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(back more in my element)

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Bunsen Peak, 49 million years old, member of the Washburn (earliest) group of the Absaroka Volcanic Province, is awfully humble as far as volcanoes go. But picture 18,000 years ago, when the Yellowstone icecap was the largest ice field in North America discontinuous with the continental ice sheet, and portions of the Yellowstone Plateau were under 4,000 feet of ice that was slowly flowing outwards. Well, 600 feet of this ice was flowing directly over the top of Bunsen, grinding it away.

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