1. 3.2 Igneous rocks form from molten rock

2. Rocks and Minerals
Rocks: naturally occurring combination of minerals (minerals are the building blocks for rocks)
Minerals: natural, solid substance that has definite chemical composition and physical structure. All rocks contain minerals.
The building block of rocks

3. Igneous Rocks “fire rocks” Cooled magma or lava
Magma= molten (melted) rock inside earth
Lava= molten rock that reaches the surface of earth
**heating and cooling of in mantle layer may lead to this formation

4. Igneous

5. 2 Types of Igneous Rock
Intrusive : Igneous rock that forms as magma cools BELOW the Earth’s surface (also called plutonic rock)
Example: Granite

6. Extrusive Rock
Igneous rock that forms as lava cools ON Earth’s surface
Example: pumice and rhyolite
Basalt forms on ocean floor

7. Igneous rock texture Depends on how fast the magma cool.
Intrusive rocks tend to have large crystals
Extrusive rocks tend to have smaller crystals

8. Intrusive Igneous rock formation Rock Ship (New Mexico)

9. Basalt Columns at Yellowstone National Park