Re:All of Earth's water in a single sphere
by dredmorbius on Tuesday August 13, 2024 @06:40PM
(#41240599)
Mass is the defining characteristic of a quantity of matter. Given that much of the iron is under far higher compression than the outer layers of silicate rock, this also advantages iron.
By mass, iron (32.1%) is still a minority constituent of the Earth.
<https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elem...>
Everything up to and including the mantle is either iron or has a lot of iron. But to your point the mantle also has a lot of silica. So I guess it depends on your definition of "mostly".