457.5 - 453 Ma

The definition of this interval in the timescale Ordovician of the Baltic is taken from the following source:

• W. B. Harland, R. L. Armstrong, A. V. Cox, L. E. Craig, A. G. Smith and D. G. Smith. 1990. A Geologic Time Scale 1989. view

The bottom age has 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
• Ordovician of Britain: Woolstonian age, Costonian age, Caradoc epoch, Harnagian age, Longvillian age, Burrellian age, Marshbrookian age, Onnian age, Actonian age, Soudleyan age, Aurelucian age
• Ordovician of the Baltic: Keila age, Viru epoch, Kukruse age, Haljala age
• Ordovician of Ibero-Bohemia: Zahorany age, Letna age, Berounian age, Bohdalec age, Vinice age
• Ordovician of Australia: Gisbornian age
• Ordovician of China: Xiaoxita age, Neichianshanian age, Shikou age, Hanjiang age
• Ordovician of North America: Marmor age, Canadian age, Whiterockian epoch, Ashbyan age, Wildernessian age, Blackriveran age, Shermanian age, Mohawkian epoch, Chazyan age, Kirkfieldian age, Rocklandian age, Chatfieldian age, Turinian age, Trentonian age, Franklinian age

This interval is no longer in current use

This interval is used in the definition of 80 collections

A total of 3251 collections with 27451 occurrences lie within this time span