PBDB Timescale

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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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. 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 126762 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ten Million Year Bins	Cambrian of China		Cenozoic Subepochs	Cambrian Epochs	European Faunal Units
Quaternary	Holocene	Meghalayan	Cenozoic 6						0
		Northgrippian							0.0042
		Greenlandian							0.0082
	Pleistocene	Late Pleistocene				Late Pleistocene			0.0117
		Chibanian				Middle Pleistocene			0.129
		Calabrian				Early Pleistocene			0.774
		Gelasian				Early Pleistocene			1.8
Neogene	Pliocene	Piacenzian				Late Pliocene		Villanyian	2.58
		Piacenzian				Late Pliocene		Ruscinian	3.1 *
		Zanclean				Early Pliocene		Ruscinian	3.6
	Miocene	Messinian				Late Miocene		Turolian	5.333
		Tortonian						Turolian	7.246
		Tortonian						Vallesian	8.7
		Serravallian	Cenozoic 5			Middle Miocene		Astaracian	11.63
		Langhian				Middle Miocene		Astaracian	13.82
		Burdigalian				Early Miocene		Orleanian	15.98
		Burdigalian						Agenian	20
		Aquitanian						Agenian	20.44
Paleogene	Oligocene	Chattian	Cenozoic 4			Late Oligocene			23.03
	Oligocene	Rupelian	Cenozoic 4			Early Oligocene			27.82
	Eocene	Priabonian	Cenozoic 3			Late Eocene			33.9
		Bartonian	Cenozoic 3			Middle Eocene			37.71
		Lutetian	Cenozoic 2			Middle Eocene			41.2
		Ypresian	Cenozoic 2			Early Eocene			47.8
	Paleocene	Thanetian	Cenozoic 1			Late Paleocene			56
		Selandian				Middle Paleocene			59.2
		Danian				Early Paleocene			61.6
Cretaceous	Late Cretaceous	Maastrichtian	Cretaceous 8						66
		Campanian	Cretaceous 7						72.1
		Santonian	Cretaceous 6						83.6
		Coniacian							86.3
		Turonian							89.8
		Cenomanian	Cretaceous 5						93.9
	Early Cretaceous	Albian	Cretaceous 4						100.5
		Aptian	Cretaceous 3						113
		Barremian	Cretaceous 2						121.4
		Hauterivian	Cretaceous 2						125.77
		Valanginian	Cretaceous 1						132.6
		Berriasian	Cretaceous 1						139.8
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	Jurassic 4						168.2
		Aalenian	Jurassic 3						170.9
	Early Jurassic	Toarcian	Jurassic 3						174.7
		Pliensbachian	Jurassic 2						184.2
		Sinemurian	Jurassic 1						192.9
		Hettangian	Jurassic 1						199.5
Triassic	Late Triassic	Rhaetian	Triassic 4						201.4
		Norian	Triassic 4						208.5
		Carnian	Triassic 3						227
	Middle Triassic	Ladinian	Triassic 2						237
	Middle Triassic	Anisian	Triassic 2						242
	Early Triassic	Olenekian	Triassic 1						247.2
	Early Triassic	Induan	Triassic 1						251.2
Permian	Lopingian	Changhsingian	Permian 4						251.902
	Lopingian	Wuchiapingian							254.14
	Guadalupian	Capitanian							259.51
		Wordian							264.28
		Roadian	Permian 3						266.9
	Cisuralian	Kungurian	Permian 2						273.01
		Artinskian							283.5
		Sakmarian		290.1
		Asselian	Permian 1	293.52
Carboniferous	Pennsylvanian	Gzhelian	Carboniferous 5	298.9
		Kasimovian	Carboniferous 5	303.7
		Moscovian	Carboniferous 4	307
		Bashkirian	Carboniferous 4	315.2
	Mississippian	Serpukhovian	Carboniferous 3	323.2
		Visean	Carboniferous 2	330.9
		Tournaisian	Carboniferous 1	346.7
Devonian	Late Devonian	Famennian	Devonian 5	358.9
	Late Devonian	Frasnian	Devonian 4	372.2
	Middle Devonian	Givetian	Devonian 3	382.7
	Middle Devonian	Eifelian	Devonian 3	387.7
	Early Devonian	Emsian	Devonian 2	393.3
		Pragian	Devonian 1	407.6
		Lochkovian	Devonian 1	410.8
Silurian	Pridoli		Silurian 2	419.2
	Ludlow	Ludfordian		423
	Ludlow	Gorstian		425.6
	Wenlock	Homerian		427.4
	Wenlock	Sheinwoodian		430.5
	Llandovery	Telychian	Silurian 1	433.4
		Aeronian		438.5
		Rhuddanian		440.8
Ordovician	Late Ordovician	Hirnantian	Ordovician 5	443.8
		Katian	Ordovician 5	445.2
		Sandbian	Ordovician 4	453
	Middle Ordovician	Darriwilian	Ordovician 3	458.4
	Middle Ordovician	Dapingian	Ordovician 2	467.3
	Early Ordovician	Floian	Ordovician 2	470
	Early Ordovician	Tremadocian	Ordovician 1	477.7
Cambrian	Furongian	Stage 10	Cambrian 5	Niuchehean	Taoyuanian †	Late Cambrian	485.4
		Jiangshanian		Jiangshanian			489.5
		Paibian		Paibian			494
		Paibian		Paibian	Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian	Cambrian 4	Guzhangian	Wangcunian †	Middle Cambrian	497
		Drumian	Cambrian 4	Drumian	Wangcunian †		500.5
		Wuliuan	Cambrian 3	Wuliuan/Taijangian			504.5
	Series 2	Stage 4	Cambrian 3	Duyunian		Early Cambrian	509
	Series 2	Stage 3	Cambrian 2	Nangaoian			514
	Terreneuvian	Stage 2	Cambrian 2	Meishucunian			521
		Fortunian	Cambrian 1	Meishucunian			529
		Fortunian	Cambrian 1	Jinnigian			530.7
									538.8