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
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
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 Ibero-Bohemia				Cambrian of Siberia			Ordovician of Australia	Obsolete Names for ICS Units
Quaternary	Holocene	Meghalayan																			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																			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	Kosovian	Bolindian	Harju	Porkuni	443.8
		Katian		Rawtheyan	Kralodvorian			Bohdalec †	Pirgu	445.2
				Cautleyan						448.9 *
				Cautleyan		Eastonian				449 *
				Pusgillian						449.3 *
			Caradoc	Streffordian					Onnian †	Vormsi	449.6 *
					Berounian					Vormsi	449.7 *
										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 *
													Zahorany †/Vinice	Letna †	456.2 *
										Kukruse					456.4 *
				Aurelucian											456.8 *
									Soudleyan †/Harnagian/Costonian						457.4 *
										Uhaku	Aluoja †				457.5 *
								Liben †							458 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn					Darriwilian						458.4
					Dobrotivian										458.5 *
					Dobrotivian					Lasnamagi					458.9 *
					Oretanian					Lasnamagi					459.7 *
										Aseri					460.4 *
				Abereiddian/Early Llanvirn											461.3 *
								Sarka †							461.7 *
							Oeland			Kunda					462.9 *
										Kunda	Valaste †/Hunderum				464.3 *
										Volkhov					Langevoja †/Vaana/Saka		467.1 *
		Dapingian						Klabava †	Yapeenian								467.3
					Arenigian												468
			Arenig	Fennian												468.4 *
									Castlemainian							468.5 *
									Castlemainian	Billingen						469.3 *
	Early Ordovician	Floian							Chewtonian							470
											Latorp †					470.1 *
				Whitlandian												471.1 *
									Bendigonian							471.8 *
									Lancefieldian							473.5 *
										Hunneberg						473.7 *
				Moridunian												474.3 *
		Tremadocian	Tremadoc	Migneintian	Tremadocian											477.7
				Cressagian												480.8 *
										Varangu						481.3 *
										Pakerort						482.2 *
									Warendian							482.8 *
																Mansian †	483.55 *
																Mansian †	485 *
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							Ayusokkanian									Series 3 †	497
		Guzhangian							Mayan/Menevian										499.5
		Drumian							Mayan/Menevian										500.5
		Wuliuan							Amgan/Solvan										Stage 5 †	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