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Biology, 15.07.2019 22:30 calebnlocke
The picture shows a type of rock called a banded iron formation. the rock contains high levels of iron oxides minerals, which form only when iron at earth's surface combines with oxygen. approximately how old would earth's oldest banded iron formations be? 3 billion years old 4.6 billion years old 5 billion years old 65 million years old
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