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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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				Obsolete Names for ICS Units			Cambrian of China		Cambrian of Kazakhstan	Ordovician of North America					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	Cincinnatian	Gamachian			Harju	Porkuni	443.8
		Katian		Rawtheyan		Gamachian				Pirgu	445.2
				Rawtheyan		Richmondian					446 *
				Cautleyan			448.9 *
				Pusgillian			449.3 *
			Caradoc	Streffordian			Onnian †			Vormsi	449.6 *
						Maysvillian				Vormsi	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
						Maysvillian				Nabala		Johvi †	450 *
						Edenian				Nabala			450.4 *
						Edenian			Viru	Rakvere			450.6 *
					Mohawkian	Chatfieldian							451.1 *
				Cheneyan									451.5 *
				Cheneyan						Oandu			452 *
				Burrellian						Oandu			452.7 *
		Sandbian								Keila		Idavere †	453
							Actonian †						453.2 *
						Turinian							453.7 *
										Haljala			453.9
							Marshbrookian †						Woolstonian †	454.2 *
							Longvillian †							455.2 *
										Kukruse				456.4 *
				Aurelucian										456.8 *
					Whiterockian						Canadian †			Chazyan †/Marmor	457 *
							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					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														467.3
			Arenig	Fennian												468.4 *
						Rangerian										469.1 *
						Rangerian		Billingen		469.3 *
	Early Ordovician	Floian			Ibexian	Blackhillsian				Jeffersonian †				Cassinian †		470
												Latorp †				470.1 *
				Whitlandian												471.1 *
								Hunneberg								473.7 *
						Tulean										473.9 *
				Moridunian												474.3 *
		Tremadocian	Tremadoc	Migneintian												Ungurian	477.7
				Migneintian		Stairsian											480.3 *
				Cressagian													480.8 *
								Varangu									481.3 *
						Skullrockian		Varangu						Demingian †			482 *
								Pakerort									482.2 *
																	485 *
Cambrian	Furongian	Stage 10								Niuchehean	Taoyuanian †	Batyrbaian						485.4
																		486.3 *
																		486.5
																		487.5
		Jiangshanian								Jiangshanian								489.5
												Aksaian						490.7 *
												Sakian						492.2 *
		Paibian								Paibian								494
		Paibian								Paibian	Waergangian †/Youshuanian							494.9 *
	Miaolingian	Guzhangian								Series 3 †	Guzhangian	Wangcunian †						Ayusokkanian	497
		Guzhangian									Guzhangian								499.5
		Drumian									Drumian							Zhanaarykian	500.5
		Drumian									Drumian							Tuesaian	503
		Wuliuan									Stage 5 †	Wuliuan/Taijangian						Tuesaian		504.5
		Wuliuan									Stage 5 †	Wuliuan/Taijangian								505.3
	Series 2	Stage 4										Duyunian								509
																		Toyonian		510 *
																		Botomian		512.5 *
		Stage 3										Nangaoian						Botomian		514
		Stage 3										Nangaoian						Atdabanian		515.6 *
	Terreneuvian	Stage 2										Meishucunian						Tommotian		521
		Stage 2																		525.5
		Fortunian																		529
		Fortunian										Jinnigian								530.7
																					538.8