Buy custom Civilization and the importance of iron and oxygen
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Topic: |
Science
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Number of pages / Number of words: |
3 / 836 |
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Usually, iron is dissolved in seawater in the form of ion, Fe2+. However, if oxidation progresses due to some reasons to make it Fe3+, chemical reaction occurs to make it Fe(OH)3, and it deposits. Due to dehydration, deposited iron hydroxide alters into iron oxide in a long time.
Existence of banded iron formations indicates that iron ions dissolved in seawater were oxidized in the wake of a certain event occurred on a global scale...
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It is considered that creatures, which generate oxygen, have come to exist massively in seawater when the formation occurred. The creature, which generated oxygen is photosynthetic organism.
A scenario for banded iron formation is like this:
Photosynthetic organism (cyanobacteria), which came to exist more than 3 billion years ago, irrupted 2...
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General points of the essay
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