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Oceanic Hot Spots

Oceanic Hot Spots. A Chain of Volcanoes is created by the moving plate:. The hotspot stays in one place while the plate moves over it Click here for a visualization. Examples of Lava Flows on Kilauea. Basaltic. LOW. Rarely. Increase in temperature. Flows: Pahoehoe, Aa, Pillow.

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Oceanic Hot Spots

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  1. Oceanic Hot Spots

  2. A Chain of Volcanoes is created by the moving plate: • The hotspot stays in one place while the plate moves over it • Click here for a visualization

  3. Examples of Lava Flows on Kilauea

  4. Basaltic LOW Rarely Increase in temperature Flows: Pahoehoe, Aa, Pillow Shield Volcano, Chain of Islands Does not occur at a plate boundary Hawaii, Iceland

  5. Continental Hot Spots

  6. Yellowstone About 600,000 years ago: • HUGE volcanic eruptions occurred in Yellowstone, emptying a large underground magma chamber. • Volcanic debris spread for thousands of square miles in a matter of minutes. • The roof of this chamber collapsed, forming a giant smoldering pit. • This caldera was 30 miles (45 km) across, 45 miles (75 km) long, and several thousand feet deep. • Eventually the caldera was filled with lava.

  7. 15-13mya

  8. Obsidian: Volcanic glass are common rhyolitic flows

  9. The Grand Canyon of Yellowstone is made out of rhyolite.

  10. Basalt flows can also occur at continental hot spots because some of the magma comes directly from the mantle.

  11. Rhyolitic HIGH Extremely Increase in temperature MAINLY Rhyolitic Flows (Obsidian), but also Basaltic flows. In Yellowstone this formed a caldera. Does not occur at a plate boundary. Yellowstone National Park, Wyoming and Montana

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