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. J. Prevosti, C. O. Romano, A. M. Forasiepi, S. Hemming, R. Bonini, A. M. Candela, E. Cerdeño, M. C. Madozzo Jaén, P. E. Ortiz, F. Pujos, L. Rasia, G. I. Schmidt, M. Taglioretti, R. D. E. MacPhee, and U. F. J. Pardiñas. 2021. New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America. Scientific Reports 2021(11):9830 view
- J. J. Flynn and C. C. Swisher, III. 1995. Cenozoic South American Land Mammal Ages: correlation to global geochronology. Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication 54:317-333 view
- Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 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 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 125932 collections
| International Chronostratigraphic Timescale | South American Land Mammal Ages | Neogene Mammal Ages of China | Carboniferous Subepochs | Obsolete Names for ICS Units | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Quaternary | Pleistocene | Late Pleistocene | Lujanian | Nihewanian | 0.0117 | |||||
| Chibanian | 0.129 | |||||||||
| Ensenadan | 0.3 * | |||||||||
| Calabrian | 0.774 | |||||||||
| Sanandresian | Uquian † | 1.7 * | ||||||||
| Gelasian | 1.8 | |||||||||
| Neogene | Pliocene | Piacenzian | Vorohuean | Yushean | Tertiary † | 2.58 | ||||
| Chapadmalalan | 2.9 * | |||||||||
| Zanclean | 3.6 | |||||||||
| Montehermosan | 3.7 * | |||||||||
| Huayquerian | Baodean | 4.9 * | ||||||||
| Miocene | Messinian | 5.333 | ||||||||
| Tortonian | 7.246 | |||||||||
| Chasicoan | 7.9 * | |||||||||
| Mayoan | 9.9 * | |||||||||
| Laventan | 10.9 * | |||||||||
| Tunggurian | 11.1 | |||||||||
| Serravallian | 11.63 | |||||||||
| Colloncuran | 13.7 * | |||||||||
| Langhian | Shanwangian | 13.82 | ||||||||
| Friasian | 15.4 * | |||||||||
| Burdigalian | 15.98 | |||||||||
| Santacrucian | 16.2 * | |||||||||
| Xiejiaan | 16.9 | |||||||||
| Colhuehuapian | 17.4 * | |||||||||
| Aquitanian | 20.44 | |||||||||
| Deseadan | 20.9 * | |||||||||
| Paleogene | Oligocene | Chattian | 23.03 | |||||||
| Rupelian | 27.82 | |||||||||
| Tinguirirican | 28.9 * | |||||||||
| Eocene | Priabonian | 33.9 | ||||||||
| Divisaderan | 35.9 * | |||||||||
| Bartonian | 37.71 | |||||||||
| Lutetian | 41.2 | |||||||||
| Mustersan | 41.9 * | |||||||||
| Ypresian | 47.8 | |||||||||
| Casamayoran | 47.9 * | |||||||||
| Paleocene | Thanetian | Riochican | 56 | |||||||
| Itaboraian | 56.9 * | |||||||||
| Peligran | 58.9 * | |||||||||
| Selandian | 59.2 | |||||||||
| Danian | 61.6 | |||||||||
| Tiupampan | 62.4 * | |||||||||
| 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 | Longtanian † | 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 | 358.9 | |||||||
| Frasnian | 372.2 | |||||||||
| Middle Devonian | Givetian | 382.7 | ||||||||
| Eifelian | 387.7 | |||||||||
| Early Devonian | Emsian | 393.3 | ||||||||
| Pragian | 407.6 | |||||||||
| Lochkovian | 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 | 443.8 | |||||||
| Katian | 445.2 | |||||||||
| Sandbian | 453 | |||||||||
| Middle Ordovician | Darriwilian | 458.4 | ||||||||
| Dapingian | 467.3 | |||||||||
| Early Ordovician | Floian | 470 | ||||||||
| Tremadocian | 477.7 | |||||||||
| Cambrian | Furongian | Stage 10 | 485.4 | |||||||
| Jiangshanian | 489.5 | |||||||||
| Paibian | 494 | |||||||||
| Miaolingian | Guzhangian | Series 3 † | 497 | |||||||
| Drumian | 500.5 | |||||||||
| Wuliuan | Stage 5 † | 504.5 | ||||||||
| 509 | ||||||||||