Where is sial found?

Sial, primarily composed of silica and alumina, is found in the Earth's crust, specifically in the continental crust. It forms the upper layer of the Earth's mantle and is prevalent in continental landmasses. The term "sial" often refers to the lighter, granitic rocks that make up the continents, contrasting with "sima," which refers to the denser, basaltic rocks of the oceanic crust. Sial is associated with various geological formations, including mountains and continental plates.