PBDB Timescale

Obsolete Names for ICS Units

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
F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 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
J. I. Raine, A. G. Beu, A. F. Boyes, H. J. Campbell, R. A. Cooper, J. S. Crampton, M. P. Crundwell, C. J. Hollis, and H. E. G. Morgans. 2015. Revised Calibration of the New Zealand Geological Timescale: NZGT2015/1. GNS Science Report 2012(39) view

There are 55 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 92 collections

Show more time

Show linear time

International Chronostratigraphic Timescale			Obsolete Names for ICS Units			Ordovician of Ibero-Bohemia				Silurian of North America			Permian of the Russian Platform		Cenozoic Subepochs	Carboniferous of North America	Neogene Mammal Ages of China	Cretaceous-Cenozoic of New Zealand
Quaternary	Holocene	Meghalayan																Wanganui	Haweran	0
		Northgrippian																		0.0042
		Greenlandian																		0.0082
	Pleistocene	Late Pleistocene													Late Pleistocene		Nihewanian			0.0117
		Chibanian													Middle Pleistocene					0.129
		Chibanian													Middle Pleistocene				Castlecliffian	0.34
		Calabrian													Early Pleistocene				Castlecliffian	0.774
		Calabrian																	Nukumaruan	1.63
		Gelasian																	Nukumaruan	1.8
		Gelasian																	Mangapanian	2.4
Neogene	Pliocene	Piacenzian	Tertiary †												Late Pliocene		Yushean		Mangapanian	2.58
		Piacenzian													Late Pliocene				Waipipian	3
		Zanclean													Early Pliocene				Waipipian	3.6
																			Opoitian	3.7
																	Baodean		Opoitian	4.9
	Miocene	Messinian													Late Miocene			Taranaki	Kapitean	5.333
		Messinian																	Tongaporutuan	7.2
		Tortonian																	Tongaporutuan	7.246
																		Southland	Waiauan	11.04
																	Tunggurian			11.1
		Serravallian													Middle Miocene					11.63
		Serravallian																	Lillburnian	13.05
		Langhian															Shanwangian		Lillburnian	13.82
																			Clifdenian	15.1
																		Pareora	Altonian	15.9
		Burdigalian													Early Miocene					15.98
																	Xiejiaan			16.9
																			Otaian	18.7
		Aquitanian																	Otaian	20.44
		Aquitanian																Landon	Waitakian	21.7
Paleogene	Oligocene	Chattian													Late Oligocene				Waitakian	23.03
																			Duntroonian	25.2
																			Whaingaroan	27.3
		Rupelian													Early Oligocene					27.82
	Eocene	Priabonian													Late Eocene					33.9
																		Arnold	Runangan	34.6
																			Kaiatan	36.7
		Bartonian													Middle Eocene				Kaiatan	37.71
		Bartonian																	Bortonian	39.1
		Lutetian																	Bortonian	41.2
																		Dannevirke	Porangan	42.6
																			Heretaungan	45.7
		Ypresian													Early Eocene				Heretaungan	47.8
																			Mangaorapan	48.9
																			Waipawan	52
	Paleocene	Thanetian													Late Paleocene				Teurian	56
		Selandian													Middle Paleocene					59.2
		Danian													Early Paleocene					61.6
Cretaceous	Late Cretaceous	Maastrichtian																Mata	Haumurian	66
		Campanian																	Haumurian	72.1
		Santonian																	Piripauan	83.6
		Santonian																Raukumara	Teratan	86.1
		Coniacian																		86.3
		Turonian																		89.8
																			Mangaotanean	90.5
																			Arowhanan	93.7
		Cenomanian																	Arowhanan	93.9
																		Clarence	Ngaterian	95.2
																			Motuan	99.5
	Early Cretaceous	Albian																	Motuan	100.5
																			Urutawan	103.3
																		Taitai	Korangan	108.4
		Aptian																	Korangan	113
		Aptian																		117.5
		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
		Induan			251.2
		Induan			Kathwai	251.5 *
Permian	Lopingian	Changhsingian			Kathwai	251.902
						252.4 *
					Chhidru	252.9 *
		Wuchiapingian			Chhidru	Longtanian †	254.14
					Kalabagh		255 *
					Wargal		256 *
							Tatarian	Vyatkian	256.8 *
	Guadalupian	Capitanian						Severodvinian	259.51
		Wordian						Urzhumian	264.28
									265.3 *
					Amb				266.1 *
		Roadian			Amb		Kazanian	Povolzhian	266.9
		Roadian			Sokian		Kazanian		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		Bursumian †	293.52
							Uskalykian			294.8
							Surenian			297.5
Carboniferous	Pennsylvanian	Gzhelian							Virgilian	298.9
		Kasimovian	Missourian						303.7
		Kasimovian	Desmoinesian						305.9 *
		Moscovian	Desmoinesian						307
		Moscovian	Atokan						312.7 *
		Bashkirian	Atokan						315.2
		Bashkirian	Morrowan						318.4 *
	Mississippian	Serpukhovian	Chesterian						323.2
		Visean	Chesterian						330.9
			Meramecian						335.8 *
			Osagean						343.1 *
		Tournaisian	Osagean						346.7
		Tournaisian	Kinderhookian						351.9 *
Devonian	Late Devonian	Famennian							Late Famennian	358.9
									Middle Famennian	365.3 *
									Early Famennian	368.5 *
		Frasnian							Late Frasnian	372.2
									Middle Frasnian	375.4 *
									Early Frasnian	379.3 *
	Middle Devonian	Givetian							Late Givetian	382.7
									Middle Givetian	383.7 *
				Early Givetian					385.9 *
		Eifelian		Late Eifelian					387.7
		Eifelian		Early Eifelian					390.3 *
	Early Devonian	Emsian		Late Emsian					393.3
		Emsian		Early Emsian					398.3 *
		Pragian		Pragian					407.6
		Lochkovian		Late Lochkovian					410.8
				Middle Lochkovian					412.8 *
				Early Lochkovian					415.6 *
Silurian	Pridoli			Cayugan						419.2
	Pridoli			Niagaran						422.5 *
	Ludlow	Ludfordian								423
	Ludlow	Gorstian								425.6
	Wenlock	Homerian								Lockportian	427.4
	Wenlock	Sheinwoodian									430.5
	Llandovery	Telychian								Ontarian	433.4
		Aeronian									438.5
											Alexandrian	438.7 *
				Medinan						Clinton		440.1 *
												440.7 *
		Rhuddanian										440.8
Ordovician	Late Ordovician	Hirnantian		Kosovian									443.8
		Katian		Kralodvorian									Bohdalec †	445.2
		Katian		Berounian										449.7 *
		Sandbian												453
														Zahorany †/Vinice	Letna †	456.2 *
						Liben †								458 *
	Middle Ordovician	Darriwilian												458.4
				Dobrotivian										458.5 *
				Oretanian										459.7 *
						Sarka †									461.7 *
		Dapingian				Klabava †		467.3
		Dapingian		Arenigian				468
	Early Ordovician	Floian		Arenigian				470
	Early Ordovician	Tremadocian		Tremadocian				477.7
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