PBDB Timescale

Ordovician of Australia

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 377 collections

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International Chronostratigraphic Timescale			Ordovician of Australia	Ordovician of China			Obsolete Names for ICS Units			Cambrian of Siberia			Ordovician of the Baltic
Neogene	Pliocene	Piacenzian					Tertiary †									2.58
	Pliocene	Zanclean														3.6
	Miocene	Messinian														5.333
		Tortonian														7.246
		Serravallian														11.63
		Langhian														13.82
		Burdigalian														15.98
		Aquitanian														20.44
Paleogene	Oligocene	Chattian														23.03
	Oligocene	Rupelian														27.82
	Eocene	Priabonian														33.9
		Bartonian														37.71
		Lutetian														41.2
		Ypresian														47.8
	Paleocene	Thanetian														56
		Selandian														59.2
		Danian														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						Longtanian †								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
Carboniferous	Pennsylvanian	Gzhelian														298.9
		Kasimovian														303.7
		Moscovian														307
		Bashkirian														315.2
	Mississippian	Serpukhovian														323.2
		Visean														330.9
		Tournaisian														346.7
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
Silurian	Pridoli		419.2
	Ludlow	Ludfordian	423
	Ludlow	Gorstian	425.6
	Wenlock	Homerian	427.4
	Wenlock	Sheinwoodian	430.5
	Llandovery	Telychian	433.4
		Aeronian	438.5
		Rhuddanian	440.8
Ordovician	Late Ordovician	Hirnantian	Bolindian	Hirnantian	Xiaoxita †/Shikou	Wufeng †			Harju	Porkuni	443.8
		Katian	Bolindian	Chientangkiangian						Pirgu	445.2
			Eastonian	Chientangkiangian							449 *
				Neichianshanian/Hanjiang			449.5
							Vormsi			449.6 *
							Nabala			Johvi †	450 *
							Viru		Rakvere		450.6 *
			Gisbornian						Oandu		452 *
		Sandbian							Keila	Idavere †	453
									Haljala		453.9
									Kukruse		456.4 *
									Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian	Darriwilian	Darriwilian	Guniu †/Hulo				Uhaku		458.4
									Lasnamagi		458.9 *
									Aseri		460.4 *
							Oeland		Kunda		462.9 *
										Valaste †/Hunderum	464.3 *
					Hunjiang †	Dawan †/Daobaowan/Ningkuo					466.3 *
									Volkhov		Langevoja †/Vaana/Saka	467.1 *
		Dapingian	Yapeenian	Dapingian								467.3
			Castlemainian									468.5 *
			Castlemainian						Billingen			469.3 *
	Early Ordovician	Floian	Chewtonian	Yiyangian								470
			Chewtonian							Latorp †		470.1 *
			Bendigonian									471.8 *
			Lancefieldian									473.5 *
									Hunneberg			473.7 *
		Tremadocian		Xinchangian								477.7
						Lianghekou †						477.9 *
									Varangu			481.3 *
									Pakerort			482.2 *
			Warendian									482.8 *
			Warendian									Mansian †	483.55 *
Cambrian	Furongian	Stage 10								Batyrbaian		Tavgian †	Ketyan †/Yurakian	485.4
														486.3 *
								486.5
		Jiangshanian						489.5
								Aksaian		490.7 *
								Sakian		492.2 *
		Paibian								494
		Paibian								Ensyan †/Maduan/Nganasanian			494.7 *
	Miaolingian	Guzhangian						Series 3 †		Ayusokkanian				497
		Guzhangian								Mayan/Menevian				499.5
		Drumian								Mayan/Menevian				500.5
		Wuliuan								Stage 5 †				Amgan/Solvan	504.5
	Series 2	Stage 4												Amgan/Solvan	509
												Toyonian		Lenian †	510 *
												Botomian			512.5 *
		Stage 3										Botomian			514
		Stage 3										Atdabanian			515.6 *
	Terreneuvian	Stage 2										Tommotian			521
		Stage 2										Nemakit-Daldynian			525.5
		Fortunian										Nemakit-Daldynian		Manykaian †	529
																538.8