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HOT SPOT

HOT SPOT. Lesson Overview Hot Spot Theory Shield Volcanoes Generalized Eruption Volcanic Features Chaos Theory. Hot Spot. Theory.

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HOT SPOT

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  1. HOT SPOT

  2. Lesson Overview Hot Spot Theory Shield Volcanoes Generalized Eruption Volcanic Features Chaos Theory

  3. Hot Spot Theory

  4. “The big conclusion from our Leg is that the Hawaiian hotspot was moving south at a fairly high velocity in the period of Emperor Seamount production about 80 to 45 million years ago Then the hotspot stopped moving and plate motion took over, creating the Hawaiian-Emperor bend.”

  5. “Propagating Crack”

  6. Typical Big Island Basalt

  7. Tholeiitic Basalt weathered olivine

  8. Alkali Basalt

  9. Pre-shield alkalic stage

  10. Shield building tholeiitic stage Pre-shield alkalic stage

  11. Capping stage alkalic basalt Shield building tholeiitic stage Pre-shield alkalic stage

  12. Capping stage alkalic basalt Shield building tholeiitic stage Pre-shield alkalic stage

  13. 120o 120o 120o Ideally equally spaced

  14. Cinder cones along Haleakala’s western rift

  15. Alkali basalt (14o) Haleakala’s south slope Tholeiitic basalt (9o)

  16. Most Recent EruptionMarch 24-April 15, 1984

  17. Kohala

  18. Mauna Kea

  19. Mauna Kea alkalic cap

  20. Mauna Kea

  21. Hualalai Muana Loa Kilauea view

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