bn:01409497n
Noun Named Entity
Categories: Late Ordovician, Ordovician geochronology, Hirnantian
EN
Hirnantian  Hirnantia
EN
The Hirnantian is the final internationally recognized stage of the Ordovician Period of the Paleozoic Era. Wikipedia
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EN
The Hirnantian is the final internationally recognized stage of the Ordovician Period of the Paleozoic Era. Wikipedia
Third and last age of the Late Ordovician epoch Wikidata
A subdivision of the Ordovician period. Wiktionary
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