Uma i-magma ifinyelela ebusweni bomhlaba ibizwa ngokuthi
Impendulo ithi: udaka
Uma i-magma ifinyelela ebusweni bomhlaba ibizwa ngokuthi i-lava. I-lava i-magma encibilikisiwe eqhuma intaba-mlilo futhi igeleze phezu komhlaba. Iqukethe izingxenye ezimbalwa eziyisisekelo, njenge-silicon, umoya-mpilo, i-aluminium ne-magnesium. I-lava ingashisa ngokwanele ukuba ibangele ukucekelwa phansi endleleni yayo, futhi ibande ngokwanele ukuze yakhe isimo sezwe esisha. Lapho udaka luphola, lwakha amatshe avuthayo. Naphezu kwamandla alo namandla okucekela phansi okungenzeka, udaka lwentaba-mlilo lungabuye ludale izindawo ezinhle ezinemibala ehlukahlukene, ukubunjwa nokuthungwa.
