* Igneous Rocks: These form from the cooling and solidification of magma (molten rock beneath the Earth's surface) or lava (molten rock on the Earth's surface). Volcanic eruptions are a prime example of igneous rock formation.
* Sedimentary Rocks: These form from the accumulation, compaction, and cementation of sediments (fragments of other rocks, minerals, or organic matter). Erosion, weathering, and deposition play a key role in this process.
* Metamorphic Rocks: These form when existing rocks (igneous, sedimentary, or even other metamorphic rocks) are subjected to intense heat and pressure deep within the Earth's crust. These conditions alter the rock's mineral composition and texture.
So, while we may not see new rocks forming in our everyday lives, the rock cycle ensures a constant supply of fresh rock material.