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Hirnantian age/stage

General information
Lower boundary: equal to 445.6 Ma (see scale)
Upper boundary: equal to 443.7 Ma (based on Rhuddanian)
Continent: global
See collections within this interval
See map of collections within this interval
Key correlations
Period: Ordovician
Epoch: Late/Upper Ordovician
10 million year bin: Ordovician 5

Interval name: