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
- 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
- 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
- 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
- M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 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
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 126700 collections
International Chronostratigraphic Timescale | Ammonite Chrons of North America | Ten Million Year Bins | Ammonite Chrons of Northwest Europe | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jurassic | Late Jurassic | Tithonian | Jurassic 6 | 145 | |||||||||
Kimmeridgian | Jurassic 5 | 149.2 | |||||||||||
Oxfordian | 154.8 | ||||||||||||
Middle Jurassic | Callovian | 161.5 | |||||||||||
Bathonian | Jurassic 4 | 165.3 | |||||||||||
Bajocian | Epizigzagiceras | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | ||||||||||
Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense | Humphresianum | 168.4 | |||||||||||
Aalenian | Howelli/Scissum/Westermanni | Jurassic 3 | 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 | Jurassic 2 | 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 | Jurassic 1 | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | 192.9 | ||||||||||
Pseudaetomoceras | Psiloceras | 196.4 * | |||||||||||
Franziceras/Euphyllites | 196.5 * | ||||||||||||
Hettangian | Angulata/Liasicus/Planorbis | 199.5 | |||||||||||
201.4 |