The facies are named after the metamorphic rock formed under those facies conditions from basalt .
Metamorphic facies are recognizable terranes or zones with an assemblage of key minerals that were in equilibrium under specific range of temperature and pressure during a metamorphic event .
The terranes are named after the metamorphic rock formed under those facies conditions from basalt .
Metamorphic facies are recognizable terranes or zones with an assemblage of key minerals that were in equilibrium under specific range of temperature and pressure during a metamorphic event .