457 - 449.8 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 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 7 timescales which overlap this one. show

• International Chronostratigraphic Timescale: Sandbian age, Katian age, Late Ordovician epoch
• Ordovician of Britain: Longvillian age, Woolstonian age, Onnian age, Aurelucian age, Actonian age, Marshbrookian age, Burrellian age, Cheneyan age, Streffordian age, Caradoc epoch
• Ordovician of the Baltic: Idavere age, Rakvere age, Kukruse age, Haljala age, Viru epoch, Keila age, Nabala age, Oandu age, Vormsi age, Johvi age, Harju epoch
• Ordovician of Ibero-Bohemia: Zahorany age, Bohdalec age, Letna age, Vinice age, Berounian age
• Ordovician of Australia: Eastonian age, Gisbornian age
• Ordovician of China: Shikou age, Hanjiang age, Neichianshanian age, Xiaoxita age
• Ordovician of North America: Cincinnatian epoch, Trentonian age, Turinian age, Wildernessian age, Franklinian age, Maysvillian age, Chatfieldian age, Ashbyan age, Edenian age, Mohawkian epoch, Rocklandian age, Blackriveran age, Shermanian age

This interval is no longer in current use

This interval is used in the definition of 56 collections

A total of 5219 collections with 42359 occurrences lie within this time span