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