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
- F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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 126764 collections
International Chronostratigraphic Timescale | Obsolete Precambrian Ages | Mesozoic Subages | Obsolete Carboniferous Ages of China | |||||||
---|---|---|---|---|---|---|---|---|---|---|
Phanerozoic | Mesozoic | Cretaceous | Late Cretaceous | Maastrichtian | Late Maastrichtian/Early Maastrichtian | 66 | ||||
Campanian | Late Campanian/Middle Campanian/Early Campanian | 72.1 | ||||||||
Santonian | Late Santonian/Middle Santonian/Early Santonian | 83.6 | ||||||||
Coniacian | Late Coniacian/Middle Coniacian/Early Coniacian | 86.3 | ||||||||
Turonian | Late Turonian/Middle Turonian/Early Turonian | 89.8 | ||||||||
Cenomanian | Late Cenomanian/Middle Cenomanian/Early Cenomanian | 93.9 | ||||||||
Early Cretaceous | Albian | Late Albian | 100.5 | |||||||
Middle Albian | 106.2 * | |||||||||
Early Albian | 109.9 * | |||||||||
Aptian | Late Aptian | 113 | ||||||||
Early Aptian | 119.5 * | |||||||||
Barremian | Late Barremian/Early Barremian | 121.4 | ||||||||
Hauterivian | Late Hauterivian/Early Hauterivian | 125.77 | ||||||||
Valanginian | Late Valanginian/Early Valanginian | 132.6 | ||||||||
Berriasian | Late Berriasian | 139.8 | ||||||||
Middle Berriasian | 140.6 * | |||||||||
Early Berriasian | 142.7 * | |||||||||
Jurassic | Late Jurassic | Tithonian | Late Tithonian | Middle Tithonian | 145 | |||||
Early Tithonian | 146.3 * | |||||||||
Kimmeridgian | Late Kimmeridgian | 149.2 | ||||||||
Early Kimmeridgian | 152.2 * | |||||||||
Oxfordian | Late Oxfordian | Middle Oxfordian/Early Oxfordian | 154.8 | |||||||
157.9 * | ||||||||||
Middle Jurassic | Callovian | Late Callovian/Middle Callovian/Early Callovian | 161.5 | |||||||
Bathonian | Late Bathonian/Middle Bathonian/Early Bathonian | 165.3 | ||||||||
Bajocian | Late Bajocian | 168.2 | ||||||||
Early Bajocian | 168.6 * | |||||||||
Aalenian | Late Aalenian/Middle Aalenian/Early Aalenian | 170.9 | ||||||||
Early Jurassic | Toarcian | Late Toarcian | 174.7 | |||||||
Middle Toarcian | 180.4 * | |||||||||
Early Toarcian | 182.9 * | |||||||||
Pliensbachian | Late Pliensbachian/Early Pliensbachian | 184.2 | ||||||||
Sinemurian | Late Sinemurian/Early Sinemurian | 192.9 | ||||||||
Hettangian | Late Hettangian/Middle Hettangian/Early Hettangian | 199.5 | ||||||||
Triassic | Late Triassic | Rhaetian | 201.4 | |||||||
Norian | Sevatian | 208.5 | ||||||||
Alaunian | 213.2 * | |||||||||
Lacian | 216.7 * | |||||||||
Carnian | Tuvalian | 227 | ||||||||
Julian | 233.4 * | |||||||||
Middle Triassic | Ladinian | Longobardian | 237 | |||||||
Fassanian | 239.7 * | |||||||||
Anisian | Illyrian | 242 | ||||||||
Pelsonian | 243.8 * | |||||||||
Bithynian | 244.7 * | |||||||||
Aegean | 245.5 * | |||||||||
Early Triassic | Olenekian | Spathian | 247.2 | |||||||
Smithian | 248.9 * | |||||||||
Induan | Dienerian | 251.2 | ||||||||
Griesbachian | 251.4 * | |||||||||
Paleozoic | 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 | Mapingian † | 298.9 | ||||||
Kasimovian | 303.7 | |||||||||
305.9 | ||||||||||
Moscovian | 307 | |||||||||
Bashkirian | 315.2 | |||||||||
Mississippian | Serpukhovian | 323.2 | ||||||||
Visean | 330.9 | |||||||||
Tournaisian | 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 | 497 | ||||||||
Drumian | 500.5 | |||||||||
Wuliuan | 504.5 | |||||||||
Series 2 | Stage 4 | 509 | ||||||||
Stage 3 | 514 | |||||||||
Terreneuvian | Stage 2 | 521 | ||||||||
Fortunian | 529 | |||||||||
Proterozoic | Neoproterozoic | Ediacaran | Vendian † | Poundian † | 538.8 | |||||
Wonokan † | 571.7 * | |||||||||
635 |