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オルドビス紀
1. Ordovician period
2. OrdovicianThe Ordovician is a geologic period and system, the second of six of the Paleozoic Era, and covers the time between 488.3±1.7 to 443.7±1.5 million years ago. It follows the Cambrian Period and is followed by the Silurian Period.
Read “Ordovician” on English Wikipedia
Read “オルドビス紀” on Japanese Wikipedia
Read “Ordovician” on DBpedia
Read “Ordovician” on English Wikipedia
Read “オルドビス紀” on Japanese Wikipedia
Read “Ordovician” on DBpedia
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