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Bruneau-Jarbidge caldera

View on map:42.300000°N 115.200000°W

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Related to the Yellowstone Hotspot.

Description


Bruneau-Jarbidge caldera

The Bruneau-Jarbidge caldera (sometimes called a supervolcano) is located in present-day southwest Idaho. The volcano erupted during the Miocene, between ten and twelve million years ago, spreading a thick blanket of ash in the Bruneau-Jarbidge event and forming a caldera. Animals were suffocated and burned in pyroclastic flows within a hundred miles of the event, and died of slow suffocation and starvation much farther away, notably at Ashfall Fossil Beds, located 1000 miles downwind in northeastern Nebraska, where up to two meters of ash was deposited. At the time, the caldera was above the Yellowstone hotspot.

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