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
- 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
- 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. 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 126700 collections
| International Chronostratigraphic Timescale | European Faunal Units | Ammonite Chrons of Northwest Europe | ||||||
|---|---|---|---|---|---|---|---|---|
| Quaternary | Holocene | Meghalayan | 0 | |||||
| Northgrippian | 0.0042 | |||||||
| Greenlandian | 0.0082 | |||||||
| Pleistocene | Late Pleistocene | 0.0117 | ||||||
| Chibanian | 0.129 | |||||||
| Calabrian | 0.774 | |||||||
| Gelasian | 1.8 | |||||||
| Neogene | Pliocene | Piacenzian | Villanyian | 2.58 | ||||
| Ruscinian | 3.1 * | |||||||
| Zanclean | 3.6 | |||||||
| Miocene | Messinian | Turolian | 5.333 | |||||
| Tortonian | 7.246 | |||||||
| Vallesian | 8.7 | |||||||
| Serravallian | Astaracian | 11.63 | ||||||
| Langhian | 13.82 | |||||||
| Burdigalian | Orleanian | 15.98 | ||||||
| Agenian | 20 | |||||||
| Aquitanian | 20.44 | |||||||
| Paleogene | Oligocene | Chattian | 23.03 | |||||
| Rupelian | 27.82 | |||||||
| Eocene | Priabonian | 33.9 | ||||||
| Bartonian | 37.71 | |||||||
| Lutetian | 41.2 | |||||||
| Ypresian | 47.8 | |||||||
| Paleocene | Thanetian | 56 | ||||||
| Selandian | 59.2 | |||||||
| Danian | 61.6 | |||||||
| Cretaceous | Late Cretaceous | Maastrichtian | 66 | |||||
| Campanian | 72.1 | |||||||
| Santonian | 83.6 | |||||||
| Coniacian | 86.3 | |||||||
| Turonian | 89.8 | |||||||
| Cenomanian | 93.9 | |||||||
| Early Cretaceous | Albian | 100.5 | ||||||
| Aptian | 113 | |||||||
| Barremian | 121.4 | |||||||
| Hauterivian | 125.77 | |||||||
| Valanginian | 132.6 | |||||||
| Berriasian | 139.8 | |||||||
| Jurassic | Late Jurassic | Tithonian | 145 | |||||
| Kimmeridgian | 149.2 | |||||||
| Oxfordian | 154.8 | |||||||
| Middle Jurassic | Callovian | 161.5 | ||||||
| Bathonian | 165.3 | |||||||
| Bajocian | Parkinsoni/Garantiana/Subfurcatum/Sauzei/Laeviuscula/Discites | 168.2 | ||||||
| Humphresianum | 168.4 | |||||||
| Aalenian | Concavum/Murchisonae/Opalinum | 170.9 | ||||||
| Early Jurassic | Toarcian | Levesquei/Variabilis/Bifrons | Thouarsense | 174.7 | ||||
| 180.1 | ||||||||
| Serpentinum/Falciferum/Tenuicostatum | 182 | |||||||
| Pliensbachian | Spinatum/Margaritatus/Davoei/Ibex/Jamesoni | 184.2 | ||||||
| Sinemurian | Raricostatum/Oxynotum/Obtusum/Turneri/Semicostatum/Bucklandi | 192.9 | ||||||
| Hettangian | Angulata/Liasicus/Planorbis | 199.5 | ||||||
| Triassic | Late Triassic | Rhaetian | 201.4 | |||||
| Norian | 208.5 | |||||||
| Carnian | 227 | |||||||
| Middle Triassic | Ladinian | 237 | ||||||
| Anisian | 242 | |||||||
| Early Triassic | Olenekian | 247.2 | ||||||
| Induan | 251.2 | |||||||
| 251.902 | ||||||||