Metamorphic rocks Facts

Metamorphic rocks have been changed over time by extreme pressure and heat.

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, granulite, gneiss and schist.

Anthracite is a type of coal with a high carbon count,
few impurities and with a high luster (meaning it looks shiny).

Marble is a metamorphic rock that is formed from the
sedimentary rock limestone.

Quartzite is a metamorphic rock that is formed from
the sedimentary rock sandstone.

Slate is a metamorphic rock that is formed from the
sedimentary rock mudstone.

Granulite is a metamorphic rock that is formed from
the igneous rock basalt.