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

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				Cambrian of Britain		Cambrian of North America		Cambrian of China		Cambrian of West Avalonia	Ten Million Year Bins
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	Harju	Porkuni	Ordovician 5	443.8
		Katian		Pirgu		445.2
				Vormsi		449.6 *
				Nabala		Johvi †	450 *
			Viru	Rakvere			450.6 *
				Oandu			452 *
		Sandbian		Keila	Idavere †	Ordovician 4	453
				Haljala			453.9
				Kukruse			456.4 *
				Uhaku	Aluoja †		457.5 *
	Middle Ordovician	Darriwilian		Uhaku		Ordovician 3	458.4
				Lasnamagi			458.9 *
				Aseri			460.4 *
			Oeland	Kunda			462.9 *
				Kunda	Valaste †/Hunderum		464.3 *
				Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian		Volkhov		Ordovician 2		467.3
		Dapingian		Billingen				469.3 *
	Early Ordovician	Floian						470
					Latorp †			470.1 *
				Hunneberg				473.7 *
		Tremadocian		Hunneberg		Ordovician 1		477.7
				Varangu				481.3 *
				Pakerort				482.2 *
Cambrian	Furongian	Stage 10		Pakerort	Late Cambrian			Merioneth	Dolgellian/Trempealeauan	Franconian †/Dresbachian/Millardan	Niuchehean	Taoyuanian †	Cambrian 5	485.4
														486.3 *
														486.5
														Sunwaptan	487.5
									Festiniogian						489.2 *
		Jiangshanian									Jiangshanian				489.5
														Steptoean	493 *
									Maentwrogian						493.1 *
		Paibian									Paibian				494
		Paibian									Paibian	Waergangian †/Youshuanian			494.9 *
	Miaolingian	Guzhangian			Middle Cambrian			St Davids		Marjumian	Albertian †	Guzhangian	Wangcunian †	Cambrian 4	497
		Guzhangian										Guzhangian			Arcadian	498.4
		Drumian										Drumian				500.5
		Wuliuan								Topazan		Wuliuan/Taijangian		Cambrian 3		504.5
		Wuliuan								Delamaran		Wuliuan/Taijangian				506.5
	Series 2	Stage 4			Early Cambrian			Caerfai		Delamaran	Waucoban †	Duyunian			Branchian	509
		Stage 4								Dyeran		Duyunian				511 *
		Stage 3								Dyeran		Nangaoian		Cambrian 2		514
										Montezuman						514.8 *
										Montezuman					Placentian	517.1
										Begadean						519.9 *
	Terreneuvian	Stage 2										Meishucunian				521
		Fortunian										Meishucunian		Cambrian 1		529
		Fortunian										Jinnigian		Cambrian 1		530.7
																538.8