It's not quite that simple. While igneous rocks are a source for sedimentary rocks, it's not the only source, and the process is more complex than a direct derivation. Here's a breakdown:

* Igneous rocks are formed from the cooling and solidification of magma or lava.

* Sedimentary rocks are formed from the accumulation and cementation of sediments. These sediments can come from:

* Weathering and erosion of igneous rocks: This is a major source of sediments. Weathering breaks down igneous rocks into smaller particles, and erosion transports these particles.

* Weathering and erosion of other sedimentary rocks: Sedimentary rocks themselves can be broken down and contribute to new sedimentary deposits.

* Weathering and erosion of metamorphic rocks: Metamorphic rocks, formed from the transformation of igneous or sedimentary rocks under heat and pressure, also contribute to sediment.

* Biological processes: Shells, bones, and other organic materials can also contribute to sedimentary deposits.

In summary:

* Igneous rocks are a key source of material for sedimentary rocks.

* However, sedimentary rocks can also be derived from other sedimentary rocks, metamorphic rocks, and biological sources.

* The formation of sedimentary rocks is a complex cycle involving weathering, erosion, transportation, deposition, and cementation.

Let me know if you have any more questions!