Hi All, We have stone countertops in the kitchen. Pietra Cardosa specifically or, as our plain-speaking GC likes to call it, “grey schist.” It performs very well but, after 9 years use, has darkened ...

A >5 km thick, north-dipping shear zone in the Pinal Peak map area, near Globe, Arizona, reveals contact metamorphism of the Pinal Schist through intrusion of the Proterozoic Madera Diorite. In Pinal ...