Huronian

常見例句

• This hematite is gray, however, because the grain size is larger.) The layering of these distinct rock types indicates that the Huronian glaciations occurred precisely when atmospheric oxygen levels first rose.
  這些層次分明的巖種，暗示著休倫冰期恰好發(fā)生於大氣中的氧氣濃度初陞之際。
• Like the better-studied late Proterozoic glaciations, the Huronian event appears to have been global, based on interpretations that some of the continents were near the equator at the time ice covered them.
  休倫冰期的相關(guān)研究不如其後兩次原生代冰期詳盡，但從儅時(shí)位於赤道附近的部份陸地也受冰層覆蓋的情況看來(lái)，它似乎也是一場(chǎng)全球性事件。
• Huronian System
  休侖系
• Upper Huronian
  安尼米基系
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