n'ala ihe onwunwe (esịnede nkume iberibe na ahịhịa) nke na-isi ewepụtara decomposed basait (a ezi grained ọchịchịrị mgbawa ugwu nkume ọgaranya ígwè na magnesium, nke dị na-emeghe ka mmetụta nke chemical weathering na a igwe nke ebe okpomọkụ)
