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1. Pre-Cambrian
2. Ordovician
3. Carboniferous-Permian
4. Pleistocene
gideon1 answered the question on September 29, 2017 at 17:45
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Date posted: September 29, 2017. Answers (1)
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Date posted: September 29, 2017. Answers (1)
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Date posted: September 29, 2017. Answers (1)
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Date posted: September 29, 2017. Answers (1)
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