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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 127243 collections
International Chronostratigraphic Timescale | Carboniferous Subepochs | Devonian Subages | Mammal Paleogene Zones | Ordovician of Britain | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
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 | 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 | MP 20/MP 19/MP 18/MP 17B/MP 17A | 33.9 | ||||||||
Bartonian | MP 16 | 37.71 | |||||||||
Lutetian | MP 15/MP 14/MP 13/MP 12/MP 11 | 41.2 | |||||||||
Ypresian | MP 10/MP 8 + 9/MP 7 | 47.8 | |||||||||
Paleocene | Thanetian | MP 6 | MP 1 - 5 | 56 | |||||||
Selandian | 59.2 | ||||||||||
Danian | 61.6 | ||||||||||
Cretaceous | Late Cretaceous | Maastrichtian | 66 | ||||||||
Campanian | 72.1 | ||||||||||
Santonian | 83.6 | ||||||||||
Coniacian | 86.3 | ||||||||||
Turonian | 89.8 | ||||||||||
Cenomanian | 93.9 | ||||||||||
Early Cretaceous | Albian | 100.5 | |||||||||
Aptian | 113 | ||||||||||
Barremian | 121.4 | ||||||||||
Hauterivian | 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 | 247.2 | |||||||||
Induan | 251.2 | ||||||||||
Permian | Lopingian | Changhsingian | 251.902 | ||||||||
Wuchiapingian | 254.14 | ||||||||||
Guadalupian | Capitanian | 259.51 | |||||||||
Wordian | 264.28 | ||||||||||
Roadian | 266.9 | ||||||||||
Cisuralian | Kungurian | 273.01 | |||||||||
Artinskian | 283.5 | ||||||||||
Sakmarian | 290.1 | ||||||||||
Asselian | 293.52 | ||||||||||
Carboniferous | Pennsylvanian | Gzhelian | Late Pennsylvanian | 298.9 | |||||||
Kasimovian | 303.7 | ||||||||||
Moscovian | Middle Pennsylvanian | 307 | |||||||||
Bashkirian | Early Pennsylvanian | 315.2 | |||||||||
Mississippian | Serpukhovian | Late Mississippian | 323.2 | ||||||||
Visean | Middle Mississippian | 330.9 | |||||||||
Tournaisian | Early Mississippian | 346.7 | |||||||||
Devonian | Late Devonian | Famennian | Late Famennian | 358.9 | |||||||
Middle Famennian | 365.3 * | ||||||||||
Early Famennian | 368.5 * | ||||||||||
Frasnian | Late Frasnian | 372.2 | |||||||||
Middle Frasnian | 375.4 * | ||||||||||
Early Frasnian | 379.3 * | ||||||||||
Middle Devonian | Givetian | Late Givetian | 382.7 | ||||||||
Middle Givetian | 383.7 * | ||||||||||
Early Givetian | 385.9 * | ||||||||||
Eifelian | Late Eifelian | 387.7 | |||||||||
Early Eifelian | 390.3 * | ||||||||||
Early Devonian | Emsian | Late Emsian | 393.3 | ||||||||
Early Emsian | 398.3 * | ||||||||||
Pragian | Pragian | 407.6 | |||||||||
Lochkovian | Late Lochkovian | 410.8 | |||||||||
Middle Lochkovian | 412.8 * | ||||||||||
Early Lochkovian | 415.6 * | ||||||||||
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 | Ashgill | Hirnantian | 443.8 | ||||||
Katian | Rawtheyan | 445.2 | |||||||||
Cautleyan | 448.9 * | ||||||||||
Pusgillian | 449.3 * | ||||||||||
Caradoc | Streffordian | Onnian † | 449.6 * | ||||||||
Cheneyan | 451.5 * | ||||||||||
Burrellian | 452.7 * | ||||||||||
Sandbian | 453 | ||||||||||
Actonian † | 453.2 * | ||||||||||
Marshbrookian † | Woolstonian † | 454.2 * | |||||||||
Longvillian † | 455.2 * | ||||||||||
Aurelucian | 456.8 * | ||||||||||
Soudleyan †/Harnagian/Costonian | 457.4 * | ||||||||||
Middle Ordovician | Darriwilian | Llanvirn | Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn | 458.4 | |||||||
Abereiddian/Early Llanvirn | 461.3 * | ||||||||||
Dapingian | 467.3 | ||||||||||
Arenig | Fennian | 468.4 * | |||||||||
Early Ordovician | Floian | 470 | |||||||||
Whitlandian | 471.1 * | ||||||||||
Moridunian | 474.3 * | ||||||||||
Tremadocian | Tremadoc | Migneintian | 477.7 | ||||||||
Cressagian | 480.8 * | ||||||||||
485 * | |||||||||||
Cambrian | Furongian | Stage 10 | 485.4 | ||||||||
Jiangshanian | 489.5 | ||||||||||
Paibian | 494 | ||||||||||
Miaolingian | Guzhangian | 497 | |||||||||
Drumian | 500.5 | ||||||||||
Wuliuan | 504.5 | ||||||||||
Series 2 | Stage 4 | 509 | |||||||||
Stage 3 | 514 | ||||||||||
Terreneuvian | Stage 2 | 521 | |||||||||
Fortunian | 529 | ||||||||||
538.8 |