PBDB Timescale

Ordovician of China

The interval definitions in this timescale are derived from the following sources:

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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. view
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 9 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 98 collections

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International Chronostratigraphic Timescale			Ordovician of China			Obsolete Names for ICS Units			Ten Million Year Bins	Ordovician of Australia	Cambrian of Siberia
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					298.9
		Kasimovian	303.7						Carboniferous 5
		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	Hirnantian	Xiaoxita †/Shikou	Wufeng †			Ordovician 5	Bolindian	443.8
		Katian	Chientangkiangian						Bolindian	445.2
			Chientangkiangian						Eastonian	449 *
			Neichianshanian/Hanjiang			449.5			Eastonian
						Gisbornian			452 *
		Sandbian				Gisbornian		Ordovician 4	453
	Middle Ordovician	Darriwilian	Darriwilian	Guniu †/Hulo		Ordovician 3		Darriwilian	458.4
		Darriwilian	Darriwilian	Hunjiang †	Dawan †/Daobaowan/Ningkuo	Ordovician 3		Darriwilian	466.3 *
		Dapingian	Dapingian			Ordovician 2		Yapeenian	467.3
		Dapingian	Dapingian					Castlemainian	468.5 *
	Early Ordovician	Floian	Yiyangian					Chewtonian	470
								Bendigonian	471.8 *
								Lancefieldian	473.5 *
		Tremadocian	Xinchangian			Ordovician 1			477.7
					Lianghekou †				477.9 *
								Warendian	482.8 *
								Warendian	Mansian †	483.55 *
Cambrian	Furongian	Stage 10				Cambrian 5			Batyrbaian	Tavgian †	Ketyan †/Yurakian	485.4
		Jiangshanian							Batyrbaian			489.5
									Aksaian			490.7 *
									Sakian			492.2 *
		Paibian										494
		Paibian									Ensyan †/Maduan/Nganasanian	494.7 *
	Miaolingian	Guzhangian				Series 3 †			Cambrian 4	Ayusokkanian			497
		Guzhangian								Mayan/Menevian			499.5
		Drumian								Mayan/Menevian			500.5
		Wuliuan					Stage 5 †		Cambrian 3	Amgan/Solvan			504.5
	Series 2	Stage 4								Amgan/Solvan			509
										Toyonian	Lenian †		510 *
										Botomian			512.5 *
		Stage 3							Cambrian 2	Botomian			514
		Stage 3								Atdabanian			515.6 *
	Terreneuvian	Stage 2								Tommotian			521
		Stage 2								Nemakit-Daldynian			525.5
		Fortunian							Cambrian 1	Nemakit-Daldynian	Manykaian †		529
														538.8