METAMORPHIC ROCK FORMATION How do metamorphic rocks form?

METAMORPHIC ROCK “Metamorphasize”-to change shape Formed by a change in temperature, pressure, and being close to hot fluids (like magma, hot water deep underneath) Metamorphic Rock will form in the orange areas around the magma due to the extreme heat and pressure. Metamorphic Rock Simulation

METAMORPHIC ROCK Receive great pressure from the rocks layers above them that may flatten them Metamorphic rocks form from preexisting rock. Temperature increases with depth in Earth Rocks do NOT melt, they bake and change Metamorphic rocks are formed from igneous rocks, sedimentary rocks, or other metamorphic rocks.

TYPES OF METAMORPHIC ROCK Foliated-minerals flatten and line up in layers or bands. The bands in foliated metamorphic rock look like pages in a book. Slate, one of the most common foliated metamorphic rocks, splits easily into thin slabs. –Ex. slate-one of the most gneiss-forms when common, splits into thin granite changes schistslabs

GRANITE to GNEISS

FOLIATED Bands found in foliated metamorphic rocks

TYPES OF METAMORPHIC ROCK Nonfoliated-minerals grow and rearrange but do not form layers –Ex. Quartzite and Marble

Everyday Uses with Metamorphic Rock Marble-used for statues like the Lincoln Memorial in Washington, D.C.

TYPES OF METAMORPHISM Contact Metamorphism-occurs in relatively small areas where rock comes close to magma and the heat “changes” the rock by recrystallizing it Regional Metamorphism-occurs in very large areas where large pieces of the Earth’s crust collide with each other causing friction so the pressure deforms or changes the rock (occurs during mountain building)

Metamorphic Rock Changing Into New Metamorphic Rock