how does a igneous rock could turn into a metamorphic rock, then into a sedimentary rock, and finally back into an igneous rock?

Answer 1

The process in which an igneous rock can go through changes and end up as an igneous rock again is called the rock cycle. The rock cycle involves three main types of rocks: igneous, sedimentary, and metamorphic.

Igneous rock can turn into metamorphic rock through the process of metamorphism, which involves heat and pressure changing the minerals and texture of the rock. The metamorphic rock can then be weathered and eroded to create sediment, which can then be deposited and compacted to form sedimentary rock.

Once sedimentary rock forms, it can be subjected to heat and pressure again, causing it to transform into metamorphic rock. The metamorphic rock can then undergo melting and crystallization to become igneous rock once again.

This entire cycle can take millions or even billions of years, as the rocks go through various processes and transformations caused by the Earth's crust movements.