24. Ash & dust

25. Volcanic Bombs This dacite breadcrust bomb (about 15 cm in diameter) was erupted from the lava dome at Mount St. Helens, Washington.

29. Where do Volcanoes Occur?

30. Where do Volcanoes Occur? location Examples Divergent Boundaries : where plates move APART Iceland

31. Where do Volcanoes Occur? location Examples convergent Boundaries : where plates come together Cascade range volcanoes, Andes

33. Where do Volcanoes Occur? location Examples Hot Spots : plates riding over an especially hot place in the mantle Hawaii, Yellowstone, Iceland

34. Hot Spots

46. Shield volcano on Mars; Taken from space Take a look at these examples: http://www.volcano.si.edu/world/tpgallery.cfm?category=Shield%20Volcanoes The Mauna Loa volcano in Hawaii—the largest volcano on Earth—has the broad expanse characteristic of shield volcanoes. It spreads across half the island of Hawaii.

50. STrato/Composite Llaima Volcano, Chile.

52. Composite/strato volcanoes

54. Mt St. Helens

57. Crater Lake