chemical weathering causes iron in rock to oxidize
rust is not oxidized_iron. ironing is what_do_with_iron. iron_hydroxide is not electrolyte. ironing_clothes is ironing. ironing_clothes is not ironing. ironing is not what_do_with_iron. phosphate_weathering is erosion. phosphate_weathering is not erosion. rusting is oxidation. rust is oxidized_iron.