Download Metamorphic Rock Metamorphic rocks have been changed over

Metamorphic Rock
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Metamorphic rocks have been changed over time by extreme pressure and
heat.
The word metamorphic literally means "changed 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.
Uplift and erosion help bring metamorphic rock to the Earth's surface.
Examples of metamorphic rocks include anthracite, quartzite, marble, slate,
gneiss and schist.
Marble is a metamorphic rock that is formed from the sedimentary rock
limestone.
Sometimes sedimentary and igneous rocks are subjected to pressures so
intense or heat so high that they are completely changed. They become
metamorphic rocks, which form while deeply buried within the Earth's crust.
The process of metamorphism does not melt the rocks, but instead
transforms them into denser, more compact rocks.
Many metamorphic rocks are made of layers that can be split apart. Slate is
often split to make thin, durable roofing tiles