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. 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
- 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
- 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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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
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 126734 collections
| International Chronostratigraphic Timescale | Ten Million Year Bins | Ammonite Chrons of North America | Permian-Jurassic of New Zealand | Ammonite Chrons of Northwest Europe | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jurassic | Late Jurassic | Tithonian | Jurassic 6 | Oteke | Puaroan | 145 | ||||||||
| Kimmeridgian | Jurassic 5 | 149.2 | ||||||||||||
| Kawhia | Ohauan | 150 | ||||||||||||
| Heterian | 154.5 | |||||||||||||
| Oxfordian | 154.8 | |||||||||||||
| Middle Jurassic | Callovian | 161.5 | ||||||||||||
| Temaikan | 164.3 | |||||||||||||
| Bathonian | Jurassic 4 | 165.3 | ||||||||||||
| Bajocian | Epizigzagiceras | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | |||||||||||
| Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense | Humphresianum | 168.4 | ||||||||||||
| Aalenian | Jurassic 3 | Howelli/Scissum/Westermanni | Concavum/Murchisonae/Opalinum | 170.9 | ||||||||||
| Early Jurassic | Toarcian | Yakounensis/Hillebrandti/Crassicosta | Levesquei/Variabilis/Bifrons | Thouarsense | 174.7 | |||||||||
| Herangi | Ururoan | 176 | ||||||||||||
| 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 * | ||||||||||||
| Aratauran | 188.9 | |||||||||||||
| 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 | ||||||||||||||