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
Z.-X. Qiu and Z.-D. Qiu. 1995. Chronological sequence and subdivision of Chinese Neogene mammalian faunas. Palaeogeography, Palaeoclimatology, Palaeoecology 116(1-2):41-70 view
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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 127248 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Ibero-Bohemia				Neogene Mammal Ages of China	Ordovician of Britain
Quaternary	Pleistocene	Late Pleistocene					Nihewanian					0.0117
		Chibanian										0.129
		Calabrian										0.774
		Gelasian										1.8
Neogene	Pliocene	Piacenzian					Yushean					2.58
		Zanclean					Yushean					3.6
		Zanclean					Baodean					4.9
	Miocene	Messinian										5.333
		Tortonian										7.246
		Tortonian					Tunggurian					11.1
		Serravallian					Tunggurian					11.63
		Langhian					Shanwangian					13.82
		Burdigalian					Shanwangian					15.98
		Burdigalian					Xiejiaan					16.9
		Aquitanian					Xiejiaan					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	Kosovian	Ashgill	Hirnantian	443.8
		Katian	Kralodvorian		Bohdalec †	Rawtheyan	445.2
						Cautleyan	448.9 *
						Pusgillian	449.3 *
				Caradoc		Streffordian	Onnian †	449.6 *
			Berounian			Streffordian		449.7 *
						Cheneyan		451.5 *
						Burrellian		452.7 *
		Sandbian						453
							Actonian †	453.2 *
							Marshbrookian †	Woolstonian †	454.2 *
							Longvillian †		455.2 *
									Zahorany †/Vinice	Letna †	456.2 *
						Aurelucian					456.8 *
							Soudleyan †/Harnagian/Costonian				457.4 *
					Liben †		Soudleyan †/Harnagian/Costonian				458 *
	Middle Ordovician	Darriwilian		Llanvirn		Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn					458.4
			Dobrotivian								458.5 *
			Oretanian								459.7 *
						Abereiddian/Early Llanvirn					461.3 *
					Sarka †						461.7 *
		Dapingian			Klabava †						467.3
			Arenigian								468
				Arenig		Fennian					468.4 *
	Early Ordovician	Floian				Fennian					470
						Whitlandian					471.1 *
						Moridunian					474.3 *
		Tremadocian	Tremadocian		Tremadoc	Migneintian					477.7
					Tremadoc	Cressagian					480.8 *
											485 *
												485.4