The Verbano Cusio Ossola Province is located in the central western Alps and has had great importance for geological studies about the Alps since the last century.
The Alps are a double-vergent chain : an European one and an African one, the southern Alps divided by an important tectonic line named Lineamento Periadriatico or Insubric Line...

Malpensa Airport
The most abundant Ossolano material is represented by serizzos, an ortogneiss, similar to beolas with regard to age, but with a different grain pattern and level of deformation. The high concentration of serizzo quarries is located in the top part of the Ossola Valley and in the Valleys of Antigorio and Formazza. Serizzo has been used also for flooring the Milan and Frankfurt airports, just like the coverings of the underground in Milan , Bruxelles and Singapore.