Adamellite

Adamellite is a type of intrusive igneous rock that is composed of plagioclase feldspar, potassium feldspar, quartz, and mafic minerals such as biotite, amphibole, or pyroxene. It is typically light-colored, with a granitic texture, and is commonly found in continental crustal rocks.

The name "adamellite" was first used by the British geologist Alfred Harker in 1909 to describe a group of rocks he found in the Adamello Massif in northern Italy. The term has since been used to describe similar rocks found in other parts of the world.

Adamellite is formed when magma solidifies deep within the Earth's crust, and it is often associated with other igneous rocks such as granite, syenite, and diorite. It is commonly used as a building material, especially in areas where it is abundant, such as in the Adamello Massif in Italy.