1. http://volcano-pictures.info/ Crater Lake: Oregon Mount Mazama Volcano Mauna Loa Hawaii fissure

2. What is a volcano:A weakened place in the Earths crust where magma erupts as lava.

3. Magma: Molten rock, gases, and water. Melting from: Heat, pressure, and water Lava: mostly molten rock, the gases and water evaporate at the surface.

5. Major volcanic zones: 1. Ring of fire because of subduction zones. Island arcs

6. 2. Mid-Ocean Ridges: seafloor spreading, pillow lava’s Iceland

8. Hot Spot Volcano’s: Hawaii, Yellowstone,Hawaii, Yellowstone, Congo, 1.Mantle plumes of magma feed these volcano’s from deep in the mantle.

14. sill dike Volcanic neck Extinct volcano Lava rock

15. Plutons

16. Devils Tower is a Pluton

17. Section 2: Volcanic Eruptions 1.Mafic Eruptions: Magnesium Ma and iron Fe so….. MaFic a. Low Silica (sand or quartz) and gas b. Low Viscosity: Very runny lava c. Quiet eruptions

18. d. Pahoehoe lava “ropy”: very mafic, runny

19. e. Aa lava: sharp jagged lava.

20. f. Blocky lava: higher silica and viscosity.

21. Felsic Eruptions: 1.Violent 2. High in silica 3.Granitic in nature. Pyroclastic flow

22. Types of Volcanoes: 1.Shield volcano: like a shield laying upside down. Hawaii is a huge shield volcano

23. Hawaii shield

25. Composite Volcano alternating layers of lava and ash build the Volcano into its classic shape.

26. Lava flows Ash layers

27. Toba Caldera: Indonesia

28. The eruption takes place at several places at the same time within the volcano.

29. Cinder cone: Steep side and made of cinders.

30. Erupting cinder cone in Hawaii