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
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
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

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 North America						Ordovician of the Baltic				Cambrian of Australia	Cambrian of Britain		Cambrian of West Avalonia
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	Cincinnatian	Gamachian	Harju	Porkuni	443.8
		Katian		Gamachian		Pirgu	445.2
				Richmondian		Pirgu	446 *
				Richmondian		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		Rakvere			451.1 *
						Oandu			452 *
		Sandbian				Keila		Idavere †	453
				Turinian		Keila			453.7 *
						Haljala			453.9
						Kukruse			456.4 *
			Whiterockian			Kukruse	Canadian †		Chazyan †/Marmor	457 *
						Uhaku		Aluoja †		457.5 *
	Middle Ordovician	Darriwilian				Uhaku				458.4
						Lasnamagi				458.9 *
						Aseri				460.4 *
					Oeland	Kunda				462.9 *
						Kunda		Valaste †/Hunderum		464.3 *
						Volkhov				Langevoja †/Vaana/Saka	467.1 *
		Dapingian									467.3
				Rangerian							469.1 *
				Rangerian		Billingen					469.3 *
	Early Ordovician	Floian	Ibexian	Blackhillsian					Jeffersonian †		Cassinian †	470
								Latorp †				470.1 *
						Hunneberg						473.7 *
				Tulean								473.9 *
		Tremadocian		Tulean								477.7
				Stairsian								480.3 *
				Stairsian		Varangu						481.3 *
				Skullrockian		Varangu					Demingian †	482 *
						Pakerort					Demingian †	482.2 *
Cambrian	Furongian	Stage 10				Pakerort	Late Cambrian						Datsonian	Merioneth	Dolgellian/Trempealeauan	485.4
																486.3 *
																486.5
													Payntonian			486.8 *
																487.5
															Festiniogian	489.2 *
		Jiangshanian											Iverian		Festiniogian	489.5
		Jiangshanian											Iverian		Maentwrogian	493.1 *
		Paibian											Idamean		Maentwrogian	494
	Miaolingian	Guzhangian					Middle Cambrian						Mindyallan	St Davids		497
													Mindyallan			Arcadian	498.4
													Boomerangian				499
		Drumian											Undillan				500.5
		Drumian											Floran				503
		Wuliuan											Templetonian				504.5
		Wuliuan											Ordian				507.8 *
	Series 2	Stage 4					Early Cambrian						Ordian	Caerfai		Branchian	509
		Stage 4															510.8 *
		Stage 3															514
		Stage 3														Placentian	517.1
	Terreneuvian	Stage 2															521
	Terreneuvian	Fortunian															529
																		538.8