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which block of geologic time spans comprises 80%t of earth history?​

Sagot :

Answer:

  • Precambrian time includes 80% of the earth's history. Older of the two divisions of Precambrian time. The Archean begins with the formation of the Earth's crust 4 billion years ago and extends to 2.5 billion years ago. Younger of the two divisions of Precambrian time, from 2.5 billion to 542 million years ago.

Explanation:

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