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
- 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
- Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
- B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 126164 collections
International Chronostratigraphic Timescale | Ordovician of Australia | Ordovician of China | Ordovician of Britain | Ordovician of North America | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Bolindian | Hirnantian | Xiaoxita †/Shikou | Wufeng † | Ashgill | Hirnantian | Cincinnatian | Gamachian | 443.8 | |||||||||
Katian | Chientangkiangian | Rawtheyan | 445.2 | |||||||||||||||||
Richmondian | 446 * | |||||||||||||||||||
Cautleyan | 448.9 * | |||||||||||||||||||
Eastonian | 449 * | |||||||||||||||||||
Pusgillian | 449.3 * | |||||||||||||||||||
Neichianshanian/Hanjiang | 449.5 | |||||||||||||||||||
Caradoc | Streffordian | Onnian † | 449.6 * | |||||||||||||||||
Maysvillian | Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian | 449.8 * | ||||||||||||||||||
Edenian | 450.4 * | |||||||||||||||||||
Mohawkian | Chatfieldian | 451.1 * | ||||||||||||||||||
Cheneyan | 451.5 * | |||||||||||||||||||
Gisbornian | 452 * | |||||||||||||||||||
Burrellian | 452.7 * | |||||||||||||||||||
Sandbian | 453 | |||||||||||||||||||
Actonian † | 453.2 * | |||||||||||||||||||
Turinian | 453.7 * | |||||||||||||||||||
Marshbrookian † | Woolstonian † | 454.2 * | ||||||||||||||||||
Longvillian † | 455.2 * | |||||||||||||||||||
Aurelucian | 456.8 * | |||||||||||||||||||
Whiterockian | Canadian † | Chazyan †/Marmor | 457 * | |||||||||||||||||
Soudleyan †/Harnagian/Costonian | 457.4 * | |||||||||||||||||||
Middle Ordovician | Darriwilian | Darriwilian | Darriwilian | Guniu †/Hulo | Llanvirn | Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn | 458.4 | |||||||||||||
Abereiddian/Early Llanvirn | 461.3 * | |||||||||||||||||||
Hunjiang † | Dawan †/Daobaowan/Ningkuo | 466.3 * | ||||||||||||||||||
Dapingian | Yapeenian | Dapingian | 467.3 | |||||||||||||||||
Arenig | Fennian | 468.4 * | ||||||||||||||||||
Castlemainian | 468.5 * | |||||||||||||||||||
Rangerian | 469.1 * | |||||||||||||||||||
Early Ordovician | Floian | Chewtonian | Yiyangian | Ibexian | Blackhillsian | Jeffersonian † | Cassinian † | 470 | ||||||||||||
Whitlandian | 471.1 * | |||||||||||||||||||
Bendigonian | 471.8 * | |||||||||||||||||||
Lancefieldian | 473.5 * | |||||||||||||||||||
Tulean | 473.9 * | |||||||||||||||||||
Moridunian | 474.3 * | |||||||||||||||||||
Tremadocian | Xinchangian | Tremadoc | Migneintian | 477.7 | ||||||||||||||||
Lianghekou † | 477.9 * | |||||||||||||||||||
Stairsian | 480.3 * | |||||||||||||||||||
Cressagian | 480.8 * | |||||||||||||||||||
Skullrockian/Demingian | 482 * | |||||||||||||||||||
Warendian | 482.8 * | |||||||||||||||||||
485 * | ||||||||||||||||||||
485.4 | ||||||||||||||||||||
487.5 |