EART 3 Geology of National Parks 20604

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EART 3- Geology of National Parks 2/06/04

• OUTLINE
• How Hawaiian Islands Formed
• Hawaii Volcanoes National Park
• Haleakala National Park
• CONCEPTS
• More plate tectonics
• Effusive volcanism

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Shield Volcano large with gradually sloping
sides built of successive lava flows
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Non-violent or effusive eruption
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Lava liquid rock that cools to become pahoehoe
(smooth) or aa (blocky)
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aa
pahoehoe
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1/slope distance (km)
velocity
Time (my)
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Rift Zone
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