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

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 4546 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of Ibero-Bohemia				Obsolete Names for ICS Units			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	Harju	Porkuni	443.8
		Katian		Rawtheyan	Kralodvorian		Bohdalec †	Pirgu	445.2
				Cautleyan					448.9 *
				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					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											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 †									467.3
					Arenigian											468
			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	Tremadocian										477.7
				Cressagian											480.8 *
									Varangu						481.3 *
									Pakerort						482.2 *
															485 *
Cambrian	Furongian	Stage 10													485.4
															486.3 *
															486.5
		Jiangshanian													489.5
		Paibian													494
	Miaolingian	Guzhangian													Series 3 †	497
		Drumian														500.5
		Wuliuan														Stage 5 †	504.5
																		509