PBDB Timescale

Cambrian of Britain

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

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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view
F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 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 602 collections

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International Chronostratigraphic Timescale			Cambrian of Britain		Obsolete Names for ICS Units			Ordovician of the Baltic				Cambrian of Kazakhstan
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			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			443.8
		Katian		Pirgu			445.2
				Vormsi			449.6 *
				Nabala	Johvi †		450 *
			Viru	Rakvere			450.6 *
				Oandu			452 *
		Sandbian		Keila	Idavere †		453
				Haljala			453.9
				Kukruse			456.4 *
				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		Volkhov				467.3
		Dapingian		Billingen				469.3 *
	Early Ordovician	Floian						470
					Latorp †			470.1 *
				Hunneberg				473.7 *
		Tremadocian		Hunneberg				Ungurian	477.7
				Varangu					481.3 *
				Pakerort					482.2 *
Cambrian	Furongian	Stage 10		Pakerort	Merioneth			Dolgellian/Trempealeauan		Batyrbaian	485.4
											486.3 *
											486.5
								Festiniogian			489.2 *
		Jiangshanian									489.5
										Aksaian	490.7 *
										Sakian	492.2 *
								Maentwrogian			493.1 *
		Paibian						Maentwrogian			494
	Miaolingian	Guzhangian			St Davids					Series 3 †	Ayusokkanian	497
		Guzhangian										499.5
		Drumian				Zhanaarykian					500.5
		Drumian				Tuesaian					503
		Wuliuan				Tuesaian					Stage 5 †	504.5
		Wuliuan									Stage 5 †	505.3
	Series 2	Stage 4			Caerfai							509
						Toyonian						510 *
						Botomian						512.5 *
		Stage 3				Botomian						514
		Stage 3				Atdabanian						515.6 *
	Terreneuvian	Stage 2				Tommotian						521
		Stage 2										525.5
		Fortunian										529
													538.8