PBDB Timescale

Cambrian Epochs

The interval definitions in this timescale are derived from the following sources:

F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
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
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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are 12 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 594 collections

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International Chronostratigraphic Timescale			Cambrian Epochs	Cambrian of China		Ordovician of Britain				Cambrian of Britain		Cambrian of Siberia			Ordovician of the Baltic				Cambrian of Australia			Obsolete Names for ICS Units
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	Harju	Porkuni	Cincinnatian	Gamachian	443.8
		Katian		Rawtheyan		Pirgu		Gamachian	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 *
					Viru			Edenian	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								Late Cambrian	Niuchehean		Taoyuanian †		Merioneth	Dolgellian/Trempealeauan	Batyrbaian	Tavgian †	Ketyan †/Yurakian	Datsonian	485.4
																					486.3 *
																					486.5
																				Payntonian	486.8 *
																					487.5
																Festiniogian					489.2 *
		Jiangshanian									Jiangshanian									Iverian	489.5
																	Aksaian				490.7 *
																	Sakian				492.2 *
																Maentwrogian					493.1 *
		Paibian									Paibian									Idamean	494
																			Ensyan †/Maduan/Nganasanian		494.7 *
													Waergangian †/Youshuanian						Ensyan †/Maduan/Nganasanian		494.9 *
	Miaolingian	Guzhangian								Middle Cambrian	Guzhangian		Wangcunian †		St Davids		Ayusokkanian			Mindyallan	Series 3 †	497
																	Ayusokkanian			Boomerangian		499
																	Mayan/Menevian			Boomerangian		499.5
		Drumian									Drumian									Undillan		500.5
		Drumian									Drumian									Floran		503
		Wuliuan									Wuliuan/Taijangian						Amgan/Solvan			Templetonian		Stage 5 †	504.5
		Wuliuan									Wuliuan/Taijangian									Ordian		Stage 5 †	507.8 *
	Series 2	Stage 4								Early Cambrian	Duyunian				Caerfai								509
																	Toyonian	Lenian †					510 *
																	Toyonian						510.8 *
																	Botomian						512.5 *
		Stage 3									Nangaoian						Botomian						514
		Stage 3									Nangaoian						Atdabanian						515.6 *
	Terreneuvian	Stage 2									Meishucunian						Tommotian						521
		Stage 2															Nemakit-Daldynian						525.5
		Fortunian																Manykaian †					529
		Fortunian									Jinnigian							Manykaian †					530.7
																								538.8