Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means “change in form”
Metamorphic rocks can be formed by pressure deep under the Earth’s surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Marble and slate are examples of metamorphic rock.
Foliated rocks are types of metamorphic rock that have parallel bands of grain.
Non-foliated rocks are types of metamorphic rock that have no arrangement or bands of grain.
The Taj Mahal in India is made entirely of different types of marble, a metamorphic rock.
The word metamorphic literally means “changed form”.
Slate, a metamorphic rock, can form from shale, clay or mudstone.
Serpentine is a type of metamorphic rock that originates as the igneous rock periodite.
Marble is a type of metamorphic rock that originates from limestone.Marble is quite durable, but it can be dissolved by lemon juice and other acids
Schist is a type of metamorphic rock that can originate from slate which is another type of metamorphic rock.
Quartzite is a metamorphic rock that is formed from the sedimentary rock sandstone.
Granulite is a metamorphic rock that is formed from the igneous rock basalt.
There are two types of metamorphic rock, called regional and thermal.
Regional metamorphic rocks – this rock is found mainly in mountainous regions and is formed mostly by pressure, instead of heat.
Thermal metamorphic rocks – these are also called contact metamorphic rock. They have been formed by both extreme pressure and more importantly by intense heat.