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 4546 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of China			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 †	Harju	Porkuni			443.8
		Katian		Rawtheyan	Chientangkiangian				Pirgu			445.2
				Cautleyan								448.9 *
				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						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	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									467.3
			Arenig	Fennian											468.4 *
										Billingen					469.3 *
	Early Ordovician	Floian				Yiyangian									470
												Latorp †			470.1 *
				Whitlandian											471.1 *
				Whitlandian						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 *
											485 *
Cambrian	Furongian	Stage 10										485.4
												486.3 *
												486.5
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian										Series 3 †			497
		Drumian													500.5
		Wuliuan													Stage 5 †	504.5
																	509