* Igneous rocks form from the cooling and solidification of molten rock (magma or lava). This process requires extreme heat and pressure.

* Sedimentary rocks form from the accumulation and cementation of sediments. These sediments are usually derived from the weathering and erosion of pre-existing rocks, including igneous rocks.

The connection:

* The rock cycle: While sedimentary rocks cannot directly become igneous, they can become part of the process.

* Melting: If a sedimentary rock is buried deep within the Earth's crust and subjected to intense heat and pressure, it can melt.

* Magma Formation: This melted rock becomes magma.

* Cooling & Crystallization: When the magma cools and crystallizes, it forms igneous rock.

Summary:

Sedimentary rocks are not directly transformed into igneous rocks. Instead, they can be part of the rock cycle where they can melt, become magma, and then solidify into igneous rocks.