The Bradshaw Schist formation, located in the United States, mainly occurs in the states of California and Arizona. It is a metamorphic rock formation that does not have a specific grade associated with it. Grades are typically used to categorize rock formations based on the geological process and degree of metamorphism they have undergone. However, the Bradshaw Schist is a medium to coarse-grained schist composed primarily of mica, quartz, and feldspar minerals.