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, 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
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 | Cambrian of Kazakhstan | Ammonite Chrons of Northwest Europe | Carboniferous of China | ||||
|---|---|---|---|---|---|---|---|
| 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 | ||||||
| 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 | 298.9 | ||||
| Xiaodushanian | 300 * | ||||||
| Kasimovian | 303.7 | ||||||
| Dalaun | 305.8 * | ||||||
| Moscovian | 307 | ||||||
| Bashkirian | 315.2 | ||||||
| Huashibanian | 318.5 * | ||||||
| Lousuan | 321.2 * | ||||||
| Mississippian | Serpukhovian | Dewunian | 323.2 | ||||
| Shangsian | 330.8 * | ||||||
| Visean | 330.9 | ||||||
| Jiusian | 335 * | ||||||
| Tournaisian | Tangbagouan | 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 | Ungurian | 477.7 | |||||
| Cambrian | Furongian | Stage 10 | Batyrbaian | 485.4 | |||
| Jiangshanian | 489.5 | ||||||
| Aksaian | 490.7 * | ||||||
| Sakian | 492.2 * | ||||||
| Paibian | 494 | ||||||
| Miaolingian | Guzhangian | Ayusokkanian | 497 | ||||
| 499.5 | |||||||
| Drumian | Zhanaarykian | 500.5 | |||||
| Tuesaian | 503 | ||||||
| Wuliuan | 504.5 | ||||||
| 505.3 | |||||||
| Series 2 | Stage 4 | 509 | |||||
| Toyonian | 510 * | ||||||
| Botomian | 512.5 * | ||||||
| Stage 3 | 514 | ||||||
| Atdabanian | 515.6 * | ||||||
| Terreneuvian | Stage 2 | Tommotian | 521 | ||||
| 525.5 | |||||||