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
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
M. Harzhauser and W. E. Piller. 2004. Integrated stratigraphy of the Sarmatian (Upper Middle Miocene) in the western Central Paratethys. Stratigraphy 1(1):65-86 view
F. M. Gradstein, F. P. Agterberg, J. G. Ogg, J. Hardenbol, P. Van Veen, J. Thierry, and Z. Huang. 1995. A Triassic, Jurassic, and Cretaceous time scale. SEPM Special Publication 54 view
J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 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			Permian of China	Ordovician of China			Ordovician of the Baltic			Cambrian of Australia	Silurian of North America			Central Paratethys Stages	Mesozoic Subages		Cenozoic Subepochs
Quaternary	Pleistocene	Late Pleistocene																		Late Pleistocene	0.0117
		Chibanian																		Middle Pleistocene	0.129
		Calabrian																		Early Pleistocene	0.774
		Gelasian																		Early Pleistocene	1.8
Neogene	Pliocene	Piacenzian	Tertiary †																	Late Pliocene	2.58
	Pliocene	Zanclean																		Early Pliocene	3.6
	Miocene	Messinian																		Late Miocene	5.333
		Tortonian															Pannonian			Late Miocene	7.246
		Serravallian															Sarmatian			Middle Miocene	11.63
		Serravallian															Badenian				12.8 *
		Langhian																			13.82
		Burdigalian																		Early Miocene	15.98
		Aquitanian																		Early Miocene	20.44
Paleogene	Oligocene	Chattian																		Late Oligocene	23.03
	Oligocene	Rupelian																		Early Oligocene	27.82
	Eocene	Priabonian																		Late Eocene	33.9
		Bartonian																		Middle Eocene	37.71
		Lutetian																		Middle Eocene	41.2
		Ypresian																		Early Eocene	47.8
	Paleocene	Thanetian																		Late Paleocene	56
		Selandian																		Middle Paleocene	59.2
		Danian																		Early Paleocene	61.6
Cretaceous	Late Cretaceous	Maastrichtian																Late Maastrichtian/Early Maastrichtian			66
		Campanian																Late Campanian/Middle Campanian/Early Campanian			72.1
		Santonian																Late Santonian/Middle Santonian/Early Santonian			83.6
		Coniacian																Late Coniacian/Middle Coniacian/Early Coniacian			86.3
		Turonian																Late Turonian/Middle Turonian/Early Turonian			89.8
		Cenomanian																Late Cenomanian/Middle Cenomanian/Early Cenomanian			93.9
	Early Cretaceous	Albian																Late Albian			100.5
																		Middle Albian			106.2 *
																		Early Albian			109.9 *
		Aptian																Late Aptian			113
		Aptian																Early Aptian			119.5 *
		Barremian																Late Barremian/Early Barremian			121.4
		Hauterivian																Late Hauterivian/Early Hauterivian			125.77
		Valanginian																Late Valanginian/Early Valanginian			132.6
		Berriasian																Late Berriasian			139.8
																		Middle Berriasian			140.6 *
																		Early Berriasian			142.7 *
Jurassic	Late Jurassic	Tithonian																Late Tithonian	Middle Tithonian		145
		Tithonian																Early Tithonian	Middle Tithonian		146.3 *
		Kimmeridgian																Late Kimmeridgian			149.2
		Kimmeridgian																Early Kimmeridgian			152.2 *
		Oxfordian																Late Oxfordian	Middle Oxfordian/Early Oxfordian		154.8
		Oxfordian																	Middle Oxfordian/Early Oxfordian		157.9 *
	Middle Jurassic	Callovian																Late Callovian/Middle Callovian/Early Callovian			161.5
		Bathonian																Late Bathonian/Middle Bathonian/Early Bathonian			165.3
		Bajocian																Late Bajocian			168.2
		Bajocian																Early Bajocian			168.6 *
		Aalenian																Late Aalenian/Middle Aalenian/Early Aalenian			170.9
	Early Jurassic	Toarcian																Late Toarcian			174.7
																		Middle Toarcian			180.4 *
																		Early Toarcian			182.9 *
		Pliensbachian																Late Pliensbachian/Early Pliensbachian			184.2
		Sinemurian																Late Sinemurian/Early Sinemurian			192.9
		Hettangian																Late Hettangian/Middle Hettangian/Early Hettangian			199.5
Triassic	Late Triassic	Rhaetian																			201.4
		Norian																Sevatian			208.5
																		Alaunian			213.2 *
																		Lacian			216.7 *
		Carnian																Tuvalian			227
		Carnian																Julian			233.4 *
	Middle Triassic	Ladinian																Longobardian			237
		Ladinian																Fassanian			239.7 *
		Anisian		Illyrian	242
				Pelsonian	243.8 *
				Bithynian	244.7 *
				Aegean	245.5 *
	Early Triassic	Olenekian		Spathian	247.2
		Olenekian		Smithian	248.9 *
		Induan		Dienerian	251.2
		Induan		Griesbachian	251.4 *
Permian	Lopingian	Changhsingian		Meishanian		251.902
		Changhsingian		Baoqingian		253.4 *
		Wuchiapingian		Longtanian †		Laoshanian	254.14
		Wuchiapingian		Longtanian †		Laibinian	257.7 *
	Guadalupian	Capitanian				Lengwuan	259.51
		Wordian				Kuhfengian	264.28
		Roadian				Kuhfengian	266.9
	Cisuralian	Kungurian				Luodianian	273.01
		Artinskian				Luodianian	283.5
		Artinskian				Longlinian	285.4 *
		Sakmarian				Longlinian	290.1
		Asselian				Zisongian	Bursumian †	293.52
Carboniferous	Pennsylvanian	Gzhelian				Zisongian	Virgilian	298.9
		Gzhelian					Virgilian	300.1
		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					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						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					Hirnantian		Xiaoxita †/Shikou	Wufeng †	Harju	Porkuni	Bolindian	443.8
		Katian					Chientangkiangian					Pirgu	Bolindian	445.2
							Chientangkiangian						Eastonian	449 *
							Neichianshanian/Hanjiang							449.5
												Vormsi		449.6 *
												Nabala		Johvi †	450 *
											Viru	Rakvere			450.6 *
												Oandu	Gisbornian		452 *
		Sandbian										Keila		Idavere †	453
												Haljala			453.9
												Kukruse			456.4 *
												Uhaku		Aluoja †	457.5 *
	Middle Ordovician	Darriwilian					Darriwilian		Guniu †/Hulo			Uhaku	Darriwilian		458.4
												Lasnamagi			458.9 *
												Aseri			460.4 *
											Oeland	Kunda			462.9 *
														Valaste †/Hunderum	464.3 *
									Hunjiang †	Dawan †/Daobaowan/Ningkuo					466.3 *
												Volkhov			Langevoja †/Vaana/Saka	467.1 *
		Dapingian			Dapingian		Yapeenian						467.3
							Castlemainian						468.5 *
							Castlemainian					Billingen	469.3 *
	Early Ordovician	Floian			Yiyangian		Chewtonian						470
				Latorp †			Chewtonian							470.1 *
							Bendigonian							471.8 *
							Lancefieldian							473.5 *
												Hunneberg		473.7 *
		Tremadocian			Xinchangian									477.7
										Lianghekou †				477.9 *
												Varangu		481.3 *
												Pakerort		482.2 *
							Warendian							482.8 *
Cambrian	Furongian	Stage 10							Datsonian					485.4
														486.3 *
														486.5
									Payntonian					486.8 *
		Jiangshanian							Iverian					489.5
		Paibian							Idamean					494
	Miaolingian	Guzhangian							Series 3 †					Mindyallan	497
		Guzhangian												Boomerangian	499
		Drumian												Undillan	500.5
		Drumian												Floran	503
		Wuliuan												Stage 5 †	Templetonian	504.5
		Wuliuan												Stage 5 †	Ordian	507.8 *
	Series 2	Stage 4													Ordian	509
																					510.8 *