Igneous Rocks.

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Presentation transcript:

Igneous Rocks

S6E5. Students will investigate the scientific view of how the earth’s surface is formed c. Classify rocks by their process of formation.

How are igneous rocks formed? When hot, liquid magma cools and solidifies becoming lava.

Composition & Texture of Igneous Rocks Mafic rocks= light-colored and less dense Examples: Basalt & Gabbro Felsic rocks= dark-colored and more dense Examples: Granite & Rhyolite

Composition and Texture of Igneous Rocks Coarse-grained= Feels rough (large crystals are formed) Fine-grained= Feels smooth (small crystals are formed)

Types of Igneous Rocks Intrusive igneous rock= Rock formed below the Earth’s surface Extrusive igneous rock= Rock formed at or near the Earth’s surface

Content Objective Be able to describe the process that forms igneous rocks. Be able to explain the difference between intrusive and extrusive igneous rocks and the texture of each.