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, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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.
This timescale is used in the definition of 126764 collections
| International Chronostratigraphic Timescale | Devonian of France | Cambrian Epochs | Permian of the Salt Range | Cretaceous Subepochs | |||
|---|---|---|---|---|---|---|---|
| Cretaceous | Late Cretaceous | Maastrichtian | Senonian | 66 | |||
| Campanian | 72.1 | ||||||
| Santonian | 83.6 | ||||||
| Coniacian | 86.3 | ||||||
| Turonian | 89.8 | ||||||
| Cenomanian | 93.9 | ||||||
| Early Cretaceous | Albian | Gallic | 100.5 | ||||
| Aptian | 113 | ||||||
| Barremian | 121.4 | ||||||
| Hauterivian | Neocomian | 125.77 | |||||
| Valanginian | 132.6 | ||||||
| Berriasian | 139.8 | ||||||
| Jurassic | Late Jurassic | Tithonian | 145 | ||||
| Kimmeridgian | 149.2 | ||||||
| Oxfordian | 154.8 | ||||||
| Middle Jurassic | Callovian | 161.5 | |||||
| Bathonian | 165.3 | ||||||
| Bajocian | 168.2 | ||||||
| Aalenian | 170.9 | ||||||
| Early Jurassic | Toarcian | 174.7 | |||||
| Pliensbachian | 184.2 | ||||||
| Sinemurian | 192.9 | ||||||
| Hettangian | 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 | ||||||
| Kathwai | 251.5 * | ||||||
| Permian | Lopingian | Changhsingian | 251.902 | ||||
| 252.4 * | |||||||
| Chhidru | 252.9 * | ||||||
| Wuchiapingian | 254.14 | ||||||
| Kalabagh | 255 * | ||||||
| Wargal | 256 * | ||||||
| Guadalupian | Capitanian | 259.51 | |||||
| Wordian | 264.28 | ||||||
| 265.3 * | |||||||
| Amb | 266.1 * | ||||||
| Roadian | 266.9 | ||||||
| 270.7 * | |||||||
| Cisuralian | Kungurian | 273.01 | |||||
| Artinskian | 283.5 | ||||||
| Sakmarian | 290.1 | ||||||
| Asselian | 293.52 | ||||||
| Carboniferous | Pennsylvanian | Gzhelian | 298.9 | ||||
| Kasimovian | 303.7 | ||||||
| Moscovian | 307 | ||||||
| Bashkirian | 315.2 | ||||||
| Mississippian | Serpukhovian | 323.2 | |||||
| Visean | 330.9 | ||||||
| Tournaisian | 346.7 | ||||||
| Devonian | Late Devonian | Famennian | Famennian | 358.9 | |||
| Frasnian | Frasnian | 372.2 | |||||
| Middle Devonian | Givetian | Givetian | 382.7 | ||||
| Eifelian | Couvinien | 387.7 | |||||
| Early Devonian | Emsian | 393.3 | |||||
| Pragian | 407.6 | ||||||
| Coblencien | 408.2 * | ||||||
| Lochkovian | Gedinnine | 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 | Late Cambrian | 485.4 | |||
| Jiangshanian | 489.5 | ||||||
| Paibian | 494 | ||||||
| Miaolingian | Guzhangian | Middle Cambrian | 497 | ||||
| Drumian | 500.5 | ||||||
| Wuliuan | 504.5 | ||||||
| Series 2 | Stage 4 | Early Cambrian | 509 | ||||
| Stage 3 | 514 | ||||||
| Terreneuvian | Stage 2 | 521 | |||||
| Fortunian | 529 | ||||||
| 538.8 | |||||||