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
- M. O. Woodburne. 1987. A prospectus of the North American Mammal Ages. In: Woodburne, M. O. (ed.), Cenozoic Mammals of North America. University of California Press, Berkelery, CA 285-290 view
- J. Alroy. 2000. New methods for quantifying macroevolutionary patterns and processes. Paleobiology 26(4):707-733 view
- A. D. Barnosky, M. Holmes, R. Kirchholtes, E. Lindsey, K.C. Maguire, A.W. Poust, M.A. Stegner, J. Sunseri, B. Swartz, J. Swift, N.A. Villavicencio and G. Wogan. 2014. Prelude to the Anthropocene: Two new North American Land Mammal Ages (NALMAs). The Anthropocene Review I(3):225-242 view
- J. A. Lillegraven and M. C. McKenna. 1986. Fossil mammals from the "Mesaverde" Formation (Late Cretaceous, Judithian) of the Bighorn and Wind River basins, Wyoming, with definitions of Late Cretaceous North American Land-Mammal "Ages". American Museum Novitates 2840:1-68 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
- 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 the Baltic | Ordovician of North America | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ordovician | Late Ordovician | Hirnantian | Harju | Porkuni | Cincinnatian | Gamachian | 443.8 | ||||||||||
Katian | Pirgu | 445.2 | |||||||||||||||
Richmondian | 446 * | ||||||||||||||||
Vormsi | 449.6 * | ||||||||||||||||
Maysvillian | Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian | 449.8 * | |||||||||||||||
Nabala | Johvi † | 450 * | |||||||||||||||
Edenian | 450.4 * | ||||||||||||||||
Viru | Rakvere | 450.6 * | |||||||||||||||
Mohawkian | Chatfieldian | 451.1 * | |||||||||||||||
Oandu | 452 * | ||||||||||||||||
Sandbian | Keila | Idavere † | 453 | ||||||||||||||
Turinian | 453.7 * | ||||||||||||||||
Haljala | 453.9 | ||||||||||||||||
Kukruse | 456.4 * | ||||||||||||||||
Whiterockian | Canadian † | Chazyan †/Marmor | 457 * | ||||||||||||||
Uhaku | Aluoja † | 457.5 * | |||||||||||||||
Middle Ordovician | Darriwilian | 458.4 | |||||||||||||||
Lasnamagi | 458.9 * | ||||||||||||||||
Aseri | 460.4 * | ||||||||||||||||
Oeland | Kunda | 462.9 * | |||||||||||||||
Valaste †/Hunderum | 464.3 * | ||||||||||||||||
Volkhov | Langevoja †/Vaana/Saka | 467.1 * | |||||||||||||||
Dapingian | 467.3 | ||||||||||||||||
Rangerian | 469.1 * | ||||||||||||||||
Billingen | 469.3 * | ||||||||||||||||
Early Ordovician | Floian | Ibexian | Blackhillsian | Jeffersonian † | Cassinian † | 470 | |||||||||||
Latorp † | 470.1 * | ||||||||||||||||
Hunneberg | 473.7 * | ||||||||||||||||
Tulean | 473.9 * | ||||||||||||||||
Tremadocian | 477.7 | ||||||||||||||||
Stairsian | 480.3 * | ||||||||||||||||
Varangu | 481.3 * | ||||||||||||||||
Skullrockian/Demingian | 482 * | ||||||||||||||||
Pakerort | 482.2 * | ||||||||||||||||
485.4 * | |||||||||||||||||
486.3 | |||||||||||||||||
486.5 | |||||||||||||||||
487.5 |