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
- 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
- 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, 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
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 128281 collections
| International Chronostratigraphic Timescale | Ten Million Year Bins | Mesozoic Subages | |||||
|---|---|---|---|---|---|---|---|
| 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 | 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 | 23.03 | |||
| Rupelian | 27.82 | ||||||
| Eocene | Priabonian | Cenozoic 3 | 33.9 | ||||
| Bartonian | 37.71 | ||||||
| Lutetian | Cenozoic 2 | 41.2 | |||||
| Ypresian | 47.8 | ||||||
| Paleocene | Thanetian | Cenozoic 1 | 56 | ||||
| Selandian | 59.2 | ||||||
| Danian | 61.6 | ||||||
| Cretaceous | Late Cretaceous | Maastrichtian | Cretaceous 8 | Late Maastrichtian/Early Maastrichtian | 66 | ||
| Campanian | Cretaceous 7 | Late Campanian/Middle Campanian/Early Campanian | 72.1 | ||||
| Santonian | Cretaceous 6 | 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 | Cretaceous 5 | Late Cenomanian/Middle Cenomanian/Early Cenomanian | 93.9 | ||||
| Early Cretaceous | Albian | Cretaceous 4 | Late Albian | 100.5 | |||
| Middle Albian | 106.2 * | ||||||
| Early Albian | 109.9 * | ||||||
| Aptian | Cretaceous 3 | Late Aptian | 113 | ||||
| Early Aptian | 119.5 * | ||||||
| Barremian | Cretaceous 2 | Late Barremian/Early Barremian | 121.4 | ||||
| Hauterivian | Late Hauterivian/Early Hauterivian | 125.77 | |||||
| Valanginian | Cretaceous 1 | Late Valanginian/Early Valanginian | 132.6 | ||||
| Berriasian | Late Berriasian | 139.8 | |||||
| Middle Berriasian | 140.6 * | ||||||
| Early Berriasian | 142.7 * | ||||||
| 145 | |||||||