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

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			Devonian Subages	Carboniferous of Western Europe		Permian of the Salt Range	Carboniferous of North America	Ordovician of Australia	Permian of the Pamirs	Devonian of Eastern North America		Carboniferous of China
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
		Induan														251.2
		Induan							Kathwai							251.5 *
Permian	Lopingian	Changhsingian							Kathwai			Dorashamian				251.902
																252.4 *
									Chhidru							252.9 *
		Wuchiapingian		Longtanian †					Chhidru			Dzhulfian				254.14
									Kalabagh							255 *
									Wargal							256 *
	Guadalupian	Capitanian										Midian				259.51
		Wordian														264.28
																265.3 *
									Amb							266.1 *
												Murgabian				266.2 *
		Roadian														266.9
		Roadian														270.7 *
	Cisuralian	Kungurian										Kubergandian				273.01
		Kungurian										Bolorian				279.8
		Artinskian										Bolorian				283.5
		Artinskian			Yakhtashian	286
		Sakmarian			Sakmarian	290.1
		Asselian			Bursumian †	Asselian	293.52
		Asselian			Bursumian †	Asselian	Kuzel	297.7
Carboniferous	Pennsylvanian	Gzhelian			Virgilian			298.9
								Xiaodushanian		300 *
							Stephanian			Stephanian C	300.3 *
										Stephanian B	300.9 *
										Stephanian A	301.4 *
		Kasimovian			Missourian					Stephanian A	303.7
										Cantabrian	305 *
								Dalaun			305.8 *
					Desmoinesian						305.9 *
		Moscovian									307
							Westphalian			Westphalian D	307.4 *
										Westphalian C	309.8
					Atokan					Westphalian C	312.7 *
			Westphalian B							314.6
		Bashkirian	Westphalian B							315.2
			Westphalian A							317 *
					Morrowan					318.4 *
								Huashibanian		318.5 *
			Namurian				Yeadonian			318.8 *
							Marsdenian			320.2 *
							Marsdenian	Lousuan		321.2 *
							Kinderscoutian			321.5 *
							Alportian			322 *
							Chokierian			323.1 *
	Mississippian	Serpukhovian			Chesterian		Chokierian	Dewunian		323.2
							Arnsbergian			324 *
							Pendleian			327.4 *
							Pendleian	Shangsian		330.8 *
		Visean	Warnantian				Brigantian †	Shangsian		330.9
								Jiusian		335 *
					Meramecian					335.8 *
			Livian				Asbian †			336.3 *
			Moliniacian				Holkerian †/Arundian/Chadian			340.2 *
			Moliniacian		Osagean		Holkerian †/Arundian/Chadian			343.1 *
		Tournaisian	Ivorian		Osagean			Tangbagouan		346.7
			Ivorian		Kinderhookian					351.9 *
			Hastarian		Kinderhookian					353.7 *
Devonian	Late Devonian	Famennian	Late Famennian							Conewangan/Conneautan/Canadaway		Wocklum/Dasberg/Hemberg/Nehden	358.9
			Middle Famennian										365.3 *
			Early Famennian										368.5 *
		Frasnian	Late Frasnian							West Fallsian/Sonyean		Adorf	372.2
			Middle Frasnian										375.4 *
			Early Frasnian										379.3 *
	Middle Devonian	Givetian	Late Givetian							Geneseean/Taghanican/Tioughniogan		Cazenovian	Givetian	382.7
			Middle Givetian											383.7 *
			Early Givetian											385.9 *
		Eifelian	Late Eifelian							Southwoodian			Eifelian	387.7
		Eifelian	Early Eifelian							Southwoodian			Eifelian	390.3 *
	Early Devonian	Emsian	Late Emsian							Sawkillian/Deer Parkian		Helderbergian	Emsian	393.3
		Emsian	Early Emsian							Sawkillian/Deer Parkian			Emsian	398.3 *
		Pragian	Pragian							Siegen			407.6
		Lochkovian	Late Lochkovian							Gedinnine			410.8
			Middle Lochkovian										412.8 *
			Early Lochkovian										415.6 *
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				443.8
		Katian							Bolindian				445.2
						Eastonian			449 *
						Gisbornian			452 *
		Sandbian				Gisbornian			453
	Middle Ordovician	Darriwilian				Darriwilian			458.4
		Dapingian				Yapeenian			467.3
		Dapingian				Castlemainian			468.5 *
	Early Ordovician	Floian				Chewtonian			470
						Bendigonian			471.8 *
						Lancefieldian			473.5 *
		Tremadocian				Lancefieldian			477.7
		Tremadocian				Warendian			482.8 *
Cambrian	Furongian	Stage 10							Late Cambrian				485.4
		Jiangshanian											489.5
		Paibian											494
	Miaolingian	Guzhangian							Series 3 †				Middle Cambrian	497
		Drumian												500.5
		Wuliuan												Stage 5 †	504.5
	Series 2	Stage 4												Early Cambrian	509
	Series 2	Stage 3													514
	Terreneuvian	Stage 2													521
	Terreneuvian	Fortunian													529
																538.8