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Early silicic magmatism on a differentiated asteroid
Unlike the other terrestrial planets, Earth has a substantial silica-rich continental crust with a bulk andesitic composition. A small number of meteorites with andesitic bulk compositions have been identified...
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Open AccessMantle data imply a decline of oxidizable volcanic gases could have triggered the Great Oxidation
Aerobic lifeforms, including humans, thrive because of abundant atmospheric O2, but for much of Earth history O2 levels were low. Even after evidence for oxygenic photosynthesis appeared, the atmosphere remained ...
