1. I. Rock Types II. Cooling & Crystallization III. Composition IV. Rock Formations

2. A. Intrusive Rocks – Form when magma or molten rock beneath Earth’s surface cools & crystalizes B. Extrusive Rocks – Form when lava on Earth’s surface cools and crystalizes

3. GRANITE: Intrusive Rock

6. Extrusive Ejected Material Solidifies in the air

8. A. Intrusive Igneous Rock – Cools slowly allowing for large crystal formation (coarse grained). B. Extrusive Igneous Rock – Cools quickly and does not allow time for crystallization (fine grained)

11. A. Mafic – Contains many dark colored minerals. High non- silicate and low silicate compositions B. Felsic – Contains many light colored minerals. High silicate composition.

14. A. Intrusive – Batholith, pluton, stock, sill, laccolith, dike, volcanic pipes. B. Extrusive – All volcano types, lava flows, pyroclastic ejected material.

15. Igneous Rock Structures Missing plutons

16. Devils Tower, WY

17. Half Dome, CA Ask Mrs. Zwick

18. Mauna Kea, HA

19. Hawaii

20. New Mexico