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, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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

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 126662 collections

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International Chronostratigraphic Timescale			Ordovician of China			Obsolete Names for ICS Units			Ten Million Year Bins	Devonian Subages	Obsolete Carboniferous Ages of China
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							Permian 1			293.52
Carboniferous	Pennsylvanian	Gzhelian							Carboniferous 5		Mapingian †	298.9
		Kasimovian	303.7								Mapingian †
		Kasimovian		305.9
		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	Late Famennian			358.9
					Middle Famennian			365.3 *
					Early Famennian			368.5 *
		Frasnian		Devonian 4	Late Frasnian			372.2
					Middle Frasnian			375.4 *
					Early Frasnian			379.3 *
	Middle Devonian	Givetian		Devonian 3	Late Givetian			382.7
					Middle Givetian			383.7 *
					Early Givetian			385.9 *
		Eifelian			Late Eifelian			387.7
		Eifelian			Early Eifelian			390.3 *
	Early Devonian	Emsian		Devonian 2	Late Emsian			393.3
		Emsian		Devonian 2	Early Emsian			398.3 *
		Pragian		Devonian 1	Pragian			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		Hirnantian		Xiaoxita †/Shikou		Wufeng †	Ordovician 5	443.8
		Katian		Chientangkiangian				Wufeng †		445.2
		Katian		Neichianshanian/Hanjiang						449.5
		Sandbian		Neichianshanian/Hanjiang					Ordovician 4	453
	Middle Ordovician	Darriwilian		Darriwilian		Guniu †/Hulo			Ordovician 3	458.4
		Darriwilian		Darriwilian		Hunjiang †		Dawan †/Daobaowan/Ningkuo	Ordovician 3	466.3 *
		Dapingian		Dapingian					Ordovician 2	467.3
	Early Ordovician	Floian		Yiyangian					Ordovician 2	470
		Tremadocian		Xinchangian					Ordovician 1	477.7
		Tremadocian		Xinchangian				Lianghekou †	Ordovician 1	477.9 *
Cambrian	Furongian	Stage 10							Cambrian 5	485.4
		Jiangshanian								489.5
		Paibian								494
	Miaolingian	Guzhangian							Series 3 †	Cambrian 4	497
		Drumian								Cambrian 4	500.5
		Wuliuan					Stage 5 †			Cambrian 3	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