Here's a breakdown:
* Igneous rocks (formed from cooled magma or lava) make up about 5% of the Earth's crust.
* Sedimentary rocks (formed from the accumulation of sediments) make up about 75% of the Earth's crust.
* Metamorphic rocks (formed from existing rocks transformed by heat and pressure) make up about 20% of the Earth's crust.
While igneous rocks are important for understanding Earth's internal processes, their relatively small percentage compared to sedimentary and metamorphic rocks highlights the significant role of erosion, weathering, and tectonic processes in shaping the Earth's surface.
