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

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 Kazakhstan	Ordovician of China			Cambrian 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	Hirnantian	Xiaoxita †/Shikou	Wufeng †	Ordovician 5	443.8
		Katian		Rawtheyan	Chientangkiangian				445.2
				Cautleyan					448.9 *
				Pusgillian					449.3 *
				Pusgillian	Neichianshanian/Hanjiang				449.5
			Caradoc	Streffordian					Onnian †	449.6 *
				Cheneyan						451.5 *
				Burrellian						452.7 *
		Sandbian						Ordovician 4		453
									Actonian †	453.2 *
									Marshbrookian †	Woolstonian †	454.2 *
									Longvillian †		455.2 *
				Aurelucian					Longvillian †		456.8 *
				Aurelucian					Soudleyan †/Harnagian/Costonian		457.4 *
	Middle Ordovician	Darriwilian	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn		Darriwilian		Guniu †/Hulo	Ordovician 3		458.4
				Abereiddian/Early Llanvirn				Guniu †/Hulo			461.3 *
							Hunjiang †	Dawan †/Daobaowan/Ningkuo			466.3 *
		Dapingian				Dapingian			Ordovician 2		467.3
		Dapingian	Arenig	Fennian		Dapingian					468.4 *
	Early Ordovician	Floian		Fennian		Yiyangian					470
				Whitlandian							471.1 *
				Moridunian							474.3 *
		Tremadocian	Tremadoc	Migneintian		Ungurian			Xinchangian		Ordovician 1	477.7
				Migneintian				Lianghekou †				477.9 *
				Cressagian								480.8 *
				Cressagian								Mansian †	483.55 *
												Mansian †	485 *
Cambrian	Furongian	Stage 10				Batyrbaian	Tavgian †	Ketyan †/Yurakian	Batyrbaian					Datsonian	Cambrian 5	Late Cambrian	485.4
		Stage 10												Payntonian			486.8 *
		Jiangshanian												Iverian			489.5
						Aksaian			Aksaian								490.7 *
						Sakian			Sakian								492.2 *
		Paibian												Idamean			494
		Paibian						Ensyan †/Maduan/Nganasanian						Idamean			494.7 *
	Miaolingian	Guzhangian				Ayusokkanian			Ayusokkanian					Mindyallan	Cambrian 4	Middle Cambrian	497
						Ayusokkanian			Ayusokkanian					Boomerangian			499
						Mayan/Menevian								Boomerangian			499.5
		Drumian							Zhanaarykian					Undillan			500.5
		Drumian							Tuesaian					Floran			503
		Wuliuan				Amgan/Solvan			Tuesaian					Templetonian	Cambrian 3		504.5
														Templetonian			505.3
														Ordian			507.8 *
	Series 2	Stage 4														Early Cambrian	509
						Toyonian	Lenian †		Toyonian								510 *
						Toyonian			Toyonian								510.8 *
						Botomian			Botomian								512.5 *
		Stage 3				Botomian			Botomian						Cambrian 2		514
		Stage 3				Atdabanian			Atdabanian								515.6 *
	Terreneuvian	Stage 2				Tommotian			Tommotian								521
		Stage 2				Nemakit-Daldynian											525.5
		Fortunian				Nemakit-Daldynian	Manykaian †								Cambrian 1		529
																	538.8