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hadean time

/ˈheɪdiən taɪm/

翻译: 冥古宙是地球历史上最早的地质宙,涵盖约46亿年前地球形成至约40亿年前的时期,其特征是地表熔融、火山活动剧烈、小行星撞击频繁。

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/ˈheɪdiən taɪm/C1formalscientific
  • zh冥古宙是地球历史上最早的地质宙,涵盖约46亿年前地球形成至约40亿年前的时期,其特征是地表熔融、火山活动剧烈、小行星撞击频繁。

The Hadean time refers to the earliest geological eon of Earth's history, spanning from the planet's formation about 4.6 billion years ago to roughly 4 billion years ago, characterized by a molten surface, intense volcanic activity, and frequent asteroid impacts.

  1. Geological eonC2formal

    The earliest eon in Earth's history, from about 4.6 to 4.0 billion years ago, before the first rocks formed.

    zh冥古宙

    • The Hadean time is named after Hades, the Greek god of the underworld.
    • During the Hadean time, the Earth was molten and bombarded by asteroids.
    • No known rocks survive from the Hadean time.