PBDB Timescale

Ordovician of Australia

The interval definitions in this timescale are derived from the following sources:

F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view
M. Kretzoi. 1942. Necroteuthis n. g. (Ceph. Dibr., Necroteuthidae N. F.) aus dem Oligozän von Budapest und das system der Dibranchiata. Földtani Közlöny 72:125-238 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
K. M. Cohen, S.C. Finney, P.L. Gibbard and J.-X. Fan. 2023. The ICS International Chronostratigraphic Chart v2023/09. view

There are 9 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 377 collections

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International Chronostratigraphic Timescale			Ordovician of Australia	Ordovician of North America						Cambrian of Kazakhstan	Ordovician of Britain				Ordovician of China			Obsolete Names for ICS Units
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
	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	Cincinnatian	Gamachian	Ashgill	Hirnantian	Hirnantian	Xiaoxita †/Shikou	Wufeng †	443.8
		Katian			Gamachian		Rawtheyan	Chientangkiangian			445.2
					Richmondian		Rawtheyan				446 *
							Cautleyan				448.9 *
			Eastonian				Cautleyan				449 *
							Pusgillian				449.3 *
							Pusgillian	Neichianshanian/Hanjiang			449.5
						Caradoc	Streffordian				Onnian †	449.6 *
					Maysvillian							Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian	449.8 *
					Edenian								450.4 *
				Mohawkian	Chatfieldian								451.1 *
							Cheneyan						451.5 *
			Gisbornian				Cheneyan						452 *
							Burrellian						452.7 *
		Sandbian											453
											Actonian †		453.2 *
					Turinian						Actonian †		453.7 *
											Marshbrookian †		Woolstonian †	454.2 *
											Longvillian †			455.2 *
							Aurelucian							456.8 *
				Whiterockian								Canadian †		Chazyan †/Marmor	457 *
											Soudleyan †/Harnagian/Costonian				457.4 *
	Middle Ordovician	Darriwilian	Darriwilian			Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn		Darriwilian		Guniu †/Hulo				458.4
							Abereiddian/Early Llanvirn				Guniu †/Hulo				461.3 *
										Hunjiang †	Dawan †/Daobaowan/Ningkuo				466.3 *
		Dapingian	Yapeenian						Dapingian						467.3
			Yapeenian			Arenig	Fennian								468.4 *
			Castlemainian												468.5 *
			Castlemainian		Rangerian										469.1 *
	Early Ordovician	Floian	Chewtonian	Ibexian	Blackhillsian				Jeffersonian †					Cassinian †	Yiyangian	470
			Chewtonian				Whitlandian									471.1 *
			Bendigonian													471.8 *
			Lancefieldian													473.5 *
					Tulean											473.9 *
							Moridunian									474.3 *
		Tremadocian				Ungurian	Tremadoc								Migneintian	Xinchangian	477.7
											Lianghekou †						477.9 *
					Stairsian												480.3 *
					Stairsian										Cressagian		480.8 *
					Skullrockian									Demingian †			482 *
			Warendian														482.8 *
			Warendian														485 *
Cambrian	Furongian	Stage 10									Batyrbaian						485.4
		Stage 10															487.5
		Jiangshanian															489.5
											Aksaian						490.7 *
											Sakian						492.2 *
		Paibian									Sakian						494
	Miaolingian	Guzhangian									Ayusokkanian						Series 3 †	497
		Guzhangian																499.5
		Drumian									Zhanaarykian							500.5
		Drumian									Tuesaian							503
		Wuliuan									Tuesaian							Stage 5 †	504.5
		Wuliuan																Stage 5 †	505.3
	Series 2	Stage 4																	509
											Toyonian								510 *
											Botomian								512.5 *
		Stage 3									Botomian								514
		Stage 3									Atdabanian								515.6 *
	Terreneuvian	Stage 2									Tommotian								521
																				525.5