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Igneous Rocks

Igneous Rocks. Chapter 2.3. Igneous Rock is any rock formed from magma or lava. The name Igneous comes from the Latin word ignis , meaning “fire.” Igneous rock is classified according to their origin, texture, and mineral composition. Igneous Rock.

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Igneous Rocks

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  1. Igneous Rocks Chapter 2.3

  2. Igneous Rock is any rock formed from magma or lava. • The name Igneous comes from the Latin word ignis, meaning “fire.” • Igneous rock is classified according to their origin, texture, and mineral composition. Igneous Rock

  3. Extrusive rock is igneous rock formed from lava that erupted onto Earth’s surface. • Basalt is the most common extrusive rock. • Basalt is one of the most common rocks on Earth. • A layer of basalt forms much of Earth’s ocean floors. Origin…

  4. Intrusive rock formed when magma hardened beneath Earth’s surface. • The most abundant intrusive rock is granite. • Granite forms the core of many mountain ranges. Intrusive Rock

  5. The texture of igneous rock depends on the size and shape of its mineral crystals. • Igneous rock can have very different textures. • Porphyry is an intrusive rock. It looks like Jello with fruit inside. • Obsidian is an extrusive rock. It is like a smooth, shiny piece of glass. Texture

  6. Most of Earth’s minerals contain silica, a material formed from oxygen and silicone. • Lava is low in silica and usually produces dark colored rock. • Magma is high in silica and usually produces light colored rock. Mineral Composition…

  7. Many igneous rocks are hard, dense, and durable. • People throughout time have used igneous rock for tools and building materials. • The rough surface of pumice is known to be used for polishing and cleaning. Uses of igneous rock…

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