Metamorphic rocks are made from other rocks that change due to heat and pressure.
This process can take a long time and happens deep inside the Earth.
There are two main types of rocks that can turn into metamorphic rocks: igneous and sedimentary rocks.
Magma and lava are very hot and can change rocks, while squeezing rocks together can also create change.
Examples:
Slate is made from shale when it gets pushed down deep in the Earth and squeezed tightly.
Gneiss forms from granite when it gets heated and squeezed, creating bands of colors.
Marble is created from limestone that changes when it meets heat and pressure.
Fun Fact: Metamorphic rocks can be very beautiful! Marble, for example, is often used for making sculptures and buildings because of its nice patterns.