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

This interval is no longer in current use

This interval is used in the definition of 56 collections

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