1. Volcanoes
Types, lava, and rocks

2. Cinder Cone Simplest type
Built from volcanic debris from a single vent
Most have bowl shaped crater
Height reaches about 1000 ft above their surroundings

5. Parícutin in 1994
Mexico
Formed over 9 years

6. Composite or Stratovolcano
Steep sided
Symmetrical cone
Alternating layers of ash, lava, cinder blocks
Can be over 8000 ft tall
Have crater with central vent

7. Famous composite volcanos
Mount Fuji in Japan
Mount Cotopaxi in Ecuador
Mount Shasta in California
Mount Hood in Oregon
Mount St. Helens and Mount Rainier in Washington.

13. Shield Volcano Entirely built of lava Gently sloping sides
Looks like warrior's shield from the side

15. Mauna Loa

16. Lava Dome Formed by lava that is too thick to flow any large distance
Lava piles around the vent

18. Kelud Volcano

19. Types of lava AA Pahoehoe Pillow Slow moving Sharp edges Fast moving
Smooth edges
Pillow
Form under water
If on land is evidence that was once under water

20. AA lava

21. AA lava

22. Pahoehoe

23. Pahoehoe

24. Pillow Lava

25. Pillow Lava

26. Rocks that form from volcanos

27. Igneous rocks Rocks that form from lava
Can cool either quickly or slowly
The way they cool will impact their structure
2 types – intrusive and extrusive

28. Granite Best know of all igneous rocks
Mixture of different types of rocks
Formed underground

29. Granite

30. Rhyolite Extrusive rock, formed on the surface
Light colored silicates like granite
Cool rapidly

31. Rhyolite

32. Andesite
Medium-grey color
Fine grain size
From volcanos

33. Andesite

34. Diorite Intrusive rock, forms underground Coarse-grained
No visible quartz crystals
Dark color

35. Diorite

36. Basalt Dark colored Small crystals
Usually formed above ground from volcanic origins
A lot of deposits in Oregon and Washington

37. Basalt

38. Gabbro Forms underground Dark green to black color
Makes up a lot of oceanic crust

39. Gabbro

40. Obsidian Volcanic glass Cools very quickly Black or green in color
Can have very sharp edges when broken
Used as tools for centuries because of sharpness and hardness

41. obsidian

42. Pumice
glassy texture
Formed with large amount of gas makes frothy mixture
Many pieces will float in water
Many people use it to smooth out and remove dead layer of skin

43. Pumice

44. Scoria Heavier than pumice Made of frothy lava with less air
Usually red in color
Used in gas grills to help with distribution of heat

45. Scoria