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. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) 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
- 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 127252 collections
| International Chronostratigraphic Timescale | Permian-Jurassic of New Zealand | Cambrian of West Avalonia | Ordovician of Britain | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Jurassic | Late Jurassic | Tithonian | Oteke | Puaroan | 145 | |||||
| Kimmeridgian | 149.2 | |||||||||
| Kawhia | Ohauan | 150 | ||||||||
| Heterian | 154.5 | |||||||||
| Oxfordian | 154.8 | |||||||||
| Middle Jurassic | Callovian | 161.5 | ||||||||
| Temaikan | 164.3 | |||||||||
| Bathonian | 165.3 | |||||||||
| Bajocian | 168.2 | |||||||||
| Aalenian | 170.9 | |||||||||
| Early Jurassic | Toarcian | 174.7 | ||||||||
| Herangi | Ururoan | 176 | ||||||||
| Pliensbachian | 184.2 | |||||||||
| Aratauran | 188.9 | |||||||||
| Sinemurian | 192.9 | |||||||||
| Hettangian | 199.5 | |||||||||
| Triassic | Late Triassic | Rhaetian | Balfour | Otapirian | 201.4 | |||||
| Norian | Warepan | 208.5 | ||||||||
| Otamitan | 217 | |||||||||
| Oretian | 221 | |||||||||
| Carnian | 227 | |||||||||
| Gore | Kaihikuan | 227.5 | ||||||||
| Middle Triassic | Ladinian | 237 | ||||||||
| Etalian | 238 | |||||||||
| Anisian | 242 | |||||||||
| Malakovian | 246 | |||||||||
| Early Triassic | Olenekian | 247.2 | ||||||||
| Nelsonian | 249 | |||||||||
| Induan | 251.2 | |||||||||
| DUrville | Makarewan | 251.5 | ||||||||
| Permian | Lopingian | Changhsingian | 251.902 | |||||||
| Waiitian | 253.2 | |||||||||
| Wuchiapingian | 254.14 | |||||||||
| Puruhauan | 254.2 | |||||||||
| Guadalupian | Capitanian | Aparima | Flettian | 259.51 | ||||||
| Wordian | 264.28 | |||||||||
| Barettian | 266 | |||||||||
| Roadian | 266.9 | |||||||||
| Cisuralian | Kungurian | 273.01 | ||||||||
| Mangapirian | 276 | |||||||||
| Artinskian | 283.5 | |||||||||
| Telfordian | 285 | |||||||||
| 288.5 | ||||||||||
| 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 | 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 | Ashgill | Hirnantian | 443.8 | |||||
| Katian | Rawtheyan | 445.2 | ||||||||
| Cautleyan | 448.9 * | |||||||||
| Pusgillian | 449.3 * | |||||||||
| Caradoc | Streffordian | Onnian † | 449.6 * | |||||||
| Cheneyan | 451.5 * | |||||||||
| Burrellian | 452.7 * | |||||||||
| Sandbian | 453 | |||||||||
| Actonian † | 453.2 * | |||||||||
| Marshbrookian † | Woolstonian † | 454.2 * | ||||||||
| Longvillian † | 455.2 * | |||||||||
| Aurelucian | 456.8 * | |||||||||
| Soudleyan †/Harnagian/Costonian | 457.4 * | |||||||||
| Middle Ordovician | Darriwilian | Llanvirn | Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn | 458.4 | ||||||
| Abereiddian/Early Llanvirn | 461.3 * | |||||||||
| Dapingian | 467.3 | |||||||||
| Arenig | Fennian | 468.4 * | ||||||||
| Early Ordovician | Floian | 470 | ||||||||
| Whitlandian | 471.1 * | |||||||||
| Moridunian | 474.3 * | |||||||||
| Tremadocian | Tremadoc | Migneintian | 477.7 | |||||||
| Cressagian | 480.8 * | |||||||||
| 485 * | ||||||||||
| Cambrian | Furongian | Stage 10 | 485.4 | |||||||
| Jiangshanian | 489.5 | |||||||||
| Paibian | 494 | |||||||||
| Miaolingian | Guzhangian | 497 | ||||||||
| Arcadian | 498.4 | |||||||||
| Drumian | 500.5 | |||||||||
| Wuliuan | 504.5 | |||||||||
| Series 2 | Stage 4 | Branchian | 509 | |||||||
| Stage 3 | 514 | |||||||||
| Placentian | 517.1 | |||||||||
| Terreneuvian | Stage 2 | 521 | ||||||||
| Fortunian | 529 | |||||||||
| 538.8 | ||||||||||