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
- 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
- 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
- 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
- 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 126699 collections
| International Chronostratigraphic Timescale | Mesozoic Subages | Ten Million Year Bins | Ammonite Chrons of Northwest Europe | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jurassic | Late Jurassic | Tithonian | Late Tithonian | Middle Tithonian | Jurassic 6 | 145 | ||||||
| Early Tithonian | 146.3 * | |||||||||||
| Kimmeridgian | Late Kimmeridgian | Jurassic 5 | 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 | Jurassic 4 | 165.3 | |||||||||
| Bajocian | Late Bajocian | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | |||||||||
| Humphresianum | 168.4 | |||||||||||
| Early Bajocian | 168.6 * | |||||||||||
| Aalenian | Late Aalenian/Middle Aalenian/Early Aalenian | Jurassic 3 | Concavum/Murchisonae/Opalinum | 170.9 | ||||||||
| Early Jurassic | Toarcian | Late Toarcian | Levesquei/Variabilis/Bifrons | Thouarsense | 174.7 | |||||||
| 180.1 | ||||||||||||
| Middle Toarcian | 180.4 * | |||||||||||
| Serpentinum/Falciferum/Tenuicostatum | 182 | |||||||||||
| Early Toarcian | 182.9 * | |||||||||||
| Pliensbachian | Late Pliensbachian/Early Pliensbachian | Jurassic 2 | Spinatum/Margaritatus/Davoei/Ibex/Jamesoni | 184.2 | ||||||||
| Sinemurian | Late Sinemurian/Early Sinemurian | Jurassic 1 | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | 192.9 | ||||||||
| Hettangian | Late Hettangian/Middle Hettangian/Early Hettangian | Angulata/Liasicus/Planorbis | 199.5 | |||||||||
| 201.4 | ||||||||||||