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
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 4547 collections

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International Chronostratigraphic Timescale			Ordovician of Britain				Cambrian of Siberia			Cambrian of China		Cambrian Epochs	Ordovician of North America
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																	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																	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	Harju	Porkuni	443.8
		Katian		Rawtheyan		Gamachian		Pirgu	445.2
				Rawtheyan		Richmondian			446 *
				Cautleyan					448.9 *
				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					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					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													467.3
			Arenig	Fennian											468.4 *
						Rangerian									469.1 *
						Rangerian			Billingen						469.3 *
	Early Ordovician	Floian			Ibexian	Blackhillsian							Jeffersonian †		Cassinian †	470
											Latorp †					470.1 *
				Whitlandian												471.1 *
									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 *
																Mansian †	483.55 *
																Mansian †	485 *
Cambrian	Furongian	Stage 10								Batyrbaian	Tavgian †		Ketyan †/Yurakian		Niuchehean	Taoyuanian †	Late Cambrian	485.4
																		486.3 *
																		486.5
																		487.5
		Jiangshanian													Jiangshanian			489.5
										Aksaian								490.7 *
										Sakian								492.2 *
		Paibian													Paibian			494
													Ensyan †/Maduan/Nganasanian					494.7 *
													Ensyan †/Maduan/Nganasanian			Waergangian †/Youshuanian		494.9 *
	Miaolingian	Guzhangian								Ayusokkanian					Guzhangian	Wangcunian †	Middle Cambrian	497
		Guzhangian								Mayan/Menevian					Guzhangian			499.5
		Drumian								Mayan/Menevian					Drumian			500.5
		Wuliuan								Amgan/Solvan					Wuliuan/Taijangian			504.5
	Series 2	Stage 4								Amgan/Solvan					Duyunian		Early Cambrian	509
										Toyonian	Lenian †							510 *
										Botomian								512.5 *
		Stage 3								Botomian					Nangaoian			514
		Stage 3								Atdabanian					Nangaoian			515.6 *
	Terreneuvian	Stage 2								Tommotian					Meishucunian			521
		Stage 2								Nemakit-Daldynian								525.5
		Fortunian									Manykaian †							529
		Fortunian									Manykaian †				Jinnigian			530.7
																			538.8