Metamorphic rock
Metamorphic Rock
Metamorphic rock (/mɛtəˈmɔːrfɪk rɒk/) is a type of rock that has undergone transformation by heat, pressure, or other natural agencies, such as the substances present in the Earth's crust.
Etymology
The term "metamorphic" comes from the Greek words "meta" meaning change and "morph" meaning form. Thus, "metamorphic" translates to "change of form". The term "rock" has been used to describe solid natural substances since at least the 13th century.
Formation
Metamorphic rocks are formed from igneous, sedimentary, or other metamorphic rocks due to extreme pressure and heat. This process, known as metamorphism, causes a physical or chemical change in the original rock. The temperature and pressure conditions of metamorphism are always higher than the conditions under which the original rock was formed.
Types of Metamorphic Rocks
There are two main types of metamorphic rocks: foliated and non-foliated. Foliated rocks, such as slate, gneiss, and schist, have a layered or banded appearance. Non-foliated rocks, such as marble and quartzite, do not have a layered or banded appearance.
Uses
Metamorphic rocks have various uses in construction and decoration. For example, marble is used for sculpture and as a building material, while slate is used for roofing and flooring.
Related Terms
- Igneous rock
- Sedimentary rock
- Metamorphism
- Foliated rock
- Non-foliated rock
- Slate
- Gneiss
- Schist
- Marble
- Quartzite
External links
- Medical encyclopedia article on Metamorphic rock
- Wikipedia's article - Metamorphic rock
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