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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of Australia	Ordovician of China			Obsolete Names for ICS Units			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	Bolindian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Cincinnatian	Gamachian			Harju	Porkuni	443.8
		Katian		Rawtheyan		Chientangkiangian				Gamachian				Pirgu	445.2
				Rawtheyan						Richmondian					446 *
				Cautleyan							448.9 *
				Cautleyan	Eastonian						449 *
				Pusgillian							449.3 *
				Pusgillian		Neichianshanian/Hanjiang					449.5
			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	Darriwilian				Guniu †/Hulo			Uhaku					458.4
														Lasnamagi					458.9 *
														Aseri					460.4 *
				Abereiddian/Early Llanvirn										Aseri					461.3 *
													Oeland	Kunda					462.9 *
																Valaste †/Hunderum			464.3 *
								Hunjiang †			Dawan †/Daobaowan/Ningkuo								466.3 *
														Volkhov					Langevoja †/Vaana/Saka	467.1 *
		Dapingian				Yapeenian	Dapingian					467.3
			Arenig	Fennian		Yapeenian						468.4 *
						Castlemainian						468.5 *
										Rangerian		469.1 *
										Rangerian		Billingen		469.3 *
	Early Ordovician	Floian				Chewtonian	Yiyangian		Ibexian	Blackhillsian				Jeffersonian †				Cassinian †		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			Xinchangian													477.7
											Lianghekou †									477.9 *
										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																		Late Cambrian	485.4
																					486.3 *
																					486.5
																					487.5
		Jiangshanian																			489.5
		Paibian																			494
	Miaolingian	Guzhangian																		Series 3 †	Middle Cambrian	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