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Press Release 08-148

Yellowstone's Ancient Supervolcano: Only Lukewarm?

Molten plume of material beneath Yellowstone cooler than expected

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Photo of a geyser in Yellowstone National Park.

Yellowstone National Park and its famous geysers are the remnants of an ancient supervolcano.

Credit: U.S. Geological Survey


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Topography of Yellowstone National Park showing the volcano's caldera, or sunken floor.

The Yellowstone volcano's caldera, or sunken floor, covers an immense area.

Credit: U.S. Geological Survey


Download the high-resolution JPG version of the image. (196 KB)

Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.