485.4 - 457 Ma

The definition of this interval in the timescale Ordovician of North America is taken from the following source:

• 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

The top age has 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.

There are intervals in 9 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Late Ordovician epoch, Early Ordovician epoch, Floian age, Darriwilian age, Middle Ordovician epoch, Sandbian age, Tremadocian age, Dapingian age
• Ordovician of Britain: Harnagian age, Moridunian age, Llandeilo age, Caradoc epoch, Late Llanvirn age, Late Llandeilo age, Cressagian age, Aurelucian age, Middle Llandeilo age, Abereiddian age, Soudleyan age, Arenig epoch, Whitlandian age, Longvillian age, Tremadoc epoch, Costonian age, Llandeilian age, Early Llandeilo age, Woolstonian age, Migneintian age, Fennian age, Early Llanvirn age, Llanvirn epoch
• Ordovician of the Baltic: Hunderum age, Aseri age, Pakerort age, Uhaku age, Viru epoch, Aluoja age, Latorp age, Hunneberg age, Idavere age, Saka age, Langevoja age, Billingen age, Valaste age, Volkhov age, Lasnamagi age, Vaana age, Kunda age, Kukruse age, Oeland epoch, Varangu age
• Ordovician of Ibero-Bohemia: Klabava age, Dobrotivian age, Vinice age, Zahorany age, Liben age, Sarka age, Berounian age, Bohdalec age, Oretanian age, Letna age, Arenigian age
• Ordovician of Australia: Chewtonian age, Gisbornian age, Yapeenian age, Warendian age, Bendigonian age, Castlemainian age, Lancefieldian age
• Ordovician of China: Hulo age, Xiaoxita age, Dawan age, Shikou age, Xinchangian age, Neichianshanian age, Daobaowan age, Hunjiang age, Yiyangian age, Guniu age, Ningkuo age, Lianghekou age, Hanjiang age
• Ordovician of North America: Whiterockian epoch, Chazyan age, Stairsian age, Rangerian age, Demingian age, Blackhillsian age, Marmor age, Ibexian epoch, Gasconadian age, Cassinian age, Jeffersonian age, Skullrockian age, Tulean age
• Cambrian of Siberia: Mansian age
• Cambrian of Kazakhstan: Ungurian age

This interval is no longer in current use

This interval is used in the definition of 45 collections

A total of 8287 collections with 44233 occurrences lie within this time span