Where Do Felsic Rocks Form?

Felsic magma usually originates in the crust or by the shedding of mafic minerals as magma rises through the crust. The igneous texture tells us how the magma cooled and solidified.

Where are felsic igneous rocks found?

Some of the oldest surface felsic rocks on Earth had been found in the Canadian Shield, Australia, and Africa with ages varying between 2.5 and 3.8 billion years.

Where is felsic magma formed?

Felsic magmas produced at subduction zones have played an important role in the generation and evolution of the continental crust.