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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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				Cambrian of Britain		Ordovician of the Baltic				Ten Million Year Bins	Cambrian Epochs
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													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													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	Ashgill	Hirnantian	Harju	Porkuni	Ordovician 5	443.8
		Katian		Rawtheyan		Pirgu		445.2
				Cautleyan				448.9 *
				Pusgillian				449.3 *
			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 †	Ordovician 4	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			Uhaku		Ordovician 3		458.4
							Lasnamagi				458.9 *
							Aseri				460.4 *
				Abereiddian/Early Llanvirn			Aseri				461.3 *
					Oeland		Kunda				462.9 *
							Kunda	Valaste †/Hunderum			464.3 *
							Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian							Ordovician 2			467.3
			Arenig	Fennian								468.4 *
							Billingen					469.3 *
	Early Ordovician	Floian										470
								Latorp †				470.1 *
				Whitlandian								471.1 *
				Whitlandian			Hunneberg					473.7 *
				Moridunian								474.3 *
		Tremadocian	Tremadoc	Migneintian					Ordovician 1			477.7
				Cressagian								480.8 *
							Varangu					481.3 *
							Pakerort					482.2 *
												485 *
Cambrian	Furongian	Stage 10						Merioneth	Dolgellian/Trempealeauan				Cambrian 5	Late Cambrian	485.4
															486.3 *
															486.5
									Festiniogian						489.2 *
		Jiangshanian							Festiniogian						489.5
		Jiangshanian							Maentwrogian						493.1 *
		Paibian							Maentwrogian						494
	Miaolingian	Guzhangian						St Davids					Cambrian 4	Middle Cambrian	497
		Drumian											Cambrian 4		500.5
		Wuliuan											Cambrian 3		504.5
	Series 2	Stage 4						Caerfai					Cambrian 3	Early Cambrian	509
	Series 2	Stage 3											Cambrian 2		514
	Terreneuvian	Stage 2											Cambrian 2		521
	Terreneuvian	Fortunian											Cambrian 1		529
															538.8