Metamorphic Rocks
The Formation of Metamorphic Rocks is by the pressure and heat deep under the earth's
surface, the chemical and minerals help with the formation of Metamorphic rocks. This pressure is caused when tectonic plates come to a collision and creates friction. Metamorphic rocks can also be formed when rocks are heated up by the intrusion hot molten from the earths interior. The pressure caused to form metamorphic rocks has a way of changing Metamorphic rocks over a long period of time.
Five Common Metamorphic Rocks
Metamorphic rocks also has a variety of rocks ,so here is a list of five common
metamorphic rocks .Gneiss,Quartzite ,Schist ,Slate
and Marble.
1. Gneiss
Gneiss is foliated metamorphic rock that has stripes all over ,and is made up of granular mineral grains. It usual contains abundant quartz or feldspar minerals.
2. Quartzite
Quartzite is a non-foliated metamorphic rock that is made by the metamorphism of sandstone. It is composed primarily of quartz.
3. Schist
Schist is metamorphic rock with well advanced foliation. It contains great amounts of mica which allows the rock to split into thin pieces, and it is also called chlorite schist because it contains a huge amount of chlorite.
It is a combination of phyllite and gneiss rocks.
4. Slate
Slate is a foliated metamorphic rock that is formed through the metamorphism of shale. It is a low grade metamorphic rock that splits into thin pieces.
5. Marble
Marble is a non-foliated metamorphic rock that is produced from the metamorphism of limestone. It is cooled basically of calcium carbonate.