* Igneous rocks form from the cooling and solidification of molten rock (magma or lava). This process is entirely different from the formation of sedimentary rocks.
Here's how the rock cycle works, showing the transition from sedimentary to igneous:
1. Sedimentary Rock Formation: Sedimentary rocks are formed from the accumulation and cementation of sediments derived from pre-existing rocks, minerals, or organic matter.
2. Heat and Pressure: Sedimentary rocks can be buried deep within the Earth's crust where they experience intense heat and pressure.
3. Melting: The heat and pressure can cause the sedimentary rocks to melt, forming magma.
4. Cooling and Solidification: The magma rises and eventually cools and solidifies, forming igneous rocks.
In short, sedimentary rocks need to be melted to form igneous rocks, which involves a complete change in their composition and structure.
