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. 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
- 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
- J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- M. Freudenthal. 2006. Mammal Paleogene zones. personal communication 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 126163 collections
International Chronostratigraphic Timescale | Ammonite Chrons of North America | Ammonite Chrons of Northwest Europe | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jurassic | Late Jurassic | Tithonian | 145 | |||||||||||
Kimmeridgian | 149.2 | |||||||||||||
Oxfordian | 154.8 | |||||||||||||
Middle Jurassic | Callovian | 161.5 | ||||||||||||
Bathonian | 165.3 | |||||||||||||
Bajocian | Epizigzagiceras | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | |||||||||||
Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense | Humphresianum | 168.4 | ||||||||||||
Aalenian | Howelli/Scissum/Westermanni | Concavum/Murchisonae/Opalinum | 170.9 | |||||||||||
Early Jurassic | Toarcian | Yakounensis/Hillebrandti/Crassicosta | Levesquei/Variabilis/Bifrons | Thouarsense | 174.7 | |||||||||
Planulata | 179.3 * | |||||||||||||
Arnioceras arnouldi | 179.8 * | |||||||||||||
180.1 | ||||||||||||||
Kanense | 181.3 * | |||||||||||||
Serpentinum/Falciferum/Tenuicostatum | 182 | |||||||||||||
Carlottense | 182.3 * | |||||||||||||
Kunae | 183.5 * | |||||||||||||
Pliensbachian | Spinatum/Margaritatus/Davoei/Ibex/Jamesoni | 184.2 | ||||||||||||
Freboldi | 185.1 * | |||||||||||||
Whiteavesi/Imlayi | Tetraspidoceras | 186.2 * | ||||||||||||
189.2 * | ||||||||||||||
Plesechioceras harbledownense/Asteroceras varians/Coroniceras | Canadensis | 190.3 * | ||||||||||||
Sinemurian | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | 192.9 | ||||||||||||
Pseudaetomoceras | Psiloceras | 196.4 * | ||||||||||||
Franziceras/Euphyllites | 196.5 * | |||||||||||||
Hettangian | Angulata/Liasicus/Planorbis | 199.5 | ||||||||||||
201.4 |