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
- 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, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. F. Steininger, W. A. Berggren, D. V. Kent, R. L. Bernor, S. Sen and J. Agusti. 1996. Circum-Mediterranean Neogene (Miocene and Pliocene) marine-continental chronologic correlations of European mammal units. The Evolution of Western Eurasian Neogene Mammal Faunas (eds. R. L. Bernor, V. Fahlbusch, and H.-W. Mittmann) view
- M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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 126606 collections
| International Chronostratigraphic Timescale | Ordovician of North America | Ordovician of Ibero-Bohemia | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ordovician | Late Ordovician | Hirnantian | Cincinnatian | Gamachian | Kosovian | 443.8 | |||||||||||||
| Katian | Kralodvorian | Bohdalec † | 445.2 | ||||||||||||||||
| Richmondian | 446 * | ||||||||||||||||||
| Berounian | 449.7 * | ||||||||||||||||||
| Maysvillian | Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian | 449.8 * | |||||||||||||||||
| Edenian | 450.4 * | ||||||||||||||||||
| Mohawkian | Chatfieldian | 451.1 * | |||||||||||||||||
| Sandbian | 453 | ||||||||||||||||||
| Turinian | 453.7 * | ||||||||||||||||||
| Zahorany †/Vinice | Letna † | 456.2 * | |||||||||||||||||
| Whiterockian | Canadian † | Chazyan †/Marmor | 457 * | ||||||||||||||||
| Liben † | 458 * | ||||||||||||||||||
| Middle Ordovician | Darriwilian | 458.4 | |||||||||||||||||
| Dobrotivian | 458.5 * | ||||||||||||||||||
| Oretanian | 459.7 * | ||||||||||||||||||
| Sarka † | 461.7 * | ||||||||||||||||||
| Dapingian | Klabava † | 467.3 | |||||||||||||||||
| Arenigian | 468 | ||||||||||||||||||
| Rangerian | 469.1 * | ||||||||||||||||||
| Early Ordovician | Floian | Ibexian | Blackhillsian | Jeffersonian † | Cassinian † | 470 | |||||||||||||
| Tulean | 473.9 * | ||||||||||||||||||
| Tremadocian | Tremadocian | 477.7 | |||||||||||||||||
| Stairsian | 480.3 * | ||||||||||||||||||
| Skullrockian/Demingian | 482 * | ||||||||||||||||||
| 485.4 | |||||||||||||||||||
| 487.5 | |||||||||||||||||||