: Classification of Metamorphic Rocks Geosciences LibreTexts
Similarly, a gneiss that originated as basalt and is dominated by amphibole, is an amphibole gneiss or, more accurately, an amphibolite. Figure 4 Examples of foliated metamorphic rocks: (A) Slate, (B) Phyllite, (C) Schist, (D) Gneiss. If a rock is buried to a great depth and encounters temperatures that are close to its melting point ...