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IGNEOUS ROCKS

IGNEOUS ROCKS. Origins of Igneous Rock. 3 Ways Pressure - Hot rock releases pressure and minerals melt Temperature - rise in temperature can cause minerals to melt Composition - When fluids such as water mix with rock, it lowers the melting point of the rock causing it to melt. Igneous Rock.

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IGNEOUS ROCKS

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  1. IGNEOUS ROCKS

  2. Origins of Igneous Rock 3 Ways • Pressure- Hot rock releases pressure and minerals melt • Temperature- rise in temperature can cause minerals to melt • Composition- When fluids such as water mix with rock, it lowers the melting point of the rock causing it to melt

  3. Igneous Rock • Forms when magma cools and solidifies. Does the type of igneous rock being formed depend on the time it takes the magma to cool?

  4. Composition and Texture of Igneous Rocks • All igneous rocks differ from one another because of the minerals they are made of and how fast they cool

  5. Composition and Texture of Igneous Rocks • Felsic- Light colored Rocks, rich in aluminum, potassium, silicon, and sodium. Low in density and low in Iron and Magnesium

  6. Composition and Texture of Igneous Rocks • Mafic- dark colored rocks, rich in calcium, Iron, and magnesium Gabbro is polished and used to make headstones. AKA “Black Granite”

  7. Igneous Rock Formation • Are located above and beneath the surface of the Earth.

  8. Igneous Rock Formation • Intrusive Igneous Rock- form below the Earth’s surface when magma enters a pocket or chamber underground that is relatively cool, it solidifies into large visible crystals Granite Gabbro

  9. Igneous Rock Formation • Extrusive Igneous Rocks- form when magma makes its way to Earth's surface. The molten rock erupts or flows above the surface as lava, and then cools forming rock. Most extrusive (volcanic) rocks have small crystals.

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