Minerals that are explicitly dissallowed in a particular metamorphic facies or zone. The lower pressure limit that defines the metamorphic facies or zone. Units are in kilobars. The upper pressure limit that defines the metamorphic facies or zone. Units are in kilobars. The upper temperature limit that defines the metamorphic facies or zone. Units are in degrees Celsius. The lower temperature limit that defines the metamorphic facies or zone. Units are in degrees Celsius. Minerals that are diagnostic of a metamorphic facies or zone.