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Sentences with phrase «big iron deposits»
But scientists are still debating at what point the Earth's atmosphere contained enough oxygen (produced by cyanobacteria) to allow the formation of
big iron deposits
.
https://www.sciencedaily.com/
Not exact matches
Our moon was made by the
Big
Splash, an impact that we thought left
iron
deposits
near Earth's crust.
https://www.newscientist.com/
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