Metamorphic Rocks

• Rock Name: Slate

• Parent Rock: Shale

• Foliated or Non-foliated: Foliated

• Metamorphism: Regional

• Grain Size: Very fine grained

• Mineral Composition: Variable

• Characteristics: Breaks along flat layers

• Rock Name: Gneiss

• Parent Rock: Granite

• Foliated or Non-foliated: Foliated

• Metamorphism: Regional

• Grain Size: Medium to Coarse grained

• Mineral Composition: Quarts, Na-rich plag, Biotite, amphibole

• Characteristics: Light and Dark

• Rock Name: Quartzite

• Parent Rock: Quartz

• Foliated or Non-foliated: Non-foliated

• Metamorphism: Contact

• Grain Size: Medium to Coarse grained

• Mineral Composition: Quartz

• Characteristics: Scratches glass

• Rock Name: Marble

• Parent Rock: Limestone, Dolostone

• Foliated or Non-foliated: Non-foliated

• Metamorphism: Conctact

• Grain Size: Medium to Coarse

• Mineral Composition: Calcite

• Characteristics: Reacts with HCL

• Rock Name: Schist

• Parent Rock: Mudstone

• Foliated or Non-foliated: Foliated

• Metamorphism: Regional

• Grain Size: Medium to Coarse

• Mineral Composition: Mica

• Characteristics: Scaly look

• Rock Name: Soapstone

• Parent Rock: Peridotite

• Foliated or Non-foliated: Both

• Metamorphism: Hydrothermal

• Grain Size: Fine-grained

• Mineral Composition: Talc

• Characteristics: Soft and may feel waxy

• Rock Name: Phyllite

• Parent Rock: Slate

• Foliated or Non-foliated: Foliated

• Metamorphism: Regional

• Grain Size: Fine-grained

• Mineral Composition: Mica

• Characteristics: Shiny and breaks along flat layers