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
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 4548 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of Ibero-Bohemia				Cambrian of Siberia			Obsolete Names for ICS Units			Ordovician of China			Cambrian of Britain		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	Kosovian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian		Rawtheyan	Kralodvorian	Bohdalec †				Gamachian		Chientangkiangian	Pirgu			445.2
				Rawtheyan						Richmondian						446 *
				Cautleyan										448.9 *
				Pusgillian										449.3 *
				Pusgillian				Neichianshanian/Hanjiang						449.5
			Caradoc	Streffordian									Onnian †	Vormsi		449.6 *
					Berounian											449.7 *
										Maysvillian						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 *
																			Zahorany †/Vinice	Letna †	456.2 *
														Kukruse							456.4 *
				Aurelucian																	456.8 *
									Whiterockian							Canadian †					Chazyan †/Marmor	457 *
													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					Guniu †/Hulo									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 *
																	Valaste †/Hunderum			464.3 *
												Hunjiang †	Dawan †/Daobaowan/Ningkuo							466.3 *
														Volkhov						Langevoja †/Vaana/Saka		467.1 *
		Dapingian				Klabava †		Dapingian														467.3
					Arenigian																	468
			Arenig	Fennian																		468.4 *
										Rangerian												469.1 *
										Rangerian				Billingen								469.3 *
	Early Ordovician	Floian						Yiyangian	Ibexian	Blackhillsian											Jeffersonian †	Cassinian †	470
																	Latorp †						470.1 *
				Whitlandian																			471.1 *
														Hunneberg									473.7 *
										Tulean													473.9 *
				Moridunian																			474.3 *
		Tremadocian	Tremadoc	Migneintian	Tremadocian			Xinchangian															Ungurian	477.7
													Lianghekou †											477.9 *
										Stairsian														480.3 *
				Cressagian																				480.8 *
														Varangu										481.3 *
										Skullrockian				Varangu								Demingian †		482 *
														Pakerort										482.2 *
																								Mansian †	483.55 *
																								Mansian †	485 *
Cambrian	Furongian	Stage 10						Batyrbaian				Tavgian †	Ketyan †/Yurakian									Merioneth	Dolgellian/Trempealeauan	Batyrbaian		485.4
																										486.3 *
																										486.5
																										487.5
																							Festiniogian			489.2 *
		Jiangshanian																								489.5
								Aksaian																Aksaian		490.7 *
								Sakian																Sakian		492.2 *
																							Maentwrogian			493.1 *
		Paibian																								494
		Paibian											Ensyan †/Maduan/Nganasanian													494.7 *
	Miaolingian	Guzhangian						Ayusokkanian														Series 3 †	St Davids			Ayusokkanian	497
		Guzhangian						Mayan/Menevian																			499.5
		Drumian																								Zhanaarykian	500.5
		Drumian																								Tuesaian	503
		Wuliuan						Amgan/Solvan																		Tuesaian	Stage 5 †	504.5
		Wuliuan																									Stage 5 †	505.3
	Series 2	Stage 4																									Caerfai	509
								Toyonian				Lenian †														Toyonian		510 *
								Botomian																		Botomian		512.5 *
		Stage 3						Botomian																		Botomian		514
		Stage 3						Atdabanian																		Atdabanian		515.6 *
	Terreneuvian	Stage 2						Tommotian																		Tommotian		521
		Stage 2						Nemakit-Daldynian																				525.5
		Fortunian						Nemakit-Daldynian				Manykaian †																529
																													538.8