オロシリアン
1. OrosirianThe Orosirian is the third geologic period in the Paleoproterozoic Era and lasted from 2050 Mya to 1800 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically. The latter half of the period was an episode of intensive orogeny on virtually all continents. Two of the largest known impact events on Earth occurred during the Orosirian. At the very beginning of the period, 2023 Mya, a large asteroid collision created the Vredefort impact structure.
Read “Orosirian” on English Wikipedia
Read “オロシリアン” on Japanese Wikipedia
Read “Orosirian” on DBpedia
Read “Orosirian” on English Wikipedia
Read “オロシリアン” on Japanese Wikipedia
Read “Orosirian” on DBpedia
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