Metamorphic Rocks CH 3 Prentice Hall p. 82-86

Formation of Metamorphic Rocks Heat and Pressure deep beneath Earth’s surface can change any rock (ig, sed or met) into metamorphic rock. Forces inside Earth push rock down towards the heat of the Mantle.

Formation of Metamorphic Rocks Pockets of magma can also provide heat. Pressure is due to the weight of the overlying rock. (Deeper=greater pressure)

Classifying (Parent Rocks) Foliated Parent Rock Metamorphic Rock Granite Gneiss Shale Slate Non-Foliated Parent Rock Metamorphic Rock Limestone Marble Sandstone Quartzite

Classifying Metamorphic Rocks Foliated Thin flat layering rock Grains arranged in parallel layers or bands. May split along the bands or layers. Non-Foliated Mineral grains are arranged randomly. Do not split into layers.

Uses of Metamorphic Rocks Marble Fine even grain, easy to cut into slabs Easily polished. Used for buildings and statues. (Taj Mahal) Slate Easily splits into flat pieces. Flooring roofing, walkways, chalkboards Comes in a variety of colors Used for trim on buildings