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Volcanoes

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Submitted By rebeccayy
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I thought it would be interesting to compare some different volcanoes. You'll have to do a little bit of research on these. There is some info in the textbook and pdfs, but you'll likely need to surf the net for some information. Email me if you are having any problems... so 3 volcanoes:
1) Réunion is an island in the Indian Ocean, to the east of Madagascar.
2) Yellowstone- Not everyone is familiar with Yellowstone, but it is a volcanic region known for geysers (jets of hot water/steam) in Wyoming, Montana, and Idaho (USA). A gorgeous National Park to visit.
3) Olympus Mons on Mars.
All of these volcanoes have similarities and differences. As with any analysis of volcanism, it generally comes down to crustal chemistry and the sources of the magma that erupts.
Compare the volcanoes using these questions. Perhaps make up a table...

a) How did these volcanoes form? Plate tectonics? Plume? How do we know?

Reunion | •This was formed from a mantle hot spot. •3 calderas formed 250,000, 65000, and 5000 years ago by slumping of the volcano. | Yellowstone | It all started with a hot spot beneath Yellowstone. Approximately, 600 thousand years ago the hot spot released hot magma towards the surface and pushing the earth’s crust upwards thus creating a large chamber which was filled with magma. Cracks formed over time due to the large pressure inside the dome and a huge eruption expelled magma, emptying the top part of the chamber. Earth’s crust collapsed and formed a caldera. Magma kept flowing into the caldera for the next 500 thousand years. | Olympus Mons | Olympus mons formed by hot spot plume. - no tectonic plate movement Unlike earth with tectonic movement where the hot spot moves from one area to another, causing creation of multiple volcanoes ( Hawaii). The hotpsot on Olympus mon is stagnant, when lava flows to the surface, it continues to pile up in a

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