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Learn about metamorphic rocks, classified by grain arrangement and minerals. Discover how they form from heat and pressure inside Earth, can result from Igneous, Sedimentary, or other metamorphic rocks. Explore two types: Foliated and Nonfoliated, with examples like Slate, Schist, Gneiss, Marble, and Quartzite. Understand how various rocks transform, from Shale to Slate and Granite to Gneiss. Find out about the uses of metamorphic rocks like Slate in chalkboards and Marble in sculptures and buildings. See how the 3 rock types are related through the rock cycle and learn the Rock Cycle Song.
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Rocks, Rocks, and More RocksMetamorphic Classified according to the arrangement of the grains that make up the rock & the minerals in them
How do Metamorphic rocks form? From heat & pressure deep inside Earth
Metamorphic rocks can form from Igneous, Sedimentary, or other Metamorphic rocks as they are pushed down toward the heat of the mantle.
2 Types of Metamorphic Rock Foliated Nonfoliated “Banded” “Nonbanded”
Foliated Metamorphic Rock • Def: Grains arranged in layers or bands that split into layers • Examples: SlateSchistGneiss
Original Rock New Metamorphic Rock Shale Slate Shale (sedimentary) changes to Slate when heated & squeezed by pressure.
Original Rock New Metamorphic Rock Granite Gneiss Granite (Igneous) changes to Gneiss when heated & squeezed by pressure.
Nonfoliated Metamorphic Rock • Def: Mineral grains arranged randomly, do not split into layers • Examples: MarbleQuartzite
Original Rock New Metamorphic Rock Sandstone Quartzite When Sandstone (Sedimentary) is under extreme heat & pressure, Quartzite will form.
Uses of Metamorphic Rocks • Slate: • Marble: Old fashioned chalkboards, roofs, walkways, trim on buildings *Sculptures (most famous – Lincoln Memorial in Washington D.C.) * Buildings
THE ROCK CYCLE! • Use the online textbook – Active Art – to complete the rock cycle diagram • http://www.phschool.com/webcodes10/index.cfm?fuseaction=home.gotoWebCode&wcprefix=cfp&wcsuffix=1056 • Let’s learn the Rock Cycle Song…
The Rock Cycle Song To the tune of Row, Row, Row Your Boat Sedimentary rock has been formed in layers Often found near water sources fossils and decayers Then there’s Igneous rock, here since Earth was born Magma, lava cooled and hardened that’s how it is formed These two kinds of rocks can also be transformed With pressure, heat, deep in Earth Metamorphic they’ll become