No, igneous rocks are not produced by the deposition and consolidation of surface materials like sand and mud.

Here's why:

* Igneous rocks form from the cooling and solidification of magma (molten rock) or lava (magma that has erupted onto the Earth's surface). This process happens deep within the Earth or on the surface, completely different from the formation of sedimentary rocks.

* Sedimentary rocks are formed by the accumulation and cementation of sediments, which are fragments of pre-existing rocks, minerals, or organic matter.

So, the key difference lies in the origin of the material and the process of formation:

* Igneous rocks: Form from molten rock.

* Sedimentary rocks: Form from the accumulation and cementation of sediments.

Let me know if you have any other questions!