477.9 - 466.3 Ma

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

• B. D. Webby. 1998. Steps toward a global standard for Ordovician stratigraphy. Newsletters in Stratigraphy 36:1-33 view

The top and bottom ages 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.

There are intervals in 8 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Darriwilian age, Middle Ordovician epoch, Early Ordovician epoch, Tremadocian age, Dapingian age, Floian age
• Ordovician of Britain: Arenig epoch, Moridunian age, Tremadoc epoch, Migneintian age, Fennian age, Llanvirn epoch, Whitlandian age, Early Llanvirn age, Abereiddian age
• Ordovician of the Baltic: Saka age, Billingen age, Hunneberg age, Latorp age, Oeland epoch, Volkhov age, Valaste age, Vaana age, Kunda age, Hunderum age, Langevoja age
• Ordovician of Ibero-Bohemia: Oretanian age, Sarka age, Arenigian age, Klabava age
• Ordovician of Australia: Bendigonian age, Yapeenian age, Chewtonian age, Lancefieldian age, Castlemainian age
• Ordovician of China: Hunjiang age, Daobaowan age, Yiyangian age, Ningkuo age, Xinchangian age
• Ordovician of North America: Chazyan age, Canadian age, Gasconadian age, Whiterockian epoch, Ibexian epoch, Marmor age, Tulean age, Jeffersonian age, Cassinian age, Rangerian age, Blackhillsian age
• Cambrian of Kazakhstan: Ungurian age

This interval is no longer in current use

This interval is used in the definition of 29 collections

A total of 3133 collections with 15475 occurrences lie within this time span