PBDB Interval

International Chronostratigraphic Timescale

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

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
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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 59 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 126700 collections

Show less time

Show linear time

International Chronostratigraphic Timescale			Permian of the Russian Platform		Silurian of the Baltic	Obsolete Names for ICS Units			Ordovician of the Baltic				Carboniferous Subepochs	Ordovician of Ibero-Bohemia
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
		Wuchiapingian					Longtanian †									254.14
		Wuchiapingian	Tatarian	Vyatkian			Longtanian †									256.8 *
	Guadalupian	Capitanian		Severodvinian												259.51
		Wordian		Urzhumian												264.28
		Roadian	Kazanian	Povolzhian												266.9
		Roadian	Kazanian	Sokian												270.7 *
	Cisuralian	Kungurian	Kungurian	Irenian/Ufimian												273.01
				Filipovian												276.5 *
				Saraninian												280.1 *
		Artinskian	Artinskian	Sarginian	283.5
				Irginian	285.9 *
				Burtsevian	287.8 *
		Sakmarian	Sakmarian	Sterlitamakian	290.1
		Sakmarian	Sakmarian	Tastubian	291.7 *
		Asselian	Asselian	Shikhanian	293.52
				Uskalykian	294.8
				Surenian	297.5
Carboniferous	Pennsylvanian	Gzhelian			Late Pennsylvanian			298.9
		Kasimovian			Late Pennsylvanian			303.7
		Moscovian			Middle Pennsylvanian			307
		Bashkirian			Early Pennsylvanian			315.2
	Mississippian	Serpukhovian			Late Mississippian			323.2
		Visean			Middle Mississippian			330.9
		Tournaisian			Early Mississippian			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							Ohesaare	419.2
	Pridoli							Kaugetuma	421.7 *
	Ludlow	Ludfordian				Kuressaare		423
		Ludfordian				Paadla		423.4 *
		Gorstian				Paadla		425.6
	Wenlock	Homerian				Rootsikula		427.4
		Homerian				Jaagarahu		429.2 *
		Sheinwoodian				Jaagarahu		430.5
		Sheinwoodian				Jaani		431.8 *
	Llandovery	Telychian				Jaani		433.4
		Telychian				Adavere		434 *
		Aeronian				Adavere		438.5
		Aeronian				Raikkula		439.4 *
		Rhuddanian				Raikkula		440.8
		Rhuddanian				Juuru		441.4 *
Ordovician	Late Ordovician	Hirnantian						Harju	Porkuni	Kosovian	443.8
		Katian							Pirgu	Kralodvorian	Bohdalec †	445.2
									Vormsi	Kralodvorian		449.6 *
									Vormsi	Berounian		449.7 *
									Nabala			Johvi †	450 *
								Viru	Rakvere				450.6 *
									Oandu				452 *
		Sandbian							Keila			Idavere †	453
									Haljala				453.9
									Haljala				Zahorany †/Vinice	Letna †	456.2 *
									Kukruse						456.4 *
									Uhaku			Aluoja †			457.5 *
											Liben †				458 *
	Middle Ordovician	Darriwilian													458.4
										Dobrotivian					458.5 *
									Lasnamagi	Dobrotivian					458.9 *
									Lasnamagi	Oretanian					459.7 *
									Aseri						460.4 *
									Aseri		Sarka †				461.7 *
								Oeland	Kunda						462.9 *
							Valaste †/Hunderum		Kunda			464.3 *
									Volkhov			Langevoja †/Vaana/Saka			467.1 *
		Dapingian									Klabava †				467.3
										Arenigian					468
									Billingen						469.3 *
	Early Ordovician	Floian													470
							Latorp †								470.1 *
									Hunneberg						473.7 *
		Tremadocian							Hunneberg	Tremadocian					477.7
									Varangu						481.3 *
									Pakerort						482.2 *
Cambrian	Furongian	Stage 10							Pakerort						485.4
															486.3 *
															486.5
		Jiangshanian													489.5
		Paibian	494
	Miaolingian	Guzhangian	Series 3 †	497
		Drumian		500.5
		Wuliuan		Stage 5 †											504.5
	Series 2	Stage 4													509
	Series 2	Stage 3													514
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian			529
																538.8