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
- 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, 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 126844 collections
| International Chronostratigraphic Timescale | Ammonite Chrons of Northwest Europe | Permian of the Russian Platform | |||||
|---|---|---|---|---|---|---|---|
| Jurassic | Middle Jurassic | Bajocian | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | |||
| Humphresianum | 168.4 | ||||||
| Aalenian | Concavum/Murchisonae/Opalinum | 170.9 | |||||
| Early Jurassic | Toarcian | Levesquei/Variabilis/Bifrons | Thouarsense | 174.7 | |||
| 180.1 | |||||||
| Serpentinum/Falciferum/Tenuicostatum | 182 | ||||||
| Pliensbachian | Spinatum/Margaritatus/Davoei/Ibex/Jamesoni | 184.2 | |||||
| Sinemurian | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | 192.9 | |||||
| Hettangian | Angulata/Liasicus/Planorbis | 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 | ||||||
| Tatarian | Vyatkian | 256.8 * | |||||
| Guadalupian | Capitanian | Severodvinian | 259.51 | ||||
| Wordian | Urzhumian | 264.28 | |||||
| Roadian | Kazanian | Povolzhian | 266.9 | ||||
| Sokian | 270.7 * | ||||||
| Cisuralian | Kungurian | Kungurian | Irenian/Ufimian | 273.01 | |||
| Filipovian | 276.5 * | ||||||
| Saraninian | 280.1 * | ||||||
| Artinskian | Artinskian | Sarginian | 283.5 | ||||
| Irginian | 285.9 * | ||||||
| Burtsevian | 287.8 * | ||||||
| Sakmarian | Sakmarian | Sterlitamakian | 290.1 | ||||
| Tastubian | 291.7 * | ||||||
| Asselian | Asselian | Shikhanian | 293.52 | ||||
| Uskalykian | 294.8 | ||||||
| Surenian | 297.5 | ||||||
| 298.9 | |||||||