian | 382.7 | ||||||||
| Eifelian | Couvinien | 387.7 | |||||||||
| Early Devonian | Emsian | 393.3 | |||||||||
| Pragian | 407.6 | ||||||||||
| Coblencien | 408.2 * | ||||||||||
| Lochkovian | Gedinnine | 410.8 | |||||||||
| Silurian | Pridoli | 419.2 | |||||||||
| Ludlow | Ludfordian | 423 | |||||||||
| Gorstian | 425.6 | ||||||||||
| Wenlock | Homerian | 427.4 | |||||||||
| Sheinwoodian | 430.5 | ||||||||||
| Llandovery | Telychian | 433.4 | |||||||||
| Aeronian | 438.5 | ||||||||||
| Rhuddanian | 440.8 | ||||||||||
| Ordovician | Late Ordovician | Hirnantian | Kosovian | 443.8 | |||||||
| Katian | Kralodvorian | Bohdalec † | 445.2 | ||||||||
| Berounian | 449.7 * | ||||||||||
| Sandbian | 453 | ||||||||||
| Zahorany †/Vinice | Letna † | 456.2 * | |||||||||
| Liben † | 458 * | ||||||||||
| Middle Ordovician | Darriwilian | 458.4 | |||||||||
| Dobrotivian | 458.5 * | ||||||||||
| Oretanian | 459.7 * | ||||||||||
| Sarka † | 461.7 * | ||||||||||
| Dapingian | Klabava † | 467.3 | |||||||||
| Arenigian | 468 | ||||||||||
| Early Ordovician | Floian | 470 | |||||||||
| Tremadocian | Tremadocian | 477.7 | |||||||||
| Cambrian | Furongian | Stage 10 | 485.4 | ||||||||
| Jiangshanian | 489.5 | ||||||||||
| Paibian | 494 | ||||||||||
| Miaolingian | Guzhangian | 497 | |||||||||
| Arcadian | 498.4 | ||||||||||
| Drumian | 500.5 | ||||||||||
| Wuliuan | 504.5 | ||||||||||
| Series 2 | Stage 4 | Branchian | 509 | ||||||||
| Stage 3 | 514 | ||||||||||
| Placentian | 517.1 | ||||||||||
| Terreneuvian | Stage 2 | 521 | |||||||||
| Fortunian | 529 | ||||||||||
| 538.8 | |||||||||||