PBDB Interval

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
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, 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

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 127017 collections

Show less time

Show linear time

International Chronostratigraphic Timescale			Cenozoic Subepochs	Carboniferous Subepochs			Carboniferous of Western Europe
Quaternary	Holocene	Meghalayan						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					2.58
	Pliocene	Zanclean	Early Pliocene					3.6
	Miocene	Messinian	Late Miocene					5.333
		Tortonian	Late Miocene					7.246
		Serravallian	Middle Miocene					11.63
		Langhian	Middle Miocene					13.82
		Burdigalian	Early Miocene					15.98
		Aquitanian	Early Miocene					20.44
Paleogene	Oligocene	Chattian	Late Oligocene					23.03
	Oligocene	Rupelian	Early Oligocene					27.82
	Eocene	Priabonian	Late Eocene					33.9
		Bartonian	Middle Eocene					37.71
		Lutetian	Middle Eocene					41.2
		Ypresian	Early Eocene					47.8
	Paleocene	Thanetian	Late Paleocene					56
		Selandian	Middle Paleocene					59.2
		Danian	Early Paleocene					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						168.2
		Aalenian						170.9
	Early Jurassic	Toarcian						174.7
		Pliensbachian						184.2
		Sinemurian						192.9
		Hettangian						199.5
Triassic	Late Triassic	Rhaetian						201.4
		Norian						208.5
		Carnian						227
	Middle Triassic	Ladinian						237
	Middle Triassic	Anisian						242
	Early Triassic	Olenekian						247.2
	Early Triassic	Induan						251.2
Permian	Lopingian	Changhsingian						251.902
	Lopingian	Wuchiapingian						254.14
	Guadalupian	Capitanian						259.51
		Wordian						264.28
		Roadian						266.9
	Cisuralian	Kungurian						273.01
		Artinskian						283.5
		Sakmarian						290.1
		Asselian						293.52
		Asselian					Kuzel	297.7
Carboniferous	Pennsylvanian	Gzhelian		Late Pennsylvanian	298.9		Kuzel
					Stephanian	Stephanian C	300.3 *
						Stephanian B	300.9 *
						Stephanian A	301.4 *
		Kasimovian				Stephanian A	303.7
		Kasimovian				Cantabrian	305 *
		Moscovian		Middle Pennsylvanian		Cantabrian	307
					Westphalian	Westphalian D	307.4 *
						Westphalian C	309.8
						Westphalian B	314.6
		Bashkirian		Early Pennsylvanian		Westphalian B	315.2
						Westphalian A	317 *
					Namurian	Yeadonian	318.8 *
						Marsdenian	320.2 *
						Kinderscoutian	321.5 *
						Alportian	322 *
						Chokierian	323.1 *
	Mississippian	Serpukhovian		Late Mississippian		Chokierian	323.2
						Arnsbergian	324 *
						Pendleian	327.4 *
		Visean		Middle Mississippian	Warnantian	Brigantian †	330.9
					Livian	Asbian †	336.3 *
					Moliniacian	Holkerian †/Arundian/Chadian	340.2 *
		Tournaisian		Early Mississippian	Ivorian		346.7
		Tournaisian	Hastarian	Early Mississippian	353.7 *
Devonian	Late Devonian	Famennian			358.9
	Late Devonian	Frasnian			372.2
	Middle Devonian	Givetian			382.7
	Middle Devonian	Eifelian			387.7
	Early Devonian	Emsian			393.3
		Pragian			407.6
		Lochkovian			410.8
								419.2