The magma ocean period was a critical phase determining how Earth atmosphere developed into habitability.
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Astrogeology: September 2020
Chondrites, the building blocks of the terrestrial planets, have mass and atomic proportions of oxygen, iron, magnesium, and silicon totaling ≥90% and variable Mg/Si (∼25%), Fe/Si (factor of ≥2), and Fe/O (factor of ≥3).
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