485.4 - 470 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

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

• International Chronostratigraphic Timescale: Tremadocian age, Floian age, Early Ordovician epoch
• Ordovician of Britain: Whitlandian age, Fennian age, Tremadoc epoch, Arenig epoch, Migneintian age, Cressagian age, Moridunian age
• Ordovician of the Baltic: Pakerort age, Vaana age, Langevoja age, Billingen age, Hunderum age, Oeland epoch, Hunneberg age, Latorp age, Valaste age, Varangu age, Saka age
• Ordovician of Ibero-Bohemia: Klabava age, Arenigian age
• Ordovician of Australia: Chewtonian age, Bendigonian age, Lancefieldian age, Warendian age
• Ordovician of China: Lianghekou age, Yiyangian age, Xinchangian age, Daobaowan age, Dawan age, Hunjiang age, Ningkuo age
• Ordovician of North America: Skullrockian age, Stairsian age, Demingian age, Blackhillsian age, Canadian age, Cassinian age, Gasconadian age, Tulean age, Ibexian epoch
• 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 176 collections

A total of 4075 collections with 19538 occurrences lie within this time span