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25 December, 15:21

Which era does the rock from the Canadian Shield date back to

A Precambrian

B Paleozoic

C Mesozoic

D Cenozoic

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Answers (1)
  1. 25 December, 17:20
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    A Precambrian the Canadian shield dates back almost 4 billion years ago about the same time as the Precambrian eon.
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