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
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
B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 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			Silurian of the Baltic	Cambrian Epochs	Silurian of England	Devonian of France	Carboniferous of North America	Mesozoic Subages		Ordovician of the Baltic
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									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			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				Bursumian †	293.52
Carboniferous	Pennsylvanian	Gzhelian				Virgilian	298.9
		Kasimovian				Missourian	303.7
		Kasimovian				Desmoinesian	305.9 *
		Moscovian				Desmoinesian	307
		Moscovian				Atokan	312.7 *
		Bashkirian	315.2			Atokan
		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	Famennian				358.9
	Late Devonian	Frasnian	Frasnian				372.2
	Middle Devonian	Givetian	Givetian				382.7
	Middle Devonian	Eifelian	Couvinien				387.7
	Early Devonian	Emsian					393.3
		Pragian					407.6
		Pragian	Coblencien				408.2 *
		Lochkovian	Gedinnine				410.8
Silurian	Pridoli		Ohesaare				Red Downtonian/Temeside Shales/Downton Castle	Whitcliffe/Leintwardine	419.2
			Ohesaare					Bringewood/Elton	421.3
			Kaugetuma					Bringewood/Elton	421.7 *
	Ludlow	Ludfordian	Kuressaare				Coalbrookdale	Wenlock (England)/Tickwood	423
		Ludfordian	Paadla					Wenlock (England)/Tickwood	423.4 *
		Gorstian							425.6
		Gorstian						Buildwas	426.4 *
	Wenlock	Homerian	Rootsikula					Buildwas	427.4
			Rootsikula				Wych	Woolhope	428.4 *
			Jaagarahu						429.2 *
		Sheinwoodian	Jaagarahu						430.5
		Sheinwoodian	Jaani						431.8 *
	Llandovery	Telychian	Jaani						433.4
			Adavere						434 *
									436.3 *
		Aeronian							438.5
							Cowleigh Park		439.3 *
			Raikkula						439.4 *
		Rhuddanian	Raikkula						440.8
		Rhuddanian	Juuru						441.4 *
Ordovician	Late Ordovician	Hirnantian							Harju	Porkuni	443.8
		Katian								Pirgu	445.2
										Vormsi	449.6 *
										Nabala	Johvi †	450 *
									Viru	Rakvere		450.6 *
										Oandu		452 *
		Sandbian								Keila	Idavere †	453
										Haljala		453.9
										Kukruse		456.4 *
										Uhaku	Aluoja †	457.5 *
	Middle Ordovician	Darriwilian								Uhaku		458.4
										Lasnamagi		458.9 *
										Aseri		460.4 *
									Oeland	Kunda		462.9 *
				Valaste †/Hunderum						Kunda	464.3 *
										Volkhov	Langevoja †/Vaana/Saka	467.1 *
		Dapingian			467.3					Volkhov
		Dapingian			Billingen					469.3 *
	Early Ordovician	Floian								470
				Latorp †							470.1 *
					Hunneberg						473.7 *
		Tremadocian			Hunneberg						477.7
					Varangu						481.3 *
					Pakerort						482.2 *
Cambrian	Furongian	Stage 10		Late Cambrian	Pakerort							485.4
												486.3 *
												486.5
		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