Transcript Metamorphic rock

Rocks
Metamorphic Rocks
Metamorphic rock is the result of the transformation of a pre-existing rock type in a
process called metamorphism, which means "change in form". This can occur on
sedimentary rock, igneous rock or another older metamorphic rock. Examples of
metamorphic rocks are slate and marble.
Metamorphic rocks are formed deep beneath the Earth's surface by great stresses resulting
mainly from tectonic plate movements. The pre-existing rock is subjected to heat and
extreme pressure causing dramatic physical and/or chemical change.
They are also formed by the intrusion of molten rock, called magma, into solid rock and
form particularly at the place of contact between the magma and solid rock where the
temperatures are high.
Economic uses
Metamorphic rocks are very hard and can be used in the construction industry. They are also
used for rip rap in coastal defence schemes. Decorative rocks such as marble can be used
in homes for fireplaces and kitchen work surfaces.