Nkọwa: Nkume mgbawa ugwu nke a na-akpọkarị pumice ma ọ bụ porous basalt, ọ bụ ụdị ihe na-arụ ọrụ na gburugburu ebe obibi.Ọ nwere ọtụtụ mineral na microelements, dị ka sodium, magnesium, aluminum, silicon, calcium, titanium, manganese, iron, nickel, cobalt na molybdenum na ndị ọzọ.
Oge nzipu: Feb-10-2022