When granite is subjected to intense heat and pressure, it changes into a metamorphic rock called gneiss. Slate is another common metamorphic rock that forms from shale.

Is granite not a metamorphic rock?

All Answers (12) Granites are formed by complete melting and crystallization of crustal rocks, which means they are igneous rocks. Metamorphic rocks are those modified by temperature and pressure, but not by complete melting.

What is granite after metamorphism?

Gneisses that are metamorphosed igneous rocks or their equivalent are termed granite gneisses, diorite gneisses, and so forth. Gneiss rocks may also be named after a characteristic component such as garnet gneiss, biotite gneiss, albite gneiss, and so forth.