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Volcanoes Jessica Redmond

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Volcanoes . Jessica Redmond. What is a super volcano?. A Super Volcano or a super volcanic eruption is an eruption that ejects greater than 240 cubic miles . . When and where? . The last one was in Sumatra, called Toba. It erupted about 75,000 years ago. - PowerPoint PPT Presentation

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Page 1: Volcanoes

Volcanoes

Jessica Redmond

Page 2: Volcanoes

What is a super volcano?

• A Super Volcano or a super volcanic eruption is an eruption that ejects greater than 240 cubic miles.

Page 3: Volcanoes

When and where?

• The last one was in Sumatra, called Toba. • It erupted about 75,000 years ago. • 10 thousand times bigger than MT. st Helens.

Page 4: Volcanoes

What did the eruption cause?

• Deforested most of central India. • 800 cubic kilometers of ash into the

atmosphere, leaving a crater which is now the largest volcano lake.

Page 5: Volcanoes

Yellowstone Volcano? What evidence is there that it is active?

• Not your typical volcano because of size, scale, and frequency of eruption.

• The magma is as close as 5 miles underground in some spots, which fuels thousands of spewing geysers, hissing steam vents, gurgling mud spots, and steaming hot springs.

Page 6: Volcanoes

Volcano in Mexico

• Called Paricutin• Began as a fissure in a cornfield. • Erupted for over 9 years. • Got as big as 1,309.08 ft.

Page 7: Volcanoes

The biggest volcano on earth.

• Mauna Loa. • One of the 5 volcanoes that make up the Big

Island of Hawaii. • Scientists think it has been erupting for over

700,000 years.• It erupted last in 1984 and destroyed homes

and villages.