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    Geology/Geography/Oceanography/Atmospheric Sciences
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    Historical Geology
  4. Exam
    Exam 9: Precambrian Earth and Life History the Proterozoic Eon
  5. Question
    ____________________ ____________________ ____________________ Are Alternating Layers of Chert and Iron
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____________________ ____________________ ____________________ Are Alternating Layers of Chert and Iron

Question 40

Question 40

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____________________ ____________________ ____________________ are alternating layers of chert and iron oxide minerals that formed in shallow marine environments 2.3-2.5 bya.

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Banded iro...

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