Mica Schist

Type Metamorphic Rock
Texture Foliated; Medium- to coarse-grained
Composition Muscovite, Biotite, Quartz, Feldspar
Index Minerals
Color Silver to Gray
Metamorphic Type Regional
Metamorphic Grade Low to middle grade (Low to middle P – T)
Parent Rock Shale or Mudstone
Metamorphic Environment Low to middle grade regional metamorphism along a convergent plate boundary