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
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
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				Cambrian of Australia	Ordovician of North America						Ordovician of Australia	Obsolete Names for ICS Units			Ordovician of the Baltic
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	Cincinnatian	Gamachian	Bolindian	Harju	Porkuni	443.8
		Katian		Rawtheyan		Gamachian			Pirgu	445.2
				Rawtheyan		Richmondian				446 *
				Cautleyan						448.9 *
				Cautleyan			Eastonian			449 *
				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			Gisbornian			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					Darriwilian	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							Yapeenian								467.3
			Arenig	Fennian					Yapeenian								468.4 *
									Castlemainian							468.5 *
						Rangerian										469.1 *
						Rangerian				Billingen						469.3 *
	Early Ordovician	Floian			Ibexian	Blackhillsian			Jeffersonian †					Cassinian †		Chewtonian	470
												Latorp †					470.1 *
				Whitlandian													471.1 *
																Bendigonian	471.8 *
																Lancefieldian	473.5 *
										Hunneberg							473.7 *
						Tulean											473.9 *
				Moridunian													474.3 *
		Tremadocian	Tremadoc	Migneintian													477.7
				Migneintian		Stairsian											480.3 *
				Cressagian													480.8 *
										Varangu							481.3 *
						Skullrockian				Varangu				Demingian †			482 *
										Pakerort							482.2 *
																Warendian	482.8 *
																Warendian	485 *
Cambrian	Furongian	Stage 10							Datsonian									485.4
																		486.3 *
																		486.5
									Payntonian									486.8 *
									Payntonian									487.5
		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
		Stage 4																		510.8 *
		Stage 3																		514
	Terreneuvian	Stage 2																		521
	Terreneuvian	Fortunian																		529
																					538.8