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
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

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International Chronostratigraphic Timescale			Ordovician of Britain				Ordovician of North America						Ordovician of China			Ordovician of Australia	Ten Million Year Bins	Cambrian Epochs
Quaternary	Holocene	Meghalayan															Cenozoic 6		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															Cenozoic 5		11.63
		Langhian																	13.82
		Burdigalian																	15.98
		Aquitanian																	20.44
Paleogene	Oligocene	Chattian															Cenozoic 4		23.03
	Oligocene	Rupelian															Cenozoic 4		27.82
	Eocene	Priabonian															Cenozoic 3		33.9
		Bartonian															Cenozoic 3		37.71
		Lutetian															Cenozoic 2		41.2
		Ypresian															Cenozoic 2		47.8
	Paleocene	Thanetian															Cenozoic 1		56
		Selandian																	59.2
		Danian																	61.6
Cretaceous	Late Cretaceous	Maastrichtian															Cretaceous 8		66
		Campanian															Cretaceous 7		72.1
		Santonian															Cretaceous 6		83.6
		Coniacian																	86.3
		Turonian																	89.8
		Cenomanian															Cretaceous 5		93.9
	Early Cretaceous	Albian															Cretaceous 4		100.5
		Aptian															Cretaceous 3		113
		Barremian															Cretaceous 2		121.4
		Hauterivian															Cretaceous 2		125.77
		Valanginian															Cretaceous 1		132.6
		Berriasian															Cretaceous 1		139.8
Jurassic	Late Jurassic	Tithonian															Jurassic 6		145
		Kimmeridgian															Jurassic 5		149.2
		Oxfordian																	154.8
	Middle Jurassic	Callovian																	161.5
		Bathonian															Jurassic 4		165.3
		Bajocian															Jurassic 4		168.2
		Aalenian															Jurassic 3		170.9
	Early Jurassic	Toarcian															Jurassic 3		174.7
		Pliensbachian															Jurassic 2		184.2
		Sinemurian															Jurassic 1		192.9
		Hettangian															Jurassic 1		199.5
Triassic	Late Triassic	Rhaetian															Triassic 4		201.4
		Norian															Triassic 4		208.5
		Carnian															Triassic 3		227
	Middle Triassic	Ladinian															Triassic 2		237
	Middle Triassic	Anisian															Triassic 2		242
	Early Triassic	Olenekian															Triassic 1		247.2
	Early Triassic	Induan															Triassic 1		251.2
Permian	Lopingian	Changhsingian															Permian 4		251.902
	Lopingian	Wuchiapingian																	254.14
	Guadalupian	Capitanian																	259.51
		Wordian																	264.28
		Roadian															Permian 3		266.9
	Cisuralian	Kungurian															Permian 2		273.01
		Artinskian																	283.5
		Sakmarian																	290.1
		Asselian															Permian 1		293.52
Carboniferous	Pennsylvanian	Gzhelian															Carboniferous 5		298.9
		Kasimovian	303.7														Carboniferous 5
		Moscovian	Carboniferous 4	307
		Bashkirian	Carboniferous 4	315.2
	Mississippian	Serpukhovian	Carboniferous 3	323.2
		Visean	Carboniferous 2	330.9
		Tournaisian	Carboniferous 1	346.7
Devonian	Late Devonian	Famennian	Devonian 5	358.9
	Late Devonian	Frasnian	Devonian 4	372.2
	Middle Devonian	Givetian	Devonian 3	382.7
	Middle Devonian	Eifelian	Devonian 3	387.7
	Early Devonian	Emsian	Devonian 2	393.3
		Pragian	Devonian 1	407.6
		Lochkovian	Devonian 1	410.8
Silurian	Pridoli		Silurian 2	419.2
	Ludlow	Ludfordian		423
	Ludlow	Gorstian		425.6
	Wenlock	Homerian		427.4
	Wenlock	Sheinwoodian		430.5
	Llandovery	Telychian	Silurian 1	433.4
		Aeronian		438.5
		Rhuddanian		440.8
Ordovician	Late Ordovician	Hirnantian	Ashgill	Hirnantian	Cincinnatian	Gamachian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Bolindian	Ordovician 5	443.8
		Katian		Rawtheyan		Gamachian	Chientangkiangian					445.2
				Rawtheyan		Richmondian						446 *
				Cautleyan								448.9 *
				Cautleyan						Eastonian		449 *
				Pusgillian								449.3 *
				Pusgillian			Neichianshanian/Hanjiang					449.5
			Caradoc	Streffordian								Onnian †	449.6 *
						Maysvillian							Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
						Edenian								450.4 *
					Mohawkian	Chatfieldian								451.1 *
				Cheneyan										451.5 *
				Cheneyan						Gisbornian				452 *
				Burrellian										452.7 *
		Sandbian									Ordovician 4			453
												Actonian †		453.2 *
						Turinian						Actonian †		453.7 *
												Marshbrookian †		Woolstonian †	454.2 *
												Longvillian †			455.2 *
				Aurelucian											456.8 *
					Whiterockian								Canadian †		Chazyan †/Marmor	457 *
												Soudleyan †/Harnagian/Costonian				457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				Darriwilian		Guniu †/Hulo	Darriwilian	Ordovician 3				458.4
				Abereiddian/Early Llanvirn						Guniu †/Hulo						461.3 *
									Hunjiang †	Dawan †/Daobaowan/Ningkuo						466.3 *
		Dapingian						Dapingian			Yapeenian	Ordovician 2				467.3
			Arenig	Fennian							Yapeenian					468.4 *
											Castlemainian					468.5 *
						Rangerian					Castlemainian					469.1 *
	Early Ordovician	Floian			Ibexian	Blackhillsian		Jeffersonian †			Cassinian †				Yiyangian	Chewtonian	470
				Whitlandian												Chewtonian	471.1 *
																Bendigonian	471.8 *
																Lancefieldian	473.5 *
						Tulean											473.9 *
				Moridunian													474.3 *
		Tremadocian	Tremadoc	Migneintian								Xinchangian			Ordovician 1		477.7
										Lianghekou †							477.9 *
						Stairsian											480.3 *
				Cressagian		Stairsian											480.8 *
						Skullrockian					Demingian †						482 *
																Warendian	482.8 *
																Warendian	485 *
Cambrian	Furongian	Stage 10														Cambrian 5	Late Cambrian	485.4
		Stage 10																487.5
		Jiangshanian																489.5
		Paibian																494
	Miaolingian	Guzhangian														Cambrian 4	Middle Cambrian	497
		Drumian														Cambrian 4		500.5
		Wuliuan														Cambrian 3		504.5
	Series 2	Stage 4														Cambrian 3	Early Cambrian	509
	Series 2	Stage 3														Cambrian 2		514
	Terreneuvian	Stage 2														Cambrian 2		521
	Terreneuvian	Fortunian														Cambrian 1		529
																			538.8