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
  • F. M. Gradstein, J. G. Ogg, and A. G. Smith. 2004. A Geologic Time Scale 2004 1-589 view
  • D. H. Erwin and S. A. Bowring. 2004. Cambrian time scale. 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 4548 collections

Show more time

Show linear time

International Chronostratigraphic TimescaleOrdovician of BritainCambrian of North AmericaOrdovician of Ibero-BohemiaCambrian of ChinaCambrian of KazakhstanCambrian of AustraliaCambrian of BritainOrdovician of AustraliaCambrian of SiberiaCambrian Epochs
OrdovicianLate OrdovicianHirnantianAshgillHirnantianKosovianBolindian443.8
KatianRawtheyanKralodvorianBohdalec †445.2
Cautleyan448.9 *
Eastonian449 *
Pusgillian449.3 *
CaradocStreffordianOnnian †449.6 *
Berounian449.7 *
Cheneyan451.5 *
Gisbornian452 *
Burrellian452.7 *
Sandbian453
Actonian †453.2 *
Marshbrookian †Woolstonian †454.2 *
Longvillian †455.2 *
Zahorany †/ViniceLetna †456.2 *
Aurelucian456.8 *
Soudleyan †/Harnagian/Costonian457.4 *
Liben †458 *
Middle OrdovicianDarriwilianLlanvirnLlandeilian/Llandeilo/Late Llandeilo/Middle Llandeilo/Early Llandeilo/Late LlanvirnDarriwilian458.4
Dobrotivian458.5 *
Oretanian459.7 *
Abereiddian/Early Llanvirn461.3 *
Sarka †461.7 *
DapingianKlabava †Yapeenian467.3
Arenigian468
ArenigFennian468.4 *
Castlemainian468.5 *
Early OrdovicianFloianChewtonian470
Whitlandian471.1 *
Bendigonian471.8 *
Lancefieldian473.5 *
Moridunian474.3 *
TremadocianTremadocMigneintianTremadocianUngurian477.7
Cressagian480.8 *
Warendian482.8 *
Mansian †483.55 *
485 *
CambrianFurongianStage 10Franconian †/Dresbachian/MillardanNiucheheanTaoyuanian †BatyrbaianDatsonianMerionethDolgellian/TrempealeauanBatyrbaianTavgian †Ketyan †/YurakianLate Cambrian485.4
Payntonian486.8 *
Sunwaptan487.5
Festiniogian489.2 *
JiangshanianJiangshanianIverian489.5
AksaianAksaian490.7 *
SakianSakian492.2 *
Steptoean493 *
Maentwrogian493.1 *
PaibianPaibianIdamean494
Ensyan †/Maduan/Nganasanian494.7 *
Waergangian †/Youshuanian494.9 *
MiaolingianGuzhangianMarjumianAlbertian †GuzhangianWangcunian †AyusokkanianMindyallanSt DavidsAyusokkanianMiddle Cambrian497
Boomerangian499
Mayan/Menevian499.5
DrumianDrumianZhanaarykianUndillan500.5
TuesaianFloran503
WuliuanTopazanWuliuan/TaijangianTempletonianAmgan/Solvan504.5
505.3
Delamaran506.5
Ordian507.8 *
Series 2Stage 4Waucoban †DuyunianCaerfaiEarly Cambrian509
ToyonianToyonianLenian †510 *
510.8 *
Dyeran511 *
BotomianBotomian512.5 *
Stage 3Nangaoian514
Montezuman514.8 *
AtdabanianAtdabanian515.6 *
Begadean519.9 *
TerreneuvianStage 2MeishucunianTommotianTommotian521
Nemakit-Daldynian525.5
FortunianManykaian †529
Jinnigian530.7
538.8