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
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
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

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 126691 collections

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International Chronostratigraphic Timescale			Carboniferous of North America	Devonian Subages	Ten Million Year Bins	Obsolete Names for ICS Units
Quaternary	Holocene	Meghalayan			Cenozoic 6				0
		Northgrippian							0.0042
		Greenlandian							0.0082
	Pleistocene	Late Pleistocene							0.0117
		Chibanian							0.129
		Calabrian							0.774
		Gelasian							1.8
Neogene	Pliocene	Piacenzian				Tertiary †			2.58
	Pliocene	Zanclean							3.6
	Miocene	Messinian							5.333
		Tortonian							7.246
		Serravallian			Cenozoic 5				11.63
		Langhian							13.82
		Burdigalian							15.98
		Aquitanian							20.44
Paleogene	Oligocene	Chattian			Cenozoic 4				23.03
	Oligocene	Rupelian			Cenozoic 4				27.82
	Eocene	Priabonian			Cenozoic 3				33.9
		Bartonian			Cenozoic 3				37.71
		Lutetian			Cenozoic 2				41.2
		Ypresian			Cenozoic 2				47.8
	Paleocene	Thanetian			Cenozoic 1				56
		Selandian							59.2
		Danian							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					Longtanian †		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	Bursumian †		Permian 1				293.52
Carboniferous	Pennsylvanian	Gzhelian	Virgilian		Carboniferous 5				298.9
		Kasimovian	Missourian	303.7
		Kasimovian	Desmoinesian	305.9 *
		Moscovian	Desmoinesian	Carboniferous 4	307
		Moscovian	Atokan		312.7 *
		Bashkirian	Atokan		315.2
		Bashkirian	Morrowan		318.4 *
	Mississippian	Serpukhovian	Chesterian	Carboniferous 3	323.2
		Visean	Chesterian	Carboniferous 2	330.9
			Meramecian		335.8 *
			Osagean		343.1 *
		Tournaisian	Osagean	Carboniferous 1	346.7
		Tournaisian	Kinderhookian	Carboniferous 1	351.9 *
Devonian	Late Devonian	Famennian		Late Famennian	Devonian 5			358.9
				Middle Famennian				365.3 *
				Early Famennian				368.5 *
		Frasnian		Late Frasnian	Devonian 4			372.2
				Middle Frasnian				375.4 *
				Early Frasnian				379.3 *
	Middle Devonian	Givetian		Late Givetian	Devonian 3			382.7
				Middle Givetian				383.7 *
				Early Givetian				385.9 *
		Eifelian		Late Eifelian				387.7
		Eifelian		Early Eifelian				390.3 *
	Early Devonian	Emsian		Late Emsian	Devonian 2			393.3
		Emsian		Early Emsian	Devonian 2	398.3 *
		Pragian		Pragian	Devonian 1	407.6
		Lochkovian		Late Lochkovian		410.8
				Middle Lochkovian		412.8 *
				Early Lochkovian		415.6 *
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	485.4
		Jiangshanian				489.5
		Paibian				494
	Miaolingian	Guzhangian			Cambrian 4	Series 3 †		497
		Drumian			Cambrian 4			500.5
		Wuliuan			Cambrian 3		Stage 5 †	504.5
	Series 2	Stage 4			Cambrian 3			509
	Series 2	Stage 3			Cambrian 2			514
	Terreneuvian	Stage 2			Cambrian 2			521
	Terreneuvian	Fortunian			Cambrian 1			529
									538.8