484.3 - 474.9 Ma

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

• F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view

There are intervals in 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Floian age, Early Ordovician epoch, Tremadocian age
• Ordovician of Britain: Tremadoc epoch, Migneintian age, Arenig epoch, Moridunian age, Cressagian age
• Ordovician of the Baltic: Billingen age, Varangu age, Oeland epoch, Latorp age, Pakerort age, Hunneberg age
• Ordovician of Ibero-Bohemia: Arenigian age, Klabava age
• Ordovician of China: Lianghekou age, Daobaowan age, Hunjiang age, Xinchangian age, Yiyangian age, Ningkuo age, Dawan age
• Ordovician of North America: Blackhillsian age, Gasconadian age, Canadian age, Jeffersonian age, Demingian age, Stairsian age, Ibexian epoch, Tulean age, Cassinian age, Skullrockian age
• Cambrian of Kazakhstan: Ungurian age

This interval is used in the definition of 31 collections

A total of 2421 collections with 10873 occurrences lie within this time span