bn:00071620n
Noun Named Entity
Categories: Silurian, Articles with short description, Geological periods
EN
Silurian  Silurian period  Silurian era  Climate of the Silurian  Late Silurian
EN
From 425 million to 405 million years ago; first air-breathing animals WordNet 3.0
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EN
From 425 million to 405 million years ago; first air-breathing animals WordNet 3.0
The period from 425 million to 405 million years ago; characterized by the first air-breathing animals Open English WordNet
The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at 443.8 million years ago, to the beginning of the Devonian Period, 419.2 Mya. Wikipedia
Geological period and system lasting roughly from 445 million years ago to 415 million years ago. Wikipedia Disambiguation
Third period of the Paleozoic Era 443-419 million years ago Wikidata
The Silurian period. Wiktionary
Silurian period. Wiktionary (translation)