1. Metamorphic Rocks
CH 3 Prentice Hall p

2. 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.

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

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

6. 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.

7. 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