PBDB Timescale

Ordovician of Britain

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
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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are 14 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 4547 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of China			Cambrian of Australia	Ordovician of Australia	Obsolete Names for ICS Units			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	Ashgill	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Bolindian	Harju	Porkuni	443.8
		Katian		Rawtheyan	Chientangkiangian					Pirgu	445.2
				Cautleyan							448.9 *
				Cautleyan				Eastonian			449 *
				Pusgillian							449.3 *
				Pusgillian	Neichianshanian/Hanjiang						449.5
			Caradoc	Streffordian						Onnian †	Vormsi	449.6 *
											Nabala	Johvi †		450 *
									Viru		Rakvere			450.6 *
				Cheneyan							Rakvere			451.5 *
				Cheneyan				Gisbornian			Oandu			452 *
				Burrellian							Oandu			452.7 *
		Sandbian									Keila	Idavere †		453
										Actonian †	Keila			453.2 *
										Actonian †	Haljala			453.9
										Marshbrookian †				Woolstonian †	454.2 *
										Longvillian †					455.2 *
											Kukruse				456.4 *
				Aurelucian											456.8 *
										Soudleyan †/Harnagian/Costonian					457.4 *
										Soudleyan †/Harnagian/Costonian	Uhaku	Aluoja †			457.5 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn		Darriwilian		Guniu †/Hulo		Darriwilian	Uhaku				458.4
											Lasnamagi				458.9 *
											Aseri				460.4 *
				Abereiddian/Early Llanvirn							Aseri				461.3 *
									Oeland		Kunda				462.9 *
												Valaste †/Hunderum			464.3 *
							Hunjiang †	Dawan †/Daobaowan/Ningkuo							466.3 *
											Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian				Dapingian				Yapeenian						467.3
			Arenig	Fennian						Yapeenian						468.4 *
										Castlemainian						468.5 *
										Castlemainian	Billingen					469.3 *
	Early Ordovician	Floian				Yiyangian				Chewtonian						470
												Latorp †				470.1 *
				Whitlandian									471.1 *
										Bendigonian			471.8 *
										Lancefieldian			473.5 *
											Hunneberg		473.7 *
				Moridunian									474.3 *
		Tremadocian	Tremadoc	Migneintian		Xinchangian							477.7
				Migneintian				Lianghekou †					477.9 *
				Cressagian									480.8 *
											Varangu		481.3 *
											Pakerort		482.2 *
										Warendian			482.8 *
										Warendian			485 *
Cambrian	Furongian	Stage 10								Datsonian						485.4
																486.3 *
																486.5
										Payntonian						486.8 *
		Jiangshanian								Iverian						489.5
		Paibian								Idamean						494
	Miaolingian	Guzhangian								Mindyallan						Series 3 †	497
		Guzhangian								Boomerangian							499
		Drumian								Undillan							500.5
		Drumian								Floran							503
		Wuliuan								Templetonian							Stage 5 †	504.5
		Wuliuan								Ordian							Stage 5 †	507.8 *
	Series 2	Stage 4								Ordian								509
																			510.8 *