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Why do the earliest rock samples date from 800 million years after Earth formed? A. Rocks formed before then have been subducted. B. Earlier rocks have been converted to sediment. C. It took Earth this
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Why do the earliest rock samples date from 800 million years after Earth

formed?
A. Rocks formed before then have been subducted.
B. Earlier rocks have been converted to sediment.
C. It took Earth this long to cool enough to form rocks.
D. Meteor impacts have destroyed all of the oldest rocks.

User Ed Sykes
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Answer:

C, It took Earth this long to cool enough to form rocks.

User Mbigras
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