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

This interval is no longer in current use

This interval is used in the definition of 212 collections

A total of 5260 collections with 42585 occurrences lie within this time span