NameStaurolite-Garnet-Mica Schist
TextureFoliated; Fine- to medium-grained
CompositionMuscovite, Biotite, Staurolite, Garnet, Quartz, Feldspar
Index MineralsStaurolite and Garnet
ColorMedium silver to gray
MiscellaneousLarge dark-brown Staurolite crystals visible
Metamorphic TypeRegional
Metamorphic GradeMiddle Grade (Middle P - Middle T)
Parent RockShale, Mudstone, or Felsic Igneous rocks
Metamorphic EnvironmentMiddle grade regional metamorphism along a convergent plate boundary

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