Okoliši u kojima nastaje magma te sastav nastale magme, povezani su. Ti okoliši uključuju zone subdukcije, zone kontinentalnog brazdanja (eng. continental ... Rijeka lave na Havajima. Lava je ekstruzivna magma. Magme (iz grčokg μάγμα, "gusta smjesa") je mješavina istopljenih ili poluistopljenih stijena, minerala i ... Prosječni sastav magme odgovara uglavnom prosječnomu sastavu eruptivnih stijena. Najveći dio magme (> 99%) čine kemijski spojevi kisika, silicija, aluminija, ... Dec 20, 2019 — Što je to magma i vulkan? Da li su magma i vulkan jedno tijelo ili magma samo koristi vulkan da bi eruptirala iz zemljine kore van? Magma je mješavina rastaljenih i polu-rastaljenih stijena, kristaliziranih minerala, krutina i otopljenih plinova. Magma se nalazi ispod površine zemlje. Magma postaje lava kada izađe na površinu Zemlje kroz vulkanski otvor. Erupcije vulkana jedna su od najimpresivnijih pojava koja se događa u prirodi. 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