Home | Session 2 | Volcanoes 1, 2, 3, 4, 5

Volcanoes

Presented by Ellen Metzger

1. Volcanoes and People

A. What are some volcanic hazards?

B. Is there anything good about volcanoes?

2. Volcanoes and Plate Tectonics
   Activity: Volcanoes Where and Why? (Crustal Evolution Education Project)

A. Volcanoes at divergent boundaries

Volcanism at mid-ocean ridge spreading centers - basaltic lava. Example: Iceland.

B. Volcanoes at convergent boundaries

Subduction zone volcanoes in Pacific Ring of Fire. Magma forms by partial melting of mantle above descending plate (very little of the plate melts).

C. Hot spot volcanoes

Volcanoes within instead of at edges of plates. Examples: Hawaii; Yellowstone.

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updated January 28, 2002

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