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
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	Ordovician of the Baltic				Ordovician of Britain				Cambrian of China		Cambrian of West Avalonia	Cambrian of Kazakhstan	Cambrian of Australia	Cambrian of Britain		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	Harju	Porkuni	Ashgill	Hirnantian	443.8
		Katian		Pirgu		Rawtheyan	445.2
						Cautleyan	448.9 *
						Pusgillian	449.3 *
				Vormsi	Caradoc	Streffordian	Onnian †	449.6 *
				Nabala				Johvi †	450 *
			Viru	Rakvere					450.6 *
				Rakvere		Cheneyan			451.5 *
				Oandu		Cheneyan			452 *
				Oandu		Burrellian			452.7 *
		Sandbian		Keila				Idavere †	453
				Keila			Actonian †		453.2 *
				Haljala			Actonian †		453.9
							Marshbrookian †		Woolstonian †	454.2 *
							Longvillian †			455.2 *
				Kukruse						456.4 *
						Aurelucian				456.8 *
							Soudleyan †/Harnagian/Costonian			457.4 *
				Uhaku			Soudleyan †/Harnagian/Costonian	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Uhaku	Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn				458.4
				Lasnamagi						458.9 *
				Aseri						460.4 *
				Aseri		Abereiddian/Early Llanvirn				461.3 *
			Oeland	Kunda						462.9 *
				Kunda				Valaste †/Hunderum		464.3 *
				Volkhov						Langevoja †/Vaana/Saka	467.1 *
		Dapingian									467.3
					Arenig	Fennian					468.4 *
				Billingen							469.3 *
	Early Ordovician	Floian									470
								Latorp †			470.1 *
						Whitlandian					471.1 *
				Hunneberg		Whitlandian					473.7 *
						Moridunian					474.3 *
		Tremadocian			Tremadoc	Migneintian					Ungurian	477.7
						Cressagian						480.8 *
				Varangu								481.3 *
				Pakerort								482.2 *
												485 *
Cambrian	Furongian	Stage 10						Late Cambrian				Niuchehean	Taoyuanian †	Batyrbaian	Datsonian	Merioneth	Dolgellian/Trempealeauan	485.4
																		486.3 *
																		486.5
															Payntonian			486.8 *
															Payntonian		Festiniogian	489.2 *
		Jiangshanian										Jiangshanian			Iverian			489.5
														Aksaian				490.7 *
														Sakian				492.2 *
																	Maentwrogian	493.1 *
		Paibian										Paibian			Idamean			494
		Paibian										Paibian	Waergangian †/Youshuanian		Idamean			494.9 *
	Miaolingian	Guzhangian						Middle Cambrian				Guzhangian	Wangcunian †	Ayusokkanian	Mindyallan	St Davids		Series 3 †	497
															Mindyallan				Arcadian	498.4
															Boomerangian					499
															Boomerangian					499.5
		Drumian										Drumian		Zhanaarykian	Undillan					500.5
		Drumian										Drumian		Tuesaian	Floran					503
		Wuliuan										Wuliuan/Taijangian		Tuesaian	Templetonian					Stage 5 †	504.5
															Templetonian						505.3
															Ordian						507.8 *
	Series 2	Stage 4						Early Cambrian				Duyunian				Branchian		Caerfai			509
														Toyonian							510 *
														Toyonian							510.8 *
														Botomian							512.5 *
		Stage 3										Nangaoian		Botomian							514
														Atdabanian							515.6 *
														Atdabanian		Placentian					517.1
	Terreneuvian	Stage 2										Meishucunian		Tommotian							521
		Stage 2																			525.5
		Fortunian																			529
		Fortunian										Jinnigian									530.7
																						538.8