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Press Release 10-099

Volcanic Eruptions in North America Were More Explosive in Ancient Past

The next Yellowstone eruption could be similar volcanic event

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Photo of ancient volcanic ash beds exposed at Scotts Bluff in Nebraska.

Multiple ancient volcanic ash beds exposed at Scotts Bluff in Nebraska.

Credit: Huiming Bao


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Photo of 31-15 million year old volcanic deposits lining Scotts Bluff National Monument, Nebraska.

Volcanic deposits from 35-15 million years ago line Scotts Bluff National Monument, Nebraska.

Credit: Huiming Bao


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Photo of gypsum crystals embedded in calcite in a volcanic ash bed in Scotts Bluff.

Gypsum crystals embedded in calcite in a 28-million-year-old volcanic ash bed in Scotts Bluff.

Credit: Huiming Bao


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Photo of an ancient volcanic ash bed exposed at Scotts Bluff National Monument.

An ancient volcanic ash bed exposed at Scotts Bluff National Monument.

Credit: Huiming Bao


Download the high-resolution JPG version of the image. (839 KB)

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