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

This interval is no longer in current use

This interval is used in the definition of 98 collections

A total of 5255 collections with 42564 occurrences lie within this time span