The White River ash layer found in eastern Alaska and western Yukon Territory resulted from the most explosive eruptions to occur in North America over the past ~2,000 years. Mount Churchill, located in the Saint Elias Mountains, is the volcano responsible for these massive events. As the tallest volcano in Alaska at 15,636 feet and due to its permanent snow and ice cover, Mount Churchill is difficult to monitor and study. However, its violent history increases the urgency to learn what its past might tell us about its future.

Data gleaned from volcanic rocks are helping scientists better understand the origins of Mount Churchill’s violent eruptions. By studying the ash and producing magma in the lab to simulate the depths and temperatures in the Earth's crust, Jessica Larsen hopes to provide information about what to expect if Churchill again shows signs of unrest

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