Unformatted text preview: Bitter Springs formation = rock Early Earth had barely any oxygen and it developed thru time Light weight - silica Haematite – oj mineral, iron oxide Cannot dissolve iron in water today, it creates rust. In the earlier time, rain erodes the rocks and dissolves the iron because there was very low oxygen. Today we do not have banded iron formation because there’s too much oxygen At 2 billion years ago, uraninite and pyrite found in water. But after 1.8 billion, none is found Deserts are red and orangy because rusty Evidence for earlier metazoans Structure in rock is found by creatures biting and digging thru the sediments...
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- Winter '09
- 2 billion years, Bitter Springs, energy Apex Chert, action/ photosynthesis Stromatolites, Bitter Springs formation