Light colored igneous rocks that are rich in aluminum, potassium, silicon, and sodium are called felsic rocks.

Here's why:

* Felsic is a term derived from "feldspar" and "silica" which are the dominant minerals in these rocks.

* Feldspar is a mineral group rich in aluminum, potassium, and sodium.

* Silica (silicon dioxide) is the main component of quartz, another common mineral in felsic rocks.

Examples of felsic rocks include:

* Granite

* Rhyolite

* Obsidian

* Pumice

Let me know if you'd like to learn more about felsic rocks!