1. http://www.youtube.com/watch? v=wv4M4wror58

2. ROCK Composed of one or more minerals Classified by 1.Origin – how they were formed 2.Mineral Content 3.Texture

3. ROCK Composed of one or more minerals Classified by 1.Origin – how they were formed 2.Mineral Content 3.Texture

4. IGNEOUS ROCKS ESRT Page 6 http://www.youtube.com/watch?v= aCnAF1Opt8M http://www.youtube.com/watch?v= aCnAF1Opt8M

6. Formation Solidification of magma Made up of inter grown mineral crystals Environments a. Magma – below ground b. Lava – above ground

7. a. Texture Determined by the rate of cooling, refers to the size, shape and arrangement of crystals which grew out of the cooling magma/lava

8. 1. Intrusive You can visibly see the ____________ cooled slowly, deep beneath the Earth’s surface large to medium crystals Mineral crystals

9. Pegmatite – Very Coarse Texture

10. Granite - Coarse Texture

11. 2. Extrusive Very small or no _______________ cooled quickly on earth’s surface glassy to fine (can see with a hand lens) crystals Mineral crystals

12. 3. Porphyritic Contains crystals of two markedly different sizes identify with the majority of crystals

13. 4. Vesicular Porous from trapped gas pockets

14. b. Color Based on the mineral content or what it is made of

15. Mafic Dark colored, high in Iron (Fe) and Magnesium (Mg), more dense

16. Felsic Light colored, high in Aluminum (Al) and Silicon (Si), less dense

23. HOW DO YOU KNOW ITS AN IGNEOUS ROCK 1.Mineral Crystals or 2.Vesicular – Gas pockets

24. Order in which minerals crystallize from a cooling magma/lava to form igneous rocks