1. Igneous Rocks

2. Igneous rocks  Are rocks formed from solidified/cooled magma  Are made of interlocking crystals  Interlocking crystals make strong rock resistant to weathering and erosion

3. Igneous rock formation

4. Igneous rocks  Contain silicate minerals; atoms of silicon and oxygen and other minerals

5. Igneous rocks  Are identified by 1) color 2) crystal size

6. Intrusive igneous rock  Is rock formed/cooled inside the earth’s crust  Cools slowly and forms larger crystals

8. Vietnam veterans memorial black granite

9. Extrusive igneous rock  Rock that forms when lava cools  Cooling is faster so crystals form more quickly and are smaller

10. obsidian

11. basalt

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