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, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
- 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
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 127249 collections
International Chronostratigraphic Timescale | Ammonite Chrons of North America | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jurassic | Late Jurassic | Tithonian | 145 | ||||||||||
Kimmeridgian | 149.2 | ||||||||||||
Oxfordian | 154.8 | ||||||||||||
Middle Jurassic | Callovian | 161.5 | |||||||||||
Bathonian | 165.3 | ||||||||||||
Bajocian | Epizigzagiceras | 168.2 | |||||||||||
Rotundum/Oblatum/Kirschneri/Crassicostatus/Widebayense | 168.4 | ||||||||||||
Aalenian | Howelli/Scissum/Westermanni | 170.9 | |||||||||||
Early Jurassic | Toarcian | Yakounensis/Hillebrandti/Crassicosta | 174.7 | ||||||||||
Planulata | 179.3 * | ||||||||||||
Arnioceras arnouldi | 179.8 * | ||||||||||||
Kanense | 181.3 * | ||||||||||||
Carlottense | 182.3 * | ||||||||||||
Kunae | 183.5 * | ||||||||||||
Pliensbachian | 184.2 | ||||||||||||
Freboldi | 185.1 * | ||||||||||||
Whiteavesi/Imlayi | Tetraspidoceras | 186.2 * | |||||||||||
189.2 * | |||||||||||||
Plesechioceras harbledownense/Asteroceras varians/Coroniceras | Canadensis | 190.3 * | |||||||||||
Sinemurian | 192.9 | ||||||||||||
Pseudaetomoceras | Psiloceras | 196.4 * | |||||||||||
Franziceras/Euphyllites | 196.5 * | ||||||||||||
Hettangian | 199.5 | ||||||||||||
201.4 |