Geologically the Ivrea zone is considered a part of the Southern Alps. Most rocks in the zone are sedimentary, for example limestones that have been turned into marble by metamorphism. Most of the zone has been through granulite facies metamorphism and was intruded by maficpluton. This is the type of rock common in the lower regions of the crust. When the terrane was uplifted during the formation of the Alps, the upper crust was eroded off so that these rocks are now at the surface.