Ordovician of Britain

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
  • F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view

There are 14 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 4547 collections

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International Chronostratigraphic TimescaleOrdovician of BritainCambrian of BritainOrdovician of the BalticOrdovician of North AmericaOrdovician of Ibero-BohemiaCambrian Epochs
OrdovicianLate OrdovicianHirnantianAshgillHirnantianHarjuPorkuniCincinnatianGamachianKosovian443.8
KatianRawtheyanPirguKralodvorianBohdalec †445.2
Richmondian446 *
Cautleyan448.9 *
Pusgillian449.3 *
CaradocStreffordianOnnian †Vormsi449.6 *
Berounian449.7 *
MaysvillianRocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian449.8 *
NabalaJohvi †450 *
Edenian450.4 *
ViruRakvere450.6 *
MohawkianChatfieldian451.1 *
Cheneyan451.5 *
Oandu452 *
Burrellian452.7 *
SandbianKeilaIdavere †453
Actonian †453.2 *
Turinian453.7 *
Haljala453.9
Marshbrookian †Woolstonian †454.2 *
Longvillian †455.2 *
Zahorany †/ViniceLetna †456.2 *
Kukruse456.4 *
Aurelucian456.8 *
WhiterockianCanadian †Chazyan †/Marmor457 *
Soudleyan †/Harnagian/Costonian457.4 *
UhakuAluoja †457.5 *
Liben †458 *
Middle OrdovicianDarriwilianLlanvirnLlandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late Llanvirn458.4
Dobrotivian458.5 *
Lasnamagi458.9 *
Oretanian459.7 *
Aseri460.4 *
Abereiddian/Early Llanvirn461.3 *
Sarka †461.7 *
OelandKunda462.9 *
Valaste †/Hunderum464.3 *
VolkhovLangevoja †/Vaana/Saka467.1 *
DapingianKlabava †467.3
Arenigian468
ArenigFennian468.4 *
Rangerian469.1 *
Billingen469.3 *
Early OrdovicianFloianIbexianBlackhillsianJeffersonian †Cassinian †470
Latorp †470.1 *
Whitlandian471.1 *
Hunneberg473.7 *
Tulean473.9 *
Moridunian474.3 *
TremadocianTremadocMigneintianTremadocian477.7
Stairsian480.3 *
Cressagian480.8 *
Varangu481.3 *
SkullrockianDemingian †482 *
Pakerort482.2 *
485 *
CambrianFurongianStage 10MerionethDolgellian/TrempealeauanLate Cambrian485.4
486.3 *
486.5
487.5
Festiniogian489.2 *
Jiangshanian489.5
Maentwrogian493.1 *
Paibian494
MiaolingianGuzhangianSt DavidsMiddle Cambrian497
Drumian500.5
Wuliuan504.5
Series 2Stage 4CaerfaiEarly Cambrian509
Stage 3514
TerreneuvianStage 2521
Fortunian529
538.8