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

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_elements#Earth https://en.wikipedia.org/wiki/Abundance_of_the_chemical_elem...>