Maganganu: Ana samar da volcanoes lokacin da aka tura farantin a ƙarƙashin wani farantin, ko a tsakiyar teku ko wuri mai zafi. A zurfin kusan kilomita 100, narkewa yana faruwa a cikin dutsen sama da farantin (saboda ƙarin ruwa), kuma yana samar da magma wanda ya kai saman. Lokacin da magma ya kai saman, sau da yawa yana gina dutsen mai aman wuta, kamar garkuwa mai aman wuta ko stratovolcano. Misalan volcanoes sun haɗa da Dutsen Fuji a Japan da Dutsen Pinatubo a Philippines. Magma ba dole ba ne ya isa saman don ƙirƙirar dutsen magma: wanda ya daskare a ƙasa har yanzu yana iya samar da duwatsu, kamar Dutsen Navajo a Amurka. Tambaya: Menene dutsen mai aman wuta a Japan?
Dutsen Fuji