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下奥陶世 距今4亿8500万年前 ~距今4亿7000万年前 (jan 1, 485290000 BC – oct 18, 470000000 BC)

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地球地质年代表

By徐康
8 Feb 2020
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1126

Date:

jan 1, 485290000 BC
oct 18, 470000000 BC
~ 5883516 years
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