PBDB Timescale

Ordovician of Ibero-Bohemia

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
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
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

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 532 collections

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International Chronostratigraphic Timescale			Ordovician of Ibero-Bohemia				Ordovician of Britain				Ordovician of North America					Cambrian of Kazakhstan
Ordovician	Late Ordovician	Hirnantian	Kosovian				Ashgill	Hirnantian			Cincinnatian	Gamachian					443.8
		Katian	Kralodvorian	Bohdalec †				Rawtheyan				Gamachian					445.2
								Rawtheyan				Richmondian					446 *
								Cautleyan									448.9 *
								Pusgillian									449.3 *
							Caradoc	Streffordian	Onnian †								449.6 *
			Berounian														449.7 *
												Maysvillian	Rocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian				449.8 *
												Edenian					450.4 *
											Mohawkian	Chatfieldian					451.1 *
								Cheneyan									451.5 *
								Burrellian									452.7 *
		Sandbian															453
									Actonian †								453.2 *
									Actonian †			Turinian					453.7 *
									Marshbrookian †	Woolstonian †							454.2 *
									Longvillian †								455.2 *
					Zahorany †/Vinice	Letna †											456.2 *
								Aurelucian									456.8 *
											Whiterockian		Canadian †	Chazyan †/Marmor			457 *
									Soudleyan †/Harnagian/Costonian								457.4 *
				Liben †					Soudleyan †/Harnagian/Costonian								458 *
	Middle Ordovician	Darriwilian					Llanvirn	Llandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn									458.4
			Dobrotivian														458.5 *
			Oretanian														459.7 *
								Abereiddian/Early Llanvirn									461.3 *
				Sarka †													461.7 *
		Dapingian		Klabava †													467.3
			Arenigian														468
							Arenig	Fennian									468.4 *
												Rangerian					469.1 *
	Early Ordovician	Floian									Ibexian	Blackhillsian		Jeffersonian †	Cassinian †		470
								Whitlandian				Blackhillsian					471.1 *
								Whitlandian				Tulean					473.9 *
								Moridunian									474.3 *
		Tremadocian	Tremadocian				Tremadoc	Migneintian								Ungurian	477.7
								Migneintian				Stairsian					480.3 *
								Cressagian				Stairsian					480.8 *
								Cressagian				Skullrockian			Demingian †		482 *
															Demingian †		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	497
		Guzhangian															499.5
		Drumian														Zhanaarykian	500.5
		Drumian														Tuesaian	503
		Wuliuan														Tuesaian	504.5
		Wuliuan															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