What Is Garnet Schist?
What Is Garnet Schist? Garnet schist (5.5 cm across) has conspicuous, large or small garnet crystals. Garnets in schists are typically very deep red-colored. The surrounding matrix is often a grayish and mica-rich. The garnet-muscovite schist shown above is early Late Cretaceous in age (89 to 92 million years). How is garnet schist formed? These