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
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 Epochs	Ordovician of China			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	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Kosovian	Harju	Porkuni	443.8
		Katian		Rawtheyan	Chientangkiangian			Kralodvorian		Bohdalec †	Pirgu	445.2
				Cautleyan								448.9 *
				Pusgillian								449.3 *
				Pusgillian	Neichianshanian/Hanjiang							449.5
			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		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				Dapingian				Klabava †									467.3
								Arenigian								468
			Arenig	Fennian												468.4 *
												Billingen				469.3 *
	Early Ordovician	Floian				Yiyangian										470
													Latorp †					470.1 *
				Whitlandian														471.1 *
				Whitlandian								Hunneberg						473.7 *
				Moridunian														474.3 *
		Tremadocian	Tremadoc	Migneintian		Xinchangian		Tremadocian										477.7
				Migneintian							Lianghekou †							477.9 *
				Cressagian														480.8 *
												Varangu						481.3 *
												Pakerort						482.2 *
																		485 *
Cambrian	Furongian	Stage 10				Late Cambrian													485.4
																			486.3 *
																			486.5
		Jiangshanian																	489.5
		Paibian																	494
	Miaolingian	Guzhangian				Middle Cambrian													Series 3 †	497
		Drumian																		500.5
		Wuliuan																		Stage 5 †	504.5
	Series 2	Stage 4				Early Cambrian															509
	Series 2	Stage 3																			514
	Terreneuvian	Stage 2																			521
	Terreneuvian	Fortunian																			529
																						538.8