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
- F. J. Prevosti, C. O. Romano, A. M. Forasiepi, S. Hemming, R. Bonini, A. M. Candela, E. Cerdeño, M. C. Madozzo Jaén, P. E. Ortiz, F. Pujos, L. Rasia, G. I. Schmidt, M. Taglioretti, R. D. E. MacPhee, and U. F. J. Pardiñas. 2021. New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America. Scientific Reports 2021(11):9830 view
- J. J. Flynn and C. C. Swisher, III. 1995. Cenozoic South American Land Mammal Ages: correlation to global geochronology. Geochronology Time Scales and Global Stratigraphic Correlation, SEPM Special Publication 54:317-333 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
- F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
- F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
- F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 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 126710 collections
| International Chronostratigraphic Timescale | Ammonite Chrons of Northwest Europe | Permian-Jurassic of New Zealand | Ten Million Year Bins | Mesozoic Subages | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jurassic | Late Jurassic | Tithonian | Oteke | Puaroan | Jurassic 6 | Late Tithonian | Middle Tithonian | 145 | ||||
| Early Tithonian | 146.3 * | |||||||||||
| Kimmeridgian | Jurassic 5 | Late Kimmeridgian | 149.2 | |||||||||
| Kawhia | Ohauan | 150 | ||||||||||
| Early Kimmeridgian | 152.2 * | |||||||||||
| Heterian | 154.5 | |||||||||||
| Oxfordian | Late Oxfordian | Middle Oxfordian/Early Oxfordian | 154.8 | |||||||||
| 157.9 * | ||||||||||||
| Middle Jurassic | Callovian | Late Callovian/Middle Callovian/Early Callovian | 161.5 | |||||||||
| Temaikan | 164.3 | |||||||||||
| Bathonian | Jurassic 4 | Late Bathonian/Middle Bathonian/Early Bathonian | 165.3 | |||||||||
| Bajocian | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | Late Bajocian | 168.2 | |||||||||
| Humphresianum | 168.4 | |||||||||||
| Early Bajocian | 168.6 * | |||||||||||
| Aalenian | Concavum/Murchisonae/Opalinum | Jurassic 3 | Late Aalenian/Middle Aalenian/Early Aalenian | 170.9 | ||||||||
| Early Jurassic | Toarcian | Levesquei/Variabilis/Bifrons | Thouarsense | Late Toarcian | 174.7 | |||||||
| Herangi | Ururoan | 176 | ||||||||||
| 180.1 | ||||||||||||
| Middle Toarcian | 180.4 * | |||||||||||
| Serpentinum/Falciferum/Tenuicostatum | 182 | |||||||||||
| Early Toarcian | 182.9 * | |||||||||||
| Pliensbachian | Spinatum/Margaritatus/Davoei/Ibex/Jamesoni | Jurassic 2 | Late Pliensbachian/Early Pliensbachian | 184.2 | ||||||||
| Aratauran | 188.9 | |||||||||||
| Sinemurian | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | Jurassic 1 | Late Sinemurian/Early Sinemurian | 192.9 | ||||||||
| Hettangian | Angulata/Liasicus/Planorbis | Late Hettangian/Middle Hettangian/Early Hettangian | 199.5 | |||||||||
| 201.4 | ||||||||||||