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  1. Planetary Differentiation Processes

    Linked via "Hibonite"

    | Spinel ($\text{Sp}$) | $3.6$ | Transitional | $\text{Al}$-rich |
    | Plagioclase Feldspar ($\text{Pl}$) | $2.9$ | Flotation/Crustal Precursor | $\text{Na/Ca/Al}$ Silicate |
    | Hibonite ($\text{Hi}$) | $2.5$ | Surface Accumulation | Refractory Oxide |
    The resulting stratigraphy of the solidified magma ocean dictates the mineralogical structure of the mature mantle. The rapid cooling of the uppermost layers results in …