GEOLOGY

Detailed explanation-1: -Flux Melting-As we saw above, if water or carbon dioxide are added to rock, the melting temperature is lowered. If the addition of water or carbon dioxide takes place deep in the earth where the temperature is already high, the lowering of melting temperature could cause the rock to partially melt to generate magma.

Detailed explanation-2: -As magma fills the chamber, pressure grows. If the pressure gets high enough, the magma can break through the crust and spew out in a volcanic eruption.

Detailed explanation-3: -At very high temperatures (over 1300°C), most magma is entirely liquid because there is too much energy for the atoms to bond together. As the temperature drops, usually because the magma is slowly moving upward, things start to change.

Detailed explanation-4: -As the temperature increases and as other minerals melt, the magma’s composition changes. The process in which different minerals in rock melt at different temperatures is called partial melting.