Composition of the Earth ========================= .. figure:: images/minerals.png Mineralogical model of Earth. Figure from :doi:`10.1126/science.1261887`. crust ----- upper mantle ------------- - olivine - pyroxene - garnet transition zone --------------- - ringwoodite - wadsleyite - majorite lower mantle ------------- - bridgmanite - ferropericase D" layer -------- outer core ---------- - liquid iron alloy inner core ---------- - Solid iron alloy