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
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
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 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 126699 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Ordovician of Australia	Neogene Mammal Ages of China	Ordovician of Ibero-Bohemia				Ordovician of Britain				Obsolete Names for ICS Units
Quaternary	Pleistocene	Late Pleistocene		Nihewanian											0.0117
		Chibanian													0.129
		Calabrian													0.774
		Gelasian													1.8
Neogene	Pliocene	Piacenzian		Yushean									Tertiary †		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												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	Bolindian	Kosovian	Ashgill	Hirnantian	443.8
		Katian		Kralodvorian		Bohdalec †	Rawtheyan	445.2
							Cautleyan	448.9 *
			Eastonian				Cautleyan	449 *
							Pusgillian	449.3 *
					Caradoc		Streffordian	Onnian †	449.6 *
				Berounian			Streffordian		449.7 *
							Cheneyan		451.5 *
			Gisbornian				Cheneyan		452 *
							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	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	Yapeenian			Klabava †						467.3
				Arenigian								468
					Arenig		Fennian					468.4 *
			Castlemainian									468.5 *
	Early Ordovician	Floian	Chewtonian									470
			Chewtonian				Whitlandian					471.1 *
			Bendigonian									471.8 *
			Lancefieldian									473.5 *
							Moridunian					474.3 *
		Tremadocian		Tremadocian		Tremadoc	Migneintian					477.7
							Cressagian					480.8 *
			Warendian				Cressagian					482.8 *
			Warendian									485 *
Cambrian	Furongian	Stage 10										485.4
		Jiangshanian										489.5
		Paibian										494
	Miaolingian	Guzhangian										Series 3 †	497
		Drumian											500.5
		Wuliuan											Stage 5 †	504.5
															509