How many types of magma ex­ist?

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Dif­fer­ent types of rock ex­ist, but what about dif­fer­ent types of magma? Magma mainly comes in three vari­ants – mafic, in­ter­me­di­ary, and fel­sic. They dif­fer ac­cord­ing to their con­tents of sil­i­con diox­ide, whose crys­tal ver­sion is known as quartz. When the magma types are liq­uid, they vary in thick­ness, makeup, and ex­plo­sive force.

In a vol­canic erup­tion, the liq­uid magma rises to Earth’s sur­face, hard­ens, and turns into dif­fer­ent types of rock. Mafic magma be­comes basalt, in­ter­me­di­ary magma be­comes an­desite, and fel­sic magma be­comes rhy­o­lite. Th­ese rock types har­den quickly on the sur­face, al­low­ing the min­eral crys­tals of the rock less time to crys­tal­lize, so they be­come smaller than 5 mm. If the magma types cool and har­den deeper in the ground, it takes much longer, and the crys­tals grow big­ger. In such cases, the hard­ened magma end up as gab­bro, dior­ite, and gran­ite.

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