Volcanoes beautiful killers
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This document discusses volcanoes and includes photos of various volcanoes from around the world. It describes some of the key factors that influence volcanic eruptions, including lava viscosity which is controlled by temperature and silica content. It also discusses the three V's of volcanology - volume, volatiles and viscosity - which determine the eruption type and resulting landforms. The document also mentions the Volcanic Explosivity Index scale from 0-8 that is used to characterize eruptions based on pyroclastic volume, eruption column height and duration.
Volcanoes beautiful killers
- 1. VOLCANOES- BEAUTIFUL KILLERS Nathalie Nicole Brandes Professor of Geology
- 2. (Courtesy New Line Cinema)
- 4. Tongariro, Manawatu-Wanganui , New Zealand
- 5. Tongariro, Manawatu-Wanganui , New Zealand
- 7. Erta Ale, Afar Region, Ethiopia
- 8. Mt. St. Helens, Washington, USA (Courtesy USGS)
- 10. Soufrière Hills, Montserrat (Courtesy Smithsonian Institute)
- 12. (Courtesy University of Auckland)
- 13. •Each lava composition has a different viscosity •Viscosity is controlled by: –Temperature –Silica content
- 14. Carrizozo Malpais, New Mexico, USA
- 17. The Three V’s of Volcanology •Volume •Volatiles •Viscosity •These three determine the eruption type and landform created
- 18. (Courtesy Florida State University)
- 20. (Courtesy Technische Universität Bergakademie Freiberg)
- 22. (Courtesy University of Colorado Denver)
- 23. Rangitoto Island, Auckland, New Zealand
- 24. Rangitoto Island, Auckland, New Zealand (Google Earth Image)
- 26. Mt. Etna, Sicily, Italy
- 27. Sunset Crater, Arizona, USA
- 29. ParÃcutin, Michoacán, Mexico (Courtesy Michigan Technological University)
- 30. ParÃcutin, Michoacán, Mexico (Courtesy Michigan Technological University)
- 32. Mt. St. Helens, Washington, USA
- 33. Mt. St. Helens, Washington, USA
- 35. Ruapehu, Manawatu-Wanganui, New Zealand
- 36. (Courtesy Dr. Paula Jefferis-Nilsen)
- 37. Jemez Mountains, New Mexico, USA
- 38. Jemez Caldera, New Mexico (Courtesy NASA)
- 39. Valle Grande, New Mexico, USA
- 41. Schalkenmehrener Maar, Rhineland-Palatinate, Germany
- 43. Waha‘ula Visitor Center, Hawai’i, USA (Courtesy J.D. Griggs)
- 44. Ruapehu, Manawatu-Wanganui, New Zealand (Courtesy Geoff Mackley)
- 45. Mt. St. Helens, Washington, USA
- 46. Mt. St. Helens, Washington, USA (Courtesy USGS)
- 47. Eyjafjallajökull, Suðurland, Iceland (Courtesy Sigurður Stefnisson)
- 48. Mayon Volcano, Philippines (Courtesy USGS)
- 49. Taupo, Waikato, New Zealand
- 50. Louis-Auguste Cyparis (Photographer unknown)
- 51. Ruapehu, Manawatu-Wanganui , New Zealand
- 52. VOLCANIC EXPLOSIVITY INDEX (VEI) •Scale of 0-8 •Based on: –Volume of pyroclastics –Eruption column height –Duration of eruption