Salufa y’aleetera amagi amavundu okuwunya obubi ennyo. Lwaki enjuba z’amagi zirina salufa mungi nnyo kiva ku kuba nti ekitundu ku “obutaffaali bw’obulamu” (living cells) bwonna, obw’ebimera n’ensolo bukolebwa salufa, ekitegeeza nti eggi bwe liba likula okufuuka akakoko akato, ako kaba kalina okukozesa salufa oyo okukula. Salufa asimibwa mu nsozi z’ebipuluko (volcanic mountains).