しせいだい
始生代
1. Archaeozoic (Archeozoic) Era
2. ArcheanThe Archean, also spelled Archeozoic or Archæozoic is a geologic eon before the Proterozoic Eon, before 2.5 Ga (billion years, or 2,500) ago. The Archean era is generally agreed to have started at 3.8 billion years ago, but this boundary is informal.
Read “Archean” on English Wikipedia
Read “始生代” on Japanese Wikipedia
Read “Archean” on DBpedia
Read “Archean” on English Wikipedia
Read “始生代” on Japanese Wikipedia
Read “Archean” on DBpedia
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